SATO KEIRYOKI SK-8700 User manual

Instruction Manual
No.8260-00 Infrared Thermometer
Model SK-8700
3-4, Kanda-kajicho, Chiyoda-ku, Tokyo 101-0045 Japan
https://www.sksato.co.jp/en/
M.07

1
Introduction
Thank you for purchasing the Infrared Thermometer Model SK-8700.
The SK-8700 is conforming to the Assessment for the Japanese Consumer Law on laser
equipment and carries “PSC” mark.
This product is designed to measure temperature using a non-contact method. Do not use it for
other purposes. Read this manual thoroughly before using the SK-8700II. Keep the manual in a
safe place for future references whenever necessary.
WARNING
Beware of explosion!
The SK-8700 is not explosion-proof. Never use it in an atmosphere containing flammable gases.
Beware of laser marker!
Do not look into the laser marker or point it at anybody's eyes. Doing so may damage your eyes.
Keep the unit out of reach of children. (Laser class II)
If you have any questions, contact us or the dealer from which the unit was purchased.
Notes on Use
Be sure to observe the following precautions in order to use this unit correctly.
Be careful of the following when the laser marker is active.
Do not stare into the laser marker.
Do not point the laser marker at anybody.
Keep the unit out of reach of children.
Do not use this unit as a clinical thermometer.
This is a non-contact thermometer. Do not let the unit touch the object to be measured. If the
unit touches a hot object, it may result in measurement errors or failure.
Never disassemble or modify this unit. Doing so may result in failure.
Do not drop this unit or apply vibration/impact to it. This unit is a precision instrument.
Do not use this unit in a place exposed to direct sunlight or near heating equipment.
Doing so may result in measurement errors or deformation/discoloring of the casing.
This thermometer is designed for use in the ambient temperature range of 0 to 50°C at 80% RH
or less. Using the unit outside the specified range will result in failure.
Do not use this unit in a dusty environment. The accuracy of measurement is affected by dust
or dirt on the lens. Always wipe off dust and dirt after each use. For details, refer to
"Maintenance".

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Do not touch the measurement window with a sharp or hard object. Doing so may damage the
lens, causing loss of measurement accuracy.
Do not use this unit in an environment where electrical noise is generated. Doing so may result
in unstable display or larger errors.Also, do not bring the unit close to a charged object.
Never allow the unit to become wet, as it is not waterproof.
If this unit is not going to be used for a long time, always remove the battery from the unit.
Otherwise, the battery may leak fluid, resulting in failure.
Do not dispose of the used battery in a fire.
Keep the battery out of the reach of children. If you have swallowed the battery accidentally,
consult a doctor immediately.
For environmental conservation purposes, dispose of the used battery in compliance with local
rules and regulations.
Do not wash or wipe this unit with alcohol, thinner, or other organic solvents. If the unit
becomes dirty, wipe it with a tightly-wrung gauze or the like that has been dipped in warm water
with neutral detergent.
Do not wipe the temperature measurement section (infrared lens) directly with gauze. For
details, refer to "Maintenance".
Glass does not transmit wavelengths used by this thermometer. Therefore, when an object is
placed beyond glass, this unit detects the temperature of the glass and displays its temperature
reading.
If the ambient temperature fluctuates excessively, the measurement accuracy may be affected.
Wait for a while for the unit to properly adapt to the ambient temperature. For a change of
temperature of 10ºC or more, wait for at least 30 minutes before measurement.
Overview
The SK-8700is a non-contact type infrared thermometer, which detects the infrared energy emitted
from an object and converts it into a temperature reading. The product can measure the
temperature of the surface instantly without touching the object.
Features
Measures surface temperature instantly:
The advantage of the non-contact infrared method is quick-response measurement, and the
single-hand-held unit allows easy operation.
Non-contact, clean measurement:
Ideal for food processing industries where clean and hygienic measurement is required.
Easily visible measurement spot:
With the laser marker set on, a laser sighting is output so that you can instantly identify the spot
being measured.

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LCD with backlighting:
The backlit LCD facilitates reading even in dark places.
Auto power-off function:
The power will be turned off automatically if the unit is not operated for approximately five
seconds, thus conserving battery power if you forget to turn the power off.
Wide range of temperature:
A wide range of temperatures from -20 to 420°C (0 to 786°F)
Auto Hold function:
A measured value of temperature is automatically held (fixed) for approximately five seconds.
Lens cap:
Prevents dust or foreign matter from entering the measurement window (infrared radiation
sensing section). Also, it protects users from viewing the laser in case the laser marker is
activated accidentally.
Vinyl cover
Protects the unit when dropped and keeps out dirt or dust during storage.

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1. Names and Functions of Components
1-1 Main unit
①Temperature measurement (infrared radiation sensing) section:
Detects the infrared energy emitted from the object.
②Laser sighting section
Pressing the measurement key and the laser marker key simultaneously activates laser
sighting.
③Battery lid: Houses a 9-V battery 6F22 (006P).
④Hand strap: Used this strap through your wrist. Lens cap is attached.
⑤Lens cap
Used to protect the lens from dust or foreign matter in the measurement window. Also, it
protects users from viewing the laser in case the laser marker is activated accidentally.
⑥LCD: Displays the temperature reading and other related information.
⑦Measurement key:Activates temperature measurement.
⑧Backlight ON/OFF key: Sets the backlight function on or off.
⑨Laser marker ON/OFF key: Sets the laser marker function on or off.
⑩°C/°F key
By pressing this °C/°F key, temperature unit changes from °C/°F key Centigrade to Fahrenheit
or from Fahrenheit to Centigrade
NB. When the power is turned on, temperature is displayed in the unit that was set before the
power was turned off by auto-power functions

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1-2 LCD
⑪7-segment display: Displays the temperature reading.
⑫Laser sighting mark: Lit while laser marker is activated.
⑬Unit of measurement: Temperature is displayed in Centigrade.
⑭Unit of measurement: Temperature is displayed in Fahrenheit.
⑮Low-battery mark: Lit when battery power is insufficient. When this mark lights, replace the
battery.
1-3 Label
The label is based on the Japanese Consumer Law on laser
equipment (JIS C 6802)
2. Loading the Battery
①Remove the battery lid.
②Check both polarities (+/-) of the battery
snap fastener and 9-V battery 6F22 (006P)
before inserting the battery in place.
③Reinstall the battery lid.
Caution
•Replace the battery immediately when the low-battery mark on the LCD lights.
Measurements while the low-battery mark is lit may affect the accuracy, possibly resulting
in malfunction of the thermometer.
•When the low-battery mark lights warning that the battery power is insufficient, replace the
battery with a new one as described in "Loading the Battery" above.
•The battery is a factory set for testing. So the battery life may be shortened.

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3. Putting Vinyl cover onto the Thermometer
It is recommended to use the thermometer with the vinyl cover attached. The vinyl cover will help
absorb shock in case the unit is dropped accidentally, and protect the unit from becoming dirty
during use. The thermometer is shipped in a vinyl cover.
1) Hold the opening of the vinyl cover wide when inserting the unit.
2) Fix the snap fastener (button) on the vinyl cover to secure the unit.
* When removing, take off the lens cap first from the hand strap. Be careful not to lose it.
4. Setting the Laser Marker
1) While pressing the measurement key, press the laser marker ON/OFF key simultaneously to
set the laser marker ON or OFF.
2) When the laser marker is ON, press the measurement
key to active the laser marker. At this time is
displayed on LCD. When the setting is OFF, the
laser marker is not active even if the measurement key
is pressed.
Note: While the laser marker is on, the battery will be consumed faster.
* Positional relation between distance and sighting point
This is a one-point laser sighting thermometer. The laser mark is sighted approximately 14 mm
above the center of the spot.
(When the distance is approximately 225 mm)
Laser marker sighting point
Measurement spot (circle of diameter 28 mm)
When the measurement distance is approximately 225 mm, the laser marker is output aiming
at the point illustrated above. Refer to the figure as a guide.
Caution
Do not look into the laser marker or point it at anybody's eyes. Doing so may
damage your eyes.
Do not let the children use the infrared thermometer
* Standard for Safe Use of Laser Products (JIS C6802): "Class II" is defined as follows:
A visible light (of wavelengths in the visible region: 400 nm through 700 nm) with an output
level (approx. 1mW or less) that is normally regarded harmless with respect to humans'
physical defense capabilities.

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5. Setting the Backlight
While the power is on, press the backlight ON/OFF key to set the backlight on or off.
While the backlight key is on, the LCD is illuminated in green so that the value displayed on the
LCD can be easily read even in dark places. While the backlight key is off, the backlight is not lit.
Note: While the backlight is on, the battery will be consumed faster.
6. Emissivity
The emissivity of this thermometer is fixed at 0.95.
Infrared radiation is naturally emitted from all objects, but the emissivity value depends on the type
of object to be measured. However, various objects including food and plastic have been shown to
have an emissivity of 0.95, so emissivity of 0.95 can be used for measuring the temperatures of
such objects by this thermometer.
Emissivity Table
The table below lists the typical emissivity of different types of materials. (The values are
presented only for reference; the emissivity varies with the temperature and surface conditions of
objects.)
Object
Emissivity
Object
Emissivity
Object
Emissivity
Meat
0.98
Grains
0.98
Skin
0.97
Fish
0.98
Oil
0.98
Water
0.98
Vegetable
0.98
Plastic
0.95
Soil
0.95
Bread
0.98
Rubber
0.95
Wood
0.98
Confectionery
0.98
Concrete
0.95
Paper
0.92
7. How to measure
1) Take off the lens cap from the measurement window first.
2) Prior to measurement, set both the laser marker and backlight.
3) Direct the thermometer at an object and press the measurement key.
The measured temperature is displayed on the LCD.
NB.: Infrared rays in this measurement wavelength range do not penetrate glasses. When
measuring the object through the glass, it detects the surface temperature of the glass.
4) Release the measurement key. The displayed value can be held for approximately five
seconds.
5) After five seconds, the power is automatically turned off (auto power-off function).
6) When the measurement is finished, put the lens cap on the measurement window.

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8. Notes on Measurement
8-1 Measurement Spot Size
The measurement spot size of this thermometer changes in accordance with the distance
as shown.
The diameter of the measuring spot shown above is defined on the basis of the area that receives
90% or more of the energy. The D:S ratio, which is the ratio of the distance between the object and
the thermometer to the size of the spot, is preset at 8:1 (D = measuring distance, S = diameter of
spot). For example, for the distance of 200 mm, a spot circle of diameter 25 mm can be measured.
If the object is too small, make the distance smaller by bringing the thermometer closer to the
object. For higher accuracy, make sure that the area of the object is at least twice as large as the
spot being measured.
Note:If the area of the object is much larger than the spot size, the accuracy of measurement is
affected. Also, if the area of the object is much smaller than the spot size, the accuracy of
measurement may be affected by inclusion of a part that is not supposed to be measured.
If the measuring distance is less than 120 mm, the accuracy of measurement is affected.
8-2 Cautions on High-temperature Measurement
Operating the thermometer continuously to measure a high-temperature (200°C or more) object at
a short distance (30 mm or less) for a long time (three minutes or more) may cause a drop in the
performance of the infrared lens. When measuring a hot object of 200°C or more, the distance
should be 30 mm or more and operation should be completed within a short time.
There is also the risk of burning your hand by accidental contact with an excessively hot object.
Secure a safe distance from the object if the object is known to be hot.
Note: Never measure an object whose temperature is outside the allowable temperature range.
D Distance
S Diameter

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8-3 Measurement of an object with an emissivity other than 0.95
Apply heat-resistant paint or tape that has an emissivity close to 0.95 to the object to be
measured.
Since the emissivity of metals is lower than 0.95, the temperature of a metal surface cannot be
measured with this thermometer. Apply heat-resistant paint or tape as mentioned above before
measuring the temperature.
Measurement accuracy is affected by a frozen surface or dirt on the surface of an object. Wipe
the surface thoroughly so that it is even and homogeneous.
The table below lists materials whose emissivity is significantly different from 0.95. Note that the
emissivity varies with the temperature and surface condition of the object; the values are given for
reference only.
Object
Emissivity
Object
Emissivity
Object
Emissivity
Iron
0.85
Brass
0.60
Ceramic
0.80
Cast iron
0.85
Tile
0.80
Nichrome
0.60
Aluminum
0.30
Asbestos
0.90
Glass
0.85
Copper
0.80
Asphalt
0.85
* Metal is oxidized
9. Maintenance
The accuracy of measurement is affected by dust or dirt on the surface of
the infrared lens. Prevent dirt or dust from adhering to the surface of the
lens during use or storage.
When removing dirt from the infrared lens, use a blower for camera
lenses. If stubborn stains persist, clean the surface of the lens softly with
a swab moistened with lens cleaning liquid.
Note: Never clean the infrared lens with water or detergent. Doing so may affect the performance
of the lens and cause inaccurate measurements.
10. Error Messages
Error message
Cause
Countermeasure
Measuring temperature is
lower than -21°C
The unit cannot measure temperatures
below -20°C. The temperature of the
object must be -20°C or higher.
(Sample)
(figure: 0 to 9)
The element inside the unit
may have been damaged.
Replace the battery and turn the power
ON.
If the error message is still displayed,
contact us or the dealer from which the
product was purchased

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11. Troubleshooting
Refer to the table below when a problem occurs before consulting your dealer for repair.
Problem
Possible Cause
Remedy
Power does not turn on.
Battery power is insufficient.
Replace the battery (6F22 "006P").
See "Replacing the Battery".
If the power does not turn on
even after replacing the
battery, an element inside the
thermometer may have been
damaged.
If the element inside the unit has
been damaged by impact or drop, the
unit must be repaired.
Contact us or the dealer from which
the product was purchased.
Laser marker does not
operate.
Laser marker is off.
Set the laser marker on.
See "Setting the Laser Marker"
Backlight does not light.
Backlight is off.
Set the backlight on.
See "Setting the Backlight".
Temperature reading
is abnormal.
Battery power is insufficient.
Replace the battery (6F22 "006P").
See "Replacing the Battery".
The object is too small or
large for the measurement
spot size
Check the relationship between the
distance and measurement spot size.
See "Measurement Spot Size".
Lens cap is attached on
Check that the lens cap is removed.
Temperature of the object is
fluctuating.
Try measuring the temperature of an
object whose temperature is stable to
check the reading.
Dirt or dust is adhered to the
surface of the infrared lens.
Clean the infrared lens.
See "Maintenance".
Ambient temperature is
fluctuating.
Allow the thermometer to adapt to the
ambient temperature.
See "Notes on Use".
Emissivity of the object is
greatly different from 0.95.
Check the emissivity of the object
with reference to "Measurement of an
object having an emissivity other than
0.95".
If the emissivity is unknown, check it
by applying paint or tape as
described.
There is a high temperature
object near the thermometer
and it is affected by heat.
Shield the heat source with shielding
plates etc.
It is affected by sunlight.
Because the direct sunlight reflects
on the water surface in a sunny day
the correct temperature cannot be
measured

12. Specifications
Cat. No. 8260-00
Model SK-8700
Measuring range -20°C to 420°C / 0 to 786°F
Accuracy ± 2°C at -20°C to 100°C
(at 23°C ± 5°C) ± 2% Reading at 101°C to 420°C
Measuring ambient: at 23°C ± 5°C
Calibrated by Black body emissivity at 0.95
Resolution 1°C / 1°F
Repeatability ± 1°C
Emissivity Fixed at 0.95
Distance to Spot size (D: S) 8:1
Detector Thermopile
Laser sighting 1 point, Class II Laser (use less than 1mW of power)
Wave length 650nm
Spectral response 6 to14μm
Response time 0.5 second
Operating ambient 0 to 50°C, less than 80% of humidity
Storage ambient -20 to 55°C, less than 90%rh (no condensing)
Power requirement One 9V battery (006P)
Power consumption max. 40mA(when Laser and Backlight ON)
Battery life approx. 5 hours (Laser and Backlight ON)
approx. 10 hours (Laser ON and Backlight OFF)
approx. 10 hours (Laser OFF and Backlight ON)
approx. 50 hours (Laser and Backlight OFF)
Dimensions 41.5(W) x 65(D) x 160(H)mm
Weight approx. 140g (with battery)
Materials Main body:ABS resin, Lens cap: polypropylene resin
Functions LCD, Backlight, low-battery mark,Auto-power off
Standard accessories Vinyl cover, Lens cap, 9V battery, Hand strap, Vinyl pouch
Specifications and appearance may subject to change with or without notice