Product Manual

Isolated Inputs
Switch Test 3
3-5
Switch Test
When in Switch Test mode the Calibrator can sense a contact transition (closed or
opened). At the time of the transition the Calibrator records the value and units shown on
the primary display. This means that a switch test can be done in all modes, read or
source. After two transitions the Calibrator changes to recall mode. In recall mode, the
value of the first transition, second transition, and the calculated deadband of the switch
can be seen on the display. See Figure 3-4 for connections.
100 V PK
MAX
HI
LO
Press and Hold
or Switch Test
Switch Test
Reset
LOOP
HART
PWR
VOLTS
mA
gwp070.eps
Figure 3-4. Swich Test and Pressure Module Connections
1. To go to switch test mode, push and hold  for three seconds.
When in switch test mode, the Calibrator shows the status of the switch contacts,
in this instance, you can see the contact status of a normally open temperature
switch:
gwp036.eps
At the first transition, the switch contact closes:
gwp037.eps