Installation and Maintenance Instructions for
28HPX High Purity Gauge
© Ashcroft Inc. 2020, 250 East Main Street, Stratford, CT 06614-5145, USA, Tel: 203-378-8281, Fax: 203-385-0357, www.ashcroft.com
All sales subject to standard terms and conditions of sale. 28_HPX_Gauge_im_RevA_(I&M011-10276)_04-03-20
3
TROUBLES
CHECKPOINTS
POSSIBLE CAUSES
COUNTERMEASURES
The pointer does not move.
1. Check if the pressure had been
applied to the pressure gauge.
1. The pressure is zeroed.
1. Apply pressure.
The pointer does not indicate
pressure.
1. Check whether the fluid and
ambient temperature are within
the operating temperature
range of the pressure gauge.
2. Check whether excessive
vibration exists.
3. Check whether excessive
pressure fluctuations exist.
1. The operating temperature
range has been exceeded.
2. Movement wears due to
vibration.
3. Movement wears due to
pressure fluctuations.
1. Re-install pressure gauge in a
different position.
2. Re-install pressure gauge in a
different position.
3. Reduce pressure fluctuations.
The pointer does not read zero
when the pressure gauge is
removed from the piping.
1. Check whether excessive
pressure had been applied.
2. Check whether excessive
vibration or fluctuating pressure
had been applied.
1. The diaphragm has been
deformed due to excessive
pressure.
2. Movement wears due to
vibration or fluctuating
pressure.
1. Use a higher pressure range.
2. Re-install pressure gauge in a
different position.
The pointer indicates overpressure
reading.
1. Check whether excessive
pressure had been applied.
2. Check whether the gauge was
exposed to excessive vibration
or if it was dropped/impacted.
1. Deformed sensing element due
to excessive pressure.
2. Pointer shift or material
deformation due to excessive
pressure or impact.
1. Use a higher pressure range.
2. Be careful not to drop/impact
gauge.
