Fluke 750P Instruction Sheet

750P/750R
Pressure Modules
Instruction Sheet
Introduction
The Fluke 750P/750R Series Pressure Modules (the Product)
let you measure pressure with a wide range of Fluke
calibrators. These calibrators include but are not limited to the:
● 701 and 702 Documenting Process Calibrator
● 717 Series Pressure Calibrators
● 718 Series Pressure Calibrators
● 719 Portable Pressure Calibrator
● 719Pro Pressure Calibrator
● 721 Pressure Calibrator
● 725 Multifunction Process Calibrator
● 726 Multifunction Process Calibrator
● 741B, 743B, 744 Documenting Process Calibrator
● 753, 754 Documenting Process Calibrator
● 3130 Portable Pneumatic Pressure Calibrator
● 525B Temperature/Pressure Calibrator
● 7526A Precision Process Calibrator
● 5520A and 5522A Multi-Product Calibrator
While the 750P provides basic pressure measurement
with various Fluke calibrators, the 750R provides similar
functionality with reference-grade accuracy. However on
certain calibrators with limited display resolution this may
impair the precision of pressure measurement. See Pressure
Module Ranges chart for more information.
The Product measures pressure with an internal
microprocessor compensated sensor. It receives power from
and sends digital information to the Fluke calibrator.
PN 4387748 December 2013
© 2013 Fluke Corporation. Product specifications are subject to change
without notice. Printed in USA. All rights reserved.
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.
Low
Differential
High
Gage
Figure 1. Differential and Gage Pressure Modules
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.
Mechanical Damage Prevention
Caution
To avoid Product damage, never apply more than 10 ft-
lbs 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.
hhb001.jpg
Figure 2. Applying Torque
Table 1. Symbols
Symbol Meaning
Risk of Danger. Important. See Manual.

Conforms to European Union directives.

Conforms to relevant North American Safety

Standards.
Conforms to relevant South Korean EMC

Standards.
Pressure (found on Fluke calibrators)
f
Conforms to relevant Australian EMC

requirements.
This product complies with the WEEE
Directive (2002/96/EC) marking
requirements. The affixed label indicates
that you must not 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. Go to Fluke's
website for recycling information.
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
hhb002.eps
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.
Box Contents
The Product package should contain the listed items below. If
it does not, contact Fluke immediately. See "Contact Fluke".
● Pressure module
● 1/8 NPT male to 1/4 NPT male adapter
● 1/8 NPT male to 1/4 BSP male adapter
● 1/8 NPT male to M20 male adapter
● O-RING,(-111) CAST URETHANE
● Certificate of calibration
● User documentation packet