Hioki FT3700-20 User manual
1234
Warranty
Warranty malfunctions occurring under conditions of normal use in con-
formity with the Instruction Manual and Product Precautionary Mark-
ings will be repaired free of charge. This warranty is valid for a period
of one (1) year from the date of purchase. Please contact the distribu-
tor from which you purchased the product for further information on
warranty provisions.
Introduction
Thank you for purchasing the HIOKI “Model FT3700-20,
FT3701-20 INFRARED THERMOMETER.” To obtain maximum
performance from the instrument, please read this manual first,
and keep it handy for future reference.
The Model FT3700-20, FT3701-20 is a non-contact thermome-
ter using infrared rays.
It can measure the surface temperature of an object by measur-
ing the energy level of the infrared rays emitted from the object
without touching it.
• Liquid crystal display with backlight
• Two-point Laser marker beams
• Thermal emissivity setting function
• Display and sound alarm functions
Initial Inspection
When you receive the instrument, inspect it carefully to ensure
that no damage occurred during shipping. In particular, check
the accessories, the liquid crystal display, the control keys, and
the lens. If damage is evident, or if it fails to operate according to
the specifications, contact your dealer or HIOKI representative.
Maintenance and Service
• To clean the instrument, wipe it gently with a soft cloth moistened with
water or mild detergent. Never use solvents such as benzene, alcohol,
acetone, ether, ketones, thinners or gasoline, as they can deform and
discolor the case.
• If the instrument seems to be malfunctioning, confirm that the batteries
are not discharged before contacting your dealer or HIOKI representative.
• Pack the instrument so that it will not sustain damage during shipping,
and include a description of existing damage. We do not take any
responsibility for damage incurred during shipping.
This manual contains information and warnings essential for safe opera-
tion of the instrument and for maintaining it in safe operating condition.
Before using it, be sure to carefully read the following safety precautions.
Safety Symbol
Symbols for Various Standards
The following symbols in this manual indicate the relative importance
of cautions and warnings.
Follow these precautions to ensure safe operation and to obtain the full
benefits of the various functions.
Preliminary Checks
Before using the instrument the first time, verify that it operates normal-
ly to ensure that the no damage occurred during storage or shipping.
If you find any damage, contact your dealer or HIOKI representative.
1. LCD Display
2. MODE Key
Changes the instrument's mode (see "Changing the Mode").
3. Down/°C/ °F Key
Press one time: Changes (decreases) the setting.
Press and hold while pulling the measurement trigger (1 sec.):
Toggles the laser marker on and off.
Change temperature units (except when using the emissivity
setting, HAL mode, or LAL mode).
4. Up/LOCK Key
Press one time: Changes (increases) the setting.
Turns continuous measurement mode on and off
(except when using the emissivity setting, HAL
mode, or LAL mode).
Press and hold while pulling the measurement trigger (1 sec.):
Toggles the backlight on and off.
5. Meas. Key
Pull the trigger to switch on the power to start measuring.
6. Infrared Lens
Infrared rays from the object whose temperature is to be measured
are received here.
7. Laser
The laser marker beams are emitted from here.
8. Battery cover
Overview
Inspection and Maintenance
FT3700-20
FT3701-20
INFRARED THERMOMETER
Instruction Manual
September 2013 Revised edition 2 Printed in Japan
FT3700A981-02 13-09H
Safety
Mishandling this instrument during use could result in
injury or death, as well as damage to the instrument. Be
certain that you understand the instructions and precau-
tions in the manual before use. We disclaim any respon-
sibility for accidents or injuries not resulting directly
from instrument defects.
In the manual, the symbol indicates particularly important infor-
mation that the user should read before using the instrument.
Indicates warnings relating to the laser.
WEEE marking:
This symbol indicates that the electrical and electronic appli-
ance is put on the EU market after August 13, 2005, and pro-
ducers of the Member States are required to display it on the
appliance under Article 11.2 of Directive 2002/96/EC (WEEE).
This symbol indicates that the product conforms to safety reg-
ulations set out by the EC Directive.
Indicates that incorrect operation presents an extreme haz-
ard that could result in serious injury or death to the user.
Indicates that incorrect operation presents a significant haz-
ard that could result in serious injury or death to the user.
Indicates that incorrect operation presents a possibility of
injury to the user or damage to the device.
Indicates advisory items related to performance or correct
operation of the instrument.
Usage Notes
Do not allow the laser light beam to impinge upon any
gas which can explode.
• Use of controls or adjustments or performance of proce-
dures other than thosespecified herein may result in hazard-
ous radiation exposure.
•TheModelFT3700-20, FT3701-20 uses as a light source a
semiconductorlaserwhichemits visiblelight,andwhichcon-
forms to IEC standard class 2 (IEC 60825-1). (Wavelength
640 nm to 660 nm, maximum power output 1 mW)
Since there is considerable danger of this laser light causing
damage to the eyes, be very careful not to direct this laser
light into your eyes or those of another person.
• Do not look directly into the laser light from the optical system.
• When measuring the temperature of an object which has a
mirror finish, be careful not to allow the laser light beam to be
reflected off the surface into your eyes or those of another
person.
• This instrument should be installed and operated indoors on-
ly, between 0 and 50°C and 80% RH or less.
• Do not store or use theinstrument where it could be exposed
to direct sunlight, high temperature or humidity, or conden-
sation. Under such conditions, the instrument may be dam-
aged and insulation may deteriorate so that it no longer
meets specifications.
• This instrument is not designed to be entirely water- or dust-
proof. Do not use it in an especially dusty environment, nor
where it might be splashed with liquid. This may cause damage.
• Do not use the instrument where it may be exposed to corrosive
or combustible gases. The instrument may be damaged.
• Do not use the instrument
near a source of strong electro-
magnetic radiation, or near a highly electrically charged ob-
ject. These may cause a malfunction.
• To avoid damage to the instrument, protect it from physical
shock when transporting and handling. Be especially careful
to avoid physical shock from dropping.
• Do not point the lens at the sun or at any other source of
strong light. If you do, the sensor may be damaged.
• Do not contact the lens against the object whose tempera-
ture is to be measured, or get it dirty, allow it to be scratched,
or allow any foreign material to adhere to it. Doing so may
cause errors.
The indicator flashes when the remaining battery capacity
is low. In this case, the instrument's reliability is not guaranteed.
Replace the battery immediately.
Replacing Batteries
When replacing the batteries, be careful not to acciden-
tally pull the measuring trigger key. This may cause the
laser marker to enter the eyes and is extremely danger-
ous. After replacing the batteries, be sure to close the
cover before using the instrument.
• Battery may explode if mistreated. Do not short-circuit,
recharge, disassemble or dispose of in fire.
• Handle and dispose of battery in accordance with local
regulations.
• Do not mix old and new batteries, or different types of batter-
ies. Also, be careful to observe battery polarity during instal-
lation. Otherwise, poor performance or damage from battery
leakage could result.
• To avoid corrosion and damage to this instrument from bat-
tery leakage, remove the batteries from the instrument if it is
to be stored for a long time.
The battery cover has been designed to fit tightly in order pre-
vent accidental opening.
1. Hold the instrument with both hands as
shown in the diagram.
2. Twist the battery cover in the direction as
shown in the diagram to open it.
3. Take out the batteries.
4. Install new batteries (LR03) in the case,
being careful to observe proper battery
polarity.
5. Close the battery cover.
Battery cover
Remaining battery life indicator
There is ample battery life remaining.
Replace the batteries soon.
No battery life remaining. The instru-
ment cannot be used in this state.
Names and Function of Parts
2
1
34
5
67
8
8
9
10
LCD Display
1. Indicates the lit setting for laser marker. (When this lamp is off,
the laser maker beam is not emitted)
This lamp will blink when the laser marker beam is being emitted
during lit setting.
2. Indicates the backlight setting. (When this lamp is off, the laser
maker beam is not emitted)
3. "HI" indicates that the alarm setting's upper limit temperature
has been exceeded. "LO" indicates that the reading is lower
than the lower limit temperature.
4. Indicates that measurement is in progress.
5. Indicates the battery consumption level (refer to Replacing
Battery)
6. Main display: Indicates the measurement value.
7. Sub-display: Indicates the mode and associated value.
8. Indicates the temperature units.
9. Indicates that the measurement value is being maintained.
10. Indicates that continuous measurement mode is active.
143
2
7
6
5
1234
Warranty
Warranty malfunctions occurring under conditions of normal use in con-
formity with the Instruction Manual and Product Precautionary Mark-
ings will be repaired free of charge. This warranty is valid for a period
of one (1) year from the date of purchase. Please contact the distribu-
tor from which you purchased the product for further information on
warranty provisions.
Introduction
Thank you for purchasing the HIOKI “Model FT3700-20,
FT3701-20 INFRARED THERMOMETER.” To obtain maximum
performance from the instrument, please read this manual first,
and keep it handy for future reference.
The Model FT3700-20, FT3701-20 is a non-contact thermome-
ter using infrared rays.
It can measure the surface temperature of an object by measur-
ing the energy level of the infrared rays emitted from the object
without touching it.
• Liquid crystal display with backlight
• Two-point Laser marker beams
• Thermal emissivity setting function
• Display and sound alarm functions
Initial Inspection
When you receive the instrument, inspect it carefully to ensure
that no damage occurred during shipping. In particular, check
the accessories, the liquid crystal display, the control keys, and
the lens. If damage is evident, or if it fails to operate according to
the specifications, contact your dealer or HIOKI representative.
Maintenance and Service
• To clean the instrument, wipe it gently with a soft cloth moistened with
water or mild detergent. Never use solvents such as benzene, alcohol,
acetone, ether, ketones, thinners or gasoline, as they can deform and
discolor the case.
• If the instrument seems to be malfunctioning, confirm that the batteries
are not discharged before contacting your dealer or HIOKI representative.
• Pack the instrument so that it will not sustain damage during shipping,
and include a description of existing damage. We do not take any
responsibility for damage incurred during shipping.
This manual contains information and warnings essential for safe opera-
tion of the instrument and for maintaining it in safe operating condition.
Before using it, be sure to carefully read the following safety precautions.
Safety Symbol
Symbols for Various Standards
The following symbols in this manual indicate the relative importance
of cautions and warnings.
Follow these precautions to ensure safe operation and to obtain the full
benefits of the various functions.
Preliminary Checks
Before using the instrument the first time, verify that it operates normal-
ly to ensure that the no damage occurred during storage or shipping.
If you find any damage, contact your dealer or HIOKI representative.
1. LCD Display
2. MODE Key
Changes the instrument's mode (see "Changing the Mode").
3. Down/°C/ °F Key
Press one time: Changes (decreases) the setting.
Press and hold while pulling the measurement trigger (1 sec.):
Toggles the laser marker on and off.
Change temperature units (except when using the emissivity
setting, HAL mode, or LAL mode).
4. Up/LOCK Key
Press one time: Changes (increases) the setting.
Turns continuous measurement mode on and off
(except when using the emissivity setting, HAL
mode, or LAL mode).
Press and hold while pulling the measurement trigger (1 sec.):
Toggles the backlight on and off.
5. Meas. Key
Pull the trigger to switch on the power to start measuring.
6. Infrared Lens
Infrared rays from the object whose temperature is to be measured
are received here.
7. Laser
The laser marker beams are emitted from here.
8. Battery cover
Overview
Inspection and Maintenance
FT3700-20
FT3701-20
INFRARED THERMOMETER
Instruction Manual
September 2013 Revised edition 2 Printed in Japan
FT3700A981-02 13-09H
Safety
Mishandling this instrument during use could result in
injury or death, as well as damage to the instrument. Be
certain that you understand the instructions and precau-
tions in the manual before use. We disclaim any respon-
sibility for accidents or injuries not resulting directly
from instrument defects.
In the manual, the symbol indicates particularly important infor-
mation that the user should read before using the instrument.
Indicates warnings relating to the laser.
WEEE marking:
This symbol indicates that the electrical and electronic appli-
ance is put on the EU market after August 13, 2005, and pro-
ducers of the Member States are required to display it on the
appliance under Article 11.2 of Directive 2002/96/EC (WEEE).
This symbol indicates that the product conforms to safety reg-
ulations set out by the EC Directive.
Indicates that incorrect operation presents an extreme haz-
ard that could result in serious injury or death to the user.
Indicates that incorrect operation presents a significant haz-
ard that could result in serious injury or death to the user.
Indicates that incorrect operation presents a possibility of
injury to the user or damage to the device.
Indicates advisory items related to performance or correct
operation of the instrument.
Usage Notes
Do not allow the laser light beam to impinge upon any
gas which can explode.
• Use of controls or adjustments or performance of proce-
dures other than thosespecified herein may result in hazard-
ous radiation exposure.
•TheModelFT3700-20, FT3701-20 uses as a light source a
semiconductorlaserwhichemits visiblelight,andwhichcon-
forms to IEC standard class 2 (IEC 60825-1). (Wavelength
640 nm to 660 nm, maximum power output 1 mW)
Since there is considerable danger of this laser light causing
damage to the eyes, be very careful not to direct this laser
light into your eyes or those of another person.
• Do not look directly into the laser light from the optical system.
• When measuring the temperature of an object which has a
mirror finish, be careful not to allow the laser light beam to be
reflected off the surface into your eyes or those of another
person.
• This instrument should be installed and operated indoors on-
ly, between 0 and 50°C and 80% RH or less.
• Do not store or use theinstrument where it could be exposed
to direct sunlight, high temperature or humidity, or conden-
sation. Under such conditions, the instrument may be dam-
aged and insulation may deteriorate so that it no longer
meets specifications.
• This instrument is not designed to be entirely water- or dust-
proof. Do not use it in an especially dusty environment, nor
where it might be splashed with liquid. This may cause damage.
• Do not use the instrument where it may be exposed to corrosive
or combustible gases. The instrument may be damaged.
• Do not use the instrument
near a source of strong electro-
magnetic radiation, or near a highly electrically charged ob-
ject. These may cause a malfunction.
• To avoid damage to the instrument, protect it from physical
shock when transporting and handling. Be especially careful
to avoid physical shock from dropping.
• Do not point the lens at the sun or at any other source of
strong light. If you do, the sensor may be damaged.
• Do not contact the lens against the object whose tempera-
ture is to be measured, or get it dirty, allow it to be scratched,
or allow any foreign material to adhere to it. Doing so may
cause errors.
The indicator flashes when the remaining battery capacity
is low. In this case, the instrument's reliability is not guaranteed.
Replace the battery immediately.
Replacing Batteries
When replacing the batteries, be careful not to acciden-
tally pull the measuring trigger key. This may cause the
laser marker to enter the eyes and is extremely danger-
ous. After replacing the batteries, be sure to close the
cover before using the instrument.
• Battery may explode if mistreated. Do not short-circuit,
recharge, disassemble or dispose of in fire.
• Handle and dispose of battery in accordance with local
regulations.
• Do not mix old and new batteries, or different types of batter-
ies. Also, be careful to observe battery polarity during instal-
lation. Otherwise, poor performance or damage from battery
leakage could result.
• To avoid corrosion and damage to this instrument from bat-
tery leakage, remove the batteries from the instrument if it is
to be stored for a long time.
The battery cover has been designed to fit tightly in order pre-
vent accidental opening.
1. Hold the instrument with both hands as
shown in the diagram.
2. Twist the battery cover in the direction as
shown in the diagram to open it.
3. Take out the batteries.
4. Install new batteries (LR03) in the case,
being careful to observe proper battery
polarity.
5. Close the battery cover.
Battery cover
Remaining battery life indicator
There is ample battery life remaining.
Replace the batteries soon.
No battery life remaining. The instru-
ment cannot be used in this state.
Names and Function of Parts
2
1
34
5
67
8
8
9
10
LCD Display
1. Indicates the lit setting for laser marker. (When this lamp is off,
the laser maker beam is not emitted)
This lamp will blink when the laser marker beam is being emitted
during lit setting.
2. Indicates the backlight setting. (When this lamp is off, the laser
maker beam is not emitted)
3. "HI" indicates that the alarm setting's upper limit temperature
has been exceeded. "LO" indicates that the reading is lower
than the lower limit temperature.
4. Indicates that measurement is in progress.
5. Indicates the battery consumption level (refer to Replacing
Battery)
6. Main display: Indicates the measurement value.
7. Sub-display: Indicates the mode and associated value.
8. Indicates the temperature units.
9. Indicates that the measurement value is being maintained.
10. Indicates that continuous measurement mode is active.
143
2
7
6
5
1234
Warranty
Warranty malfunctions occurring under conditions of normal use in con-
formity with the Instruction Manual and Product Precautionary Mark-
ings will be repaired free of charge. This warranty is valid for a period
of one (1) year from the date of purchase. Please contact the distribu-
tor from which you purchased the product for further information on
warranty provisions.
Introduction
Thank you for purchasing the HIOKI “Model FT3700-20,
FT3701-20 INFRARED THERMOMETER.” To obtain maximum
performance from the instrument, please read this manual first,
and keep it handy for future reference.
The Model FT3700-20, FT3701-20 is a non-contact thermome-
ter using infrared rays.
It can measure the surface temperature of an object by measur-
ing the energy level of the infrared rays emitted from the object
without touching it.
• Liquid crystal display with backlight
• Two-point Laser marker beams
• Thermal emissivity setting function
• Display and sound alarm functions
Initial Inspection
When you receive the instrument, inspect it carefully to ensure
that no damage occurred during shipping. In particular, check
the accessories, the liquid crystal display, the control keys, and
the lens. If damage is evident, or if it fails to operate according to
the specifications, contact your dealer or HIOKI representative.
Maintenance and Service
• To clean the instrument, wipe it gently with a soft cloth moistened with
water or mild detergent. Never use solvents such as benzene, alcohol,
acetone, ether, ketones, thinners or gasoline, as they can deform and
discolor the case.
• If the instrument seems to be malfunctioning, confirm that the batteries
are not discharged before contacting your dealer or HIOKI representative.
• Pack the instrument so that it will not sustain damage during shipping,
and include a description of existing damage. We do not take any
responsibility for damage incurred during shipping.
This manual contains information and warnings essential for safe opera-
tion of the instrument and for maintaining it in safe operating condition.
Before using it, be sure to carefully read the following safety precautions.
Safety Symbol
Symbols for Various Standards
The following symbols in this manual indicate the relative importance
of cautions and warnings.
Follow these precautions to ensure safe operation and to obtain the full
benefits of the various functions.
Preliminary Checks
Before using the instrument the first time, verify that it operates normal-
ly to ensure that the no damage occurred during storage or shipping.
If you find any damage, contact your dealer or HIOKI representative.
1. LCD Display
2. MODE Key
Changes the instrument's mode (see "Changing the Mode").
3. Down/°C/ °F Key
Press one time: Changes (decreases) the setting.
Press and hold while pulling the measurement trigger (1 sec.):
Toggles the laser marker on and off.
Change temperature units (except when using the emissivity
setting, HAL mode, or LAL mode).
4. Up/LOCK Key
Press one time: Changes (increases) the setting.
Turns continuous measurement mode on and off
(except when using the emissivity setting, HAL
mode, or LAL mode).
Press and hold while pulling the measurement trigger (1 sec.):
Toggles the backlight on and off.
5. Meas. Key
Pull the trigger to switch on the power to start measuring.
6. Infrared Lens
Infrared rays from the object whose temperature is to be measured
are received here.
7. Laser
The laser marker beams are emitted from here.
8. Battery cover
Overview
Inspection and Maintenance
FT3700-20
FT3701-20
INFRARED THERMOMETER
Instruction Manual
September 2013 Revised edition 2 Printed in Japan
FT3700A981-02 13-09H
Safety
Mishandling this instrument during use could result in
injury or death, as well as damage to the instrument. Be
certain that you understand the instructions and precau-
tions in the manual before use. We disclaim any respon-
sibility for accidents or injuries not resulting directly
from instrument defects.
In the manual, the symbol indicates particularly important infor-
mation that the user should read before using the instrument.
Indicates warnings relating to the laser.
WEEE marking:
This symbol indicates that the electrical and electronic appli-
ance is put on the EU market after August 13, 2005, and pro-
ducers of the Member States are required to display it on the
appliance under Article 11.2 of Directive 2002/96/EC (WEEE).
This symbol indicates that the product conforms to safety reg-
ulations set out by the EC Directive.
Indicates that incorrect operation presents an extreme haz-
ard that could result in serious injury or death to the user.
Indicates that incorrect operation presents a significant haz-
ard that could result in serious injury or death to the user.
Indicates that incorrect operation presents a possibility of
injury to the user or damage to the device.
Indicates advisory items related to performance or correct
operation of the instrument.
Usage Notes
Do not allow the laser light beam to impinge upon any
gas which can explode.
• Use of controls or adjustments or performance of proce-
dures other than thosespecified herein may result in hazard-
ous radiation exposure.
•TheModelFT3700-20, FT3701-20 uses as a light source a
semiconductorlaserwhichemits visiblelight,andwhichcon-
forms to IEC standard class 2 (IEC 60825-1). (Wavelength
640 nm to 660 nm, maximum power output 1 mW)
Since there is considerable danger of this laser light causing
damage to the eyes, be very careful not to direct this laser
light into your eyes or those of another person.
• Do not look directly into the laser light from the optical system.
• When measuring the temperature of an object which has a
mirror finish, be careful not to allow the laser light beam to be
reflected off the surface into your eyes or those of another
person.
• This instrument should be installed and operated indoors on-
ly, between 0 and 50°C and 80% RH or less.
• Do not store or use theinstrument where it could be exposed
to direct sunlight, high temperature or humidity, or conden-
sation. Under such conditions, the instrument may be dam-
aged and insulation may deteriorate so that it no longer
meets specifications.
• This instrument is not designed to be entirely water- or dust-
proof. Do not use it in an especially dusty environment, nor
where it might be splashed with liquid. This may cause damage.
• Do not use the instrument where it may be exposed to corrosive
or combustible gases. The instrument may be damaged.
• Do not use the instrument
near a source of strong electro-
magnetic radiation, or near a highly electrically charged ob-
ject. These may cause a malfunction.
• To avoid damage to the instrument, protect it from physical
shock when transporting and handling. Be especially careful
to avoid physical shock from dropping.
• Do not point the lens at the sun or at any other source of
strong light. If you do, the sensor may be damaged.
• Do not contact the lens against the object whose tempera-
ture is to be measured, or get it dirty, allow it to be scratched,
or allow any foreign material to adhere to it. Doing so may
cause errors.
The indicator flashes when the remaining battery capacity
is low. In this case, the instrument's reliability is not guaranteed.
Replace the battery immediately.
Replacing Batteries
When replacing the batteries, be careful not to acciden-
tally pull the measuring trigger key. This may cause the
laser marker to enter the eyes and is extremely danger-
ous. After replacing the batteries, be sure to close the
cover before using the instrument.
• Battery may explode if mistreated. Do not short-circuit,
recharge, disassemble or dispose of in fire.
• Handle and dispose of battery in accordance with local
regulations.
• Do not mix old and new batteries, or different types of batter-
ies. Also, be careful to observe battery polarity during instal-
lation. Otherwise, poor performance or damage from battery
leakage could result.
• To avoid corrosion and damage to this instrument from bat-
tery leakage, remove the batteries from the instrument if it is
to be stored for a long time.
The battery cover has been designed to fit tightly in order pre-
vent accidental opening.
1. Hold the instrument with both hands as
shown in the diagram.
2. Twist the battery cover in the direction as
shown in the diagram to open it.
3. Take out the batteries.
4. Install new batteries (LR03) in the case,
being careful to observe proper battery
polarity.
5. Close the battery cover.
Battery cover
Remaining battery life indicator
There is ample battery life remaining.
Replace the batteries soon.
No battery life remaining. The instru-
ment cannot be used in this state.
Names and Function of Parts
2
1
34
5
67
8
8
9
10
LCD Display
1. Indicates the lit setting for laser marker. (When this lamp is off,
the laser maker beam is not emitted)
This lamp will blink when the laser marker beam is being emitted
during lit setting.
2. Indicates the backlight setting. (When this lamp is off, the laser
maker beam is not emitted)
3. "HI" indicates that the alarm setting's upper limit temperature
has been exceeded. "LO" indicates that the reading is lower
than the lower limit temperature.
4. Indicates that measurement is in progress.
5. Indicates the battery consumption level (refer to Replacing
Battery)
6. Main display: Indicates the measurement value.
7. Sub-display: Indicates the mode and associated value.
8. Indicates the temperature units.
9. Indicates that the measurement value is being maintained.
10. Indicates that continuous measurement mode is active.
143
2
7
6
5
1234
Warranty
Warranty malfunctions occurring under conditions of normal use in con-
formity with the Instruction Manual and Product Precautionary Mark-
ings will be repaired free of charge. This warranty is valid for a period
of one (1) year from the date of purchase. Please contact the distribu-
tor from which you purchased the product for further information on
warranty provisions.
Introduction
Thank you for purchasing the HIOKI “Model FT3700-20,
FT3701-20 INFRARED THERMOMETER.” To obtain maximum
performance from the instrument, please read this manual first,
and keep it handy for future reference.
The Model FT3700-20, FT3701-20 is a non-contact thermome-
ter using infrared rays.
It can measure the surface temperature of an object by measur-
ing the energy level of the infrared rays emitted from the object
without touching it.
• Liquid crystal display with backlight
• Two-point Laser marker beams
• Thermal emissivity setting function
• Display and sound alarm functions
Initial Inspection
When you receive the instrument, inspect it carefully to ensure
that no damage occurred during shipping. In particular, check
the accessories, the liquid crystal display, the control keys, and
the lens. If damage is evident, or if it fails to operate according to
the specifications, contact your dealer or HIOKI representative.
Maintenance and Service
• To clean the instrument, wipe it gently with a soft cloth moistened with
water or mild detergent. Never use solvents such as benzene, alcohol,
acetone, ether, ketones, thinners or gasoline, as they can deform and
discolor the case.
• If the instrument seems to be malfunctioning, confirm that the batteries
are not discharged before contacting your dealer or HIOKI representative.
• Pack the instrument so that it will not sustain damage during shipping,
and include a description of existing damage. We do not take any
responsibility for damage incurred during shipping.
This manual contains information and warnings essential for safe opera-
tion of the instrument and for maintaining it in safe operating condition.
Before using it, be sure to carefully read the following safety precautions.
Safety Symbol
Symbols for Various Standards
The following symbols in this manual indicate the relative importance
of cautions and warnings.
Follow these precautions to ensure safe operation and to obtain the full
benefits of the various functions.
Preliminary Checks
Before using the instrument the first time, verify that it operates normal-
ly to ensure that the no damage occurred during storage or shipping.
If you find any damage, contact your dealer or HIOKI representative.
1. LCD Display
2. MODE Key
Changes the instrument's mode (see "Changing the Mode").
3. Down/°C/ °F Key
Press one time: Changes (decreases) the setting.
Press and hold while pulling the measurement trigger (1 sec.):
Toggles the laser marker on and off.
Change temperature units (except when using the emissivity
setting, HAL mode, or LAL mode).
4. Up/LOCK Key
Press one time: Changes (increases) the setting.
Turns continuous measurement mode on and off
(except when using the emissivity setting, HAL
mode, or LAL mode).
Press and hold while pulling the measurement trigger (1 sec.):
Toggles the backlight on and off.
5. Meas. Key
Pull the trigger to switch on the power to start measuring.
6. Infrared Lens
Infrared rays from the object whose temperature is to be measured
are received here.
7. Laser
The laser marker beams are emitted from here.
8. Battery cover
Overview
Inspection and Maintenance
FT3700-20
FT3701-20
INFRARED THERMOMETER
Instruction Manual
September 2013 Revised edition 2 Printed in Japan
FT3700A981-02 13-09H
Safety
Mishandling this instrument during use could result in
injury or death, as well as damage to the instrument. Be
certain that you understand the instructions and precau-
tions in the manual before use. We disclaim any respon-
sibility for accidents or injuries not resulting directly
from instrument defects.
In the manual, the symbol indicates particularly important infor-
mation that the user should read before using the instrument.
Indicates warnings relating to the laser.
WEEE marking:
This symbol indicates that the electrical and electronic appli-
ance is put on the EU market after August 13, 2005, and pro-
ducers of the Member States are required to display it on the
appliance under Article 11.2 of Directive 2002/96/EC (WEEE).
This symbol indicates that the product conforms to safety reg-
ulations set out by the EC Directive.
Indicates that incorrect operation presents an extreme haz-
ard that could result in serious injury or death to the user.
Indicates that incorrect operation presents a significant haz-
ard that could result in serious injury or death to the user.
Indicates that incorrect operation presents a possibility of
injury to the user or damage to the device.
Indicates advisory items related to performance or correct
operation of the instrument.
Usage Notes
Do not allow the laser light beam to impinge upon any
gas which can explode.
• Use of controls or adjustments or performance of proce-
dures other than thosespecified herein may result in hazard-
ous radiation exposure.
•TheModelFT3700-20, FT3701-20 uses as a light source a
semiconductorlaserwhichemits visiblelight,andwhichcon-
forms to IEC standard class 2 (IEC 60825-1). (Wavelength
640 nm to 660 nm, maximum power output 1 mW)
Since there is considerable danger of this laser light causing
damage to the eyes, be very careful not to direct this laser
light into your eyes or those of another person.
• Do not look directly into the laser light from the optical system.
• When measuring the temperature of an object which has a
mirror finish, be careful not to allow the laser light beam to be
reflected off the surface into your eyes or those of another
person.
• This instrument should be installed and operated indoors on-
ly, between 0 and 50°C and 80% RH or less.
• Do not store or use theinstrument where it could be exposed
to direct sunlight, high temperature or humidity, or conden-
sation. Under such conditions, the instrument may be dam-
aged and insulation may deteriorate so that it no longer
meets specifications.
• This instrument is not designed to be entirely water- or dust-
proof. Do not use it in an especially dusty environment, nor
where it might be splashed with liquid. This may cause damage.
• Do not use the instrument where it may be exposed to corrosive
or combustible gases. The instrument may be damaged.
• Do not use the instrument
near a source of strong electro-
magnetic radiation, or near a highly electrically charged ob-
ject. These may cause a malfunction.
• To avoid damage to the instrument, protect it from physical
shock when transporting and handling. Be especially careful
to avoid physical shock from dropping.
• Do not point the lens at the sun or at any other source of
strong light. If you do, the sensor may be damaged.
• Do not contact the lens against the object whose tempera-
ture is to be measured, or get it dirty, allow it to be scratched,
or allow any foreign material to adhere to it. Doing so may
cause errors.
The indicator flashes when the remaining battery capacity
is low. In this case, the instrument's reliability is not guaranteed.
Replace the battery immediately.
Replacing Batteries
When replacing the batteries, be careful not to acciden-
tally pull the measuring trigger key. This may cause the
laser marker to enter the eyes and is extremely danger-
ous. After replacing the batteries, be sure to close the
cover before using the instrument.
• Battery may explode if mistreated. Do not short-circuit,
recharge, disassemble or dispose of in fire.
• Handle and dispose of battery in accordance with local
regulations.
• Do not mix old and new batteries, or different types of batter-
ies. Also, be careful to observe battery polarity during instal-
lation. Otherwise, poor performance or damage from battery
leakage could result.
• To avoid corrosion and damage to this instrument from bat-
tery leakage, remove the batteries from the instrument if it is
to be stored for a long time.
The battery cover has been designed to fit tightly in order pre-
vent accidental opening.
1. Hold the instrument with both hands as
shown in the diagram.
2. Twist the battery cover in the direction as
shown in the diagram to open it.
3. Take out the batteries.
4. Install new batteries (LR03) in the case,
being careful to observe proper battery
polarity.
5. Close the battery cover.
Battery cover
Remaining battery life indicator
There is ample battery life remaining.
Replace the batteries soon.
No battery life remaining. The instru-
ment cannot be used in this state.
Names and Function of Parts
2
1
34
5
67
8
8
9
10
LCD Display
1. Indicates the lit setting for laser marker. (When this lamp is off,
the laser maker beam is not emitted)
This lamp will blink when the laser marker beam is being emitted
during lit setting.
2. Indicates the backlight setting. (When this lamp is off, the laser
maker beam is not emitted)
3. "HI" indicates that the alarm setting's upper limit temperature
has been exceeded. "LO" indicates that the reading is lower
than the lower limit temperature.
4. Indicates that measurement is in progress.
5. Indicates the battery consumption level (refer to Replacing
Battery)
6. Main display: Indicates the measurement value.
7. Sub-display: Indicates the mode and associated value.
8. Indicates the temperature units.
9. Indicates that the measurement value is being maintained.
10. Indicates that continuous measurement mode is active.
143
2
7
6
5
5678
The laser marker is set to OFF in the factory default or immediately af-
ter replacing the batteries. To turn ON the laser marker, press and hold
the key (1 sec) while pulling the measuring trigger key.
To turn OFF the laser marker is the same operation again.
Pressing the
/LOCK
key while the instrument is on activates continu-
ous measurement mode, except when using the emissivity setting,
HAL mode, or LAL mode. This mode lets you take measurements con-
tinuously without needing to pull the measurement trigger.
Pressing the
MODE
key while the instrument is on causes it to cy-
cle through the following modes:
MAX/MIN/DIF/AVG measurement
The instrument will display the maximum value, minimum value,
difference between the maximum and minimum values, and av-
erage value since measurement began.
• Press the
MODE
key to display "MAX", "MIN", "dIF" or "AVG" on the sub-
display.
• The MAX/MIN/DIF/AVG value will be refreshed when you pull the mea-
surement trigger or while continuous measurement mode is active.
• When using the continuous measurement mode, the key response may
be slow.
The alarm can be set to go off whenever a value which is higher
or lower than a threshold value inputted beforehand is reached.
The alarm is in the form of a display and a buzzer.
Location of labels used in the HIOKI “FT3700-20, FT3701-20 Infrared
Thermometer” is as follows.
Basic Specifications
Electrical characteristics
Accuracy Specifications
Accuracy
rdg. :reading value (The value currently being measured and indicated on the
measuring instrument)
This instrument allows thermal emissivity to be adjusted within
the range of 0.10 to 1.00.Please refer to the following table
when setting the thermal emissivity.
Measurement
Whenever the indication is blinking, the laser marker beam
is being emitted. Exercise extreme care not to allow the laser
marker beam to enter your eyes or those of another person.
Because of this laser light causing damage to the eyes.
• Consecutive measurements are carried out by pulling and holding the
measuring trigger key. Measurement will stop when the measuring
trigger key is released and the last shown value will be retained.
• The instrument will automatically switch off approximately 15 seconds
after the measuring trigger key is released.
• The laser marker indicates the diameter of the measurement field of
view.
• The measurement field of view is defined as the measurement diameter
in which the optical response is 90%. The object whose temperature is to
be measured needs to be larger than the measurement diameter by an
adequate margin. (1.5 to 2 times or more)
ON/OFF setting for laser marker
Continuous measurement mode
• The instrument will turn off automatically about 60 minutes after continu-
ous measurement mode is activated.
• When the laser marker is on, the sighting laser will only activate when
the measurement trigger is pulled.
• Key response may be slow when continuous measurement mode is on.
1. Turning the Power On
With the power switch at OFF, pull the measuring trigger key to switch
on the power to start measuring.
2. Thermal emissivity setting
•Pressthe
MODE
key to activate emissivity mode (“ E " will be
shown on the display).
• Press the keys to set thermal emissivity.
• Refer to the section on thermal emissivity for thermal emissivity setting.
3. Measuring
Direct the lens toward the object whose temperature is to be measured.
Measurement field of view
Model FT3700-20
Model FT3701-20
Changing the Mode
EEmissivity display LAL Alarm lower limit setting
EEmissivity setting HAL Alarm upper limit setting
MAX Maximum value display AVG Average value display
MIN Minimum value display dIF Difference between maxi-
mum and minimum values
Alarm Function
Error Indication
Error Indication
Description Remedy
The change in
ambient tempera-
ture is too great.
Allow the instrument to acclimate to the
ambient temperature for about 30 min-
utes before use.
The ambient tem-
perature is outside
the operating tem-
perature range.
Use the instrument within the operating
temperature range (0°C to 50°C).
to System error
Remove the battery, wait at least 1 min-
ute, and then replace the battery.
If you are unable to resolve the error, the
instrument may be broken. Contact your
dealer or HIOKI representative.
or The measurement
value is outside the
measurement
range.
The measurement value cannot be dis-
played since it is outside the measure-
ment range.
Warning Labels
1. Pull the measuring trigger key to switch on the power.
2. Press the
MODE
key to display "HAL" in the sub-display.
Press the key to set the alarm setting's upper limit temperature.
3. Press the
MODE
key to display "LAL" in the sub-display.
Press the key to set the alarm setting's lower limit temperature.
Specifications
Function Infrared temperature measurement
Additional Function MAX, MIN, DIF (MAX-MIN), AVE measurement,
Alarm function, Backlight function
Power supply LR03 alkaline battery × 2
Dimensions Approx. 48 W × 172 H × 119 D mm
(1.89”W × 6.77”H × 4.69”D)(excluding projections)
Mass Approx. 256 g (9.0 oz.)
(including LR03 alkaline battery × 2)
Location for use Indoors, altitude up to 2000 m (6562-ft.)
Operating temperature
and humidity 0 to 50°C (32°F to 122°F), 80%RH or less (non-
condensation)
Storage temperature
and humidity -10 to 50°C (14°F to 122°F), 80%RH or less (non-
condensation)
50 to 60°C (122°F to 140°F), 70%RH or less (non-
condensation)
Accessories Instruction manual, LR03 alkaline battery × 2,
Carrying case × 1
Effect of radiated radio-fre-
quency electromagnetic field ±70°C at 3 V/m
Applicable standards
EMC : EN61326
Laser: IEC60825-1:1993+A1:1997+A2:2001
CLASS 2 LASER
This product is complied with 21 CFR 1040.10 and
1040.11 except for deviations pursuant to Laser
Notice No.50, dated June 24, 2007
Detection element Thermopile
Temperature units °C, °F
Measurement tempera-
ture range FT3700-20: -60 to 550°C (-76 to 1022°F)
FT3701-20: -60 to 760°C (-76 to 1400°F)
Display resolution 0.1°C, 0.1°F (1°F at 1000°F and over）
Outside display of mea-
surement range
FT3700-20:
"Lo" mark lights when -60.0°C (-76.0°F) or less
"Hi" mark lights when 550.0°C (1022°F) or higher
FT3701-20:
"Lo" mark lights when -60.0°C (-76.0°F) or less
"Hi" mark lights when 760.0°C (1400°F) or higher
Response time 1 second (90%)
Measurement wavelength 8 to 14 m
Thermal emissivity
compensation 0.10 to 1.00 by steps of 0.01
Diameter of field of
measurement FT3700-20: 83 mm at 1000 mm (D:S=12:1)
FT3701-20: 100 mm at 3000 mm (D:S=30:1)
Sighting Two-point laser marker, 1 mW (MAX), Red (640 nm
to 660 nm) It is illuminated in conjunction with pull-
ing the measuring trigger key.
Battery low warning volt-
age mark lights when 2.70 V (±0.1 V) or higher
mark lights when 2.70 V (±0.1 V) or less
mark flashes when 2.55 V (±0.1 V) or less,
measurement value is fixed.
Power turned off at 2.20 V (±0.1 V)
Rated supply voltage 1.5 VDC × 2
Maximum rated powers 150 mVA
Continuous operating time Approx. 140 hours (alkaline battery),
When laser marker and backlight are OFF
Auto Power Off Approx. 15 seconds
Accuracy (infrared) -60.0 to -35.1°C (-76.0 to -31.1°F) Accuracy not
specified
-35.0 to -0.1°C (-31.0 to 31.9°F) ±10%rdg.±2°C
(±(T-32)×0.1±4°F T=reading value(°F))
0.0 to 100.0°C (-32.0 to 212.0°F) ±2°C
100.1 to 500.0°C (212.1 to 932.0°F) ±2%rdg
500.1to 550.0 (932.0 to 1022 °F)(FT3700-20)
500.1to 760.0 (932.0 to 1400 °F)(FT3701-20)
Accuracy not specified
(except when battery mark is blinking)
Guaranteed accuracy
period 1 year
Accuracy guarantee for
temperature and humidity 23°C ±3°C (73°F ±5°F), 80%RH or less (non-con-
densation)
Temperature coefficient Measurement accuracy × 0.1/ °C
Thermal Emissivity
• Variations in the surface condition and color of the object whose temper-
ature is to be measured may cause the thermal emissivity () to be
somewhat different from the values in the above table. If an accurate
temperature measurement is desired for an object whose thermal emis-
sivity is not known, black body tape (commercially available) should be
used. In this case the setting for thermal emissivity () should be the
value indicated on black body tape.
• Iron and other objects with low thermal emissivity reflect their surround-
ing temperature, causing inaccuracies in measurement. The black body
tape (commercially available) is also recommended when measuring
these objects of low thermal emissivity.
• A black body is an object that represents a standard emissivity, and may
not necessarily be black in color.
Refractory & Building Materials
Alumina (coarse grain) 0.45
Alumina (fine grain) 0.25
Asbestos 0.95
Carbon (graphite) 0.75
Carbon (soot) 0.95
Carborundum(Trademark) 0.85
Concrete 0.7
Fire clay 0.75
Marble 0.90
Plaster 0.90
Quartz (rough) 0.90
Red brick (rough) 0.75 to 0.90
Silica (coarse grain) 0.55
Silica (fine grain) 0.40
Timber (various) 0.80 to 0.90
Zirconium silicate at 850°C
0.60
Zirconium silicate up to
500°C 0.85
Miscellaneous
Aluminum lacquer 0.50
Enamel (any color) 0.90
Lacquer 0.90
Matte black paint 0.95 to 0.98
Oil paint (any color) 0.95
Paper and cardboard
0.90
Plastics 0.80 to 0.95
Plastics films
(0.05 mm thick) 0.50 to 0.95
Polythene film
(0.03 mm thick) 0.20 to 0.30
Rubber (rough) 0.98
Rubber (smooth) 0.90
Silicone polish 0.70
Water 0.98
Metal
Aluminum
(heavily oxidized) 0.25
Aluminum Alloys various 0.10 to 0.25
Aluminum oxide at 260°C 0.60
Aluminum oxide at 800°C 0.30
Brass (oxidized) 0.60
Brass (polished) 0.10
Brass (roughened surface)
0.20
Cast iron (polished) 0.20
Cast iron (rough) rusted 0.95
Cast iron (turned at 100°C)
0.45
Cast iron
(turned at 1000°C) 0.60 to 0.70
Copper (oxidized) 0.80
Copper (polished) 0.05
Iron plate(rusted) 0.70 to 0.85
Lead (oxidized at 25°C) 0.30
Lead (oxidized at 200°C)
0.60
Lead (pure) 0.10
Mild steel 0.30 to 0.50
Molten cast iron 0.30
Molten copper 0.15
Nichrome 0.70
Nichrome (oxidized) 0.95
Nickel (pure) 0.10
Nickel plate (oxidized)
0.40 to 0.50
Polished aluminum 0.10
Rough ingot iron 0.90
Stainless steel (polished) 0.10
Stainless steel (various) 0.20 to 0.60
Steel 0.60
Steel plate (oxidized) 0.90
5678
The laser marker is set to OFF in the factory default or immediately af-
ter replacing the batteries. To turn ON the laser marker, press and hold
the key (1 sec) while pulling the measuring trigger key.
To turn OFF the laser marker is the same operation again.
Pressing the
/LOCK
key while the instrument is on activates continu-
ous measurement mode, except when using the emissivity setting,
HAL mode, or LAL mode. This mode lets you take measurements con-
tinuously without needing to pull the measurement trigger.
Pressing the
MODE
key while the instrument is on causes it to cy-
cle through the following modes:
MAX/MIN/DIF/AVG measurement
The instrument will display the maximum value, minimum value,
difference between the maximum and minimum values, and av-
erage value since measurement began.
• Press the
MODE
key to display "MAX", "MIN", "dIF" or "AVG" on the sub-
display.
• The MAX/MIN/DIF/AVG value will be refreshed when you pull the mea-
surement trigger or while continuous measurement mode is active.
• When using the continuous measurement mode, the key response may
be slow.
The alarm can be set to go off whenever a value which is higher
or lower than a threshold value inputted beforehand is reached.
The alarm is in the form of a display and a buzzer.
Location of labels used in the HIOKI “FT3700-20, FT3701-20 Infrared
Thermometer” is as follows.
Basic Specifications
Electrical characteristics
Accuracy Specifications
Accuracy
rdg. :reading value (The value currently being measured and indicated on the
measuring instrument)
This instrument allows thermal emissivity to be adjusted within
the range of 0.10 to 1.00.Please refer to the following table
when setting the thermal emissivity.
Measurement
Whenever the indication is blinking, the laser marker beam
is being emitted. Exercise extreme care not to allow the laser
marker beam to enter your eyes or those of another person.
Because of this laser light causing damage to the eyes.
• Consecutive measurements are carried out by pulling and holding the
measuring trigger key. Measurement will stop when the measuring
trigger key is released and the last shown value will be retained.
• The instrument will automatically switch off approximately 15 seconds
after the measuring trigger key is released.
• The laser marker indicates the diameter of the measurement field of
view.
• The measurement field of view is defined as the measurement diameter
in which the optical response is 90%. The object whose temperature is to
be measured needs to be larger than the measurement diameter by an
adequate margin. (1.5 to 2 times or more)
ON/OFF setting for laser marker
Continuous measurement mode
• The instrument will turn off automatically about 60 minutes after continu-
ous measurement mode is activated.
• When the laser marker is on, the sighting laser will only activate when
the measurement trigger is pulled.
• Key response may be slow when continuous measurement mode is on.
1. Turning the Power On
With the power switch at OFF, pull the measuring trigger key to switch
on the power to start measuring.
2. Thermal emissivity setting
•Pressthe
MODE
key to activate emissivity mode (“ E " will be
shown on the display).
• Press the keys to set thermal emissivity.
• Refer to the section on thermal emissivity for thermal emissivity setting.
3. Measuring
Direct the lens toward the object whose temperature is to be measured.
Measurement field of view
Model FT3700-20
Model FT3701-20
Changing the Mode
EEmissivity display LAL Alarm lower limit setting
EEmissivity setting HAL Alarm upper limit setting
MAX Maximum value display AVG Average value display
MIN Minimum value display dIF Difference between maxi-
mum and minimum values
Alarm Function
Error Indication
Error Indication
Description Remedy
The change in
ambient tempera-
ture is too great.
Allow the instrument to acclimate to the
ambient temperature for about 30 min-
utes before use.
The ambient tem-
perature is outside
the operating tem-
perature range.
Use the instrument within the operating
temperature range (0°C to 50°C).
to System error
Remove the battery, wait at least 1 min-
ute, and then replace the battery.
If you are unable to resolve the error, the
instrument may be broken. Contact your
dealer or HIOKI representative.
or The measurement
value is outside the
measurement
range.
The measurement value cannot be dis-
played since it is outside the measure-
ment range.
Warning Labels
1. Pull the measuring trigger key to switch on the power.
2. Press the
MODE
key to display "HAL" in the sub-display.
Press the key to set the alarm setting's upper limit temperature.
3. Press the
MODE
key to display "LAL" in the sub-display.
Press the key to set the alarm setting's lower limit temperature.
Specifications
Function Infrared temperature measurement
Additional Function MAX, MIN, DIF (MAX-MIN), AVE measurement,
Alarm function, Backlight function
Power supply LR03 alkaline battery × 2
Dimensions Approx. 48 W × 172 H × 119 D mm
(1.89”W × 6.77”H × 4.69”D)(excluding projections)
Mass Approx. 256 g (9.0 oz.)
(including LR03 alkaline battery × 2)
Location for use Indoors, altitude up to 2000 m (6562-ft.)
Operating temperature
and humidity 0 to 50°C (32°F to 122°F), 80%RH or less (non-
condensation)
Storage temperature
and humidity -10 to 50°C (14°F to 122°F), 80%RH or less (non-
condensation)
50 to 60°C (122°F to 140°F), 70%RH or less (non-
condensation)
Accessories Instruction manual, LR03 alkaline battery × 2,
Carrying case × 1
Effect of radiated radio-fre-
quency electromagnetic field ±70°C at 3 V/m
Applicable standards
EMC : EN61326
Laser: IEC60825-1:1993+A1:1997+A2:2001
CLASS 2 LASER
This product is complied with 21 CFR 1040.10 and
1040.11 except for deviations pursuant to Laser
Notice No.50, dated June 24, 2007
Detection element Thermopile
Temperature units °C, °F
Measurement tempera-
ture range FT3700-20: -60 to 550°C (-76 to 1022°F)
FT3701-20: -60 to 760°C (-76 to 1400°F)
Display resolution 0.1°C, 0.1°F (1°F at 1000°F and over）
Outside display of mea-
surement range
FT3700-20:
"Lo" mark lights when -60.0°C (-76.0°F) or less
"Hi" mark lights when 550.0°C (1022°F) or higher
FT3701-20:
"Lo" mark lights when -60.0°C (-76.0°F) or less
"Hi" mark lights when 760.0°C (1400°F) or higher
Response time 1 second (90%)
Measurement wavelength 8 to 14 m
Thermal emissivity
compensation 0.10 to 1.00 by steps of 0.01
Diameter of field of
measurement FT3700-20: 83 mm at 1000 mm (D:S=12:1)
FT3701-20: 100 mm at 3000 mm (D:S=30:1)
Sighting Two-point laser marker, 1 mW (MAX), Red (640 nm
to 660 nm) It is illuminated in conjunction with pull-
ing the measuring trigger key.
Battery low warning volt-
age mark lights when 2.70 V (±0.1 V) or higher
mark lights when 2.70 V (±0.1 V) or less
mark flashes when 2.55 V (±0.1 V) or less,
measurement value is fixed.
Power turned off at 2.20 V (±0.1 V)
Rated supply voltage 1.5 VDC × 2
Maximum rated powers 150 mVA
Continuous operating time Approx. 140 hours (alkaline battery),
When laser marker and backlight are OFF
Auto Power Off Approx. 15 seconds
Accuracy (infrared) -60.0 to -35.1°C (-76.0 to -31.1°F) Accuracy not
specified
-35.0 to -0.1°C (-31.0 to 31.9°F) ±10%rdg.±2°C
(±(T-32)×0.1±4°F T=reading value(°F))
0.0 to 100.0°C (-32.0 to 212.0°F) ±2°C
100.1 to 500.0°C (212.1 to 932.0°F) ±2%rdg
500.1to 550.0 (932.0 to 1022 °F)(FT3700-20)
500.1to 760.0 (932.0 to 1400 °F)(FT3701-20)
Accuracy not specified
(except when battery mark is blinking)
Guaranteed accuracy
period 1 year
Accuracy guarantee for
temperature and humidity 23°C ±3°C (73°F ±5°F), 80%RH or less (non-con-
densation)
Temperature coefficient Measurement accuracy × 0.1/ °C
Thermal Emissivity
• Variations in the surface condition and color of the object whose temper-
ature is to be measured may cause the thermal emissivity () to be
somewhat different from the values in the above table. If an accurate
temperature measurement is desired for an object whose thermal emis-
sivity is not known, black body tape (commercially available) should be
used. In this case the setting for thermal emissivity () should be the
value indicated on black body tape.
• Iron and other objects with low thermal emissivity reflect their surround-
ing temperature, causing inaccuracies in measurement. The black body
tape (commercially available) is also recommended when measuring
these objects of low thermal emissivity.
• A black body is an object that represents a standard emissivity, and may
not necessarily be black in color.
Refractory & Building Materials
Alumina (coarse grain) 0.45
Alumina (fine grain) 0.25
Asbestos 0.95
Carbon (graphite) 0.75
Carbon (soot) 0.95
Carborundum(Trademark) 0.85
Concrete 0.7
Fire clay 0.75
Marble 0.90
Plaster 0.90
Quartz (rough) 0.90
Red brick (rough) 0.75 to 0.90
Silica (coarse grain) 0.55
Silica (fine grain) 0.40
Timber (various) 0.80 to 0.90
Zirconium silicate at 850°C
0.60
Zirconium silicate up to
500°C 0.85
Miscellaneous
Aluminum lacquer 0.50
Enamel (any color) 0.90
Lacquer 0.90
Matte black paint 0.95 to 0.98
Oil paint (any color) 0.95
Paper and cardboard
0.90
Plastics 0.80 to 0.95
Plastics films
(0.05 mm thick) 0.50 to 0.95
Polythene film
(0.03 mm thick) 0.20 to 0.30
Rubber (rough) 0.98
Rubber (smooth) 0.90
Silicone polish 0.70
Water 0.98
Metal
Aluminum
(heavily oxidized) 0.25
Aluminum Alloys various 0.10 to 0.25
Aluminum oxide at 260°C 0.60
Aluminum oxide at 800°C 0.30
Brass (oxidized) 0.60
Brass (polished) 0.10
Brass (roughened surface)
0.20
Cast iron (polished) 0.20
Cast iron (rough) rusted 0.95
Cast iron (turned at 100°C)
0.45
Cast iron
(turned at 1000°C) 0.60 to 0.70
Copper (oxidized) 0.80
Copper (polished) 0.05
Iron plate(rusted) 0.70 to 0.85
Lead (oxidized at 25°C) 0.30
Lead (oxidized at 200°C)
0.60
Lead (pure) 0.10
Mild steel 0.30 to 0.50
Molten cast iron 0.30
Molten copper 0.15
Nichrome 0.70
Nichrome (oxidized) 0.95
Nickel (pure) 0.10
Nickel plate (oxidized)
0.40 to 0.50
Polished aluminum 0.10
Rough ingot iron 0.90
Stainless steel (polished) 0.10
Stainless steel (various) 0.20 to 0.60
Steel 0.60
Steel plate (oxidized) 0.90
5678
The laser marker is set to OFF in the factory default or immediately af-
ter replacing the batteries. To turn ON the laser marker, press and hold
the key (1 sec) while pulling the measuring trigger key.
To turn OFF the laser marker is the same operation again.
Pressing the
/LOCK
key while the instrument is on activates continu-
ous measurement mode, except when using the emissivity setting,
HAL mode, or LAL mode. This mode lets you take measurements con-
tinuously without needing to pull the measurement trigger.
Pressing the
MODE
key while the instrument is on causes it to cy-
cle through the following modes:
MAX/MIN/DIF/AVG measurement
The instrument will display the maximum value, minimum value,
difference between the maximum and minimum values, and av-
erage value since measurement began.
• Press the
MODE
key to display "MAX", "MIN", "dIF" or "AVG" on the sub-
display.
• The MAX/MIN/DIF/AVG value will be refreshed when you pull the mea-
surement trigger or while continuous measurement mode is active.
• When using the continuous measurement mode, the key response may
be slow.
The alarm can be set to go off whenever a value which is higher
or lower than a threshold value inputted beforehand is reached.
The alarm is in the form of a display and a buzzer.
Location of labels used in the HIOKI “FT3700-20, FT3701-20 Infrared
Thermometer” is as follows.
Basic Specifications
Electrical characteristics
Accuracy Specifications
Accuracy
rdg. :reading value (The value currently being measured and indicated on the
measuring instrument)
This instrument allows thermal emissivity to be adjusted within
the range of 0.10 to 1.00.Please refer to the following table
when setting the thermal emissivity.
Measurement
Whenever the indication is blinking, the laser marker beam
is being emitted. Exercise extreme care not to allow the laser
marker beam to enter your eyes or those of another person.
Because of this laser light causing damage to the eyes.
• Consecutive measurements are carried out by pulling and holding the
measuring trigger key. Measurement will stop when the measuring
trigger key is released and the last shown value will be retained.
• The instrument will automatically switch off approximately 15 seconds
after the measuring trigger key is released.
• The laser marker indicates the diameter of the measurement field of
view.
• The measurement field of view is defined as the measurement diameter
in which the optical response is 90%. The object whose temperature is to
be measured needs to be larger than the measurement diameter by an
adequate margin. (1.5 to 2 times or more)
ON/OFF setting for laser marker
Continuous measurement mode
• The instrument will turn off automatically about 60 minutes after continu-
ous measurement mode is activated.
• When the laser marker is on, the sighting laser will only activate when
the measurement trigger is pulled.
• Key response may be slow when continuous measurement mode is on.
1. Turning the Power On
With the power switch at OFF, pull the measuring trigger key to switch
on the power to start measuring.
2. Thermal emissivity setting
•Pressthe
MODE
key to activate emissivity mode (“ E " will be
shown on the display).
• Press the keys to set thermal emissivity.
• Refer to the section on thermal emissivity for thermal emissivity setting.
3. Measuring
Direct the lens toward the object whose temperature is to be measured.
Measurement field of view
Model FT3700-20
Model FT3701-20
Changing the Mode
EEmissivity display LAL Alarm lower limit setting
EEmissivity setting HAL Alarm upper limit setting
MAX Maximum value display AVG Average value display
MIN Minimum value display dIF Difference between maxi-
mum and minimum values
Alarm Function
Error Indication
Error Indication
Description Remedy
The change in
ambient tempera-
ture is too great.
Allow the instrument to acclimate to the
ambient temperature for about 30 min-
utes before use.
The ambient tem-
perature is outside
the operating tem-
perature range.
Use the instrument within the operating
temperature range (0°C to 50°C).
to System error
Remove the battery, wait at least 1 min-
ute, and then replace the battery.
If you are unable to resolve the error, the
instrument may be broken. Contact your
dealer or HIOKI representative.
or The measurement
value is outside the
measurement
range.
The measurement value cannot be dis-
played since it is outside the measure-
ment range.
Warning Labels
1. Pull the measuring trigger key to switch on the power.
2. Press the
MODE
key to display "HAL" in the sub-display.
Press the key to set the alarm setting's upper limit temperature.
3. Press the
MODE
key to display "LAL" in the sub-display.
Press the key to set the alarm setting's lower limit temperature.
Specifications
Function Infrared temperature measurement
Additional Function MAX, MIN, DIF (MAX-MIN), AVE measurement,
Alarm function, Backlight function
Power supply LR03 alkaline battery × 2
Dimensions Approx. 48 W × 172 H × 119 D mm
(1.89”W × 6.77”H × 4.69”D)(excluding projections)
Mass Approx. 256 g (9.0 oz.)
(including LR03 alkaline battery × 2)
Location for use Indoors, altitude up to 2000 m (6562-ft.)
Operating temperature
and humidity 0 to 50°C (32°F to 122°F), 80%RH or less (non-
condensation)
Storage temperature
and humidity -10 to 50°C (14°F to 122°F), 80%RH or less (non-
condensation)
50 to 60°C (122°F to 140°F), 70%RH or less (non-
condensation)
Accessories Instruction manual, LR03 alkaline battery × 2,
Carrying case × 1
Effect of radiated radio-fre-
quency electromagnetic field ±70°C at 3 V/m
Applicable standards
EMC : EN61326
Laser: IEC60825-1:1993+A1:1997+A2:2001
CLASS 2 LASER
This product is complied with 21 CFR 1040.10 and
1040.11 except for deviations pursuant to Laser
Notice No.50, dated June 24, 2007
Detection element Thermopile
Temperature units °C, °F
Measurement tempera-
ture range FT3700-20: -60 to 550°C (-76 to 1022°F)
FT3701-20: -60 to 760°C (-76 to 1400°F)
Display resolution 0.1°C, 0.1°F (1°F at 1000°F and over）
Outside display of mea-
surement range
FT3700-20:
"Lo" mark lights when -60.0°C (-76.0°F) or less
"Hi" mark lights when 550.0°C (1022°F) or higher
FT3701-20:
"Lo" mark lights when -60.0°C (-76.0°F) or less
"Hi" mark lights when 760.0°C (1400°F) or higher
Response time 1 second (90%)
Measurement wavelength 8 to 14 m
Thermal emissivity
compensation 0.10 to 1.00 by steps of 0.01
Diameter of field of
measurement FT3700-20: 83 mm at 1000 mm (D:S=12:1)
FT3701-20: 100 mm at 3000 mm (D:S=30:1)
Sighting Two-point laser marker, 1 mW (MAX), Red (640 nm
to 660 nm) It is illuminated in conjunction with pull-
ing the measuring trigger key.
Battery low warning volt-
age mark lights when 2.70 V (±0.1 V) or higher
mark lights when 2.70 V (±0.1 V) or less
mark flashes when 2.55 V (±0.1 V) or less,
measurement value is fixed.
Power turned off at 2.20 V (±0.1 V)
Rated supply voltage 1.5 VDC × 2
Maximum rated powers 150 mVA
Continuous operating time Approx. 140 hours (alkaline battery),
When laser marker and backlight are OFF
Auto Power Off Approx. 15 seconds
Accuracy (infrared) -60.0 to -35.1°C (-76.0 to -31.1°F) Accuracy not
specified
-35.0 to -0.1°C (-31.0 to 31.9°F) ±10%rdg.±2°C
(±(T-32)×0.1±4°F T=reading value(°F))
0.0 to 100.0°C (-32.0 to 212.0°F) ±2°C
100.1 to 500.0°C (212.1 to 932.0°F) ±2%rdg
500.1to 550.0 (932.0 to 1022 °F)(FT3700-20)
500.1to 760.0 (932.0 to 1400 °F)(FT3701-20)
Accuracy not specified
(except when battery mark is blinking)
Guaranteed accuracy
period 1 year
Accuracy guarantee for
temperature and humidity 23°C ±3°C (73°F ±5°F), 80%RH or less (non-con-
densation)
Temperature coefficient Measurement accuracy × 0.1/ °C
Thermal Emissivity
• Variations in the surface condition and color of the object whose temper-
ature is to be measured may cause the thermal emissivity () to be
somewhat different from the values in the above table. If an accurate
temperature measurement is desired for an object whose thermal emis-
sivity is not known, black body tape (commercially available) should be
used. In this case the setting for thermal emissivity () should be the
value indicated on black body tape.
• Iron and other objects with low thermal emissivity reflect their surround-
ing temperature, causing inaccuracies in measurement. The black body
tape (commercially available) is also recommended when measuring
these objects of low thermal emissivity.
• A black body is an object that represents a standard emissivity, and may
not necessarily be black in color.
Refractory & Building Materials
Alumina (coarse grain) 0.45
Alumina (fine grain) 0.25
Asbestos 0.95
Carbon (graphite) 0.75
Carbon (soot) 0.95
Carborundum(Trademark) 0.85
Concrete 0.7
Fire clay 0.75
Marble 0.90
Plaster 0.90
Quartz (rough) 0.90
Red brick (rough) 0.75 to 0.90
Silica (coarse grain) 0.55
Silica (fine grain) 0.40
Timber (various) 0.80 to 0.90
Zirconium silicate at 850°C
0.60
Zirconium silicate up to
500°C 0.85
Miscellaneous
Aluminum lacquer 0.50
Enamel (any color) 0.90
Lacquer 0.90
Matte black paint 0.95 to 0.98
Oil paint (any color) 0.95
Paper and cardboard
0.90
Plastics 0.80 to 0.95
Plastics films
(0.05 mm thick) 0.50 to 0.95
Polythene film
(0.03 mm thick) 0.20 to 0.30
Rubber (rough) 0.98
Rubber (smooth) 0.90
Silicone polish 0.70
Water 0.98
Metal
Aluminum
(heavily oxidized) 0.25
Aluminum Alloys various 0.10 to 0.25
Aluminum oxide at 260°C 0.60
Aluminum oxide at 800°C 0.30
Brass (oxidized) 0.60
Brass (polished) 0.10
Brass (roughened surface)
0.20
Cast iron (polished) 0.20
Cast iron (rough) rusted 0.95
Cast iron (turned at 100°C)
0.45
Cast iron
(turned at 1000°C) 0.60 to 0.70
Copper (oxidized) 0.80
Copper (polished) 0.05
Iron plate(rusted) 0.70 to 0.85
Lead (oxidized at 25°C) 0.30
Lead (oxidized at 200°C)
0.60
Lead (pure) 0.10
Mild steel 0.30 to 0.50
Molten cast iron 0.30
Molten copper 0.15
Nichrome 0.70
Nichrome (oxidized) 0.95
Nickel (pure) 0.10
Nickel plate (oxidized)
0.40 to 0.50
Polished aluminum 0.10
Rough ingot iron 0.90
Stainless steel (polished) 0.10
Stainless steel (various) 0.20 to 0.60
Steel 0.60
Steel plate (oxidized) 0.90
5678
The laser marker is set to OFF in the factory default or immediately af-
ter replacing the batteries. To turn ON the laser marker, press and hold
the key (1 sec) while pulling the measuring trigger key.
To turn OFF the laser marker is the same operation again.
Pressing the
/LOCK
key while the instrument is on activates continu-
ous measurement mode, except when using the emissivity setting,
HAL mode, or LAL mode. This mode lets you take measurements con-
tinuously without needing to pull the measurement trigger.
Pressing the
MODE
key while the instrument is on causes it to cy-
cle through the following modes:
MAX/MIN/DIF/AVG measurement
The instrument will display the maximum value, minimum value,
difference between the maximum and minimum values, and av-
erage value since measurement began.
• Press the
MODE
key to display "MAX", "MIN", "dIF" or "AVG" on the sub-
display.
• The MAX/MIN/DIF/AVG value will be refreshed when you pull the mea-
surement trigger or while continuous measurement mode is active.
• When using the continuous measurement mode, the key response may
be slow.
The alarm can be set to go off whenever a value which is higher
or lower than a threshold value inputted beforehand is reached.
The alarm is in the form of a display and a buzzer.
Location of labels used in the HIOKI “FT3700-20, FT3701-20 Infrared
Thermometer” is as follows.
Basic Specifications
Electrical characteristics
Accuracy Specifications
Accuracy
rdg. :reading value (The value currently being measured and indicated on the
measuring instrument)
This instrument allows thermal emissivity to be adjusted within
the range of 0.10 to 1.00.Please refer to the following table
when setting the thermal emissivity.
Measurement
Whenever the indication is blinking, the laser marker beam
is being emitted. Exercise extreme care not to allow the laser
marker beam to enter your eyes or those of another person.
Because of this laser light causing damage to the eyes.
• Consecutive measurements are carried out by pulling and holding the
measuring trigger key. Measurement will stop when the measuring
trigger key is released and the last shown value will be retained.
• The instrument will automatically switch off approximately 15 seconds
after the measuring trigger key is released.
• The laser marker indicates the diameter of the measurement field of
view.
• The measurement field of view is defined as the measurement diameter
in which the optical response is 90%. The object whose temperature is to
be measured needs to be larger than the measurement diameter by an
adequate margin. (1.5 to 2 times or more)
ON/OFF setting for laser marker
Continuous measurement mode
• The instrument will turn off automatically about 60 minutes after continu-
ous measurement mode is activated.
• When the laser marker is on, the sighting laser will only activate when
the measurement trigger is pulled.
• Key response may be slow when continuous measurement mode is on.
1. Turning the Power On
With the power switch at OFF, pull the measuring trigger key to switch
on the power to start measuring.
2. Thermal emissivity setting
•Pressthe
MODE
key to activate emissivity mode (“ E " will be
shown on the display).
• Press the keys to set thermal emissivity.
• Refer to the section on thermal emissivity for thermal emissivity setting.
3. Measuring
Direct the lens toward the object whose temperature is to be measured.
Measurement field of view
Model FT3700-20
Model FT3701-20
Changing the Mode
EEmissivity display LAL Alarm lower limit setting
EEmissivity setting HAL Alarm upper limit setting
MAX Maximum value display AVG Average value display
MIN Minimum value display dIF Difference between maxi-
mum and minimum values
Alarm Function
Error Indication
Error Indication
Description Remedy
The change in
ambient tempera-
ture is too great.
Allow the instrument to acclimate to the
ambient temperature for about 30 min-
utes before use.
The ambient tem-
perature is outside
the operating tem-
perature range.
Use the instrument within the operating
temperature range (0°C to 50°C).
to System error
Remove the battery, wait at least 1 min-
ute, and then replace the battery.
If you are unable to resolve the error, the
instrument may be broken. Contact your
dealer or HIOKI representative.
or The measurement
value is outside the
measurement
range.
The measurement value cannot be dis-
played since it is outside the measure-
ment range.
Warning Labels
1. Pull the measuring trigger key to switch on the power.
2. Press the
MODE
key to display "HAL" in the sub-display.
Press the key to set the alarm setting's upper limit temperature.
3. Press the
MODE
key to display "LAL" in the sub-display.
Press the key to set the alarm setting's lower limit temperature.
Specifications
Function Infrared temperature measurement
Additional Function MAX, MIN, DIF (MAX-MIN), AVE measurement,
Alarm function, Backlight function
Power supply LR03 alkaline battery × 2
Dimensions Approx. 48 W × 172 H × 119 D mm
(1.89”W × 6.77”H × 4.69”D)(excluding projections)
Mass Approx. 256 g (9.0 oz.)
(including LR03 alkaline battery × 2)
Location for use Indoors, altitude up to 2000 m (6562-ft.)
Operating temperature
and humidity 0 to 50°C (32°F to 122°F), 80%RH or less (non-
condensation)
Storage temperature
and humidity -10 to 50°C (14°F to 122°F), 80%RH or less (non-
condensation)
50 to 60°C (122°F to 140°F), 70%RH or less (non-
condensation)
Accessories Instruction manual, LR03 alkaline battery × 2,
Carrying case × 1
Effect of radiated radio-fre-
quency electromagnetic field ±70°C at 3 V/m
Applicable standards
EMC : EN61326
Laser: IEC60825-1:1993+A1:1997+A2:2001
CLASS 2 LASER
This product is complied with 21 CFR 1040.10 and
1040.11 except for deviations pursuant to Laser
Notice No.50, dated June 24, 2007
Detection element Thermopile
Temperature units °C, °F
Measurement tempera-
ture range FT3700-20: -60 to 550°C (-76 to 1022°F)
FT3701-20: -60 to 760°C (-76 to 1400°F)
Display resolution 0.1°C, 0.1°F (1°F at 1000°F and over）
Outside display of mea-
surement range
FT3700-20:
"Lo" mark lights when -60.0°C (-76.0°F) or less
"Hi" mark lights when 550.0°C (1022°F) or higher
FT3701-20:
"Lo" mark lights when -60.0°C (-76.0°F) or less
"Hi" mark lights when 760.0°C (1400°F) or higher
Response time 1 second (90%)
Measurement wavelength 8 to 14 m
Thermal emissivity
compensation 0.10 to 1.00 by steps of 0.01
Diameter of field of
measurement FT3700-20: 83 mm at 1000 mm (D:S=12:1)
FT3701-20: 100 mm at 3000 mm (D:S=30:1)
Sighting Two-point laser marker, 1 mW (MAX), Red (640 nm
to 660 nm) It is illuminated in conjunction with pull-
ing the measuring trigger key.
Battery low warning volt-
age mark lights when 2.70 V (±0.1 V) or higher
mark lights when 2.70 V (±0.1 V) or less
mark flashes when 2.55 V (±0.1 V) or less,
measurement value is fixed.
Power turned off at 2.20 V (±0.1 V)
Rated supply voltage 1.5 VDC × 2
Maximum rated powers 150 mVA
Continuous operating time Approx. 140 hours (alkaline battery),
When laser marker and backlight are OFF
Auto Power Off Approx. 15 seconds
Accuracy (infrared) -60.0 to -35.1°C (-76.0 to -31.1°F) Accuracy not
specified
-35.0 to -0.1°C (-31.0 to 31.9°F) ±10%rdg.±2°C
(±(T-32)×0.1±4°F T=reading value(°F))
0.0 to 100.0°C (-32.0 to 212.0°F) ±2°C
100.1 to 500.0°C (212.1 to 932.0°F) ±2%rdg
500.1to 550.0 (932.0 to 1022 °F)(FT3700-20)
500.1to 760.0 (932.0 to 1400 °F)(FT3701-20)
Accuracy not specified
(except when battery mark is blinking)
Guaranteed accuracy
period 1 year
Accuracy guarantee for
temperature and humidity 23°C ±3°C (73°F ±5°F), 80%RH or less (non-con-
densation)
Temperature coefficient Measurement accuracy × 0.1/ °C
Thermal Emissivity
• Variations in the surface condition and color of the object whose temper-
ature is to be measured may cause the thermal emissivity () to be
somewhat different from the values in the above table. If an accurate
temperature measurement is desired for an object whose thermal emis-
sivity is not known, black body tape (commercially available) should be
used. In this case the setting for thermal emissivity () should be the
value indicated on black body tape.
• Iron and other objects with low thermal emissivity reflect their surround-
ing temperature, causing inaccuracies in measurement. The black body
tape (commercially available) is also recommended when measuring
these objects of low thermal emissivity.
• A black body is an object that represents a standard emissivity, and may
not necessarily be black in color.
Refractory & Building Materials
Alumina (coarse grain) 0.45
Alumina (fine grain) 0.25
Asbestos 0.95
Carbon (graphite) 0.75
Carbon (soot) 0.95
Carborundum(Trademark) 0.85
Concrete 0.7
Fire clay 0.75
Marble 0.90
Plaster 0.90
Quartz (rough) 0.90
Red brick (rough) 0.75 to 0.90
Silica (coarse grain) 0.55
Silica (fine grain) 0.40
Timber (various) 0.80 to 0.90
Zirconium silicate at 850°C
0.60
Zirconium silicate up to
500°C 0.85
Miscellaneous
Aluminum lacquer 0.50
Enamel (any color) 0.90
Lacquer 0.90
Matte black paint 0.95 to 0.98
Oil paint (any color) 0.95
Paper and cardboard
0.90
Plastics 0.80 to 0.95
Plastics films
(0.05 mm thick) 0.50 to 0.95
Polythene film
(0.03 mm thick) 0.20 to 0.30
Rubber (rough) 0.98
Rubber (smooth) 0.90
Silicone polish 0.70
Water 0.98
Metal
Aluminum
(heavily oxidized) 0.25
Aluminum Alloys various 0.10 to 0.25
Aluminum oxide at 260°C 0.60
Aluminum oxide at 800°C 0.30
Brass (oxidized) 0.60
Brass (polished) 0.10
Brass (roughened surface)
0.20
Cast iron (polished) 0.20
Cast iron (rough) rusted 0.95
Cast iron (turned at 100°C)
0.45
Cast iron
(turned at 1000°C) 0.60 to 0.70
Copper (oxidized) 0.80
Copper (polished) 0.05
Iron plate(rusted) 0.70 to 0.85
Lead (oxidized at 25°C) 0.30
Lead (oxidized at 200°C)
0.60
Lead (pure) 0.10
Mild steel 0.30 to 0.50
Molten cast iron 0.30
Molten copper 0.15
Nichrome 0.70
Nichrome (oxidized) 0.95
Nickel (pure) 0.10
Nickel plate (oxidized)
0.40 to 0.50
Polished aluminum 0.10
Rough ingot iron 0.90
Stainless steel (polished) 0.10
Stainless steel (various) 0.20 to 0.60
Steel 0.60
Steel plate (oxidized) 0.90
Other manuals for FT3700-20
1
Table of contents
Other Hioki Thermometer manuals
