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All sales subject to standard terms and conditions of sale. A2X_transducer_im_ RevB_(009-10167)_09-18
A2X EXPLOSION/FLAME PROOF
PRESSURE TRANSDUCER
INSTRUCTION SHEET
Ashcroft®A2X Pressure Transmitter, Typical Dimensions and Construction*
*Dimensions and construction details may vary based on product specified.
Conduit
electrical
termination
mWARNING! READ m
BEFORE INSTALLATION
1. GENERAL:
A failure resulting in injury or damage
may be caused by excessive overpres-
sure, excessive vibration or pressure
pulsation, excessive instrument tem-
perature, corrosion of the pressure
containing parts, or other misuse.
Consult Ashcroft Inc., Stratford,
Connecticut, USA before installing if
there are any questions or concerns.
2. OVERPRESSURE:
Pressure spikes in excess of the rated
overpressure capability of the transducer
may cause irreversible electrical 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 valve is quickly opened.
Liquid surges are particularly damaging
to pressure transducers if the pipe is orig-
inally empty. To avoid damaging surges,
fluid lines should remain full (if possible),
pumps should be brought up to power
.887˝
4.78˝
3.065˝
.675˝
1.06˝
DIA.
.887˝
4.78˝
3.065˝
.885˝ 1.06˝ (27) Hex.
Common For All
Pressure Fittings
(22.5)
(121)
(78)
(17)
(27)
.887˝
4.78˝
3.065˝
.675˝
1.06˝
DIA.
.887˝
4.78˝
3.065˝
.885˝ 1.06˝ (27) Hex.
Common For All
Pressure Fittings
(22)
(78)
(121)
(22.5)
1.06˝
DIA.
(27)
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 termina-
tion upward) to prevent possible over-
pressure damage from frozen media.
3. STATIC ELECTRICAL CHARGES:
Any electrical device may be susceptible
to damage when exposed to static elec-
trical 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.
4. WARNING/AVERTISSEMENT
• DO NOT OPEN UNIT WHEN
ENERGIZED
NE PAS OUVRIR L’APPAREIL
LORSQU’IL EST SOUS TENSION
• SUBSTITUTION OF COMPONENTS
MAY IMPAIR INTRINSIC SAFETY
LA SUBSTITUTION DE COMPOSANTS
PEUT COMPROMETTRE LA
SÉCURITÉ INTRINSÈQUE”
• EXPLOSION HAZARD - DO NOT
DISCONNECT WHILE CIRCUIT IS
LIVE UNLESS AREA IS KNOWN TO
BE NON-HAZARDOUS
RISQUE D’EXPLOSION. NE PAS
DÉBRANCHER TANT QUE LE
CIRCUIT EST SOUS TENSION, À
MOINS QU’lL NE S’AGISSE D’UN
EMPLACEMENT NON DANGEREUX
• EXPLOSION HAZARD –
SUBSTITUTION OF COMPONENTS
MAY IMPAIR SUITABILITY FOR
CLASS I, DIVISION 2
RISQUE D’EXPLOSION – LA
SUBSTITUTION DE COMPOSANTS
PEUT RENDRE CE MATÉRIEL
INACCEPTABLE POUR LES
EMPLACEMENTS DE CLASSE I,
DIVISION 2
