15 Electronic Sensor Check
Performing an Electronic Sensor Check
Electronic Sensor Check
A verification module, TSI model 053-923, may be used to check the operation of the QUESTemp
monitor’s wet bulb, dry bulb, and globe. The purpose is to verify that the electronic components
are within a specific range with known values and a known source. The temperature tolerances
should be within ±0.5
o
C.
Example of Verification module
NOTE:
If the sensors are outside of the tolerances, this indicates the sensor alignment should be
serviced off-site for calibration.
Performing an Electronic Sensor Check
1.
Ensure the instrument is reading in Celsius prior to your electronic sensor check.
To change the temperature setting, select
Setup
from the main menu. Then, either
Fahrenheit or Celsius will appear on the screen. When selected, press
I/O enter
key to
switch between settings. For more information, refer to step 3.
2.
Remove the top sensor bar, place to the side, and plug in the verification module into the
center pins of the sensor housing.
3.
Verify the measurement readings on the screen are within ±0.5
C tolerance to the readings
printed on the verification module label. Example below:
a.
Wet Bulb (WB): 11.1
C b. Dry Bulb (DB): 45.3
C
c.
Globe (G): 69.2
C
NOTE:
Relative humidity (RH) is not valid on this instrument.
4.
Once completed, remove verification module and place sensor bar back on the instrument.
(Tighten down the two bolts.) Change the Celsius reading back to Fahrenheit. (Refer to
step 1 a-b.)
Electronic
Sensor Check
