Fluke 771 Calibration Manual
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Fluke 771 Calibration Manual

Fluke 771 Calibration Manual

Milliamp process clamp meter
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771
Milliamp Process Clamp Meter
Calibration Manual
November 2007 Rev. 1, 7/19
© 2007-2019 Fluke Corporation. All rights reserved. Product specifications are subject to change without notice.
All product names are trademarks of their respective companies.

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Summary of Contents for Fluke 771

  • Page 1 Milliamp Process Clamp Meter Calibration Manual November 2007 Rev. 1, 7/19 © 2007-2019 Fluke Corporation. All rights reserved. Product specifications are subject to change without notice. All product names are trademarks of their respective companies.
  • Page 2 LIMITED WARRANTY AND LIMITATION OF LIABILITY This Fluke product will be free from defects in material and workmanship for 3 years (one year for cable and clamp) from the date of purchase. This warranty does not cover fuses, disposable batteries or damage from accident, neglect, misuse or abnormal conditions of operation or handling.

  • Page 3: Table Of Contents

    Table of Contents Title Page Introduction ......................1 Contacting Fluke ....................2 Safety Information ....................2 Symbols ......................3 Specifications ..................... 4 Getting Acquainted with the Meter ..............5 Maintenance ....................... 7 Cleaning the Meter ..................7 Battery Replacement ..................7 Performance Tests .....................
  • Page 4 Calibration Manual...

  • Page 5: Introduction

    The instrument should be calibrated after repair, or if it fails a performance test. The 771 Calibration Manual provides the following information: • Precautions and safety information • Specifications • Basic maintenance • Calibration verification procedure • Replaceable parts and accessories For complete operating instructions, refer to the 771 Instruction Sheet.

  • Page 6: Contacting Fluke

    Calibration Manual 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: +31 402-675-200 • Japan: +81-3-6714-3114 • Singapore: +65-6799-5566 •...

  • Page 7: Symbols

    Milliamp Process Clamp Meter Symbols • Comply with local and national safety codes. Use personal protective equipment (approved rubber gloves, face protection, and flame-resistant clothes) to prevent shock and arc blast injury where hazardous live conductors are exposed. • Hold the Product behind the tactile barrier. See Figure 1. •...

  • Page 8: Specifications

    Calibration Manual Specifications Current Ranges ±20.99 mA ±21.0 mA to ±99.9 mA Resolution 0.01 mA 0.1 mA Accuracy 20.99 mA range 0.2 % reading ±5 digits 99.9 mA range 1 % reading ±5 digits Maximum Reading ±99.9 mA Influence of Earth’s Field <0.20 mA Battery 2 AA 1.5 V Alkaline, IEC LR6...

  • Page 9: Getting Acquainted With The Meter

    Removes interference and zeros the display Measurement spotlight LED button  Measurement spotlight LED   Detachable clamp Turn on and turn off the backlight   Tactile Barrier docked and un-docked  Figure 1. The 771 Milliamp Process Clamp Meter...
  • Page 10 Calibration Manual h Static Awareness h Semiconductors and integrated circuits can be damaged by electrostatic discharge during handling. This notice explains how to minimize damage to these components. 1. Understand the problem. 2. Learn the guidelines for proper handling. 3. Use the proper procedures, packaging, and bench techniques. Follow these practices to minimize damage to static sensitive parts.

  • Page 11: Maintenance

    Milliamp Process Clamp Meter Maintenance Maintenance XWWarning To prevent possible electric shock or personal injury, repairs or servicing not covered in this manual should be performed only by qualified personnel. Cleaning the Meter XWWarning To prevent electrical shock, remove any input signals before cleaning.
  • Page 12 Calibration Manual ege02.emf Figure 2. Changing the Batteries...

  • Page 13: Performance Tests

    The following tests are used to verify the functions of the Meter. If the Meter fails any of the verification tests, repair is necessary. For service, see Contacting Fluke. Required Equipment Required equipment for the performance tests is listed in Table 2. If the recommended models are not available, equipment with equivalent specifications may be used.

  • Page 14: Testing The Display

    Calibration Manual Testing the Display 1. Press and hold  while powering on the Meter. 2. Compare the Meter display to Figure 3. 3. Check all display segments for clarity and contrast. fdp1.emf Figure 3. Display Test Display Hold Test 1.

  • Page 15: Accuracy Tests

    7. Complete steps 2-4 for each calibrator output setting in Table 3. 8. If the Meter fails to meet any of the Display Reading Limits, it requires calibration adjustment, or repair. See Calibration Adjustment or Contacting Fluke. Table 3. Accuracy Tests Unit Under Test...

  • Page 16: Calibration Adjustment

    Calibration Manual Calibration Adjustment Adjustment Subroutines The Meter features closed-case calibration adjustment using a known reference source. The Meter measures the applied reference source, calculates correction factors, and stores the correction factors in nonvolatile memory. There are four adjustment subroutines in the Meter adjustment procedure: •...

  • Page 17: Calibration Error Messages

    Milliamp Process Clamp Meter Calibration Adjustment Calibration Button fdp3.emf Figure 4. Accessing the Calibration Button Calibration Error Messages Table 4 lists the calibration error messages that can be shown on the Meter display. The suggested actions to eliminate messages are also listed. Table 4.

  • Page 18: Temperature Adjustment Procedure

    Calibration Manual Temperature Adjustment Procedure The percentage display should show t23, if not: 1. Press  for >1 second until t23 appears. 2. Wait at least 60 seconds for the internal temperature to balance. 3. Press  to adjust the temperature. Low Range Adjustment Procedure 1.

  • Page 19: Phase Adjustment Procedure

    Milliamp Process Clamp Meter Calibration Adjustment Phase Adjustment Procedure 1. Clamp the Meter’s current clamp around an insulated 18-gauge, copper wire, with 6-inch diameter. Current flow should be in the direction of the arrow on the current clamp. 2. Press  >1 second until the percentage display indicates the Meter’s currently saved 3-digit phase value.

  • Page 20: User Replaceable Parts

    (does not include fastener, order separately) Access door fastener 948609  LED housing 2720319  Soft case, black/yellow 2726174 771 Instruction Sheet 2567301 [1] If the Jaw Assembly has been replaced, complete the Calibration Adjustment Procedure and Phase Adjustment Procedure.
  • Page 21 Milliamp Process Clamp Meter User Replaceable Parts fdp4.emf Figure 6. Replaceable Parts...
  • Page 22 Calibration Manual...

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