SATO SK-110TRH Use and care manual

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SK-110TRH CALIBRATION
To calibrate the thermohygrometer, use a temperature/humidity generating chamber to
produce reference temperature and reference humidity. A chamber capable of achieving a
temperature repeatability within ±0.1°C, humidity repeatability within ±1.0%, and humidity
variability between 0 and 90% is required.
Equipment
• 110TRH
• Temperature/humidity generating chamber
• Reference thermometer
• Torque screwdriver
• Phillips head screwdriver
• Flat head screwdriver
1. Remove the six screws from the device as shown.
2. Remove the front section.
3. Insert four batteries into the case in the directions indicated.
4. Press and hold the POWER key for more than one second to activate the device.
5. Set the sensor in the temperature/humidity generating chamber and allow it to adjust to
the temperature and humidity.
6. Temperature and humidity calibration

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6-1 Temperature calibration
The upper figure of the LCD indicates temperature and the lower figure indicates
humidity. The value is decreased by turning the respective volume control
counterclockwise and increased by turning it clockwise.
(1) Leave at 23°C, 0%, for 30 minutes.
(2) Use a flat head screwdriver to adjust VR1 to 23.0°C.
6.2 Humidity calibration
(1) Leave at 23°C, 60%, for 15 minutes.
(2) Adjust volume control VR4 to 60.0%.
(3) Leave at 23°C, 90% for 15 minutes.
(4) Adjust volume control VR5 to 90.0%.
(5) Leave at 23°C, 0%, for 30 minutes.
(6) Leave at 23°C, 20%, for 12 minutes.
(7) Adjust volume control VR3 to 20.0%.
6.3 Humidity accuracy check
Continued from section 6-2, step 7.
(1) Leave at 23°C, 30%, for 12 minutes.
(2) Check the accuracy at 30%. The acceptable range is within ±2%.
(3) Leave at 23°C, 60%, for 15 minutes.
(4) Check the accuracy at 60%. The acceptable range is within ±2%.
(5) Leave at 23°C, 90%, for 15 minutes.
(6) Check the accuracy at 90%. The acceptable range is within ±2%.
6.4 Application of locking solution
Apply locking solution to VR1, 3, 4, and 5.
Volume control locations
Volume control locations

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7. Replacing the front case
The screws that fasten the two sections of the case together are for plastic.
Tighten the screws in the order shown to a torque of 5 kgf/cm2.