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English
5. OPEN is displayed once the switch is open. Bleed the pump slowly until the
pressure switch closes. The recall icon appears on the display.
6. Press S to read the pressure values for when the switch opened, for when
it closed, and for the deadband
7. Hold S for 3 seconds to reset Switch Test mode; hold any other key for 3
seconds to exit.
Zeroing with Absolute Pressure Modules
To zero, adjust the Calibrator to read a known pressure as follows:
1. Press and hold Z.
2. Press
Z (
a
) to increase or Y ( h)to decrease the Calibrator reading
to equal the applied pressure.
3. Release Z to exit the zeroing procedure.
For all but the 700PA3 module, the known pressure can be barometric, if it is
accurately known. An accurate pressure standard can also apply a pressure within
range for any absolute pressure module. To convert measurement units:
• 1 bar = 750 mmHg (1 mmHg = 0.0013332 bar)
• 1 psi = 2.036 inHg (1 inHg = 0.49115 psi).
Sourcing Loop Voltage
To use the Calibrator to supply loop power (24 V dc) to a current transmitter that
is disconnected from the system:
1. With power off, hold down Uwhile pressing OON.
The LOOP POWER icon appears on the display.
2. With the transmitter disconnected from normal loop power, connect the
Calibrator in series with the instrument current loop as shown in Figure 3.
In addition to mA, the current can be displayed in two alternative modes:
• Percent Mode- The current is displayed as a percentage based on a 4-20 mA
scale.
• Percent Error Mode- Transmitter current output error is displayed. Error is
calculated based on a configurable zero and span pressure and a 4-20 mA
scale.
3. Measure loop current in the mA measurement display.
4. Press O OFF to deactivate the 24 V dc supply when you are done sourcing
loop voltage.
SIGNAL
TEST
+
–
qo007f.eps
Figure 3. Sourcing Connections
1.888.610.7664 sales@GlobalTestSupply.com
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