Fluke 725Ex Operating Manual

January 2005 Rev. 2, 5/09

© 2005, 2009 Fluke Corporation, All rights reserved. Specifications are subject to change without notice.
All

product names are trademarks of their respective companies.

725Ex

Multifunction Process Calibrator

Users Manual

®

LIMITED WARRANTY AND LIMITATION OF LIABILITY

Each Fluke product is warranted to be free from defects in material and workmanship under normal use and service. The warranty period is
three years and begins on the date of shipment. Parts, product repairs, and services are warranted for 90 days. This warranty extends only
to the original buyer or end-user customer of a Fluke authorized reseller, and does not apply to fuses, disposable batteries, or to any product
which, in Fluke's opinion, has been misused, altered, neglected, contaminated, or damaged by accident or abnormal conditions of operation
or handling. Fluke warrants that software will operate substantially in accordance with its functional specifications for 90 days and that it has
been properly recorded on non-defective media. Fluke does not warrant that software will be error free or operate without interruption.

Fluke authorized resellers shall extend this warranty on new and unused products to end-user customers only but have no authority to ex­tend a greater or different warranty on behalf of Fluke. Warranty support is available only if product is purchased through a Fluke authorized
sales outlet or Buyer has paid the applicable international price. Fluke reserves the right to invoice Buyer for importation costs of re­pair/replacement parts when product purchased in one country is submitted for repair in another country.

Fluke's warranty obligation is limited, at Fluke's option, to refund of the purchase price, free of charge repair, or replacement of a defective
product which is returned to a Fluke authorized service center within the warranty period.

To obtain warranty service, 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 difficulty, postage and insurance prepaid (FOB Destination). Fluke assumes no risk
for damage in transit. Following warranty repair, the product will be returned to Buyer, transportation prepaid (FOB Destination). If Fluke
determines that failure was caused by neglect, misuse, contamination, alteration, accident, or abnormal condition of operation or handling,
including overvoltage failures caused by use outside the product’s specified rating, or normal wear and tear of mechanical components,
Fluke will provide an estimate of repair costs and obtain authorization before commencing the work. Following repair, the product will be
returned to the Buyer transportation prepaid and the Buyer will be billed for the repair and return transportation charges (FOB Shipping
Point).

THIS WARRANTY IS BUYER'S SOLE AND EXCLUSIVE REMEDY AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IM­PLIED, INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR
PURPOSE. FLUKE SHALL NOT BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES OR
LOSSES, INCLUDING LOSS OF DATA, ARISING FROM ANY CAUSE OR THEORY.

Since some countries or states do not allow limitation of the term of an implied warranty, or exclusion or limitation of incidental or consequen­tial damages, the limitations and exclusions of this warranty may not apply to every buyer. If any provision of this Warranty is held invalid or
unenforceable by a court or other decision-maker of competent jurisdiction, such holding will not affect the validity or enforceability of any
other provision.

11/99

Fluke Corporation
P.O. Box 9090
Everett, WA 98206-9090
U.S.A.

To register your product online, visit register.fluke.com

Fluke Europe B.V.
P.O. Box 1186
5602 BD Eindhoven
The Netherlands

Table of Contents

Title Page

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

Contacting Fluke ............................................................................................................ 1

Standard Equipment....................................................................................................... 3

Safety Information .......................................................................................................... 3

Ex Hazardous Areas ...................................................................................................... 3

Faults and Damage ................................................................................................... 8

Safety Regulations .................................................................................................... 9

Certification Information............................................................................................. 10

Getting Acquainted with the Calibrator........................................................................... 10

Input and Output Terminals ....................................................................................... 10

Keys .......................................................................................................................... 12

Display....................................................................................................................... 15

Getting Started ............................................................................................................... 16

Shut Down Mode............................................................................................................ 16

Contrast Adjustment....................................................................................................... 18

Using Measure Mode ..................................................................................................... 19

Measuring Electrical Parameters (Upper Display) ..................................................... 19

i

725Ex

Users Manual

Current Measurement with Loop Power.................................................................... 19

Measuring Electrical Parameters (Lower Display) .................................................... 21

Measuring Temperature............................................................................................ 22

Using Thermocouples .......................................................................................... 22

Using Resistance-Temperature Detectors (RTDs)............................................... 25

Measuring Pressure.................................................................................................. 28

Zeroing with Absolute Pressure Modules.................................................................. 29

Using Source Mode ....................................................................................................... 31

Sourcing 4 to 20 mA.................................................................................................. 31

Simulating a 4- to 20-mA Transmitter........................................................................ 31

Sourcing Other Electrical Parameters....................................................................... 31

Simulating Thermocouples........................................................................................ 34

Simulating RTDs ....................................................................................................... 34

Source Pressure Mode ............................................................................................. 37

Setting 0 % and 100 % Output Parameters ................................................................... 39

Stepping and Ramping the Output................................................................................. 39

Manually Stepping the mA Output ............................................................................ 39

Auto Ramping the Output.......................................................................................... 40

Storing and Recalling Setups......................................................................................... 40

Calibrating a Transmitter................................................................................................ 41

Calibrating a Pressure Transmitter ................................................................................ 43

Calibrating an I/P Device ............................................................................................... 45

Switch Test .................................................................................................................... 47

Testing an Output Device .............................................................................................. 48

Replacing the Batteries.................................................................................................. 49

Approved Batteries ........................................................................................................ 50

Maintenance .................................................................................................................. 50

Cleaning the Calibrator ............................................................................................. 50

ii

Contents

Service Center Calibration or Repair......................................................................... 50

Replacement Parts.................................................................................................... 51

Accessories.................................................................................................................... 53

Specifications ................................................................................................................. 55

DC Voltage Measurement ......................................................................................... 55

DC Voltage Source.................................................................................................... 55

Millivolt Measurement and Source* ........................................................................... 55

DC mA Measurement and Source............................................................................. 56

Ohms Measurement .................................................................................................. 56

Ohms Source............................................................................................................. 56

Frequency Measurement........................................................................................... 56

Frequency Source ..................................................................................................... 57

Temperature, Thermocouples ................................................................................... 57

Loop Power Supply ................................................................................................... 57

RTD Excitation (simulation) ....................................................................................... 58

Temperature, RTD Ranges, and Accuracies............................................................. 58

Pressure Measurement ............................................................................................. 59

General Specifications............................................................................................... 59

(continued)

iii

725Ex

Users Manual

iv

List of Tables

Table Title Page

1. Summary of Source and Measure Functions ........................................................................ 2

2. Symbols................................................................................................................................. 8

3. Input/Output Terminals and Connectors................................................................................ 11

4. Key Functions........................................................................................................................ 13

5. Thermocouple Types Accepted............................................................................................. 23

6. RTD Types Accepted ............................................................................................................ 26

7. mA Step Values..................................................................................................................... 40

8. Approved Batteries................................................................................................................ 50

9. Replacement Parts................................................................................................................ 52

10. Fluke Pressure Module Compatibility .................................................................................... 53

11. Pressure Modules ................................................................................................................. 54

v

725Ex

Users Manual

vi

List of Figures

Figure Title Page

1. Standard Equipment.............................................................................................................. 7

2. Input/Output Terminals and Connectors................................................................................ 10

3. Keys ...................................................................................................................................... 12

4. Elements of a Typical Display ............................................................................................... 15

5. Voltage-to-Voltage Test......................................................................................................... 17

6. Adjusting the Contrast ........................................................................................................... 18

7. Measuring Voltage and Current Output................................................................................. 19

8. Connections for Supplying Loop Power................................................................................. 20

9. Measuring Electrical Parameters........................................................................................... 21

10. Measuring Temperature with a Thermocouple...................................................................... 24

11. Measuring Temperature with an RTD, Measuring 2-, 3-, and 4-Wire Resistance ................. 27

12. Gage and Differential Pressure Modules............................................................................... 28

13. Connections for Measuring Pressure .................................................................................... 30

14. Connections for Simulating a 4 to 20- mA Transmitter in a non-Ex hazardous Area............. 32

15. Electrical Sourcing Connections............................................................................................ 33

16. Connections for Simulating a Thermocouple......................................................................... 35

17. Connection for Simulating a 3-Wire RTD............................................................................... 36

vii

725Ex

Users Manual

18. Connections for Sourcing Pressure ...................................................................................... 38

19. Calibrating a Thermocouple Transmitter............................................................................... 42

20. Calibrating a Pressure-to-Current (P/I) Transmitter .............................................................. 44

21. Calibrating a Current-to-Pressure (I/P) Transmitter .............................................................. 46

22. Calibrating a Chart Recorder ................................................................................................ 48

23. Replacing the Batteries......................................................................................................... 49

viii

Multifunction Process Calibrator

Introduction

WWarning

Read "Safety Information" before using the
Calibrator.

The Fluke 725Ex Multifunction Process Calibrator
(hereafter referred to as “the Calibrator”) is a handheld,
battery-operated instrument that measures and sources
electrical and physical parameters. For a summary of
source and measurement functions, see Table 1.
In addition to the functions in Table 1, the Calibrator has
the following features and functions:

• A split-screen display - The upper display allows the

user to measure volts, current, and pressure only.
The lower display allows the user to measure and
source volts, current, pressure, resistance
temperature detectors, thermocouples, frequency,
and ohms.

• Calibrates a transmitter using the split-screen.

• A thermocouple (TC) input/output terminal and

internal isothermal block with automatic reference
junction temperature compensation.

• Stores and recalls setups.

• Manual stepping and automatic stepping and

ramping.

Contacting 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 view, print, or download the latest manual supplement,
visit http://us.fluke.com/usen/support/manuals

.

.

.

1

725Ex

Users Manual

Function Measure Source

dc V 0 V dc to 30 V dc 0 V dc to 10 V dc

dc mA 0 to 24 mA dc 0 to 24 mA

Frequency 1 CPM to 10 kHz 1 CPM to 10 kHz

Resistance 0 Ω to 3200 Ω 15 Ω to 3200 Ω

Thermocouple Types E, J, K, T, B, R, S, L, U, N, mV, XK, BP

RTD
(Resistance­Temperature
Detector)

Pressure Fluke 700PEx series modules ranging from

Other functions Loop-Power Supply, Step, Ramp, Memory, Dual Display

Table 1. Summary of Source and Measure Functions

Ni120

Pt100 Ω (385)
Pt100 Ω (3926)
Pt100 Ω (3916)

Pt200 Ω (385)

Pt500 Ω (385)
Pt1000 Ω (385)

10 in. H2O to 3,000 psi

Fluke 700PEx series modules ranging from
10 in. H2O to 3,000 psi using an external
pressure source (hand pump)

2

Mulitfunction Process Calibrator
Standard Equipment

Standard Equipment

The items listed below and shown in Figure 1 are included
with the Calibrator. If the Calibrator is damaged or
something is missing, contact the place of purchase
immediately. To order replacement parts, see
Replacement Parts in Table 9.

• TL75 test leads (one set)

• AC72 alligator clips (one set)

• Stackable alligator clip test leads (one set)

• Fluke 725Ex CD-ROM (contains Fluke 725Ex Users

Manual)

• Fluke

• Fluke 725Ex Safety Information

• 4 AA Batteries (installed)

• Hex Key, 5/64 in., short arm

725Ex CCD

Safety Information

A Warning statement identifies conditions and actions that
pose a hazard(s) to the user. A Caution statement
identifies conditions and actions that may damage the
Calibrator or the equipment under test.

Symbols used on the Calibrator and in this manual are
explained in Table 2.

Ex Hazardous Areas

An Ex-hazardous area as used in this manual refers to an
area made hazardous by the potential presence of
flammable or explosive vapors. These areas are also
referred to as hazardous locations, see NFPA 70 Article
500 or CSA C22.1 Section 18.

The Model 725Ex Calibrator 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 Model 725 Ex calibrator is designed as
intrinsically safe. This means that connecting the 725Ex
calibrator 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.

The Calibrator has two sets of parameters. The Vmax and
Imax parameters show the maximum voltage and
maximum current that may be connected to the Model
725Ex terminals without compromising the intrinsic safety.
The voltage and current will generally come from intrinsic
safety barriers that provide power to the field equipment

3

725Ex

Users Manual

such as transmitters and positioners (I/P devices). These
barriers are identified with a maximum open circuit voltage
parameter (Voc) and a maximum short circuit current
parameter (Isc). The matching criterion requires that Voc
of the barrier not exceed 30 V and Isc not exceed 100 mA.

The Model 725Ex calibrator will itself be a source of
voltage and current. Each set of terminals has a Voc and
an Isc rating as shown on Fluke 725Ex CCD. When
connecting terminals to other equipment, the Vmax and
Imax ratings on the other equipment must exceed the Voc
and Isc ratings for the terminals connected to on the
725Ex calibrator.

In addition to matching voltage and current entity
parameters, it is also necessary to verify that capacitance
and inductance has not been exceeded. Again, Fluke
725Ex CCD identifies the maximum capacitance (Ca) and
maximum inductance (La) that is permitted based either
on the intrinsic safety barrier ratings or on the 725Ex
calibrator ratings for the specific terminals used. As an
example, Fluke 725Ex CCD explains that the capacitance
of each unit connected in the circuit (Ci) plus the
capacitance of the cable in the circuit must not exceed the
maximum allowed capacitance (Ca). Similarly for
inductance in the intrinsically safe circuit.

When connecting the 725Ex calibrator into a powered
circuit, i.e. when the circuit is powered by an intrinsic
safety barrier, then the maximum circuit voltage used for
the entity parameter evaluation will be the higher of either
the 725Ex calibrator Voc or of the barrier Voc. The
maximum current will be the sum of the 725Ex calibrator
Isc and the barrier Isc. In this case, the maximum allowed
inductance (La) will be reduced. This value will have to be
determined using the ignition curves found in standards
such as CSA C22.2 No. 157 or UL 913.

For additional information about Ex Hazardous Areas,
refer to ANSI/ISA-12.01.01-1999 Definitions and
Information Pertaining to Electrical Instruments in
Hazardous (Classified) Locations and to ANSI/ISA­RP12.06.01-2003 Recommended Practice for Wiring
Methods for Hazardous (Classified) Locations
Instrumentation Part 1: Intrinsic Safety.

4

Mulitfunction Process Calibrator
Ex Hazardous Areas

W Warning

To avoid electric shock, injury, damage to the Calibrator, or ignition of an explosive atmosphere,
follow all equipment safety procedures.

• Use the Calibrator only as described in this User Manual and the Fluke

Drawing) or the protection provided by the Calibrator may be impaired.

• Inspect the Calibrator before use. Do not use it if it appears damaged.

• Check the test leads for continuity, damaged insulation, or exposed metal. Replace damaged test leads.

• When using probes, keep fingers behind the finger guards on the probes.

• Never apply more than 30.0 V between the input terminals, or between any terminal and earth ground.

• Applying more than 30.0 V to the input terminals invalidates the Calibrator’s Ex Approval and may

result in permanent damage to the unit so it can no longer be used.

• Use the proper terminals, mode, and range for the measuring or sourcing application.

• To prevent damage to the unit under test, be sure the Calibrator is in the correct mode before

connecting the test leads.

• When making connections, connect the COM test probe before the live test probe. When

disconnecting, disconnect the live probe before the COM probe.

• Never open the Calibrator case. Opening the case invalidates the Calibrator’s Ex Approval.

• Make sure the battery door is closed and latched before entering an Ex hazardous area or using the

Calibrator. See “Ex Hazardous Areas”.

• Replace the battery as soon as the B (low battery) symbol appears to avoid false readings that can

lead to electric shock. Remove the Calibrator from the Ex-hazardous area before opening the battery
door. See “Ex Hazardous Areas”.

• Remove test leads from the Calibrator before opening the battery door.

• Measurement Category I (CAT I) is defined for measurements performed on circuits not directly

connected to the mains.

• Turn off circuit power before connecting the Calibrator mA and COM terminals in the circuit. Place

Calibrator in series with the circuit.

725Ex CCD (Concept Control

5

725Ex

Users Manual

• When servicing the Calibrator, use only specified replacement parts. Do not open the Calibrator case.

Opening the case invalidates the Calibrator’s Ex Approval.

• Do not allow water inside the case.

• Before each use, verify the Calibrator’s operation by measuring a known voltage.

• Never touch the probe to a voltage source when the test leads are plugged into the current terminals.

• Do not operate the Calibrator around explosive dust.

• When using a pressure module, make sure the process pressure line is shut off and depressurized

before connecting it or disconnecting it from the pressure module.

• Use four properly installed AA batteries to power the Calibrator.

• Use only the batteries listed in Table 8.

• Disconnect test leads from the circuit under test before changing to another measure or source

function.

• When measuring the pressure of toxic or flammable gases, care must be taken to minimize the

possibility of leakage. Confirm that all pressure connections are properly sealed.

• Do not use in a damp or wet environment.

WCaution

To avoid possible damage to Calibrator or to equipment under test:

• Disconnect the power and discharge all high-voltage capacitors before testing resistance or continuity.

• Use the proper jacks, function, and range for the measurement or sourcing application.

6

Mulitfunction Process Calibrator
Ex Hazardous Areas

20

0

4

.15

73

26

6

L

AC72

Alligator Clips

Test Lead Set

TL75

Stackable
Test Leads

30V 24mA MAX ALL TERMINALS

SOURCE / MEASURE

mA

+

3W

mA

-

4W

R

1

10

46

0

Z

o

n

STORE

e

0

A

E

x

ia

IIB

1

I.S

7

1

. C

C

la

ss

I D

iv

1

, G

SETUP

ro

u

p

s

B

,C

,D

RECA

LL

V

Hz
RTD

COM

100%

25%

25%

0%

MEASURE

V

TC

mA

LOOP

COM

aly01f.eps

Figure 1. Standard Equipment

7

725Ex

Users Manual

Table 2. Symbols

Symbol Meaning Symbol Meaning

+ Power ON/OFF

J Earth ground )

W

M Battery F Direct current

X Hazardous Voltage f

(

~

Risk of Danger. Important
information. Refer to manual.

Conforms to ATEX requirements

Do not dispose of this product as unsorted municipal waste. Go to Fluke’s website for recycling
information.

T

P Conforms to relevant European Union directives.

;

Faults and Damage

Applying a voltage greater than 30 V to the input of the
Calibrator invalidates its Ex Approval and may impair its
safe operation in an Ex-hazardous area. See “Ex
Hazardous Areas”.

If there is any reason to suspect that the safe operation of
the Calibrator has been affected, it must be immediately
withdrawn from use, and precautionary measures must be

Double insulated

Conforms to relevant Canadian and US Standards.
Certification # LR110460-2

Pressure

Conforms to relevant Australian standards

taken to prevent any further use of the Calibrator in an
Ex-hazardous area. See “Ex Hazardous Areas”.

Fully observe all instructions, warnings, and cautions
contained in this manual. In case of doubt due to
translation and/or printing errors, refer to the original
English users manual.

The safety features and integrity of the unit may be
compromised by any of the following:

8

Mulitfunction Process Calibrator
Ex Hazardous Areas

• External damage to the housing

• Internal damage to the Calibrator

• Exposure to excessive loads

• Incorrect storage of the unit

• Damage sustained in transit

• Correct certification is illegible

• Functioning errors occur

• Permitted limitations are exceeded

• Functioning errors or obvious measurement

inaccuracies occur which prevent further
measurement by the Calibrator

• Opening the case

Safety Regulations

The use of the Calibrator meets the requirements of the
regulations providing that the user observes and applies
the requirements as stated in the regulations and that
improper and incorrect use of the unit is avoided.

• Use must be restricted to the specified application

parameters.

• Do not open the Calibrator.

• Do not remove or install the batteries within the

Ex-hazardous area. See “Ex Hazardous Areas”.

• Do not carry additional batteries within the

Ex-hazardous area. See “Ex Hazardous Areas”.

• Use only type tested batteries. The use of any other

batteries will invalidate the Ex-certification and
present a safety risk.

• Do not use the Calibrator in any circuit where the

voltage or transients may exceed 30 V.

• Only use the Calibrator in circuits with compatible

entity parameters. When the calibrator is used in an
Ex hazardous area, unless the area is known to be
safe, do not connect to any circuits that exceed the
entity parameters defined on Fluke 725Ex CCD
Control Drawing. See “Ex Hazardous Areas”.

9

725Ex

Users Manual

Certification Information

• P ( II 1 G EEx ia IIB 171 °C

0344 KEMA 04ATEX1303

• ) Class I Div. 1 Groups B,C, and D

LR110460 Class I Zone 0 Aex/Ex ia IIB 171 °C

2004.1573226

• Ta = -10 °C… +55 °C

• Manufactured by Martel Electronics, Inc., 1F

Commons Drive
Londonderry, NH, USA

Getting Acquainted with the Calibrator

Input and Output Terminals

Figure 2 shows the Calibrator input and output terminals.
Table 3 explains their use.

MEAS

SOURCE

STORE
SETUP

RECALL

V mA

LOOP

MULTIFUNCTION

725Ex

PROCESS CALIBRATOR

V mA

TC RTD

2004.1573266
LR110460

Zone 0 AEx ia IIB 171 C

I.S. Class I Div 1, Groups B,C,D

1

ZERO

Hz

C °F

°

100%

25%

25%

0%

2

10

8

7

6

5

3

4

aly05f.eps

Figure 2. Input/Output Terminals and Connectors

Mulitfunction Process Calibrator
Getting Acquainted with the Calibrator

Table 3. Input/Output Terminals and Connectors

No Name Description

A

B, C

D

E, F

G, H

Pressure module
connector

MEASURE V, mA
terminals

TC input/output Terminal for measuring or simulating thermocouples. This terminal accepts a miniature

SOURCE/ MEASURE
V, RTD, Hz, Ω
terminals

SOURCE/ MEASURE
mA terminals, 3W, 4W

Connects the Calibrator to a pressure module.

Input terminals for measuring voltage, current, and supplying loop power.

polarized thermocouple plug with flat, inline blades spaced 7.9 mm (0.312 in) center to
center.

Terminals for sourcing or measuring voltage, resistance, frequency, and RTDs.

Terminals for sourcing and measuring current, and performing 3W and 4W RTD
measurements.

11

725Ex

Users Manual

Keys

Figure 3 shows the Calibrator keys and Table 4 explains
their use.

MULTIFUNCTION

725Ex

PROCESS CALIBRATOR

2

V mA

TC RTD

2004.1573266
LR110460

Zone 0 AEx ia IIB 171 C

I.S. Class I Div 1, Groups B,C,D

V
Hz

RTD

COM COM

ZERO

Hz

C °F

°

100%

25%

25%

0%

MEASURE

V

TC

mA

LOOP

V mA

LOOP

MEAS

1

SOURCE

STORE

SETUP

RECALL

SOURCE / MEASURE

+

mA
3W

-

mA
4W

30V MAX ALL TERMINALS

3

4

5

19

18

16

15

14

12

Figure 3. Keys

20

17

13

13

MEAS

SOURCE

STORE

SETUP

RECALL

II 2 G EEx ia IIC T4
ZELM 02 ATEX 0120

SOURCE / MEASURE

+

mA
3W

-

mA
4W

MULTIFUNCTION

725Ex

PROCESS CALIBRATOR

V mA

LOOP

V mA

TC RTD

2004.1573266
LR110460

Zone 0 AEx ia IIB 171 C

I.S. Class I Div 1, Groups B,C,D

REFER TO CONTROL DRAWING:

ANSCHLUSSSCHEMA BEACHTEN:

SUIVRE LE SCHÉMA DE CONNEXION:

FLUKE 725Ex CCD

30V MAX ALL TERMINALS

V
Hz

RTD

COM COM

6

10

11

7

8

9

aly41f.eps

ZERO

Hz

C °F

°

100%

25%

25%

0%

MEASURE

V

TC

mA

LOOP

12

Mulitfunction Process Calibrator
Getting Acquainted with the Calibrator

Table 4. Key Functions

No. Key Description

A O Turns the power on and off.

B l

C A

Selects voltage, mA, or loop power measurement functions in the upper display.
Clears the switch test. See “Switch Test”.

Selects the pressure measurement function in the upper display. Repeated pushes cycle through
the different pressure units.

Use for pressure switch test. See “Switch Test”.

D K Zeros the pressure module reading. This applies to both upper and lower displays.
E C Turns backlight on and off.

F F Toggles between frequency and ohms measurement and sourcing functions.
G

D

H G

I
J

H
I

K J

L L

13

Toggles between Centigrade and Fahrenheit when in TC or RTD functions.

Recalls a source value from memory corresponding to 100 % of span and sets it as the source
value. Press and hold to store the source value as the 100 % value.

Increments output by 25 % of span.

Decrements output by 25 % of span.

Recalls a source value from memory corresponding to 0 % of span and sets it as the source value.
Press and hold to store the source value as the 0 % value.

Cycles through :

E Slow repeating 0 % - 100 % - 0 % ramp
P Fast repeating 0 % - 100 % - 0 % ramp
N Repeating 0 % - 100 % - 0 % ramp in 25 % steps

725Ex

Users Manual

Table 4. Key Functions (cont.)

No. Key Description

A,M
A,M

OY
OZ

M XW Y

Z

N Q
O S

P

Q T

R V

S R

T U

14

M

Disables Shut Down Mode
Enables Shut Down Mode

Increases or decreases the source level.
Cycles through the 2-, 3-, and 4-wire selections.
Moves through the memory locations of calibrator setups.
In Contrast Adjustment mode; up-darkens contrast, down-lightens contrast.

Retrieves a previous calibrator setup from a memory location.

Saves the Calibrator setup. Saves Contrast Adjust setup.

Cycles the Calibrator through MEASURE and SOURCE modes in the lower display.

Selects the TC (thermocouple) measurement and sourcing function in the lower display.
Repeated pushes cycle through the thermocouple types.

Toggles between voltage, mA sourcing, or mA simulate functions in the lower display.

Selects RTD (resistance temperature detector) measurement and sourcing function in lower
display. Repeated pushes cycle through the RTD types.

Selects the pressure measurement and sourcing function. Repeated pushes cycle through the
different pressure units.

Mulitfunction Process Calibrator
Getting Acquainted with the Calibrator

Display

Figure 4 shows the elements of the display.

Loop

Annunciator

Memory Locations

for Calibrator Setups

Low Battery

Symbol

Units
Display

Mode

Indicator

Auto
Ramp

sh07f.eps

Figure 4. Elements of a Typical Display

15

725Ex

Users Manual

Getting Started

This section introduces some basic operations of the
Calibrator.

Proceed as follows to perform a voltage-to-voltage test:

1. Connect the Calibrator’s voltage output to its voltage
input as shown in Figure 5.

2. Press O to turn on the Calibrator. Press l to
select dc voltage (upper display).

3. If necessary, press
display). The Calibrator is still measuring dc voltage;
the active measurements are visible in the upper
display.

M for SOURCE mode (lower

4. Press

5. Press

6. Press

7. Press

V to select dc voltage sourcing.

Y and Z to select a digit to change. Press X

to select 1 V for the output value. Press and hold J
to enter 1 V as the 0 % value.

X to increase the output to 5 V. Press and

G to enter 5 V as the 100 % value.

hold

H and I to step between 0 and 100 % in

25 % step increments.

Shut Down Mode

The calibrator comes with the Shut Down mode enabled
for a time duration set to 30 minutes (displayed for about
1 second when the calibrator is initially turned on). When
the Shut Down mode is enabled, the calibrator will
automatically shut down after the time duration has
elapsed from the time the last key was pressed. To
disable the Shut Down mode, press O and Y
simultaneously. To enable the mode, press O and Z
simultaneously. To adjust the time duration, press O and
Z simultaneously, then press X and/or W to adjust the
time between 1 and 30 minutes.

16

Mulitfunction Process Calibrator
Shut Down Mode

MULTIFUN

CTION

725Ex

PROCESS CALIBRATOR

V mA

LO

O

ZERO

P

V mA

MEAS

SOURCE

TC

STORE

Zone 0 AEx ia IIB 171 C

I.S. Class I Div 1, Groups B,C,D

SETUP

RE

C

A

LL

2004.1573266
LR110460

Hz

RTD

C

F

˚

˚

100%

25%

25%

0%

aly39f.eps

Figure 5. Voltage-to-Voltage Test

17

725Ex

Users Manual

Contrast Adjustment

To adjust the contrast, proceed as follows:

1. Press C and O until Contst Adjust is displayed as
shown in Figure 6.

2. Press and hold X to darken contrast.

3. Press and hold W to lighten contrast.

4. Press S to save the contrast level.

MULTIFUNCTION

725Ex

PROCESS CALIBRATOR

1

V mA

TC RTD

2004.1573266
LR110460

Zone 0 AEx ia IIB 171 C

I.S. Class I Div 1, Groups B,C,D

ZERO

Hz

C °F

°

100%

25%

25%

0%

2

V mA

LOOP

MEAS

SOURCE

STORE
SETUP

RECALL

4

3

18

Figure 6. Adjusting the Contrast

sh06f.eps

Mulitfunction Process Calibrator
Using Measure Mode

Using Measure Mode

Measuring Electrical Parameters (Upper Display)

MULTIFUNCTION

725Ex

MEAS

SETUP

V mA

LOOP

V mA

I.S. Class I Div 1, Groups B,C,D

PROCESS CALIBRATOR

TC RTD

2004.1573266
LR110460

Zone 0 AEx ia IIB 171 C

ZERO

Hz

C ˚F

˚

100%

25%

25%

0%

Black

Red

To measure the current or voltage output of a transmitter,
or to measure the output of a pressure instrument, use the
upper display and proceed as follows:

1. Press

l to select volts or current. LOOP should

not be on.

2. Connect the leads as shown in Figure 7.

Current Measurement with Loop Power

The loop power function activates a 12-V supply in series
with the current measuring circuit, allowing the user to test
a transmitter when it is disconnected from plant wiring. To
measure current with loop power, proceed as follows:

1. Connect the Calibrator to the transmitter current loop
terminals as shown in Figure 8.

2. Press

l while the Calibrator is in current

measurement mode. LOOP appears and an internal
12-V loop supply turns on.

SOURCE

STORE

RECALL

aly42f.eps

Figure 7. Measuring Voltage and Current Output

19

725Ex

Users Manual

725Ex

MULTIFUNCTION
PROCESS CALIBRATOR

Red

20

MEAS

SOURCE

STORE

SETUP

RECALL

V mA

LOOP

V mA

I.S. Class I Div 1, Groups B,C,D

TC RTD

2004.1573266
LR110460

Zone 0 AEx ia IIB 171 C

ZERO

Hz

C ˚F

˚

100%

25%

25%

0%

TEST DC PWR

+–+–

–+

Black

aly18f.eps

Figure 8. Connections for Supplying Loop Power

Mulitfunction Process Calibrator
Using Measure Mode

Measuring Electrical Parameters (Lower Display)

To measure the electrical parameters using the lower
display, proceed as follows:

1. Connect the Calibrator as shown in Figure 9.

2. If necessary, press

M for MEASURE mode (lower

display).

3. Press

V for dc voltage or current, or F for

frequency or resistance.

MEAS

SOURCE

STORE

SETUP

RECALL

V mA

LOOP

MULTIFUNCTION
PROCESS CALIBRATOR

725Ex

V mA

TC RTD

2004.1573266
LR110460

Zone 0 AEx ia IIB 171 C

I.S. Class I Div 1, Groups B,C,D

ZERO

Hz

C ˚F

˚

100%

25%

25%

0%

aly43f.eps

Figure 9. Measuring Electrical Parameters

21

725Ex

Users Manual

Measuring Temperature

Using Thermocouples

The Calibrator supports twelve standard thermocouples,
including types E, N, J, K, T, B, R, S, L, XK, BP, and U.
Table 5 summarizes the ranges and characteristics of the
supported thermocouples.

To measure temperature using a thermocouple, proceed
as follows:

1. Attach the thermocouple leads to the appropriate TC
miniplug, then to the TC input/output as shown in
Figure 10.

WCaution

One thermocouple pin is wider than the other. To
avoid possible damage to Calibrator or to
equipment under test do not try to force a
miniplug in the wrong polarization.

Note

If the Calibrator and the thermocouple plug are at
different temperatures, wait one minute or more
for the connector temperature to stabilize after
plugging the miniplug into the TC input/output.

2. If necessary, press

3. Press

T for the TC display. Continue pressing this

key to select the desired thermocouple type.
If necessary, toggle between °C or °F temperature

units by pressing D.

M for MEASURE mode.

22

Mulitfunction Process Calibrator
Using Measure Mode

Table 5. Thermocouple Types Accepted

Positive Lead (H)

Type Positive Lead Material

E Chromel Purple Violet Constantan -200 to 950

N Ni-Cr-Si Orange Pink Ni-Si-Mg -200 to 1300

J Iron White Black Constantan -200 to 1200

K Chromel Yellow Green Alumel -200 to 1370

T Copper Blue Brown Constantan -200 to 400

B Platinum (30 % Rhodium) Gray Platinum (6 % Rhodium) 600 to 1800

R Platinum (13 % Rhodium) Black Orange Platinum -20 to 1750

S Platinum (10 % Rhodium) Black Orange Platinum -20 to 1750

L Iron Constantan -200 to 900

U Copper Constantan -200 to 400

XK

BP 95 % W + 5 % Re Red or Pink 80 % W + 20 % Re 0 to 2500

*American National Standards Institute (ANSI) device negative lead (L) is always red.

**International Electrotechnical Commission (IEC) device negative lead (L) is always white.

90.5 % Ni + 9.5 % Cr

Color

ANSI* IEC**

GOST

Violet or Black

Negative Lead

Material

56 % Cu + 44 % Ni

Specified Range

(°C)

-200 to 800

23

725Ex

Users Manual

mA

3W

mA
4W

30V 24mA MAX ALL TERMINALS

SOURCE / MEASURE

+

-

V
Hz

RTD

COM COM

MEASURE

V

TC

mA

LOOP

TC

Process Temperature

Warning

24

TC Miniplug

30 V maximum to

Figure 10. Measuring Temperature with a Thermocouple

aly12f.eps

Mulitfunction Process Calibrator
Using Measure Mode

Using Resistance-Temperature Detectors (RTDs)

The Calibrator accepts RTD types shown in Table 6. RTDs
are characterized by their resistance at 0 °C (32 °F), which
is called the “ice point” or R0. The most common R0 is 100
Ω. The Calibrator accepts RTD measurement inputs in
two-, three-, or four-wire connections, with the three-wire
connection the most common. A four-wire configuration
provides the highest measurement precision, and two-wire
provides the lowest measurement precision.

To measure temperature using an RTD input, proceed as
follows:

1. If necessary, press

2. Press

3. Press

4. Attach the RTD to input terminals as shown in

5. If necessary, toggle between °C or °F temperature

R for the RTD display. If desired, continue

pressing this key to select the desired RTD type.

X or W to select a 2-, 3-, or 4- wire

connection.

Figure 11.

units by pressing

M for MEASURE mode.

D.

25

725Ex

Users Manual

Table 6. RTD Types Accepted

RTD Type Ice Point (R

) Material α Range (°C)

0

Pt100 (3926) 100 Ω Platinum 0.003926 Ω/°C -200 to 630
Pt100 (385) 100 Ω Platinum 0.00385 Ω/°C -200 to 800
Ni120 (672) 120 Ω Nickel 0.00672 Ω/°C -80 to 260
Pt200 (385) 200 Ω Platinum 0.00385 Ω/°C -200 to 630
Pt500 (385) 500 Ω Platinum 0.00385 Ω/°C -200 to 630
Pt1000 (385) 1000 Ω Platinum 0.00385 Ω/°C -200 to 630
Pt100 (3916) 100 Ω Platinum 0.003916 Ω/°C -200 to 630

The IEC standard RTD and the most commonly used RTD in U.S. industrial applications is the Pt100 (385), α = 0.00385
Ω/°C.

26

Mulitfunction Process Calibrator
Using Measure Mode

30V 24mA MAX ALL TERMINALS

2W

SOURCE / MEASURE

+

mA

3W

-

mA
4W

V
Hz

RTD

COM COM

MEASURE

V

TC

mA

LOOP

RTD

Resistance to
be measured

3W

4W

30V 24mA MAX ALL TERMINALS

SOURCE / MEASURE

+

mA

3W

-

mA
4W

30V 24mA MAX ALL TERMINALS

SOURCE / MEASURE

+

mA

3W

-

mA
4W

V

TC

Hz
RTD

COM COM

V

TC

Hz
RTD

COM COM

mA

LOOP

mA

LOOP

MEASURE

V

MEASURE

V

RTD

Resistance to
be measured

RTD

Resistance to
be measured

aly15f.eps

Figure 11. Measuring Temperature with an RTD, Measuring 2-, 3-, and 4-Wire Resistance

27

725Ex

Users Manual

Measuring Pressure

Many ranges and types of pressure modules are available
from Fluke. See “Accessories” near the back of this
manual. Before using a pressure module, read its
instruction sheet. The modules vary in use, media, and
accuracy.

Figure 12 shows the Gage and Differential modules.
Differential modules also work in gage mode by leaving
the low fitting open to atmosphere.

To measure pressure, attach the appropriate pressure
module for the process pressure to be tested

Proceed as follows to measure pressure:

W Warning

Use only Fluke 700PEx series pressure modules.
To avoid a violent release of pressure in a

pressurized system, shut off the valve and slowly
bleed off the pressure before attaching the
pressure module to the pressure line.

Gage

PRESSURE MODULE

RANGE

BURST PRESSURE 300 PSIG

Differential

PRESSURE MODULE

RANGE

BURST PRESSURE 45 PSIG

HighLow

Figure 12. Gage and Differential Pressure Modules

WCaution

• To avoid mechanically damaging the pressure

module, never apply more than 10 ft.-lb. (13.5
Nm) 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.

• To avoid damaging the pressure module from

overpressure, never apply pressure above the
rated maximum printed on the pressure
module.

aly11f.eps

28

Mulitfunction Process Calibrator
Using Measure Mode

• To avoid damaging the pressure module from

corrosion, use it only with specified materials.
Refer to the printing on the pressure module
or the pressure module instruction sheet for
the acceptable material compatibility.

1. Connect a pressure module to the Calibrator as
shown in Figure 13. The threads on the pressure
modules accept standard ¼ NPT pipe fittings. Use the
supplied ¼ NPT to ¼ ISO adapter if necessary.

2. Press

3. Zero the pressure module as described in the

A. The Calibrator automatically senses

which pressure module is attached and sets its range
accordingly.

module’s instruction sheet. Modules vary in zeroing
procedures depending on module type, but all require
pressing

If desired, continue pressing
display units to psi, mmHg, inHg, cmH2O@4 °C,
cmH2O@20 °C, inH2O@4 °C, inH2O@20 °C,
inH2O@60 °F, mbar, bar, kg/cm2, or kPa.

K.

A to change pressure

Zeroing with Absolute Pressure Modules

To zero, adjust the Calibrator to read a known pressure.
This can be barometric pressure, if it is accurately known.
An accurate pressure standard can also apply a pressure
within range for any absolute pressure module. To adjust
the Calibrator reading, proceed as follows:

1. Press K, REF Adjust will appear to the right of the

pressure reading.

2. Use X to increase or W to decrease the Calibrator

reading to equal the reference pressure.

3. Press Kagain to exit zeroing procedure.

The Calibrator stores and automatically reuses the zero
offset correction for one absolute pressure module so that
the module is not rezeroed every time it is used.

29

725Ex

Users Manual

725Ex

MULTIFUNCTION
PROCESS CALIBRATOR

Isolation

Valve

Gage

Module

30

MEAS

SOURCE

STORE
SETUP

RECALL

V mA

LOOP

V mA

TC RTD

2004.1573266
LR110460

Zone 0 AEx ia IIB 171 C

I.S. Class I Div 1, Groups B,C,D

ZERO

Hz

C ˚F

˚

100%

25%

25%

0%

Differential

Module

HL

Tank

aly37f.eps

Figure 13. Connections for Measuring Pressure

Mulitfunction Process Calibrator
Using Source Mode

Using Source Mode

In SOURCE mode, the Calibrator generates calibrated
signals for testing and calibrating process instruments;
supplies voltages, currents, frequencies, and resistances;
simulates the electrical output of RTD and thermocouple
temperature sensors; and measures gas pressure from
an external source, creating a calibrated pressure source.

Sourcing 4 to 20 mA

To select the current sourcing mode, proceed as follows:

1. Connect the test leads in the mA terminals (left
column).

2. If necessary, press

3. Press

V for current and enter the desired current

by pressing X and W keys. Press Y and Z to select
a different digit to change.

Simulating a 4- to 20-mA Transmitter

Simulate is a special mode of operation in which the
Calibrator is connected into a loop in place of a
transmitter and supplies a known, settable test current.
Proceed as follows:

1. Connect the 12-V-loop-power source as shown in
Figure 14.

2. If necessary, press

3. Press

V until both mA and SIM display.

M for SOURCE mode.

M for SOURCE mode.

4. Enter the desired current by pressing
keys.

X and W

Sourcing Other Electrical Parameters

Volts, ohms, and frequency are also sourced and shown
in the lower display.

To select an electrical sourcing function, proceed as
follows:

1. Connect the test leads as shown in Figure 15,
depending on the source function.

2. If necessary, press

3. Press

4. Enter the desired output value by pressing

V for dc voltage, or F for frequency or

resistance.

Mfor SOURCE mode.

X and

W keys. Press Y and Z to select a different digit to

change.

31

725Ex

Users Manual

725Ex

MULTIFUNCTION
PROCESS CALIBRATOR

32

V mA

TC RTD

2004.1573266
LR110460

Zone 0 AEx ia IIB 171 C

I.S. Class I Div 1, Groups B,C,D

ZERO

Hz

C ˚F

˚

100%

25%

25%

0%

Black

Loop

Power

V mA

LOOP

MEAS

Red

+

SOURCE

STORE

SETUP

RECALL

Supply

Readout or

Controller

–

Refer to Fluke 725Ex CCD Control Drawing when using in an Ex hazardous area.

Figure 14. Connections for Simulating a 4 to 20- mA Transmitter in a non-Ex hazardous Area

aly17f.eps

Mulitfunction Process Calibrator
Using Source Mode

mA

30V 24mA MAX ALL TERMINALS

SOURCE / MEASURE

+ mA

+

mA

Red

+

3W

-

mA

4W

V
Hz

RTD

COM COM

MEASURE

V

TC

mA

LOOP

–

V

+

Device Under Test

Hz

Black

Red

30V 24mA MAX ALL TERMINALS

SOURCE / MEASURE

+

mA
3W

-

mA

4W

Common

V

TC

mA

Hz

LOOP

RTD

COM COM

MEASURE

V

–

Black

Refer to Fluke 725Ex CCD Control Drawing when using in an Ex hazardous area.

Figure 15. Electrical Sourcing Connections

33

Common

aly16f.eps

725Ex

Users Manual

Simulating Thermocouples

Connect the Calibrator TC input/output to the instrument
under test with thermocouple wire and the appropriate
thermocouple mini-connector (polarized thermocouple plug
with flat, inline blades spaced 7.9 mm [0.312 in] center to
center).

WCaution

One pin is wider than the other. Do not try to force
a miniplug in the wrong polarization.

Figure 16 shows this connection. Proceed as follows to
simulate a thermocouple:

1. Attach the thermocouple leads to the appropriate TC
miniplug, then to the TC input/output as shown in
Figure 16.

2. If necessary, press

3. Press

4. Enter the desired temperature by pressing

T for the TC display. If desired, continue

pressing this key to select the desired thermocouple
type.

keys. Press Y and Z to select a different digit to edit.

M for SOURCE mode.

X and W

Simulating RTDs

Connect the Calibrator to the instrument under test as
shown in Figure 17. Proceed as follows to simulate an
RTD:

1. If necessary, press

2. Press

3. Enter the desired temperature by pressing

R for the RTD display.

Use the 3W and 4W terminals for measurement
only, not for simulation. The Calibrator simulates
a 2-wire RTD at its front panel. To connect to a 3­wire or 4-wire transmitter, use the stacking cables
to provide the extra wires. See Figure 17.

keys. Press Y and Z to select a different digit to edit.

M for SOURCE mode.

Note

X and W

34

Mulitfunction Process Calibrator
Using Source Mode

MULTIFUNCTION

725Ex

PROCESS CALIBRATOR

TEST DC PWR

Color depends

on type of TC

++–

V mA

TC RTD

2004.1573266
LR110460

Zone 0 AEx ia IIB 171 C

I.S. Class I Div 1, Groups B,C,D

ZERO

Hz

C ˚F

˚

100%

25%

25%

0%

TC

–+

MEAS

SOURCE

STORE

SETUP

RECALL

V mA

LOOP

TC Miniplug

Refer to Fluke 725Ex CCD Control Drawing when using in an Ex hazardous area.

aly20f.eps

Figure 16. Connections for Simulating a Thermocouple

35

725Ex

Users Manual

Sensor Terminals

MULTIFUNCTION

725Ex

PROCESS CALIBRATOR

1

4

3

2

V mA

LO

OP

ZERO

V mA

MEAS

SOURCE

TC

STORE

Z

o

n

I.S

. C

SETUP

la

R

E

C

A

L

L

e
s

0

A

s

I D

2004.1573266
LR110460

E

x

ia

IIB

iv

1

, G

Hz

RTD

C

F

˚

˚

1

7

1

C

ro

u

p

s

B

,C

,D

10

0%

25%

25%

0%

Black

Red

Black

36

Refer to Fluke 725Ex CCD Control Drawing when using in an Ex hazardous area.

Figure 17. Connections for Simulating 3-Wire RTD

aly40f.eps

Mulitfunction Process Calibrator
Using Source Mode

Source Pressure Mode

The Calibrator can be used to monitor the pressure
supplied by a pump or other sources, and will display the
pressure in the SOURCE field. Figure 18 shows how to
connect a pump to a Fluke pressure module which makes
it a calibrated source.

Attach the appropriate pressure module for the process
pressure to be tested.

Proceed as follows to source pressure:

WWarning

• To avoid a violent release of pressure in a

pressurized system, shut off the valve and
slowly bleed off the pressure before attaching
the pressure module to the pressure line.

• Use only Fluke 700PEx – series pressure

modules.

WCaution

• To avoid mechanically damaging the pressure

module, never apply more than 10 ft.-lb.
(13.5 Nm) 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.

• To avoid damaging the pressure module from

overpressure, never apply pressure above the
rated maximum printed on the pressure
module.

• To avoid damaging the pressure module from

corrosion, use it only with specified materials.
Refer to the printing on the pressure module
or the pressure module instruction sheet for
the acceptable material compatibility.

37

725Ex

Users Manual

1. Connect a pressure module to the Calibrator as
shown in Figure 18. The threads on the pressure
modules accept standard ¼ NPT pipe fittings. Use the
supplied ¼ NPT to ¼ ISO adapter if necessary.

2. Press

U (lower display). The Calibrator

automatically senses which pressure module is
attached and sets its range accordingly.

3. Zero the pressure module as described in the
module’s Instruction Sheet. Modules vary in zeroing
procedures depending on module type.

4. Pressurize the pressure line with the pressure source
to the desired level as shown on the display.

If desired, continue pressing

U to change pressure

display units to psi, mmHg, inHg, cmH2O@4 °C,
cmH2O@20 °C, inH2O@4 °C, inH2O@20 °C,
inH2O@60 °F, mbar, bar, kg/cm2, or kPa.

MULTIFUNCTION

725Ex

PROCESS CALIBRATOR

ZERO

V mA

LOOP

V mA

TC RTD

2004.1573266
LR110460

Zone 0 AEx ia IIB 171 C

I.S. Class I Div 1, Groups B,C,D

Hz

C °F

°

100%

25%

25%

0%

MEAS

SOURCE

STORE

SETUP

RECALL

Pressure

Module

Hand
Pump

Figure 18. Connections for Sourcing Pressure

aly19f.eps

38

Mulitfunction Process Calibrator
Setting 0 % and 100 % Output Parameters

Setting 0 % and 100 % Output Parameters

For current output, the Calibrator assumes that 0 %
corresponds to 4 mA and 100 % corresponds to 20 mA.
For other output parameters, the 0 % and 100 % points
must be set before use of the step and ramp functions.
Proceed as follows:

1. If necessary, press

2. Select the desired source function and use the arrow
keys to enter the value. Our example is temperature
source using 100 °C and 300 °C values for source.

3. Enter 100 °C and press and hold
value.

4. Enter in 300 °C and press and hold
value.

M for SOURCE mode.

J to store the

G to store the

This setting may now be used for the following:

• Manually stepping an output with 25 % increments.

• Jump between the 0 and 100 % span points by

momentarily pushing

J or G.

Stepping and Ramping the Output

Two features are available for adjusting the value of
source functions.

• Stepping the output manually with the

keys, or in automatic mode.

• Ramping the output.

Stepping and ramping apply to all functions except
pressure, which requires use of an external pressure
source.

Manually Stepping the mA Output

To manually step current output, do the following:

• Use

• Touch momentarily either

H or I to step the current up or down in 25

% steps.

J to go to 0 %, or G to

go to 100 %.

H and I

39

725Ex

Users Manual

Auto Ramping the Output

Auto ramping gives the ability to continuously apply a
varying stimulus from the Calibrator to a transmitter, while
your hands remain free to test the response of the
transmitter.

L is pressed, the Calibrator produces a

When
continuously repeating 0 % - 100 % - 0 % ramp in a choice
of three ramp waveforms:

• E 0 % - 100 % - 0 % 40-second smooth ramp

• P 0 % - 100 % - 0 % 15-second smooth ramp

• N 0 % - 100 % - 0 % Stair-step ramp in 25 %

steps, pausing 5 seconds at each step. Steps are
listed in Table 7.

To exit ramping, press any button.

Table 7. mA Step Values

Step 4 to 20 mA

0 % 4.000
25 % 8.000
50 % 12.000
75 % 16.000
100 % 20.000

Storing and Recalling Setups

Store up to eight settings in a nonvolatile memory and
recall the settings for later use. A low battery condition or a
battery change does not jeopardize the stored settings.
Proceed as follows:

1. After creating a calibrator setup, press
display, the memory locations appear.

2. Press

3. Press

To recall setups, proceed as follows.

1. Press

2. Press

Y or Z to select locations one through eight. An

underscore appears below the selected memory
location.

S until the memory number disappears then

reappears. The setup is stored.

Q. The memory locations appear on the

display.

Y or Z to select the appropriate location and

press Q.

S. In the

40

Mulitfunction Process Calibrator
Calibrating a Transmitter

Calibrating a Transmitter

Use the measurement (upper display) and source (lower
display) modes to calibrate a transmitter. This section
applies to all but pressure transmitters. The following
example shows how to calibrate a temperature transmitter.

Connect the Calibrator to the instrument under test as
shown in Figure 19. Proceed as follows to calibrate a
transmitter

1. Press

2. Press

3. If necessary, press

l for current (upper display). If required,

press l again to activate loop power.

T (lower display). If desired, continue

pressing this key to select the desired thermocouple
type.

M for SOURCE mode.

4. Set the zero and span parameters by pressing

X and

W keys. Enter these parameters by pressing and

holding J and G. For more information on
setting parameters, see “Setting 0 % and 100 %”
earlier in this manual.

5. Press

6. Perform test checks at 0-25-50-75-100 % points by

Y or Z to select the appropriate location

pressing
necessary.

H or I. Adjust the transmitter as

41

725Ex

Users Manual

725Ex

MULTIFUNCTION
PROCESS CALIBRATOR

Red

42

MEAS

SOURCE

STORE

SETUP

RECALL

V mA

LOOP

V mA

TC RTD

2004.1573266
LR110460

Zone 0 AEx ia IIB 171 C

I.S. Class I Div 1, Groups B,C,D

ZERO

Hz

C ˚F

˚

100%

25%

25%

0%

TEST DC PWR

+–+–

–+

Black

Refer to Fluke 725Ex CCD Control Drawing when using in an Ex hazardous area.

aly44f.eps

Figure 19. Calibrating a Thermocouple Transmitter

Mulitfunction Process Calibrator
Calibrating a Pressure Transmitter

Calibrating a Pressure Transmitter

The following example shows how to calibrate a pressure
transmitter.

Connect the Calibrator to the instrument under test as
shown in Figure 20. Proceed as follows:

1. Press

2. Press

3. If necessary, press

4. Zero the pressure module.

5. Perform checks at 0 % and 100 % of span and adjust

l for current (upper display). If required,

press l again to activate loop power.

U (lower display).

M for SOURCE mode.

the transmitter as necessary.

43

725Ex

Users Manual

Hand Pump

44

MEAS

SOURCE

STORE

SETUP

RECALL

V mA

LOOP

MULTIFUNCTION

725Ex

PROCESS CALIBRATOR

V mA

TC RTD

2004.1573266
LR110460

Zone 0 AEx ia IIB 171 C

I.S. Class I Div 1, Groups B,C,D

Measure mA
Source Pressure
12 V Loop Power
Enabled

ZERO

Hz

C ˚F

˚

100%

25%

25%

0%

Pressure

Module

Red

+

SIGNAL

–

TEST

Black

Refer to Fluke 725Ex CCD Control Drawing when using in an Ex hazardous area.

aly34f.eps

Figure 20. Calibrating a Pressure-to-Current (P/I) Transmitter

Mulitfunction Process Calibrator
Calibrating an I/P Device

Calibrating an I/P Device

The following test allows calibration of a device that
controls pressure. Proceed as follows:

1. Connect the test leads to the instrument under test as
shown in Figure 21. The connections simulate a
current-to-pressure transmitter and measures the
corresponding output pressure.

2. Press

3. Press

4. If necessary, press

5. Enter the desired current by pressing

A (upper display).
V for sourcing current (lower display).

M for SOURCE mode.

X and W

keys. Press Y and Z to select different digits.

45

725Ex

Users Manual

46

MEAS

SOURCE

STORE
SETUP

RECALL

V mA

LOOP

MULTIFUNCTION

725Ex

PROCESS CALIBRATOR

V mA

TC RTD

2004.1573266
LR110460

Zone 0 AEx ia IIB 171 C

I.S. Class I Div 1, Groups B,C,D

Measure
Pressure
Source mA

+

SIGNAL

–

TEST

Pressure

ZERO

Hz

C ˚F

˚

100%

25%

25%

0%

Module

Red

Black

Refer to Fluke 725Ex CCD Control Drawing when using in an Ex hazardous area.

aly28f.eps

Figure 21. Calibrating a Current-to-Pressure (I/P) Transmitter

Mulitfunction Process Calibrator
Switch Test

Switch Test

To perform a switch test, follow these steps:

Note

This example used a normally closed switch.
The procedure is the same for an open switch
but the display reads OPEN instead of CLOSE.

1. Connect the Calibrator mA and COM terminals to the
switch using the pressure switch terminals and
connect the pump from the Calibrator to the pressure
switch. The polarity of the terminals does not matter.

2. Make sure the vent on the pump is open and zero the
Calibrator if necessary. Close the vent after zeroing
the Calibrator.

3. Press and hold the upper display A button for
three seconds to enter switch test mode. The upper
main display indicates the applied pressure, CLOSE
will be displayed to the right of the pressure reading
to indicate closed contacts

4. Apply pressure with the pump slowly until the switch
opens.

Note

Pressure the device slowly to ensure accurate
readings. Run the test several times to confirm
repeatability.

5. OPEN displays once the switch is open. Bleed the
pump slowly until the pressure switch closes.
RECALL appears on the display.

6. Press A to read the pressure values for when the
switch opened, for when it closed, and for the
deadband.

7. Hold A for three seconds to exit the switch test or
press l to clear the switch test and rerun the test.

47

725Ex

Users Manual

Testing an Output Device

Use the source functions to test and calibrate actuators,
recording, and indicating devices. Proceed as follows:

1. Connect the test leads to the instrument under test
as shown in Figure 22.

2. Press

3. If necessary, press

V for current or dc voltage, or F for

frequency or resistance (lower display).

M for SOURCE mode.

MULTIFUNCTION

725Ex

PROCESS CALIBRATOR

V mA

TC RTD

2004.1573266
LR110460

Zone 0 AEx ia IIB 171 C

I.S. Class I Div 1, Groups B,C,D

ZERO

Red

MEAS

SOURCE

STORE
SETUP

RECALL

V mA

LOOP

0 to 1 V dc

Input

Black

Refer to Fluke 725Ex CCD Control Drawing
when using in an Ex hazardous area.

Figure 22. Calibrating a Chart Recorder

Hz

C ˚F

˚

100%

25%

25%

0%

aly25f.eps

48

Mulitfunction Process Calibrator
Replacing the Batteries

Replacing the Batteries

WWarning

• To avoid false readings, which could lead to

possible electric shock or personal injury,
replace the batteries as soon as the battery
indicator (M) appears.

• Remove the Calibrator from the Ex-

hazardous area before opening the battery
door. See “Ex Hazardous Areas”.

Figure 23 shows how to replace the batteries.

Hex Key

Figure 23. Replacing the Batteries

sh38f.eps

49

725Ex

Users Manual

Approved Batteries

Table 8. Approved Batteries

Battery Manufacturer

(All Batteries Alkaline- AA 1.5 V)

Duracell MN1500

Eveready (Energizer) E91

Panasonic Powerline LR6A

Rayovac 815

Varta 4906

Ucar Gold LR6

Maintenance

Cleaning the Calibrator

Clean the Calibrator and pressure modules with a soft
cloth dampened with water or water and mild soap.

Type

Service Center Calibration or Repair

W Warning

To avoid personal injury or damage to the
Calibrator, use only the specified replacement
parts and do not allow water into the case.

W Caution

To avoid damaging the plastic lens and case, do
not use solvents or abrasive cleansers.

Calibration, repairs, or servicing must be performed only
by qualified service personnel. If the Calibrator fails,
check the batteries first, and replace them if needed.

Verify that the Calibrator is being operated in accordance
with the instructions in this manual. If the Calibrator is
faulty, send a description of the failure with the Calibrator.
Pressure modules do not need to accompany the

50

Mulitfunction Process Calibrator
Maintenance

Calibrator unless the module is faulty also. Be sure to
pack the Calibrator securely, using the original shipping
container if it is available. Send the equipment postage
paid and insured, to the nearest Service Center. Fluke
assumes no responsibility for damage in transit.

The Fluke 725Ex Calibrator covered by the warranty will
be promptly repaired or replaced (at Fluke’s option) and
returned to you at no charge. See the back of the title
page for warranty terms. If the warranty period has
expired or the operating limits are exceeded, the

Calibrator will be repaired and returned for a fixed fee. If
the Calibrator or pressure module is not covered under
the warranty terms, contact an authorized service center
for a price quote for repair.

To locate an authorized service center or order
replacement parts, refer to “Contacting Fluke” at the
beginning of the manual.

Replacement Parts

Table 9 lists the part number of each replaceable part.

51

725Ex

Users Manual

Table 9. Replacement Parts

Description PN Qty.

AA alkaline batteries See “Table 8. Approved Batteries” 4
Battery door 2097832 1
Accessory mount 2151981 1
Tilt stand 2097826 1
TL75 series test leads 855742 1
Test lead, red

Test lead, black
AC72 alligator clip, red

AC72 alligator clip, black
Input Decal 690948 1

Fluke 725Ex CD ROM, contains Fluke 725Ex
User Manual

Fluke 725Ex Control Drawing 6800032 1
Fluke 725Ex Safety Information 2151996 1
Fluke 725Ex Calibration Manual 2406553 1

688051
688066

1670641
1670652

2406548 1

1
1

1
1

52

Mulitfunction Process Calibrator
Accessories

Accessories

For more information about these accessories and their
prices, contact a Fluke representative. Pressure Modules
and Fluke model numbers (see Table 10) are listed
below. (Differential models also operate in gage mode.)
Contact a Fluke representative about new pressure
modules not listed here.

External Fluke Pressure Module Compatibility

The output of Fluke 700PEx pressure modules can cause
the 725Ex 5 digit display to overflow, or else produce
values that are too low to be read if inappropriate units
are selected. This is prevented by displaying OL on the
display per Table 10.

• 700HTP 0 to 10,000 PSI Pump

• 700PTP -11.6 to 600 PSI Pump

• 700TC1 and 700TC2 Thermocouple Mini-plug Kits

Table 10. Fluke Pressure Module Compatibility

Pressure Unit Module Compatibility

Psi Available on all pressure ranges

In. H20 All ranges through 3000 psi

cm. H20 All ranges through 1000 psi

Bar 15 psi and above

Mbar All ranges through 1000 psi

KPa Available on all pressure ranges

In.Hg. Available on all pressure ranges

mm. Hg All ranges through 1000 psi

Kg/cm2 15 psi and above

53

725Ex

Users Manual

Table 11. Pressure Modules

Fluke Model Number Range Type and Media

Fluke-700P01Ex 0 to 10” H2O differential, Low: dry High: dry

Fluke-700P24Ex 0 to 15 psi differential, Low: dry High: wet

Fluke-700P05Ex 0 to 30 psi gage, wet

Fluke-700P06Ex 0 to 100 psi gage, wet

Fluke-700P09Ex 0 to 1,500 psi gage, wet

Fluke-700P27Ex 0 to 300 psi gage, wet

Fluke-700P29Ex 0 to 3,000 psi gage, wet

Fluke-700PA4Ex 0 to 15 psi absolute, Low: dry High: wet

54

Multifunction Process Calibrator
Specifications

Specifications

All specifications apply from +18 °C to +28 °C unless
stated otherwise. All specifications assume a 5 minute
warmup period.

DC Voltage Measurement

Range Resolution

30 V
(upper
display)

10 V
(lower
display)

90 mV 0.01 mV 0.02 % + 2

Temperature coefficient -10 °C to 18 °C, +28 °C to
55 °C: ±0.005 % of range per °C

0.001 V 0.02 % + 2

0.001 V 0.02 % + 2

(% of Reading + Counts)

Accuracy,

DC Voltage Source

Range Resolution

100 mV 0.01 mV 0.02 % + 2

10 V 0.001 V 0.02 % + 2

Temperature coefficient -10 °C to 18 °C, +28 °C
to 55 °C: ±0.005 % of range per °C

Maximum load: 1 mA

(% of Reading + Counts)

Accuracy,

Millivolt Measurement and Source*

Range Resolution Accuracy

-10 mV to 75 mV 0.01 mV ±(0.025 % + 1 count)

Maximum input voltage: 30 V
Temperature coefficient -10 °C to 18 °C, +28 °C to

55 °C: ±0.005 % of range per °C

*Select this function by pressing T. The signal is

available at the thermocouple miniplug connector.

55

725Ex

Users Manual

DC mA Measurement and Source

Range Resolution

24 mA 0.001 mA

Temperature coefficient -10 °C to 18 °C, +28 °C to
55 °C: ±0.005 % of range per °C

Drive capability: 250 Ω at 20 mA

(% of Reading + Counts)

Accuracy,

0.02 % + 2

Ohms Measurement

Ohms Range

0 to 400 Ω 0.1 0.15
400 to 1.5 kΩ 0.5 1.0

1.5 to 3.2 kΩ 1 1.5

Temperature coefficient -10 °C to 18 °C, +28 °C to
55 °C: ±0.005 % of range per °C

Excitation Current: 0.2 mA
Maximum input voltage: 30 V

* 2-wire: Does not include lead resistance.
3-wire: Assumes matched leads with a total resistance not

exceeding 100 Ω.

Accuracy ± Ω*

4-Wire 2- and 3-Wire

Ohms Source

Ohms Range

15 to 400 Ω 0.15 to 0.5 mA 0.15
15 to 400 Ω 0.5 to 2 mA 0.1
400 to 1.5 kΩ 0.05 to 0.8 mA 0.5

1.5 to 3.2 kΩ 0.05 to 0.4 mA 1

Temperature coefficient -10 °C to 18 °C, +28 °C to
55 °C: ± 0.005 % of resistance range per °C

15 to 400 Ω 0.1 Ω
400 to 3.2 kΩ 1 Ω

Excitation Current from

Measurement Device

Resolution

Accuracy

± Ω

Frequency Measurement

Range Resolution Accuracy

2.0 to 1000.0 CPM 0.1 CPM ± (0.05 % + 1 count)

1 to 1000 Hz 1.0 Hz ± (0.05 % + 1 count)

1.0 to 10.0 kHz 0.1 kHz ± (0.05 % + 1 count)

Sensitivity: 1V peak-to-peak minimum
Waveform: squarewave

56

Multifunction Process Calibrator
Specifications

Frequency Source

Accuracy

Range Resolution

(% of output

frequency)

2.0 to 1000.0 CPM 0.1 CPM ± 0.05 %
1 to 1000 Hz 1 Hz ± 0.05 %

1.0 to 10.0 kHz 0.1 kHz ± 0.25 %
Waveform: 5 V p-p squarewave, -0.1 V offset

Temperature, Thermocouples

Type Range

J -200 to 0 °C

0 to 1200 °C

K -200 to 0 °C

0 to 1370 °C

T -200 to 0 °C

0 to 400 °C

E -200 to 0 °C

0 to 950 °C

R -20 to 0 °C

0 to 500 °C
500 to 1750 °C

S -20 to 0 °C

0 to 500 °C
500 to 1750 °C

Measure and Source

Accuracies

1.0 °C

0.7 °C

1.2 °C

0.8 °C

1.2 °C

0.8 °C

0.9 °C

0.7 °C

2.5 °C

1.8 °C

1.4 °C

2.5 °C

1.8 °C

1.5 °C

Type Range

B 600 to 800 °C

800 to 1000 °C
1000 to 1800 °C

L -200 to 0 °C

0 to 900 °C

U -200 to 0 °C

0 to 400 °C

N -200 to 0 °C

0 to 1300 °C

XK -200 to 100 °C

-100 to 800 °C

BP 0 to 800 °C

800 to 2500 °C

Resolution:

0.1 °C, 0.1 °F

Loop Power Supply

Voltage: 12 V

Maximum current: 24 mA

Short circuit protected

Measure and Source

Accuracies

2.2 °C

1.8 °C

1.4 °C

0.85 °C

0.7 °C

1.1 °C

0.75 °C

1.5 °C

0.9 °C

0.5 °C

0.6 °C

1.2 °C

2.5 °C

57

725Ex

Users Manual

RTD Excitation (simulation)

Allowable Excitation by RTD type

Ni 120 0.15 to 3.0 mA
Pt 100-385 0.15 to 3.0 mA
Pt 100-3926 0.15 to 3.0 mA
Pt 100-3916 0.15 to 3.0 mA
Pt 200-385 0.05 to 0.80 mA
Pt 500-385 0.05 to 0.80 mA
Pt 1000-385 0.05 to 0.40 mA

Temperature, RTD Ranges, and Accuracies

Accuracy

Type Range °C Measure 4-Wire °C Measure 2- and 3-Wire* °C Source °C

Ni120 -80 to 260 0.2 0.3 0.2
Pt100-385 - 200 to 800 0.33 0.5 0.33
Pt100-3926 -200 to 630 0.3 0.5 0.3
Pt100-3916 -200 to 630 0.3 0.5 0.3
Pt200-385 -200 to 250

250 to 630

Pt500-385 -200 to 500

500 to 630

Pt1000-385 -200 to 100

100 to 630

Resolution: 0.1 °C, 0.1 °F
RTD Source: Addresses pulsed transmitters and PLCs with pulses as short as 5 ms.

* 2-wire: Does not include lead resistance.
3-wire: Assumes matched leads with a total resistance not exceeding 100 Ω.

0.2

0.8

0.3

0.4

0.2

0.2

0.3

1.6

0.6

0.9

0.4

0.5

0.2

0.8

0.3

0.4

0.2

0.2

58

Multifunction Process Calibrator
Specifications

Pressure Measurement

Range Resolution Accuracy Units

Determined by
pressure module

5 digits Determined by

pressure module

psi, inH2O@4 °C, inH2O@20 °C, inH2O@60 °F, kPa,
cmH2O@4 °C, cmH2O@20 °C, bar, mbar, kg/cm

, mmHg,

2

inHg

General Specifications

Operating temperature -10 °C to 55 °C
Storage temperature - 20 °C to 71 °C
Operating altitude 3000 meters above mean sea level
Pollution Degree 2
Relative Humidity

(% RH operating without condensation)

Vibration Random, 2 g, 5 to 500 Hz
Product Compliance Markings

90 % (10 to 30 °C)
75 % (30 to 40 °C)
45 % (40 to 50 °C)
35 % (50 to 55 °C)
uncontrolled < 10 °C

P ( II 1 G EEx ia IIB 171 °C

0344 KEMA 04ATEX1303

) Class I Div. 1 Groups B,C, and D

LR110460 Class I Zone 0 Aex/Ex ia IIB 171 °C

2004.1573226

Ta = -10 °C… +55 °C
Manufactured by Martel Electronics, Inc., 1F Commons Drive

Londonderry, NH, USA

EMC EN 61326-1: 1997 + A1; 1998 + A2:2000, Criteria B
Power requirements 4 AA alkaline batteries- See “Approved Batteries”
Size 96 x 200 x 47 mm. (3.75 x 7.9 x 1.86 in)
Weight 650 gm (1 lb, 7 oz)

59

725Ex

Users Manual

Entity Parameters

For Entity Parameters, Refer to Fluke 725Ex CCD, Control Drawing for use in Ex hazardous areas.

60