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Hand
Pump
Pressure Input
Pressure
Module
Isolate the pressure gauge from the process using valves, or by removing
the gauge from the process.
Connect the gauge to the calibrator or reference gauge. For hydraulic
pressure gauges it’s important to remove any gas that might be trapped in
the fluid in the gauge, calibrator, and connections by priming the system.
When generating pressure allow a few moments for stability. Compare the
reading of the gauge under test with the master gauge or calibrator.
For hydraulic pressure gauges it’s important prime the system. This will
remove any gas that might be trapped in the fluid in the gauge, calibrator
or connections.
When generating pressure allow a few moments for the measurement
to stabilize. When using a hydraulic hand pump as a source it can take
several minutes for the pressure to stabilize due to the thermodynamic
effect of fluids.
Compare the reading of the gauge under test with the master
gauge or calibrator.
STEP
1
STEP
2
STEP
3
STEP
4
STEP
5
To perform the test:
Additional resources
For more in depth information about
this application check out these videos
and application notes from Fluke.
TECH
TIPS
•
Safety First! Check all
fittings, adapters and
connecting tubing ratings
for pressures used.
•
Remember to tap analog
gauges at each point due to
friction in mechanical parts.
•
Gas is preferred for
cleanliness requirements
but use caution when
generating pressures above
2,000 psi.
•
Industry standards
usually desire calibration
equipment to be 4-10 times
more accurate than the
device under test.
•
When in the field, connect
pressure gauges through a
manifold or “tee” connector.
•
Use adapter fittings
when workloads require
calibrating a wide variety of
gauges.
•
Consider first, the in-use
orientation of a device and
use an angle adapter at the
bench to achieve similar
orientation.
•
Use a liquid-to-liquid
separator to prevent
contamination in hydraulic
applications.
How to use a deadweight tester
Fluke 719 electric pressure calibrator demonstration
Transmitter Calibration with the Fluke 750 Series DPC
HART transmitter calibration
37
Pressure Applications