Document P/N:
2A44778_SVC_MNL
Release Date:
07/29/2019
Revision: 1.0
20 of 23
4.3.3 Shunt Calibration
This will set the upper limit of the calibrated input. Flipping the calibration switch on the valve box (shown below) will short the input
straight to 20mA to force a maximum value. Once the
Raw Value
stabilizes around ~20mA, click the
SPAN
button to calibrate the
maximum value scale.
NOTE: ONLY PERFORM SHUNT CALIBRATION WHEN THERE IS ZERO PRESSURE ON THE
LINE. IF SWITCH IS FLIPPED WHEN PRESSURE IS ON THE LINE, THEN THE CURRENT VALUE
WILL BE OVERRIDDEN WITH MAX VALUE AND POP-OFF EVENT WILL OCCUR.
NOTE: IF THE USER CLICKS THE SPAN BUTTON WHEN A VALUE THAT IS NOT CLOSE TO THE
MAXIMUM 20 MA VALUE THEN THE FOLLOWING ERROR DIALOG WILL APPEAR PROMPTING THE
USER TO CORRECT THE ISSUE BEFORE CONTINUING.
THE SPAN BUTTON MUST BE HELD TILL THE VALUE IS AT 20 MA
Calibration Switch
