Fluke 721 User manual

October 2013
© 2013 Fluke Corporation. All rights reserved. Specifications are subject to change without notice.
All product names are trademarks of their respective companies.
721
Pressure Calibrator
Users Manual

LIMITED WARRANTY AND LIMITATION OF LIABILITY
This Fluke product will be free from defects in material and workmanship for three years from the date of purchase. This
warranty does not cover fuses, disposable batteries, or damage from accident, neglect, misuse, alteration, contamination, or
abnormal conditions of operation or handling. Resellers are not authorized to extend any other warranty on Fluke’s behalf.
To obtain service during the warranty period, contact your nearest Fluke authorized service center to obtain return
authorization information, then send the product to that Service Center with a description of the problem.
THIS WARRANTY IS YOUR ONLY REMEDY. NO OTHER WARRANTIES, SUCH AS FITNESS FOR A PARTICULAR
PURPOSE, ARE EXPRESSED OR IMPLIED. FLUKE IS NOT LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR
CONSEQUENTIAL DAMAGES OR LOSSES, ARISING FROM ANY CAUSE OR THEORY. Since some states or countries
do not allow the exclusion or limitation of an implied warranty or of incidental or consequential damages, this limitation of
liability may not apply to you.
Fluke Corporation
P.O. Box 9090
Everett, WA 98206-9090
U.S.A.
Fluke Europe B.V.
P.O. Box 1186
5602 BD Eindhoven
The Netherlands
11/99

i
Table of Contents
Title Page
Introduction .................................................................................................................... 1
Contact Fluke ................................................................................................................. 1
Safety Information .......................................................................................................... 2
Symbols ......................................................................................................................... 4
Standard Equipment....................................................................................................... 5
Product Features............................................................................................................ 5
Display....................................................................................................................... 8
Language Selection................................................................................................... 9
Home Menu Functionality.......................................................................................... 10
Backlight Use ............................................................................................................ 10
Zero Function ............................................................................................................ 10
External Sensor (Absolute)........................................................................................ 10
Menus ............................................................................................................................ 11
SWITCHTEST ........................................................................................................... 11
%ERROR .................................................................................................................. 14

721
Users Manual
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MINMAX ................................................................................................................... 17
SET UNITS ............................................................................................................... 18
CONTRAST .............................................................................................................. 19
Lock and Unlock Configurations (CFG) .................................................................... 19
AUTO OFF................................................................................................................ 20
RESOLUTION........................................................................................................... 21
HART ........................................................................................................................ 21
PROBE TYPE........................................................................................................... 22
DAMP ....................................................................................................................... 24
Measure Pressure ......................................................................................................... 24
Media Compatibility ....................................................................................................... 25
Measurements............................................................................................................... 25
Transmitter Calibration .................................................................................................. 28
mA Input Function..................................................................................................... 28
Pressure-to-Current Transmitter Calibration ............................................................. 28
Ranges and Resolution............................................................................................. 30
Maintenance .................................................................................................................. 31
Replace the Batteries................................................................................................ 31
Clean the Product ..................................................................................................... 32
User-Replaceable Parts and Accessories ..................................................................... 33
General Specifications................................................................................................... 35
Environmental........................................................................................................... 35
Electrical and Temperature Measurement (1 year)................................................... 35
Physical .................................................................................................................... 36

iii
List of Tables
Table Title Page
1. Symbols................................................................................................................................. 4
2. Product Features................................................................................................................... 7
3. Display Functions .................................................................................................................. 9
4. Ranges and Resolutions ....................................................................................................... 30
5. User-Replaceable Parts and Accessories ............................................................................. 33

721
Users Manual
iv

v
List of Figures
Figure Title Page
1. Product Interface ................................................................................................................... 6
2. Display................................................................................................................................... 8
3. Pressure Switch Connection ................................................................................................. 12
4. Percent Error Function Connection ....................................................................................... 15
5. Temperature Measurement with RTD Probe......................................................................... 23
6. Measure Current ................................................................................................................... 26
7. Voltage Measurement ........................................................................................................... 27
8. Pressure-to-Current Transmitter Connections....................................................................... 29
9. Battery Replacement............................................................................................................. 32
10. User-Replaceable Parts and Accessories ............................................................................. 34

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Users Manual
vi

1
Introduction
The 721 Pressure Calibrator (the Product) is a simple to
use and versatile pressure calibrator. The two internal
pressure sensors are configured with different pressure
measurement ranges. One range for lower pressure (P1)
and one range for higher pressure (P2). The Product
features inputs for mA, switch contacts, and an RTD
probe. An external pressure module option gives a wider
range of pressure calibration options that include absolute
and differential pressure measurement.
Contact Fluke
To contact Fluke, call one of the following telephone
numbers:
•Technical Support USA: 1-800-44-FLUKE
(1-800-443-5853)
•Calibration/Repair USA: 1-888-99-FLUKE
(1-888-993-5853)
•Canada: 1-800-36-FLUKE (1-800-363-5853)
•Europe: [phone]
•Japan: [phone]
•Singapore: [phone]
•Anywhere in the world: [phone]
Or, visit Fluke's website at www.fluke.com.
To register your product, visit http://register.fluke.com.
To download manuals, or to view, print, or download the
latest manual supplement, visit
http://us.fluke.com/usen/support/manuals.

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Users Manual
2
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 prevent possible electrical shock, fire, or
personal injury:
•Only assemble and operate high-
pressure systems if you know the
correct safety procedures. High-pressure
liquids and gases are hazardous and the
energy from them can be released
without warning.
•Read all safety information before you
use the Product.
•Carefully read all instructions.
•Do not use the Product around explosive
gas or vapor.
•Use the correct terminals, function, and
range for measurements.
•Do not apply more than the rated
voltage, between the terminals or
between each terminal and earth ground.
•Do not touch voltages > 30 V ac rms,
42 V ac peak, or 60 V dc.
•Remove all probes, test leads, and
accessories before the battery door is
opened.
•Do not exceed the Measurement
Category (CAT) rating of the lowest rated
individual component of a Product,
probe, or accessory.
•Do not use and disable the Product if it
is damaged.
•Remove the input signals before you
clean the Product.
•Use only specified replacement parts.
•Have an approved technician repair the
Product.
•Use the Product only as specified, or the
protection supplied by the Product can
be compromised.

Pressure Calibrator
Safety Information
3
•Pressure sensors can be damaged
and/or personnel injury can occur due to
improper application of pressure.
Vacuum should not be applied to any
gauge pressure sensor. The Product
display shows “OL” when an
inappropriate pressure is applied. If “OL”
is shown on any pressure display, the
pressure should be reduced or vented
immediately to prevent Product damage
or possible personnel injury. “OL” is
shown when the pressure exceeds 110 %
of the nominal range of the sensor or
when a vacuum in excess of 2 PSI is
applied on gauge range sensors.
•Push the ZERO button to zero the
pressure sensor when vented to
atmospheric pressure.
•Remove the batteries if the Product is
not used for an extended period of time,
or if stored in temperatures that exceed
the battery manufacturer’s
specifications. If the batteries are not
removed, battery leakage can damage
the Product.
•Replace the batteries when the low
battery indicator shows to prevent
incorrect measurements.
•Be sure that the battery polarity is
correct to prevent battery leakage.
•Repair the Product before use if the
battery leaks.
•The battery door must be closed and
locked before you operate the Product.
•Use only specified replacement parts.

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Users Manual
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Symbols
Symbols used on the Product or in this manual are shown in Table 1.
Table 1. Symbols
Symbol Description Symbol Description
Risk of Danger. Important information. See
Manual. Conforms to relevant North American Safety Standards.
Hazardous voltage. Risk of electric shock. Double Insulated
Conforms to European Union directives. Conforms to relevant Australian EMC standards.
Inspected and licensed by TÜV Product
Services. Battery

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.
Conforms to relevant South Korean EMC
Standards.

Pressure Calibrator
Standard Equipment
5
Standard Equipment
Make sure that the Product shipment is complete. It must
include:
•The Product
•Product Manuals CD
•Getting Started Manual
•Quick Reference Guide
•Test leads
•Carry case
•Calibration certificate
Product Features
Figure 1 and Table 2 shows the location of the buttons,
pressure controls, connection ports, and electrical inputs.

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Users Manual
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30V
24mA
MAX
V
mA
COM
F1 F2 F3
ZERO
1
2
3
4
5
6
10
8
7
9
11
12
hmq001.eps
Figure 1. Product Interface

Pressure Calibrator
Product Features
7
Table 2. Product Features
Item Description
Power button. Turns on and off the Product
Function buttons. Used to configure the Product. These keys correspond to messages on the display.
Zero button. Zeros pressure measurements.
Backlight button. Push to turn the backlight on or off.
COMMON input
Input terminals to measure current, volts, and a contact closer for switch test.
Low pressure port [P1]
High pressure port [P2]
RTD probe connector
External pressure module connector
Firmware programming connector (for factory use only)
Battery door

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Users Manual
8
Notes
When is pushed to turn on the Product, a
short startup self-check routine is run. During
that routine, the display shows the current
firmware revision level, auto-shutdown status,
and the range of the internal pressure sensors.
A maximum of 5 minutes warm-up is necessary
for the product to reach rated accuracy. A longer
warm-up period can be necessary for large
changes in ambient temperature. See the “Zero
Function Use” section for more about zeroing
the pressure sensor displays. It is recommended
that pressure ranges be zeroed each time the
Product is started.
Display
The display has two main regions:
•The menu bar (located at the bottom of the screen) is
used with the function buttons to access the Product
menu.
•The main display has a maximum of three process
measurement sub-regions.
These sub-regions will be referred to as the UPPER,
MIDDLE and LOWER displays. Figure 2 shows the
location of the different display fields. Table 3 describes
them.
hmq007.eps
Figure 2. Display

Pressure Calibrator
Product Features
9
Table 3. Display Functions
Item
Number Name Description
Primary
Parameters
Shows what is being
measured.
Span
Indicator
Shows the percent of the
4 mA to 20 mA span. (For
mA functions only.)
Pressure
Units
Shows one of 17 pressure
units available for display.
Units Shows the unit of measure
for the display.
Language Selection
The user interface is available in three languages:
•English
•Norwegian
•German
To select a language:
1. Turn the Product off.
2. Hold down , , and simultaneously.
3. As the Product powers up, the display shows the
language in the top left corner of the display. Repeat
the procedure to show each subsequent language.
Once the necessary language is shown, the Product
user interface stays in that language until another
language is chosen.

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Users Manual
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Home Menu Functionality
There are three options for the Home Menu:
•P1/P2
•mA/V/RTD
•MENU
These options are shown across the bottom of the
display.
From anywhere within the menu structure, push to get
back to the Home Menu.
Backlight Use
Push to toggle on and off the backlight. This function
cannot be controlled by the serial interface.
Zero Function
In pressure mode and when the pressure is within the
zero limit, The Product zeros pressure on any port that is
currently shown on the display. The zero limits are within
10 % of the full-scale range of the selected sensor. If the
display shows “OL,” the zero function will not operate.
External Sensor (Absolute)
If the active display shows a selected absolute module,
and Zis pushed, push (SET) and you are prompted
to set or default the pressure reference. This is done with
and (the up and down arrows). The sensor port
must be open (vented) to atmosphere while this
procedure is done. Push (SET REF DONE) when
zero adjust is complete.

Pressure Calibrator
Menus
11
Menus
There are 11 sub menus that can be accessed from 
(Main Menu). Push to go to the next menu selection.
For the last menu, push (DONE) to return to the Main
Menu.
The 11 sub-main menus are:
•SWITCHTEST
•%ERROR
•MINMAX
•SET UNITS
•CONTRAST
•LOCK CFG
•AUTO OFF
•RESOLUTION
•HART
•PROBE TYPE
•DAMP
Push , , or , depending on the menu, to toggle
through each parameter of an active menu. The individual
menus are explained in the subsequent sections.
SWITCHTEST
To access the SWITCHTEST menu, push .
SWITCHTEST is shown on the menu bar.
Connect a pressure switch to the Product as shown in
Figure 3.

721
Users Manual
12
30V
24mA
MAX
V
mA
COM
F1 F2 F3
ZERO
Pressure
Switch
Use low volume tubing
when possible
hmq017.eps
Figure 3. Pressure Switch Connection
To do a switch test:
1. Use the P1, P2, or external pressure input
connections to connect the Product to the input of the
switch. Connect the contact output of the switch to
the COM and V mA terminals of the Product. The
polarity of the terminals does not matter.
2. Connect the pump to the Product and the pressure
switch.
3. Make sure the vent on the pump is open.
4. Zero the Product if necessary.
5. Close the vent after the Product is zeroed.
6. Push to select P1, P2, or EXT depending on how
the Product is connected.
7. If connected to a normally closed switch, the top of
the display will read “CLOSE”.
8. Slowly apply pressure with the pump until the switch
opens.
Note
In the SWITCHTEST mode the display update
rate is increased to help capture changing
pressure inputs. Even with this enhanced
sample rate pressurizing, the test should be
done slowly to ensure accurate readings.