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Fluke 27 II Calibration Information Manual

Digital multimeters
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Introduction
To avoid electric shock or injury, do not perform the
performance tests or calibration adjustment procedures unless
qualified to do so.
The information provided in this document is for the use of
qualified personnel only.
The 27 II/28 II Calibration Information provides adjustment and performance test
procedures for the Fluke Model 27 II and 28 II Digital Multimeters (hereafter known as
the Meter).
This document includes the following information:
Safety Information and International Electrical Symbols (page 2)
Specifications (page 5)
Testing the Fuse (page 9)
Cleaning (page 9)
Performance Tests (page 11)
Calibration Adjustment (page 19)
Replacement Parts (page 24)
Complete Warranty (page 27)
See the 27 II/28 II Users Manual for complete operating instructions.

Contact Information

To contact Fluke, call one of the following telephone numbers:
USA: 1-888-99-FLUKE (1-888-993-5853)
Canada: 1-800-36-FLUKE (1-800-363-5853)
Europe: +31 402-675-200
Japan: +81-3-3434-0181
Singapore: +65-738-5655
Anywhere in the world: +1-425-446-5500
Or, visit Fluke's Web site at www.fluke.com.
To register your product, visit
April 2010
© 2010 Fluke Corporation. All rights reserved. Specifications are subject to change without notice.
All product names are trademarks of their respective companies.
XWWarning
register.fluke.com
27 II/28 II
Digital Multimeters

Calibration Information

1

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  Summary of Contents for Fluke 27 II

  • Page 1: Calibration Information

    The information provided in this document is for the use of qualified personnel only. The 27 II/28 II Calibration Information provides adjustment and performance test procedures for the Fluke Model 27 II and 28 II Digital Multimeters (hereafter known as the Meter). This document includes the following information: •...
  • Page 2: Safety Information

    27 II/28 II Calibration Information Safety Information "Warning" and "Caution" Statements A Warning identifies hazardous conditions and actions that could cause bodily harm or death. A Caution identifies conditions and actions that could damage the Meter, the equipment under test, or cause permanent loss of data.
  • Page 3 Digital Multimeters Safety Information • When making electrical connections, connect the common test lead before connecting the live test lead; when disconnecting, disconnect the live test lead before disconnecting the common test lead. • Do not use the Meter if it operates abnormally. Protection may be impaired.
  • Page 4: Electrical Symbols

    Do not dispose of this product as unsorted municipal waste. Go  Diode to Fluke’s website for recycling information. Inspected and licensed by TÜV ® Conforms to relevant Australian standards. Product Services.
  • Page 5: General Specifications

    28 II................0.05 X (specified accuracy) / °C (< 18 °C or > 28 °C) 27 II................0.1 X (specified accuracy) / °C (< 18 °C or > 28 °C) Electromagnetic Compatibility (EN 61326-1:1997) ..In an RF field of 3 V/M, accuracy = specified accuracy +20 counts, except 600 μA dc range total accuracy = specified...
  • Page 6: Dc Voltage, Conductance, And Resistance

    27 II/28 II Calibration Information 28 II AC Voltage AC conversions are ac-coupled and valid from 3 % to 100 % of range. Accuracy Range Resolution 45 – 65 Hz 15 – 200 Hz 200 – 440 Hz 440 Hz – 1 kHz 1 –...
  • Page 7 10.00 A AC conversion for the 27 II is ac coupled and calibrated to the rms value of a sine wave input. Below 300 counts, add 1 count and the temperature coefficient is 0.15 x (specified accuracy) / °C (>40 °C).
  • Page 8: Frequency Counter Sensitivity And Trigger Levels

    27 II/28 II Calibration Information Frequency Counter Sensitivity and Trigger Levels Minimum Sensitivity (RMS Sine Wave) Approximate Trigger Level Input Range (DC Voltage Function) 5 Hz – 20 kHz 0.5 Hz – 200 kHz 600 mV dc 70 mV (to 400 Hz)
  • Page 9: Basic Maintenance

    Digital Multimeters Basic Maintenance Basic Maintenance XWWarning To avoid possible electric shock or personal injury, repairs or servicing covered in this manual should be performed only by qualified personnel. General Maintenance Periodically wipe the case with a damp cloth and mild detergent. Do not use abrasives or solvents.
  • Page 10: How To Replace The Batteries

    27 II/28 II Calibration Information How to Replace the Batteries XWWarning To avoid false readings, which could lead to possible electric shock or personal injury, replace the battery as soon as the battery indicator () appears. If the display shows “batt” the Meter will not function until the battery is replaced.
  • Page 11: Performance Tests

    Digital Multimeters gaq10.eps Figure 2. Battery and Fuse Replacement Performance Tests XWWarning To avoid electric shock, do not perform the performance test procedures unless the Meter is fully assembled. The following performance tests verify the complete operation of the Meter and check the accuracy of each Meter function against its specifications.
  • Page 12: Required Equipment

    27 II/28 II Calibration Information Required Equipment Table 2 lists the equipment required to conduct a performance test on the Meter. Table 2. Required Equipment Recommended Equipment Measurement Function Accuracy 5520A Multi-product Calibrator DC Volts 0 to 1000 V ±0.012 % (or equivalent) 350 μA to 2 A...
  • Page 13: Testing Meter Accuracy

    To test the accuracy of the Meter, perform the steps in Table 3. Table 3. Accuracy Tests Display Reading Test Step Range 5520A Output Function 27 II 28 II  600 mV 60 mV, 60 Hz 59.4 to 60.6 59.2 to 60.8 AC Volts...
  • Page 14 27 II/28 II Calibration Information Table 3. Accuracy Tests (cont.) Display Reading Test Step Range 5520A Output Function 27 II 28 II 600 mV 50 mV dc 49.8 to 50.2 49.8 to 50.2  600 mV 330 mV dc 329.6 to 330.4 329.6 to 330.4...
  • Page 15: Calibration Adjustments

    Digital Multimeters Calibration Adjustments Table 3. Accuracy Tests (cont.) Display Reading Test Step Range 5520A Output Function 27 II 28 II 0 °C mVdc -1.0 to 1.0 Temperature 100 °C 98.0 to 102.0 – 28 II Backlight Press backlight Backlight comes...
  • Page 16: Changing The Password

    27 II/28 II Calibration Information Changing the Password To change the password in the Meter: 1. Turn the Meter Rotary Switch from OFF to VAC mode while holding down the MINMAX pushbutton at the same time. The Meter will display Y CAL.
  • Page 17 Digital Multimeters Calibration Adjustments If the revision number is 010: 4. Remove the PCB from the top case. 5. Apply power to the PCB by clipping on a dc voltage between 3.5 V and 5 V at the test points marked “+” and “-” at the edge of the board. See Figure 3. 2X-2- 3001 REV 010 3.5 - 5 V gaq101.eps...
  • Page 18 27 II/28 II Calibration Information If the revision number is 011 or higher: 4. Apply power to the PCB by clipping on a dc voltage between 3.5 V and 5 V at the test points marked “+” and “-” at the edge of the board. See Figure 4.
  • Page 19: Other Pushbutton Functions

    Digital Multimeters Calibration Adjustments Other Pushbutton Functions Table 4 list the button on the Meter and describes what the button does when pressed after the password has been entered and  pressed. Table 4. Pushbutton Functions During Cal Mode Button Cal Mode Description Press and hold to test the present function.
  • Page 20 27 II/28 II Calibration Information Table 5. Fluke 27 II Calibration Adjustment Steps Function Adjustment Step Input Value (Switch Position) C-01 0 mV, 0 Hz  C-02 6.0 mV, 60 Hz (AC Volts) C-03 60.0 mV, 60 Hz C-04 600.0 mV, 60 Hz C-05 600.0 mV, 20 kHz...
  • Page 21 Digital Multimeters Calibration Adjustments Table 5. Fluke 27 II Calibration Adjustment Steps (cont.) Function Adjustment Step Input Value (Switch Position) 0.0 μA ac, 0 Hz C-36  30.0 μA, 60 Hz C-37 (Microamps) 60.0 μA. 60 Hz C-38 600.0 μA, 60 Hz C-39 6000.0 μA, 60 Hz...
  • Page 22: Disassembling The Meter

    27 II/28 II Calibration Information Table 6. Fluke 28 II Calibration Adjustment Steps (cont.) Function Adjustment Step Input Value (Switch Position) 600.0 μA, 60 Hz C-28  6000 μA, 60 Hz C-29 (Microamps) 600.0 μA dc C-30 6000 μA dc...
  • Page 23: Reassembling The Meter

    7. Case screw o-ring: Torque case screws to 12 in-lbs torque. Verify that the o-rings are not sticking out of the sides of the screw head. Note If you want to ensure your Meter meets the IP67 rating, return the Meter to a qualified Fluke Service center.
  • Page 24: Replacement Parts

    27 II/28 II Calibration Information Replacement Parts Table 7 lists the Meter’s replaceable parts identified in Figure 5. H1 (6) MP3 (2) BT1 (3) H2 (6) H3 (6) MP8 (2) H4 (7) H4 (7) H5 (4) MP10 MP14 MP11 MP12...
  • Page 25 FLUKE-2X-2-2004,CASE, BOTTOM WITHOUT BATTERY CONTACTS 3320869 FLUKE 2X-II-8006,GASKET, TOP CASE, FLUKE-27-II AVG AND FLUKE-28-II TRMS METERS 3439079 SHENGUANG-8012,BATTERY CONTACT SHENGUANG 3324731 FLUKE-2X-2-8002,BOTTOM SHIELD, FLUKE 27-2 AVG / FLUKE 28- 2 TRMS MULTIMETER 3371942 CONNECTOR,ELASTOMERIC,.375 HIGH,.10 THICK,1.59 MP10 LONG,BULK 3440661 MP11...
  • Page 26 ,TEST LEADS 855742 Not Shown 80BK-A-8001, TYPE K THERMOCOUPLE ASSEMBLY (for 28-2) 2747900 Not Shown FLUKE 87-5-8009,TILTSTAND 2074040 Not Shown 27 II / 28 II Getting Started Manual 3368142 Not Shown 27 II / 28 II Users Manual CD 3368139...
  • Page 27: Lifetime Limited Warranty

    For ten years from the date of purchase, this warranty also covers the LCD. Thereafter, for the lifetime of the DMM, Fluke will replace the LCD for a fee based on then current component acquisition costs.
  • Page 28 27 II/28 II Calibration Information...

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28 ii