® 771 Milliamp Process Clamp Meter Calibration Manual November 2007 © 2007 Fluke Corporation, All rights reserved. Printed in USA. Product specifications are subject to change without notice. All product names are trademarks of their respective companies.
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. Resellers are not authorized to extend any other warranty on Fluke’s behalf.
Table of Contents Title Introduction........................................................................................................ Contacting Fluke................................................................................................ Safety Information ............................................................................................. Symbols ............................................................................................................. Specifications............
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List of Tables Table 1. 2. 3. 4. 5. Title Symbols.................................................................................................................. Required Equipment............................................................................................... Accuracy Tests ....................................................................................................... Error Messages...................................................................................................
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List of Figures Figure 1. 2. 3. 4. 5. 6. Title The 771 Milliamp Process Clamp Meter ............................................................... Changing the Batteries ........................................................................................... Display Test ........................................................................................................... Accessing the Calibration Button........................................................................... Phase Adjustment..
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771 Milliamp Process Clamp Meter Introduction XW Warning To avoid electric shock or personal injury, do not perform the calibration verification tests or calibration procedures described in this manual unless you are qualified to do so. The information provided in this manual is for the use of qualified personnel only. This manual provides the complete verification and adjustment procedure for the 771 Milliamp Process Clamp Meter (referred to in this manual as the Meter).
771 Calibration Manual Contacting Fluke To contact Fluke, call: 1-888-993-5853 in USA 1-800-363-5853 in Canada +31-402-675-200 in Europe +81-3-3434-0181 in Japan +65-738-5655 in Singapore +1-425-446-5500 from anywhere in the world Or, visit Fluke’s Web site at www.fluke.com To register your product, visit http://register.fluke.com Safety Information In this manual, a Warning identifies conditions and actions that pose hazard(s) to the user.
Milliamp Process Clamp Meter Symbols • When measuring, keep fingers behind the Tactile Barrier. See Figure 1. • Not for use with non-insulated conductors. WCaution To avoid damage to the Meter, do not open the Meter for cleaning. Do not use solvents to clean it, and do not immerse it in liquid. Symbols Table 1 explains the symbols that are used on the Meter or in this manual. Table 1. Symbols - Do not apply around, or remove from HAZARDOUS LIVE conductors W Risk of danger. Important information.
771 Calibration Manual Specifications Current Ranges ±20.99 mA ±21.0 mA - ±99.9 mA Resolution 0.01 mA 0.1 mA Accuracy 20.99 mA range 99.9 mA range 0.2 % reading ±5 digits 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 Working hours 45 hours Size (H X W X L) 59 mm x 38 mm x 212 mm (2.32 in x 1.49 in x 8.34 in) (with clamp nested) Weight 260 g (9.
Milliamp Process Clamp Meter Getting Acquainted with the Meter Getting Acquainted with the Meter Figure 1 shows the Meter functions and features. 9 6 5 4 3 2 7 1 8 ege01a.eps Number Description A Turns the Meter on and off. When the Meter is in sleep mode, press this button to wake it up.
771 Calibration Manual Maintenance XWWarning To avoid 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 avoid electrical shock, remove any input signals before cleaning. W Caution To avoid damaging the Meter, do not use aromatic hydrocarbons or chlorinated solvents for cleaning. These solutions will react with the plastics used in the Meter.
Milliamp Process Clamp Meter Maintenance ege02.eps Figure 2.
771 Calibration Manual Performance Tests XWWarning To avoid electrical shock, personal injury, or fire: • Do not perform the verification tests or calibration adjustment described in this manual unless you are qualified to do so. • Repairs or servicing should be performed only by qualified personnel. 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.
Milliamp Process Clamp Meter Performance Tests Testing the Display 1. Press and hold Awhile powering on the Meter. 2. Compare the Meter display to Figure 3. 3. Check all display segments for clarity and contrast. fdp1.eps Figure 3. Display Test Display Hold Test 1. Power on the Meter and allow time for the normal operating display to appear. 2. Press H and observe that I appears on the display. I flashes at 3 to 4 second intervals. Backlight Test 1.
771 Calibration Manual Perform the tests as follows: 1. Connect a single loop of 14 gauge insulated copper wire to the calibrator AUX output terminals. 2. Clamp the Meter jaw around the wire with the jaw arrow pointing toward the calibrator HI terminal. 3. Output 0 mA dc from the calibrator. 4. Press A on the Meter. 5. Set the calibrator output for the value in Step 1 of Table 3. 6. Compare the Meter displayed reading with the display reading limits in Table 3. 7.
Milliamp Process Clamp Meter Calibration Adjustment 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.
771 Calibration Manual Calibration Button fdp3.eps 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. Error Messages Error Message Cause of Error CAL ERR1 The difference between the input level and the zero point is less than the minimal threshold when performing low range and high range adjustments.
Milliamp Process Clamp Meter Calibration Adjustment Temperature Adjustment Procedure 1. Press C for >1 second until t23 appears on the percentage display. 2. Wait at least 60 seconds for the internal temperature to balance. 3. Press H to adjust the temperature. Low Range 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.
771 Calibration Manual 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 C >1 second until the percentage display indicates the Meter’s currently saved phase value. 3. Output 0 µA dc from the calibrator. 4. Press A on the Meter to zero the reading. 5.
Milliamp Process Clamp Meter User Replaceable Parts User Replaceable Parts Table 5 and Figure 6 list all user replaceable parts. Table 5. Replaceable Parts Item ID Description P/N Qty A Decal 2723063 1 B Case top assembly (does not include decal, order separately) 2720362 1 C Keypad 2723056 1 D Jaw assembly (Includes cable) 2722971 1 E Screw,m2.2x0.
771 Calibration Manual 1 2 3 4 5 6 15 7 10 8 9 12 11 13 14 fdp4.eps Figure 6.
