Major tech MT698 User manual

MT698
Professional High Temperature
Infrared Thermometer
Instruction Manual
TABLE OF CONTENTS

2
INTRODUCTION………………………………………3
FEATURES……………………………………………3
WIDERANGEAPPLICATION ………………………….4
SAFETY……………………………………………….4
DISTANCE&SPOTSIZE………………………………..5
SPECIFICATIONS……………………………………..6
FRONTPANELDESCRIPTION…………………………8
INDICATOR……………………………………………8
BUTTONS……………………………………………..9
MEASUREMENTOPERATION………………………..14
BATTERYREPLACEMENT…………………………...15
NOTES……………………………………………….15
MAINTENANCE ……………………………………..18
INTRODUCTION
The IR Thermometer easily measures non-contact (infrared)
temperature. The built-in laser pointer increases target

3
accuracy while the backlight LCD and handy push-buttons
combined are convenient for ergonomic operations.
The Non-contact Infrared Thermometers can be used to
measure the temperature of an object’s surface unlike
traditional (contact) thermometers (measuring a moving
object, the surface with electricity current or objects that
cannot be touched.) Proper use and care of this meter will
provide years of reliable service.
FEATURES:
Rapid detection function
Precise non-contact measurements
Dual laser sighting
Unique flat surface, modern housing design
Automatic Data Hold
Emissivity Digitally adjustable from 0.10 to 1.0
MAX MIN AVG DIF temperature displays
Backlight LCD display
Automatic selection range and Display Resolution
0.1°C (0.1°F)
Trigger lock
Set high and low alarms
Data logger (LOG)
Transmit data to pc with USB.
WIDE RANGE APPLICATION:
Food preparation, Safety and Fire inspectors, Plastic

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molding, Asphalt, Marine and Screen printing, measure ink
and Dryer temperature, HVAC/R, Diesel and Fleet
maintenance.
1. SAFETY
Use with extreme caution when the laser beam is
turned on.
Do not allow the beam contact to eyes.
Do not allow the laser light beam impinge on any
explosive object such as gas.
Distance & Spot Size
As the distance (D) from the object increases, the spot size
(S) of the area measured by the unit becomes larger. The

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relationship between distance and spot size for each unit is
listed below. The focal point for each unit is 914mm (36”).
The spot sizes indicate 90% encircled energy.
D:S=50:1
S
D
25mm@1250mm
1in@50in
12.5mm@625mm
0.5in@25in
2. SPECIFICATIONS
TK Temperature range

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-50 to 1370 °C (-58°F ~ 2498°F)
Accuracy
-50 ~ 1000°C ± 1.5% of reading + 3°C (±5°F)
1000 ~ 1370°C ± 1.5% of reading + 2°C (±3.6°F)
Display resolution 0.1 °C (0.1°F) <1000
1°C (1°F) >1000
Repeatability
-50~1370°C (-58~2498°F): ± 1.5% of reading
IR Temperature range D: S
-50 to 1600 °C (-58°F ~ 2912°F) 50:1
Display resolution 0.1 °C (0.1°F) <1000
1°F >1000
Accuracy for targets:
Assumes ambient operating temperature of 23 to 25 °C
(73 to 77°F)
-50 ~ 20°C (-58°F ~ 68°F) ±2.5°C (4.5°F)
20°C ~400°C (68°F ~752°F) ±1.0% ±1.0°C (1.8°F)
400°C ~800°C (752°F ~ 1472°F) ±1.5%±2.0°C (3.6°F)
800°C ~1600°C (1472°F ~ 2912°F) ±2.5%
Repeatability
-50~20°C (-58~68°F) : ±1.3°C (2.3°F)
20~1200°C (68~2192°F): ±0.8% ±0.5°C (0.9°F)
1200~1600°C (2192~2912°F): ±1.2% ±1.0°C (1.8°F)
Response time 150ms
Spectral response 8~14um

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Emissivity Digitally adjustable from 0.10 to 1.0
Over range indication LCD will show “----”
Polarity Automatic (no indication for positive polarity);
Minus (-) sign for negative polarity
Diode laser output <1mW,Wavelength 630~670nm,
Class(Ⅱ)2 laser product
Operating temp. 0 to 50°C (32 to 122°F)
Storage temp. –10 to 60°C (14 to 140°F)
Relative humidity 10%~90%RH operating,
<80%RH storage
Power supply 9V battery, NEDA 1604A or IEC 6LR61,
or equivalent
Safety “ CE ” Comply with EMC
Note:
Field of View: Make sure that the target is larger than
the unit’s spot size. The smaller the target, the closer
you should be to it. When accuracy is critical, make
sure the target is at least twice as large as the spot
size.

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1. FRONT PANEL DESCRIPTION
①IR sensor
②LCD Display
③TYPE K IN
④USB IN
⑤LIGHT/LASER BUTTON
⑥UP BUTTON
⑦DOWN BUTTON
⑧MODE BUTTON
⑨Measurement Trigger
⑩Battery Cover
⑪Handle Grip
2. INDICATOR
①Measuring indication
②Data hold
③Laser ” on” symbols
④Current temperature value
⑤LOCK symbol
⑥High alarm and
low alarm symbol
⑦MAX, MIN,AVG DIF symbol
⑧Temperature values for the MAX,MIN,DIF AVG
⑨Emissivity value and Type k value
⑩Emissivity symbol and Type k symbol
⑪USB symbol(transmit data to pc)
⑫Low power symbols
⑬°C /°F symbol
1
2
6
5
7
8
9
3
4
23
8
4
15
6
7
9

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⑭Data logger symbol
3. BUTTONS
1) Laser/Backlight on/off button
2) Up button (for EMS,HAL,LAL)
3) Down button (for EMS,HAL,LAL)
4) MODE button (for cycling
through the mode loop)
Functional Design
1. When measuring , press MODE keys to display
MAX value, MIN value, DIF value , AVG value, LOG
value.
2. If the TYPE-K thermocouple is not connected, you can
adjust EMS by pressing up/down key.
3. In the HOLD mode, you can adjust C/F by pressing
up/down key
4. You can turn on/off the backlight/laser by pressing
LIGHT/LASER key at any state.
5. To set values for the High Alarm (HAL), Low Alarm (LAL)
and Emissivity (EMS), press the MODE button until the
appropriate code appears in the display, press the UP
and down buttons to adjust the desired values.
MODE Button Function
In the HOLD mode, Pressing the mode button also allows
you to access the set state, MAX MIN DIF AVG LOG
display, Emissivity(EMS),Lock on/off,HAL on/off, HAL
adjustment, LOW on/off,LOW adjustment,C/F Each time you
press set you advance through the mode cycle. The diagram
shows the sequence of functions in the mode cycle.
3
4
2
1

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MAX MIN DIF AVG display
MAX= maximum . Maximum value of measurement.
MIN= minimum. Minimum value of measurement.
DIF= difference. Difference value of measurement.
AVG= average. Average value of measurement.
Adjustable display by pressing up/down button.
Data Logger
1. Storing Data
Your thermometer is capable of storing up to 100 data
locations.
2. Storing Infrared Data
To store data from an infrared reading, pull the trigger. While
holding the trigger, press the MODE button until LOG
appears in the lower left corner of the display screen; a log
location number will be shown above. If no temperature has
been recorded in the shown LOG location, 4 dashes will
appear in the lower right corner. Aim the unit at the target
area you want to record, and press the laser/backlight button.
The recorded temperature will appear in the lower right
corner. To select another log location, press the up and down
keys.
3.Recalling Data
To recall stored data after the unit shuts off, Press the trigger ,
then press the MODE button until LOG appears in the lower
left corner. A LOG location number will be shown above LOG,
and the stored temperature for that location will be displayed.
Press the UP and Down keys, to move to another LOG

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location.
4.Log Clear Function
The “Log clear” function allows you to clear all logged data
points. This function can only be used when the unit is in
LOG mode. It can be used when the user has any number of
LOG locations stored.
You should only use the LOG clear function if you want to
clear all the Log location data that is stored in unit’s memory.
The “LOG clear” function works as follows:
(1) While in LOG mode, press the trigger, and then press the
“down” arrow button until you reach LOG location “0”.
Note:
This can only be done when the trigger is pulled. LOG
location “0”cannot be accessed, by using the “up” arrow
button.
(2) When LOG location “0” is present on the display, press
the laser/backlight button. You will hear a tone, and the LOG
location will automatically change to “1”, signifying that all
data locations have been cleared.
USB Function
This device affords transmitting the IR and Type K
measurement data to the PC via USB.
Turn on or Shut off USB function:
Under MAX/MIN/DIF/AVG state, press LIGHT/LASER button
until “USB” sign appears in the right lower corner of the LCD.
the USB function will turn on.

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Press the LIGHT/LASER button again until the “USB” sign
disappears to shut the USB function off.
Please refer to the help file in software for details.
MODE
LOW on/off
HAL adjustment
MAX MIN DIF
AVG
C/F
LOW adjustment
EMS adjustment
LOCK on/off
HAL on/off

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EMS adjustment.
The Emissivity(EMS) digitally adjustable from 0.10 to 1.0 by
pressing up/down button.
LOCK on/off.
The lock mode is particularly useful for continuous
monitoring of temperatures. Press the up button or down
button to turn on or off . Press the Measurement Trigger to
confirm the lock measurement mode. The IR Thermometer
will continuously display the temperaure until the
measurement trigger is pressed again.
HAL on/off
HAL= High alarm
Turn on or off high alarm by pressing up/down button.
HAL adjustment
High alarm value adjust.
Please adjust high alarm value by pressing up/down button
LAL on/off
LAL= Low alarm
Turn on or off low alarm by pressing up/down button.
LAL adjustment
low alarm value adjust.
Please adjust low alarm value by pressing up/down button
C/F
pressing up/down button to change the temperature unit(°C
or °F)

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4. MEASUREMENT OPERATION
①Hold the meter by its Handle Grip and point it toward the
surface to be measured.
②Pull and hold the Trigger to turn the meter on and begin
testing. The display will light up if the battery is in good
condition. Replace the battery if the display does not light
up.
③Release the Trigger, the HOLD display icon will appear
on the LCD indicating that the reading is being held. In
HOLD status, press the UP button to turn the laser on or
off. Press the DOWN button to turn the backlight on or
off.
④The meter will automatically power down approximately 7
seconds after the trigger has been released.(Unless the
unit is locked on)
Note: Measurement considerations
Holding the meter by its handle, point the IR Sensor
toward the objects whose temperature you want to
measure. The meter automatically compensates for
temperature deviations from ambient temperature. Keep
in mind that it will take up to 30 minutes to adjust to wide
ambient temperatures that are to be measured, followed
by high temperature measurements, (several minutes)
are required after the low (and before the high)
temperature measurements are made.
This is a result of the cooling process, which must take
place for the IR sensor to work effectively.

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5. BATTERY REPLACEMENT
①If the battery power is
not sufficient, the LCD
will indicate “ ” to
replace the 9V battery.
②Open the battery cover, to remove the
battery from the instrument
and replace it with a new 9-Volt
battery. Place the battery cover back.
6. NOTES:
How it Works
Infrared thermometers measure the surface
temperature of an object. The unit’s optics sense
emitted, reflected, and transmitted energy, which is
collected and focused onto a detector. The unit’s
electronics translate the information into a temperature
reading, which is displayed on the unit. In units with a
laser, the laser is used for aiming purposes only.
Field of View
Make sure that the target is larger than the unit’s spot
size. The smaller the target, the closer you should be to
it. When accuracy is critical, make sure the target is at
least twice as large as the spot size.
Distance & Spot Size
As the distance (D) from the object increases, the spot
size (S) of the area measured by the unit becomes
LOW battery indicator
Open the battery over
9v battery
push this button

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larger. See: Fig: 1.
Locating a hot Spot
To find a hot spot aim the thermometer outside the area
of interest, then scan across with an up and down
motion until you locate the hot spot.
Reminders
①Not recommended for use in measuring shiny or
polished metal surfaces ( stainless steel, aluminum,
etc.).See Emissivity
②The unit cannot measure through transparent surfaces
such as glass. It will measure the surface temperature
of the glass instead.
③Steam, dust, smoke, etc., Can prevent accurate
measurement by obstructing the unit’s optics.
Emissivity
Emissivity is a term used to describe the
energy-emitting characteristics of materials.
Most (90% of typical applications) organic materials
and painted or oxidized surfaces have an emissivity of
0.95 (pre-set in the unit). Inaccurate readings will result
from measuring shiny or polished metal surfaces. To
compensate, cove the surface to be measured with
masking tape or flat black paint.Allow time for the tape
to reach the same temperature as the material
underneath it. Measure the temperature of the tape or
painted surface.
Emissivity Values

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Substance
Thermal
emissivity
Substance
Thermal
emissivity
Asphalt
0.90 to 0.98
Cloth (black)
0.98
Concrete
0.94
Human skin
0.98
Cement
0.96
Lather
0.75 to 0.80
Sand
0.90
Charcoal
(powder)
0.96
Earth
0.92 to 0.96
Lacquer
0.80 to 0.95
Water
0.92 to 0.96
Lacquer
(matt)
0.97
Ice
0.96 to 0.98
Rubber
(black)
0.94
Snow
0.83
Plastic
0.85 to 0.95
Glass
0.90 to 0.95
Timber
0.90
Ceramic
0.90 to 0.94
Paper
0.70 to 0.94
Marble
0.94
Chromium
oxides
0.81
Plaster
0.80 to 0.90
Copper
oxides
0.78
Mortar
0.89 to 0.91
Iron oxides
0.78 to 0.82
Brick
0.93 to 0.96
Textiles
0.90

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7. MAINTENANCE
Repairs or service are not covered in this manual and
should only be carried out by a qualified trained
technician.
To clean the instrument, wipe the body with a dry
cloth. Do not use abrasives or solvents on this
instrument.
For service, use only manufacturer’s specified parts.