送信機 Ashcroft A4のPDF インストラクションシートをオンラインで閲覧またはダウンロードできます。Ashcroft A4 5 ページ。 Pressure rated incendive rated pressure transmitter
ページを印刷するA4 INTRINSICALLY SAFE &
NON-INCENDIVE RATED PRESSURE
TRANSMITTER INSTRUCTION SHEET
m WARNING! 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
.83
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.
4.78
Surges occur when flow is suddenly
begun, as when a pump is turned on at
full power or a valve is quickly opened.
3.065
Liquid surges are particularly damaging
1.06
to pressure transducers if the pipe is orig-
DIA.
inally empty. To avoid damaging surges,
fluid lines should remain full (if possible),
pumps should be brought up to power
.885
1.06 Hex.
Common For All
Ashcroft
A4 Pressure Transmitter, Typical Dimensions and Construction*
®
Pressure Fittings
Enclosure Option "S"
.50
4.45
3.065
.885
1.06 Hex.
Common For All
Pressure Fittings
Threaded Male Process Connection
©2018 Ashcroft Inc., 250 East Main Street, Stratford, CT 06614-5145, USA, Tel: 203-378-8281, Fax: 203-385-0499, www.ashcroft.com
All sales subject to standard terms and conditions of sale. A4_transducer_im_ RevB_(009-10166)_09-18
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:
.83
• Operator/installer should follow the
proper ESD (electrostatic discharge)
protection procedures before handling
the pressure transducer.
• Ground the body of the transducer
4.78
BEFORE making any electrical
connections
3.065
• When disconnecting, remove the
ground LAST!
1.06
DIA.
Note: The shield and drain wire in the
cable (if supplied) is not connected to
the transducer body, and is not a suitable
ground.
.675
Cable style
electrical
termination
4.78˝
(121)
1.06
DIA.
Enclosure Option "W"
.887˝
.887˝
(22.5)
(22.5)
4.78˝
(121)
2.200
4.78˝
(121)
3.065˝
3.065˝
(78)
(78)
1.06˝
(27)
DIA.
.675˝
.675˝
(17)
(17)
*
Dimensions and construction details may vary based on product specified.
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
.887˝
.887˝
(22.5)
(22.5)
4.78˝
(121)
3.065˝
3.065˝
(78)
(78)
1.06˝
(27)
1.06˝
DIA.
(27)
DIA.
.885˝
.885˝
1.06˝ (27) Hex.
(22)
1.06˝ (27) Hex.
(22)
Common For All
Common For All
Pressure Fittings
Pressure Fittings
Conduit style
electrical
termination
1.06˝
(27)
DIA.