Fluke 724 Calibration Manual
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Fluke 724 Calibration Manual

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Chipsmall Limited consists of a professional team with an average of over 10 year of expertise in the distribution
of electronic components. Based in Hongkong, we have already established firm and mutual-benefit business
relationships with customers from,Europe,America and south Asia,supplying obsolete and hard-to-find components
to meet their specific needs.
With the principle of "Quality Parts,Customers Priority,Honest Operation,and Considerate Service",our business
mainly focus on the distribution of electronic components. Line cards we deal with include
Microchip,ALPS,ROHM,Xilinx,Pulse,ON,Everlight and Freescale. Main products comprise
IC,Modules,Potentiometer,IC Socket,Relay,Connector.Our parts cover such applications as commercial,industrial,
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Summary of Contents for Fluke 724

  • Page 1 Chipsmall Limited consists of a professional team with an average of over 10 year of expertise in the distribution of electronic components. Based in Hongkong, we have already established firm and mutual-benefit business relationships with customers from,Europe,America and south Asia,supplying obsolete and hard-to-find components to meet their specific needs.
  • Page 2 ® 724/725/726 Calibrators Calibration Manual PN 667581 September 1999 Rev. 3, 4/14 ©1999-2014 Fluke Corporation. All rights reserved. Printed in USA All product names are trademarks of their respective companies.
  • Page 3 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.

  • Page 4: Table Of Contents

    Millivolt Measurement and Source (724 and 725) ........7 Temperature, Thermocouples (724 and 725)..........7 Temperature, Thermocouples (726) .............. 8 Temperature, RTD Ranges, and Accuracies (724 and 725) ......9 RTD Accuracy (Read and Source) (ITS-90) (726)........10 Loop Power Supply ..................11 Pressure Measurement (725 and 726) ............
  • Page 5 Lower Display Ohms Source Tests ............... 39 Pressure Module Input (725/726) ..............40 Calibration Adjustment ..................40 Setup ......................40 Initiating Communication (724 and 725 with V2.xx and Lower Firmware) ...................... 42 Calibration Adjustment Procedures (724 and 725 with V2.xx and Lower Firmware) ..................43 Cal Volts Input ..................
  • Page 6 List of Tables Table Title Page International Symbols .................... 3 Upper Display Remote Commands (725 with V2.xx and lower) ......16 Lower Display Remote Commands (725) .............. 16 Remote Commands for Sensor Selection (725 with V2.xx and lower) ....17 Serial Command List-726 and 725 V3.00 and Later ..........
  • Page 7 724/725/726 Calibration Manual...
  • Page 8 List of Figures Figure Title Page Replacing the Batteries and Replaceable Fuses ............. 13 Upper Display Voltage Test Connections .............. 26 Lower Display mV and Voltage Test Connections ..........27 Upper Display mA Test Connections ..............29 Lower Display mA Test Connections ..............30 Lower Display Frequency Test Connections ............
  • Page 9 724/725/726 Calibration Manual...

  • Page 10: Introduction

    Do not perform the verification tests or calibration procedures described in this manual unless you are qualified to do This Calibration Manual provides the following information for the Fluke 724 Temperature Calibrator and the Fluke 725 and 726 Multifunction Process Calibrators (also referred to as "the Calibrator"...

  • Page 11: Read First - Safety Information

    724/725/726 Calibration Manual Read First – Safety Information In this calibration manual, 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 test instruments. ...

  • Page 12: International Symbols

    Product Category: With reference to the equipment types in the WEEE  Directive Annex I, this product is classed as category 9 "Monitoring and Control Instrumentation" product. Do not dispose of this product as unsorted municipal waste. Go to Fluke’s website for recycling information.

  • Page 13: Specifications

    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 DC mA Measurement and Source (724 and 725) (Measurement only for 724) Range Resolution...

  • Page 14: Dc Ma Measurement And Source (726)

    0.010 % + 2 µA Maximum load on, mA source is 1 kΩ. With the HART resistor on, maximum load is 750 Ω. Voltage input range on simulate mode is 5 to 30 V Ohms Measurement (724 and 725) Ohms Range Accuracy, 4-Wire Accuracy*, 2-Wire, or 3-Wire 0 Ω...

  • Page 15: Ohms Source (726)

    724/725/726 Calibration Manual Ohms Source (726) Accuracy Excitation Current from Ohms Range Minimum Maximum (% of Reading + Measurement Device Floor) 0.015 % + 0.1 Ω Ohms Source (low) 400.0 0.1 mA to 0.5 mA 0.015 % + 0.05 Ω...

  • Page 16: Frequency Source (726)

    1000.0 0.05 % 10.00 0.25 % kHz Source 10.00 15.00 0.50 % Millivolt Measurement and Source (724 and 725) 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 .

  • Page 17: Temperature, Thermocouples (726)

    724/725/726 Calibration Manual Temperature, Thermocouples (726) CJC ON CJC OFF Minimum Maximum Type Accuracy Accuracy (°C) (°C) (°C) (°C) -210 1200 -200 1000 1000 1372 -250 -250 -100 -100 1000 1767 1767 1000 1000 1820 1000 1000 2316 -200 0.45 0.25...

  • Page 18: Temperature, Rtd Ranges, And Accuracies (724 And 725)

    Calibrators Specifications Temperature, RTD Ranges, and Accuracies (724 and 725) Accuracy Type Range Measure Measure* (°C) 4-wire (°C) 2- and 3-wire (°C) Source (°C) Ni120 -80 to 260 Pt100-385 - 200 to 800 0.33 0.33 Pt100-392 -200 to 630 Pt100-JIS...

  • Page 19: Rtd Accuracy (Read And Source) (Its-90) (726)

    724/725/726 Calibration Manual RTD Accuracy (Read and Source) (ITS-90) (726) Range Minimum Maximum Accuracy Ni120 (672) -80.00 °C 260.00 °C 0.15 -200.00 °C 100.00 °C 0.15 100.00 °C 300.00 °C 0.25 Pt100 (385) 300.00 °C 600.00 °C 0.35 600.00 °C 800.00 °C...

  • Page 20: Loop Power Supply

    Calibrators Specifications Loop Power Supply Voltage: 24 V Maximum current: 22 mA Short circuit protected Pressure Measurement (725 and 726) Range Resolution Accuracy Units Mode (726 Only) Pushing  for 3 psi, inH O@4 °C, O@20 °C, kPa, seconds stores Determined by Determined by O@4 °C,...

  • Page 21: General Specifications

    724/725/726 Calibration Manual General Specifications Operating temperature 724 and 725 -10 °C to 55 °C -10 °C to 50 °C Storage temperature - 20 °C to 70 °C (limited by battery storage specifications) Stability ± 0.005 % of range/°C outside of 23 ± 5 °C...

  • Page 22: Replacing The Batteries

    Calibrator. Note Fuses are only in 724 and 725 Version 2.X and lower. Four AA alkaline batteries (ANSI/NEDA 15A or IEC LR6) are used to power the Calibrator. To replace the batteries, refer to Figure 1 and do the following: 1.

  • Page 23: Fuses

    Do not allow water into the case. • Note 724 and 725 Version 2.x and lower. Over time, the input protection has been modified to increase reliability. There will either be self-resetting fuses, or replaceable fuses in sockets. The self-resetting fuses open when heated by a current overload, and close when they cool down.

  • Page 24: Remote Control Interface (725 And 726)

    To activate the 725 with firmware V2.xx or lower remote control interface, proceed as follows: 1. Turn off the UUT; then use the Fluke 700SC serial interface cable to connect the UUT to a serial port on the PC. Push and hold 0% when the unit is turned on to find the firmware version of a 72x.
  • Page 25 724/725/726 Calibration Manual Table 2. Upper Display Remote Commands (725 with V2.xx and lower) Remote Command Description mA measurement mA Loop Power Voltage measurement Single broadcast of the most recent upper display value and units Single broadcast of most recent upper display value without header or units Table 3.
  • Page 26 Calibrators Remote Control Interface (725 and 726) Table 4. Remote Commands for Sensor Selection (725 with V2.xx and lower) Selection Entry Serial Input Thermocouple Type RTD Type Pt100 (3926) Pt100 (385) Pt100 (3916) Pt200 (385) Pt500 (385) Pt1000 (385) Ni120...

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