Crystal nVision Reference Recorder - Switch Test Procedure; Testing Pressure Switches

Page 32 • Crystal Engineering Corporation
Transmitter.Calibration.(Pressure.versus.Voltage)
The nVision is capable of calibrating a pressure transmitter:
1 Modules Required: PM (Pressure) and MA20 (Current &
Voltage).
2 Select the Voltage mode using the Setup button.
3 Change the nVision to the Dual Numerical Screen or
any other preferred screen view.
4 Select the proper pressure units for your nVision using
the Setup menu.
5 Connect the nVision as shown.
6 Vent pressure source and Zero (- - - - -) the nVision
pressure module.
7 Apply pressure prole. Test or record pressure and
voltage readings as required.
8 Before disconnecting the nVision, isolate and vent the
pressure system, disconnect and return to service.
Switch.Test.(Pressure.versus.Switch.Closure)
The nVision is capable of testing a pressure switch :
1 Modules Required: PM (Pressure) and MA20 (Current &
Voltage).
2 Select the Switch Detection mode using the Setup button.
3 Change the nVision to the Switch Test screen view.
4 Select the proper pressure units for your nVision using
the Setup menu.
5 Connect the nVision as shown.
6 Vent pressure source and Zero (- - - - -) the nVision
pressure module.
7 Slowly apply pressure until the switch changes state
(open or closed). Note the displayed value for this state
change.
8 Slowly reduce pressure until the switch changes state
again on the display (open or closed).
9 Before disconnecting the nVision, isolate and vent the
pressure system. Disconnect and return to service.
PRESSURE
is Our
BUSINESS
TM
+
-
VACUUM PRESSURE
PRESSURE
is Our
BUSINESS
TM
+
-
VACUUM PRESSURE