Download Moore 348 FIELDPAC FIELD MOUNTED CONTROLLER

UM348-1
CALIBRATION
3. Perform the following to the input pressure port of the Transmitter:
A. If it is a Absolute Pressure Transmitter sensor, connect a vacuum pump and draw a vacuum down to 0.5
psig minimum.
B. If it is a D/P or Gage Pressure Transmitter sensor, disconnect any pressure tubing from the input port of
the Transmitter, leaving it at atmospheric pressure.
4. Ensure that the 'CAL' lockout switch is in the 'enabled' position. Refer to “Lockout Switches” section and
Figure 5-3 to perform this task, if necessary.
5. Press ENTER/EXIT CONF pushbutton to enter configuration mode at the MENU level.
6. Push the DOWN/ARROW pushbutton to select 'C' (calibration) on left digit position of alphanumeric display.
(If 'CX' appears in the display, the lockout switch on the MPU Controller Board must be enabled, see “Lockout
Switches” section).
7. Press ALARM/STEP DOWN pushbutton to enter FUNCTION BLOCK level.
8. Push the UP/ARROW or DOWN/ARROW pushbutton to select function block number 81 in the right side
digits of alphanumeric display.
9. Press ALARM/STEP DOWN pushbutton to enter PARAMETER level. The alphanumeric display should
show 'CMP' which stands for calibration of mounting position. Use UP/ARROW or DOWN/ARROW
pushbuttons to make this selection if necessary.
10. Press ALARM/STEP DOWN pushbutton to enter VALUE level. The alphanumeric display should show 'CAL
CMP'.
11. Press the TAG/STORE pushbutton to complete the mounting position zero shift calibration. The 'CAL' display
will blink momentarily.
12. Press the ENTER/EXIT CONF pushbutton to leave the configuration mode.
13. Lock out the FIELDPAC's calibration mode via the MPU Controller Board's 'CAL' lockout switch.
This completes the mounting position zero shift calibration procedure.
4.6.2 Pressure Sensor Calibration Verification
The calibration of a Pressure Sensor connected to the FIELDPAC can be verified by the following procedure.
1. Check FIELDPAC's input power requirement. Apply power to the FIELDPAC. Allow the FIELDPAC and its
connected Pressure Transmitter to warm-up for ten minutes before performing the calibration verification. The
ambient temperature should be close to its expected operating temperature.
October 1998
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