Q: Why is my gauge pointer off zero?
A: The gauge may have been dropped or over pressured.
Q: Why is my liquid filled gauge pointer off zero?
A:Pressure build up in the cast – to fix relieve pressure by removing and reinserting the rubber bung at the top of the gauge.
Q: Why are gauges filled with liquid?
A:To avoid early fatigue from vibration or to dampen the indication due to pulsating pressure.
Q: What is the maximum temperature that my gauge can be used at?
A:Gauges should not be exposed to excessive heat or cold, as this may cause them to indicate incorrectly. Working fluids at a temperature above 60°C should not be allowed to enter the gauge. Remember – if a gauge shank cannot be grasped by hand without discomfort, it is working at too high a temperature. (AS1349-1986).
Conversion Table
| Various Pressure Units | kPa |
|---|---|
| 1 bar | 100 |
| 1 mbar | 0.100 |
| 1 PSI | 6.89476 |
| 1 cm of Mercury | 1.330 |
| 1 inch of mercury | 3.386 |
| 1 kg/cm2 | 98.067 |
| 1 metre of water | 9.789 |
| 1 foot of water | 2.984 |
| 1 inch of water | 0.249 |
| 1 atmosphere | 101.325 |
The above information is courtesy of Ross Brown Sales.
