750PEx
Pressure Modules
Instruction Sheet
Introduction
The Fluke 750PEx Series Pressure Modules (the Product) are to be used with Fluke intrinsically safe calibrators such as the 718Ex.
The Product measures pressure with an internal microprocessor compensated sensor. It receives power from and sends digital information to the Fluke calibrator.
Gage pressure modules have one pressure fitting and measure pressure with respect to atmospheric pressure.
Differential pressure modules have two pressure fittings and measure the difference between the applied pressure on the high fitting versus the low fitting. A differential pressure module functions like a gage module when the low fitting is open. The absolute pressure modules measure pressure with respect to an absolute vacuum. The vacuum pressure modules measure negative pressure.
See the Users Manual for your specific Fluke calibrator for operation instructions. Differential and Gage models are shown in Figure 1.
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Differential |
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DEAExassI |
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KRAiaIIDiv1 |
2.510in. 750P |
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04CT4 GaGroup |
kPa |
H0 |
01Ex |
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ATEX |
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A- |
2 |
MPRES |
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11021G D |
5m |
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XTEx= iaII |
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ODULESURE |
High |
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0ºC CT4 |
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...+5 Ga |
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0ºC |
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RAN |
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Gage |
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DEAEKxasiasI |
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IIDiv1 |
2.5 in. 50P |
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04CT4 GaGroup |
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ATEX |
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A- |
25m |
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MPRESS |
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11021G D |
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XTExia |
ODUL |
EURE |
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IICT |
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=0ºC... 4 |
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+50ºGaC |
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hhb001.jpg |
Figure 1. Differential and Gage Pressure Modules
PN 4562480 September 2017
© 2017 Fluke Corporation. Product specifications are subject to change without notice. All rights reserved.
Safety Information
A Warning identifies conditions and procedures that are dangerous to the user. A Caution identifies conditions and procedures that can cause damage to the Product or the equipment under test.
Warning
To avoid injury due to the release of high-pressure fluid:
●Use only adapters and fittings rated to withstand the appropriate pressure. Ensure that all adapters and fittings are securely connected.
●Never exceed the specified BURST PRESSURE for the Product.
●To avoid a violent release of pressure in a pressurized system, shut off the isolation valve and slowly bleed off the pressure before you attach or remove the pressure module from the pressure line.
●Do not alter the Product and use only as specified, or the protection supplied by the Product can be compromised.
Ex-Hazardous Areas
The Product has been designed for use in Ex-Hazardous
Areas. These are areas where potentially flammable or explosive vapors may occur. These areas are referred to as hazardous (classified) locations in the United States, as Hazardous Locations in Canada, as Potentially Explosive Atmospheres in Europe and as Explosive Gas Atmospheres by most of the rest of the world. The Product is designed as intrinsically safe. This means that connecting the Product to
equipment that is used within intrinsically-safe circuits will not cause an ignition-capable arc as long as the entity parameters are suitably matched.
Warning
To prevent fire, explosion, or personal injury:
●Check entity parameters before making any connections to this device.
●Use only specified replacement parts or Intrinsic Safety can be impaired.
●Precautions are required to ensure that a chargegenerating mechanism is unlikely to be present, and/or discharge to earthed metal is improbable.
The exposed metal parts are not earthed and have a capacitance of more than 3 pF with respect to an
earthed conductor. If a charge-generating mechanism is present, an incendive level of charge could migrate to these metal parts and subsequently discharge to earthed metal.
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Table 1. Symbols |
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Symbol |
Meaning |
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WARNING. RISK OF DANGER. |
Direct Current
Consult user documentation.
Conforms to European Union directives.
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Conforms to relevant South Korean EMC |
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Standards. |
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Certified by CSA Group to North American safety |
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standards. |
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fPressure (found on Fluke calibrators)
Conforms to relevant Australian EMC standards.
( |
Conforms to the European Explosive |
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Atmospheres (ATEX) directive. |
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Medium compatibility: 316 Stainless Steel, |
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Medium compatibility: noncorrosive gasses. |
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This product complies with the WEEE Directive |
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(2002/96/EC) marking requirements. The |
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affixed label indicates that you must not |
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discard this electrical/electronic product in |
domestic household waste. Product Category:
With reference to the equipment types in the WEEE Directive Annex I, this product is
classed as category 9 “Monitoring and Control Instrumentation” product. Do not dispose of this product as unsorted municipal waste.
Mechanical Damage Prevention
Caution
To avoid Product damage, never apply more than 10 lb-ft of torque between the pressure module fittings or between the fittings and the body of the module. Always apply appropriate torque between the pressure module fitting and connecting fittings or adapters.
Over Pressure Damage Prevention
Caution
To avoid Product damage:
●Use the Product only with specified media as shown on the Product label to avoid Product damage from corrosion.
●To avoid product damage do not apply pressure in excess of 120 % of the specified upper limit.
Figure 2 shows correct and incorrect ways to use a wrench to apply torque to the pressure module fitting.
hhb002.eps |
Figure 2. Applying Torque
Recommended Measurement Technique
For best results, before you zero the Product or take measurements, pressurize the Product to full scale and then vent to zero pressure (atmosphere).
Note
Low-range pressure modules may be sensitive to gravity. For best results, pressure modules 30 psi and below should be held at the same physical orientation from the time they are zeroed until the measurement is complete.
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