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).
|Various Pressure Units||kPa|
|1 cm of Mercury||1.330|
|1 inch of mercury||3.386|
|1 metre of water||9.789|
|1 foot of water||2.984|
|1 inch of water||0.249|
The above information is courtesy of Ross Brown Sales.