Manual

2.2.1 Selecting Engineering Units
1. Turn on the calibrator and select desired pressure range by pressing
the “Range Select” key.
2. For voltage measurements press the “Volts” key.
3. For milliamp measurements or for switch testing press the “mA” key.
Select from mA, %4-20, %10-50 or Switch (for testing pressure
switches).
4. Electrical connections for milliamps are shown in Figures 1 and 2.
2.2.2 Measurement of Pressure from External Sources
IMPORTANT: ALWAYS BE SURE TO USE TEFLON TAPE ON ALL
FITTINGS BEING CONNECTED TO THE MANIFOLD. EVEN AT LOW
PRESSURES LEAKS WILL OCCUR IF TEFLON TAPE IS NOT USED. IT
IS RECOMMENDED THAT THREADS ARE WRAPPED 3 TO 4 TIMES
WITH TAPE TO ENSURE AN AIRTIGHT FIT.
1. Connect the unknown pressure to connection marked P3. Leave “S”
open to atmosphere.
NOTE: Maximum input is 100 psi.
2. Turn selector valve to position P3 and read the pressure on
calibrator.
NOTE: FOR VACUUM GREATER THAN 100 INCHES OF WATER,
CONNECT TO “S” AND LEAVE P3 OPEN TO ATMOSPHERE.
2.2.3 Calibration of Pressure Gauges with Regulated Air from
the DPC
1. Connect AIR SUPPLY to a source of air pressure from 0 to 100 psig.
2. Connect gauge to Pl or P2 with flexible tubing or, if gauge is small
enough and has 1/8-inch NPT male thread, screw gauge directly into
connection block at Pl or P2.
3
Figure 1.
Loop power is supplied by a power
supply in the loop. The Calibrator is
hooked in series with the remainder of
the loop where applicable.
Figure 2.
The DPC supplies power to the
loop. The Calibrator is hooked
in series with the remainder of
the loop where applicable. Use
this hookup to test pressure
switches.