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Fluke 279 FC Calibration Manual

True-rms thermal multimeter
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279 FC
True-rms Thermal Multimeter
Calibration Manual
July 2016
©2016 Fluke Corporation. All rights reserved. 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 279 FC

  • Page 1 279 FC True-rms Thermal Multimeter Calibration Manual July 2016 ©2016 Fluke Corporation. All rights reserved. Specifications are subject to change without notice. All product names are trademarks of their respective companies.
  • Page 2 LIMITED WARRANTY AND LIMITATION OF LIABILITY Each Fluke product is warranted to be free from defects in material and workmanship under normal use and service. The warranty period is three years and begins on the date of shipment. Parts, product repairs, and services are warranted for 90 days.
  • Page 3: Table Of Contents

    Contact Fluke ........
  • Page 4 279 FC Calibration Manual...
  • Page 5: Introduction

    Product. This manual contains the verification and calibration adjustment procedures for the 279 FC True-rms Thermal Multimeter (the Multimeter or Product). See the 279 FC Users Manual for information about how to use the Product.
  • Page 6: Safety Information

    279 FC Calibration Manual 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. XW Warning To prevent possible electrical shock, fire, or personal injury: •...
  • Page 7: Symbols

     disposed of by a qualified recycler or hazardous materials handler per local regulations. Contact your authorized Fluke Service Center for recycling information. This product complies with the WEEE Directive marking requirements. The affixed label indicates that you must not discard this electrical/electronic product in domestic household waste. 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"...
  • Page 8: Specifications

    279 FC Calibration Manual Specifications Maximum Voltage between any Terminal and Earth Ground........1000 V Temperature Operating ............-10 °C to +50 °C Storage (without battery) ........-20 °C to +60 °C Display (LCD) Size ..............8.9 cm (3.5 in.) diagonal Update rate ............4/sec Volts, amps, ohms..........6000 counts...
  • Page 9: Detailed Specifications

    True-rms Thermal Multimeter Detailed Specifications Detailed Specifications For all specifications: Accuracy is specified for 1 year after calibration, at operating temperatures of 18 °C to 28 °C, with relative humidity at 0 % to 90 %. Accuracy specifications take the form of ±([% of Reading] + [Number of least significant digits]).
  • Page 10: Frequency Measurement

    Image Presentation Palette ..............Ironbow Level and Span ...........Auto Image Capture and Data Storage Image Capture ............Image available for review before a save Storage Medium ..........Internal memory, stores up to 100 images ® Image Transfer ............Fluke Connect™ / SmartView File Format ............is2...
  • Page 11: Required Equipment

    If not, repair is necessary. See Contact Fluke on page 1. Backlight Test To verify that the backlight operates correctly: Turn on the Multimeter. Push . The backlight becomes brighter. If not, repair is necessary. See Contact Fluke on page 1.
  • Page 12: Keypad Test

    To verify that the keypad operates correctly: Turn on the Multimeter. Push each button separately. Each time you push a button, the Multimeter beeps. If not, repair is necessary. See Contact Fluke on page 1. Function Performance Tests Before you do the function performance tests: Make sure that you have the necessary equipment.
  • Page 13: Current Tests

    To avoid ice buildup, the 4180 has a cover with a purge inlet. Fluke recommends that the target cover be used at any set-point below the dew point. Depending on the ambient humidity of the environment where the target is used, the dew point can be as high as the ambient temperature of that environment.
  • Page 14: Ir Temperature (Ir Camera) Below Dew Point

    Use a dry gas for the purge. The gas should have a dew point below -15 °C. Fluke recommends nitrogen or dried air. If the gas contains any water vapor or ice, moisture will form on the target. Use a relatively low flow rate of 2.4 to 4.8 liters/min (5 CFH to 10 CFH) for the purge.
  • Page 15 True-rms Thermal Multimeter Performance Tests Fluke 4180/4181 Fluke 279 FC 20 in 51 cm iFlex Figure 3. IR Camera Performance Test Configuration...
  • Page 16 279 FC Calibration Manual Table 3. Performance Tests Test Input Lower Limit Upper Limit Units (Control Knob Position) 5 V, 45 Hz 4.947 5.053 5 V, 500 Hz 4.247 5.753 3 V, 45 Hz 2.967 3.033 50 V, 45 Hz 49.47...
  • Page 17: Before Calibration Adjustment

    True-rms Thermal Multimeter Before Calibration Adjustment Before Calibration Adjustment Before you adjust the calibration, go to the Multimeter Calibration menu: Push  to open the Setup Menu. Use  to highlight Calibration. Push (Select) to open the submenu. To enter the password: Push .
  • Page 18: Restore The Default Password

    279 FC Calibration Manual Restore the Default Password If the calibration password is lost, use this procedure to restore the default password (1234) manually: XW Warning To prevent electric shock or personal injury, remove all input signals before you open the Product.
  • Page 19: Calibration Adjustment

    True-rms Thermal Multimeter Calibration Adjustment Calibration Adjustment The Multimeter features closed-case calibration adjustment and uses known reference sources. The multimeter measures the applied reference source, calculates correction factors, and stores the correction factors in nonvolatile memory. Note No adjustment steps are required for temperature measurements. If the Multimeter fails any of the performance tests, do the Calibration Adjustment procedure.
  • Page 20: Maintenance

    279 FC Calibration Manual Maintenance XWWarning To prevent a possible electrical shock, fire, or personal injury: • Disconnect the battery charger and move the Product or battery to a cool, non- flammable location if the rechargeable battery becomes hot (>50 °C) during the charge period.
  • Page 21 True-rms Thermal Multimeter Maintenance After battery is fully recharged: Place the battery pack into the battery compartment. Install the battery door/tilt stand. Turn the battery-door latch until the locked symbol () aligns with the arrow. The display shows an icon for the battery status: - 100 % charge - 50 % charge - 0 % charge...
  • Page 22: User-Replaceable Parts

    279 FC Calibration Manual User-Replaceable Parts User-replaceable parts are shown in Table 5. For more information about parts or to order, see Contact Fluke on page 1. Table 5. Replacement Parts Fluke Part or Item Description Model Number  Case Bottom 4693448 ...