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Fluke 28 II Ex Calibration Information Manual

Digital multimeter
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Introduction
To prevent possible electrical shock, fire, or personal injury:
Read all safety information before you use the Product.
Do not do the performance tests or calibration adjustment
procedures unless qualified to do so.
Read the entire Users Manual and the Safety Instructions
before you use the Product.
Carefully read all instructions.
The 28 II Ex Calibration Information contains adjustment and performance test
procedures for the Fluke Model 28 II Ex Digital Multimeter (the Product or Meter).
This document includes:
Safety Information (page 2)
International Electrical Symbols (page 4)
Specifications (page 5)
General Maintenance (page 9)
Fuse Test (page 9)
Performance Tests (page 12)
Calibration Adjustment Procedure (page 16)
Limited Warranty (page 20)
See the 28 II Ex Users Manual for instructions on Product operation.

How to Contact Fluke

To contact Fluke, call one of the following telephone numbers:
Technical Support USA: 1-800-99-FLUKE (1-800-993-5853)
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: +81-3-3434-0181
China: 86-400-921-0835
Singapore: +65-6799-5566
Anywhere in the world: +1-425-446-5500
Or, visit Fluke's website at www.fluke.com.
To register your product, visit http://register.fluke.com.
To view, print, or download the latest manual supplement, visit
http://us.fluke.com/usen/support/manuals.
May 2012 Rev. 1, 10/17
© 2012-2017 Fluke Corporation. All rights reserved. Specifications are subject to change without notice.
All product names are trademarks of their respective companies.
XWWarning
28 II Ex

Digital Multimeter

Calibration Information

1

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  Summary of Contents for Fluke 28 II Ex

  • Page 1: Digital Multimeter

    Product. • Carefully read all instructions. The 28 II Ex Calibration Information contains adjustment and performance test procedures for the Fluke Model 28 II Ex Digital Multimeter (the Product or Meter). This document includes: • Safety Information (page 2) •...
  • Page 2: Safety Information

    28 II Ex Calibration Information Safety Information A Warning identifies conditions and procedures that are dangerous to the user. A Caution identifies conditions and procedures that can cause damage to the Product or the equipment under test. XWWarning To prevent possible electrical shock, fire, or personal injury: •...
  • Page 3 Digital Multimeter Safety Information • Do not use and disable the Product if it is damaged. • Do not use the Product if it operates incorrectly. • Do not use the Product in damp or wet environments. • Keep fingers behind the finger guards on the probes. •...
  • Page 4: Electrical Symbols

    28 II Ex Calibration Information Electrical Symbols Table 1 is a list of electrical symbols that appear in this document and on the Meter. Table 1. Symbols WARNING - RISK OF DANGER. Consult user documentation. WARNING. HAZARDOUS VOLTAGE. Risk of electric shock.
  • Page 5: General Specifications

    Digital Multimeter General Specifications General Specifications Maximum voltage between any terminal and earth ground ........... 1000 V rms W Fuse for mA inputs ..........0.44 A, 1000 V IR 10 kA W Fuse for A inputs ............. 11 A, 1000 V IR 17 kA Display ................
  • Page 6: Detailed Specifications

    28 II Ex Calibration Information Detailed Specifications For all detailed specifications: Accuracy is specified for 2 years after calibration, at operating temperatures of 18 °C to 28 °C, with relative humidity at 0 % to 80 %. Accuracy specifications take the form of ±([% of Reading] + [Number of least-significant digits]). In the 4 ½-digit mode, multiply the number of least-significant digits (counts) by 10.
  • Page 7 Digital Multimeter Detailed Specifications AC Current Accuracy Function Range Resolution Burden Voltage (45 Hz – 2 kHz) 600.0 μA 0.1 μA 100 μV/μA μA ac 6000 μA 1 μA 100 μV/μA 60.00 mA 0.01 mA 1.8 mV/mA ±(1.0 % + 2) mA ac 0.1 mA 1.8 mV/mA...
  • Page 8: Frequency Counter Sensitivity And Trigger Levels

    28 II Ex 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

    Dry each terminal with canned air to push the water and detergent out of the terminals. It is recommended that the Product be calibrated by Fluke in 2-year intervals. XWWarning To prevent possible electrical shock or personal injury, use only specified replacement fuses with the amperage, voltage, and speed ratings shown in Table 2.
  • Page 10: Battery Replacement

    28 II Ex Calibration Information Good 0.44 A fuse: 0.995 kΩ to 1.005 kΩ Replace fuse: OL Touch top half of input contacts Good 11 A fuse: 0.0 Ω to 0.5 Ω Replace fuse: OL gaq105.eps Figure 1. Current Fuse Test Battery Replacement Replace the batteries with three AAA batteries (NEDA 24A IEC LR03).
  • Page 11 5. Align the battery compartment barrier with battery compartment while you replace the battery door. 6. Attach the door with the six Torx-head screws. Note Fluke recommends that you remove the batteries from the Product for long periods of storage. gaq10.eps Figure 2. Battery and Fuse Replacement...
  • Page 12: Performance Tests

    Description Qty. Fluke Part or Model Number W Fuse, 11 A, 1000 V, FAST 803293 28 II Ex Fuse Assembly 4016494 W To ensure safety, use exact replacement only. Performance Tests XWWarning To prevent possible electrical shock, do not do the performance test procedures unless the Product is fully assembled.
  • Page 13: Required Equipment

    Measurement Function Accuracy Calibrator DC Volts 0 V to 1000 V ±0.012 % (Fluke 5520A or equivalent) DC Current 350 μA to 2 A ±0.05 % AC Volts 0 V to 1000 V ±0.15 % @ 60 Hz to 20 kHz ±3 % AC Current 350 μA to 2 A ±0.39 %...
  • Page 14 28 II Ex Calibration Information Table 4. Accuracy Tests (cont.) UUT Measurement Test Step Range 5520A Output Function Low Limit High Limit K 600 mV 150 mV, 99.95 kHz 99.93 kHz 99.97 kHz AC Volts 600 mV 150 mV, 199.50 kHz 199.48 kHz...
  • Page 15: Calibration Adjustments

    Digital Multimeter Calibration Adjustments Table 4. Accuracy Tests (cont.) UUT Measurement Test Step Range 5520A Output Function Low Limit High Limit  600 μA 330 μA 328.9 μA 331.1 μA DC Microamps 6000 μA 3300 μA 3291 μA 3309 μA 10 nF Open input 0.70 nF...
  • Page 16: Calibration Adjustment Procedure

    28 II Ex Calibration Information Table 5. Button Functions for Calibration Adjustment Password Button CAL Function Numeric Value Push and hold to show the measured value in the display. The measurement  (Yellow) is not calibrated, so it can be inaccurate.
  • Page 17 Digital Multimeter Calibration Adjustments 5.  in the display shows the CAL mode is set and the Meter is at the first calibration adjustment step. WCaution To prevent damage to the Meter, make sure the calibrator is in standby before you change its parameters, or change the function on the Meter.
  • Page 18 28 II Ex Calibration Information Table 6. Calibration Adjustment Steps Function Adjustment Step Input Value (Switch Position) C-01 600.0 mV, 60 Hz K C-02 600.0 mV, 20 kHz (AC Volts) C-03 6.000 V, 60 Hz C-04 6.000 V, 20 kHz C-05 60.00 V, 60 Hz...
  • Page 19 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 20 28 II Ex Calibration Information...