Frequently Asked Questions: Pressure

• Why is there a $26.00 high accuracy fee?

  This fee is applied to any pressure gauge that needs to be certified with an accuracy greater than 1.0%. All pressure gauges are tested at five test points, if their accuracy is 1%, 2.5% or higher. Below 1% accuracy, we test at 10 test points and charge the additional test gauge high accuracy fee.

• Why is there a $100.00 ultra-high accuracy fee?

  This fee is applied to any pressure gauge that needs to be certified with an accuracy greater than 0.1%. We test at 10 test points which are typically performed using primary standards such as piston gauges.  These charges reflect the time and accuracy required to calibrate precision pressure equipment such as transducers and calibrators.

• Can you adjust pressure gauges?

  Most gauges that are not permanently sealed can be adjusted to compensate for small errors or minor overpressure abuse. If the gauge has experienced excessive overpressure, it may require replacement.

• Can you refill a glycerin filled gauge?

  Yes, but if the fluid has leaked out of the gauge, the leak must be repaired first.

• My lens is cracked. Can you replace it?

  Many lenses can be replaced unless the case is permanently sealed by welding or brazing.

• Why did you only check my gauge up to half its range?

  The last test point of a pressure gauge is at half of its range.  This hysteresis test verifies that after the gauge is pressurized it is repeatable at half scale.  Sometimes customers see the last reading and assume that it was the highest measurement.  When you look through the other points on your certificate you will find the higher measurement points.