724
Temperature Calibrator
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - TestEquipmentDepot.com
Users Manual
®
February 2000 Rev.1, 8/03
© 2000-2003 Fluke Corporation. All rights reserved.
All product names are trademarks of their respective companies.
Each Fluke product is warranted to be free from defects in material and workmanship under normal use and service. The warranty period is
LIMITED WARRANTY & LIMITATION OF LIABILITY
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
Table of Contents
Title Page
Introduction....................................................................................................................1
Contacting Fluke............................................................................................................ 1
Standard Equipment...................................................................................................... 3
Safety Information.......................................................................................................... 3
Getting Acquainted with the Calibrator .......................................................................... 8
Input and Output Terminals ...................................................................................... 8
Keys.......................................................................................................................... 10
Display ...................................................................................................................... 13
Getting Started .............................................................................................................. 14
Shut Down Mode ........................................................................................................... 14
Contrast Adjustment ...................................................................................................... 16
Using Measure Mode..................................................................................................... 17
Measuring Electrical Parameters (Upper Display) .................................................... 17
Current Measurement with Loop Power.................................................................... 17
Measuring Electrical Parameters (Lower Display) .................................................... 19
Measuring Temperature............................................................................................ 20
Using Thermocouples .......................................................................................... 20
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Users Manual
Using Resistance-Temperature Detectors (RTDs) ............................................... 23
Using Source Mode........................................................................................................ 26
Sourcing Electrical Parameters ................................................................................. 26
Simulating Thermocouples........................................................................................ 27
Simulating RTDs........................................................................................................ 27
Setting 0 % and 100 % Output Parameters ................................................................... 30
Stepping and Ramping the Output................................................................................. 30
Manually Stepping the Output ................................................................................... 30
Auto Ramping the Output.......................................................................................... 31
Storing and Recalling Setups......................................................................................... 31
Calibrating a Transmitter................................................................................................ 32
Testing an Output Device............................................................................................... 34
Replacing the Batteries .................................................................................................. 35
Replacing the Fuse ........................................................................................................ 35
Maintenance................................................................................................................... 36
Cleaning the Calibrator.............................................................................................. 36
Service Center Calibration or Repair......................................................................... 36
Replacement Parts.................................................................................................... 37
Specifications ................................................................................................................. 39
DC Voltage Measurement ......................................................................................... 39
DC Voltage Source.................................................................................................... 39
DC mA Measurement................................................................................................ 39
Ohms Measurement.................................................................................................. 40
Ohms Source............................................................................................................. 40
Millivolt Measurement and Source*........................................................................... 41
Temperature, Thermocouples ................................................................................... 41
Temperature, RTD Ranges, and Accuracies (ITS-90)............................................... 42
Loop Power Supply ................................................................................................... 43
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Temperature Calibrator
Contents
General Specifications.............................................................................................. 43
Index ....................................................................................................................................... 45
(continued)
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List of Tables
Table Title Page
1. Summary of Source and Measure Functions........................................................................ 2
2. International Symbols ........................................................................................................... 7
3. Input/Output Terminals and Connectors............................................................................... 9
4. Key Functions ....................................................................................................................... 11
5. Thermocouple Types Accepted ............................................................................................ 21
6. RTD Types Accepted............................................................................................................24
7. Replacement Parts ............................................................................................................... 37
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List of Figures
Figure Title Page
1. Standard Equipment ............................................................................................................. 6
2. Input/Output Terminals and Connectors............................................................................... 8
3. Keys...................................................................................................................................... 10
4. Elements of a Typical Display............................................................................................... 13
5. Voltage-to-Voltage Test ........................................................................................................ 15
6. Adjusting the Contrast .......................................................................................................... 16
7. Measuring Voltage and Current Output ................................................................................ 17
8. Connections for Supplying Loop Power................................................................................ 18
9. Measuring Electrical Parameters.......................................................................................... 19
10. Measuring Temperature with a Thermocouple ..................................................................... 22
11. Measuring Temperature with an RTD, Measuring 2-, 3-, and 4-Wire Resistance ................ 25
12. Electrical Sourcing Connections ........................................................................................... 26
13. Connections for Simulating a Thermocouple........................................................................ 28
14. Connection for Simulating a 3-Wire RTD.............................................................................. 29
15. Calibrating a Thermocouple Transmitter............................................................................... 33
16. Calibrating a Chart Recorder ................................................................................................ 34
17. Replacing the Batteries......................................................................................................... 36
18. Replacement Parts ............................................................................................................... 38
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viii
Introduction
Your Fluke 724 Temperature Calibrator is a handheld,
battery-operated instrument that measures and sources a
variety of thermocouples and RTDs. 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 you
to measure volts and current. The lower display
allows you to measure and source volts, resistance
temperature detectors, thermocouples, and ohms.
• A thermocouple (TC) input/output terminal and
internal isothermal block with automatic referencejunction temperature compensation.
• Storage and recall of 8 setups.
• Manual stepping and automatic stepping and
ramping.
Temperature Calibrator
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Users Manual
Table 1. Summary of Source and Measure Functions
Function Measure Source
dc V 0 V to30 V 0 V to10 V
Resistance 0 Ω to 3200 Ω 15 Ω to 3200 Ω
Thermocouple Types E, J, K, T, B, R, S, L, U, N, mV
RTD
(ResistanceTemperature
Detector)
Other functions Loop supply, Step, Ramp, Memory, Dual display
Pt100 Ω (385)
Pt100 Ω (3926)
Pt100 Ω (3916)
Pt200 Ω (385)
Pt500 Ω (385)
Pt1000 Ω (385)
Ni120
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Temperature Calibrator
Standard Equipment
Standard Equipment
The items listed below and shown in Figure 1 are included
with your calibrator. If the calibrator is damaged or
something is missing, contact the place of purchase
immediately. To order replacement parts or spares, see
the user-replaceable parts list in Table 7.
• TL75 test leads (one set)
• Alligator clips (one set)
• Stackable alligator clip test leads (one set)
• 724 Product Overview Manual
• 724 CD-ROM (contains Users Manual)
• Spare fuse
Safety Information
The calibrator is designed in accordance with IEC1010-1,
ANSI/ISA S82.01-1994 and CAN/CSA C22.2 No. 1010.1-
92. Use the calibrator only as specified in this manual,
otherwise the protection provided by the calibrator may be
impaired.
A Warning identifies conditions and actions that pose
hazard(s) to the user; a Caution identifies conditions and
actions that may damage the calibrator or the equipment
under test.
International symbols used on the calibrator and in this
manual are explained in Table 2.
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Users Manual
W Warning
To avoid possible electric shock or personal injury:
• Do not apply more than the rated voltage, as marked on the calibrator, between the terminals, or
between any terminal and earth ground. Maximum for all terminals is 30 V, 24 mA.
• Before each use, verify the calibrator’s operation by measuring a known voltage.
• Follow all equipment safety procedures.
• Never touch the probe to a voltage source when the test leads are plugged into the current terminals.
• Do not use the calibrator if it is damaged. Before you use the calibrator, inspect the case. Look for
cracks or missing plastic. Pay particular attention to the insulation surrounding the connectors.
• Select the proper function and range for your measurement.
• Make sure the battery door is closed and latched before you operate the calibrator.
• Remove test leads from the calibrator before you open the battery door.
• Inspect the test leads for damaged insulation or exposed metal. Check test leads continuity. Replace
damaged test leads before you use the calibrator.
• When using the probes, keep your fingers away from the probe contacts. Keep your fingers behind the
finger guards on the probes.
• Connect the common test lead before you connect the live test lead. When you disconnect test leads,
disconnect the live test lead first.
• Do not use the calibrator if it operates abnormally. Protection may be impaired. When in doubt, have the
calibrator serviced.
• Do not operate the calibrator around explosive gas, vapor, or dust.
4
Temperature Calibrator
Safety Information
W Warning
• Use only 4 AA batteries, properly installed in the calibrator case, to power the calibrator.
• Disconnect test leads before changing to another measure or source function.
• When servicing the calibrator, use only specified replacement parts.
• 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.
Caution
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 your measurement or sourcing application.
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Users Manual
Alligator Clips
Test Lead Set
TL75
mA
4W
Stackable
Test Leads
Figure 1. Standard Equipment
SOURCE / MEASURE
3W
-
STORE
SETUP
RECALL
30V MAX ALL TERMINALS
V
RTD
COM
100%
25%
25%
0%
MEASURE
V
TC
mA
LOOP
COM
zi01f.eps
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Temperature Calibrator
Safety Information
Table 2. International Symbols
AC - Alternating current Double insulated
DC - Direct current Battery
Earth ground Refer to the manual for information about
this feature.
Pressure
Conforms to Canadian Standards
Association directives
O
ON/OFF
Conforms to European Union directives
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