Rosemount P330, Installation And Operation Manual, Page: 50 / 92

Rosemount Model P330 Pressure Validator
5-10
12. Use the pressure pump on the validator to apply pressure to just
below the expected switch operating point.
13. Screw in the fine pressure adjuster until the switch operates. The
contact state is displayed on the screen, and you hear a buzz. The
operating pressure is also displayed.
14. Screw the fine pressure adjuster out to reduce pressure until the
switch releases. The release pressure and hysteresis is displayed.
15. Open the release valve to release system pressure before
disconnecting.
Pressure Switch Test with
Contact Resistance
Measurement
To perform a P-Switch test with contact resistance measurement, refer
to Figure 5-6 and proceed as follows.
NOTE
The electrical connections are the same for both the validator-powered
and externally powered procedure.
The validator displays instructions on screen for running this test, as
shown in Figure 5-7:
FIGURE 5-7. Screen Displays in
P-Switch Contact Resistance Mode.
FIGURE 5-6. (P-SWITCH) Test with
Contact Resistance Measurement
Mode Setup.
P
330
_1
5A
P
3
30
_5
7
A
See Safety Messages on page 5-1 and 5-2 for complete warning information.