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g) Refer to the transducer's nameplate to determine the pressure range.
h) For gauge, compound and vacuum transducers, attach the appropriate calibration system and pressure
source to the pressure connection in accordance to the calibration system technical manual. Adjust the
pressure source to 100% of the pressure transducer's range (Figure 6-1, 6-2).
i) For differential pressure transducers, attach the calibration system and pressure source to the high-pressure
connection in accordance to the calibration system technical manual. Vent the low-side pressure port
connection to atmosphere.
j) Adjust the pressure source to 100% of the transducer's range (Figure 6-1).
k) Verify that the transducer output indication is 20.00 + 0.16 mA dc (5.000 + 0.050 V dc for voltage output
option). Perform SPAN adjustments to obtain the transducer's output as specified. SPAN is accomplished
by a screwdriver adjustment of the SPAN potentiometer located under the ZERO/SPAN ACCESS
COVER. See Figure 2-1 for potentiometer access.
l) Repeat steps d. through k. until no further adjustment is required. Should the transducer not calibrate in
the proper manner, refer to paragraph 5-2 Troubleshooting Procedures.
m) Insure that the ZERO/SPAN ACCESS COVER gasket is clean and in place. Rotate the ZERO/SPAN
ACCESS COVER back into position (Figure 2-1) and tighten with the two ZERO/SPAN ACCESS
COVER retaining screws.
To prevent injury, ensure that the pressure is vented from all parts of the calibration
system before disconnecting the hose assemblies.
n) Shut off the nitrogen or air supply and vent all pressures from the system.
o) Shut off power and disconnect the calibration system from the pressure transducer.
6-5
WARNING
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