selection of gauge used in hydrostatic testing

Discussion created by ching_ka_ho on May 12, 2017

After read the standard NFPA 10 clause, I have got a question and need help to clarify.
I have a hydraulic pump with a gauge can read from 200 to 6800 kPa and the smallest graduation is 100 kPa. And I need to hydrostatic test a fire extinguisher in 41 bar.
The clause mention "Test pressure gauges shall be capable of being read to within 1 percent of the test pressure...", is that mean my gauge is no suitable to use in the hydrostatic test as the gauge can not read 0.41 bar (41 kPa)?
Or I get the wrong mean of this clause?