Omega Products PX835 Installation Manual
User’s Guide
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PX835
M-5089/0112
PX835 EXPLOSION/FLAME PROOF
.83˝
4.78˝
3.065˝
.675˝
1.06˝
DIA.
.83˝
4.78˝
3.065˝
.885˝
1.06˝ (27) Hex.
Common For All
Pressure Fittings
(21)
(121)
(78)
(17)
(22)
(78)
(121)
(21)
(27)
1.06˝
DIA.
(27)
.83˝
4.78˝
3.065˝
.885˝
1.06˝ (27) Hex.
Common For All
Pressure Fittings
(22)
(78)
(121)
(21)
1.06˝
DIA.
(27)
PRESSURE TRANSMITTER
INSTRUCTION SHEET
M-5089/0112
WARNING! READ
BEFORE INSTALLATION
1. GENERAL:
A failure resulting in injury or dam-
ge may be caused by excessive
a
overpressure, excessive vibration or
pressure pulsation, excessive instrument temperature, corrosion of the
pressure containing parts, or other
misuse.
2. OVERPRESSURE:
Pressure spikes in excess of the rated
overpressure capability of the transducer may cause irreversible electri-
cal and/or mechanical damage to the
pressure measuring and containing
elements.
Fluid hammer and surges can destroy
any pressure transducer and must
always be avoided. A pressure snubber
should be installed to eliminate the
damaging hammer effects. Fluid hammer occurs when a liquid flow is suddenly stopped, as with quick closing
solenoid valves. Surges occur when
flow is suddenly begun, as when a
pump is turned on at full power or a
alve is quickly opened.
v
iquid surges are particularly damag-
L
ing to pressure transducers if the pipe
is originally empty. To avoid damaging
surges, fluid lines should remain full (if
possible), pumps should be brought up
to power slowly, and valves opened
slowly. To avoid damage from both fluid
hammer and surges, a surge chamber
should be installed.
Symptoms of fluid hammer and surge's
damaging effects:
• Pressure transducer exhibits an output at zero pressure (large zero offset).
• Pressure transducer output remains
constant regardless of pressure
• In severe cases, there will be no output.
FREEZING:
Prohibit freezing of media in pressure
port. Unit should be drained (mount in
vertical position with electrical termination upward) to prevent possible overpressure damage from frozen media.
3. STATIC ELECTRICAL CHARGES:
Any electrical device may be suscepti-
le to damage when exposed to static
b
electrical charges. To avoid damage to
the transducer observe the following:
• Operator/installer should follow the
proper ESD (electrostatic discharge)
protection procedures before handling
the pressure transducer.
• Ground the body of the transducer
BEFORE making any electrical
connections
• When disconnecting, remove the
ground LAST!
Note: The shield and drain wire in the
cable (if supplied) is not connected to
the transducer body, and is not a suitable ground.
Omega®PX835 Pressure Transmitter, Typical Dimensions and Construction*
Conduit
electrical
termination
Dimensions and construction details may vary based on product specified.
*
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