User Manual

Calibration  5
MultiCal Hg/PSI Pressure Module Manual
Fine Zero
inHg
psi
-
Linearity
R1
R12
R15
Coarse Zero
Potentiometer locations.
6 Check the inches of mercury pressure points shown in the following table. Adjust R12 if necessary to bring the readings to within the tolerances shown in
the table.
Readings in mV @ 23°C ±5°C
True Pressure Acceptable Output (mV)
15 inHg 14.975 to 15.025
30 inHg 29.960 to 30.040
250 psi 249.73 to 250.27
500 psi 499.48 to 500.52
7 Set the switch on the MultiCal to the PSI position.
8 Test the MultiCal at the 30 psi point. The reading should be within the tolerance shown in the table above. If not, adjust R15 until both points are within
specication.
9 In the unlikely event that you are unable to adjust the MultiCal so that all of the points meet the tolerances of the table above, contact Customer Service for
assistance. Do not readjust linearity. The linearity adjustment is factory set and should never require readjustment, unless the sensor is replaced.