Fluke 721Ex Manuale utente

March 2015

All product names are trademarks of their respective companies.

721Ex

Pressure Calibrator

Users Manual

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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.

11/99

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Table of Contents

Title Page

Introduction .................................................................................................................... 1

Contact Fluke ................................................................................................................. 1

Safety Information .......................................................................................................... 2

Ex-Hazardous Areas ................................................................................................. 4

Measuring Pressure .................................................................................................. 4

Symbols ......................................................................................................................... 5

Standard Equipment....................................................................................................... 6

Product Features............................................................................................................ 6

Display....................................................................................................................... 9

Language Selection................................................................................................... 11

Home Menu Functionality.......................................................................................... 11

Backlight Use ............................................................................................................ 11

Zero Function ............................................................................................................ 11

Menus........................................................................................................................ 12

SWITCHTEST ........................................................................................................... 12

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721Ex

Users Manual

%ERROR.................................................................................................................. 15

MINMAX ................................................................................................................... 18

SET UNITS ............................................................................................................... 19

CONTRAST .............................................................................................................. 20

Lock and Unlock Configurations (CFG) .................................................................... 20

AUTO OFF................................................................................................................ 21

RESOLUTION........................................................................................................... 22

PROBE TYPE ........................................................................................................... 22

DAMP ....................................................................................................................... 24

Measure Pressure ......................................................................................................... 25

Media Compatibility ....................................................................................................... 25

Measurements............................................................................................................... 26

Transmitter Calibration .................................................................................................. 27

mA Input Function..................................................................................................... 27

Pressure-to-Current Transmitter Calibration ............................................................. 27

Ranges and Resolution............................................................................................. 29

Maintenance .................................................................................................................. 30

Replace the Batteries................................................................................................ 30

Clean the Product ..................................................................................................... 31

User-Replaceable Parts and Accessories ..................................................................... 32

Specifications ................................................................................................................ 34

Environmental ........................................................................................................... 34

Electrical and Temperature Measurement (1 year)................................................... 34

Physical .................................................................................................................... 35

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iii

List of Tables

Table Title Page

1. Symbols................................................................................................................................. 5

2. Product Features................................................................................................................... 8

3. Display Functions .................................................................................................................. 10

4. Ranges and Resolutions ....................................................................................................... 29

5. Approved Batteries................................................................................................................ 30

6. User-Replaceable Parts and Accessories ............................................................................. 32

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721Ex

Users Manual

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List of Figures

Figure Title Page

1. Product Interface ................................................................................................................... 7

2. Display................................................................................................................................... 10

3. Pressure Switch Connection ................................................................................................. 13

4. Percent Error Function Connection ....................................................................................... 16

5. Temperature Measurement with RTD Probe......................................................................... 24

6. Measure Current ................................................................................................................... 26

7. Pressure-to-Current Transmitter Connections....................................................................... 28

8. Battery Replacement............................................................................................................. 31

9. User-Replaceable Parts and Accessories ............................................................................. 33

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721Ex

Users Manual

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Introduction

The 721Ex 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.

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721Ex

Users Manual

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.

•Only operate the Product in non-hazardous

areas or classified areas where this device

is certified to operate.

•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.

•Only change batteries in an area known to

be non-hazardous.

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