Fluke 287C Calibration Manual

True-rms digital multimeters

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287/289
True-rms Digital Multimeters
Calibration Manual
February 2008, Rev. 2, 1/2019
© 2008-2019 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 287C

  • Page 1 287/289 True-rms Digital Multimeters Calibration Manual February 2008, Rev. 2, 1/2019 © 2008-2019 Fluke Corporation. All rights reserved. Specifications are subject to change without notice. All product names are trademarks of their respective companies.
  • Page 2: Lifetime Limited Warranty

    Lifetime Limited Warranty Each Fluke 20, 70, 80, 170, 180 and 280 Series DMM will be free from defects in material and workmanship for its lifetime. As used herein, “lifetime” is defined as seven years after Fluke discontinues manufacturing the product, but the warranty period shall be at least ten years from the date of purchase.
  • Page 3: Table Of Contents

    Table of Contents Title Page Lifetime Limited Warranty ................2 Introduction ......................1 How to Contact Fluke ..................1 Safety Information ..................... 2 Symbols ......................2 Hazardous Voltage ..................... 4 General Specifications ..................5 Detailed Specifications ..................5 AC Voltage Specifications ................6 AC Current Specifications ................
  • Page 4 287/289 Calibration Manual IR Port Verification ..................16 Temperature Accuracy Test................16 Accuracy Tests for Volts, Current, Ω, , and  Test Functions ....17 Calibration Adjustment ..................20 Operation ....................... 21 Entering the Password ................... 21 Changing the Password ................. 21 Restoring Factory Default Password .............
  • Page 5: Introduction

    Follow the standard practices for handling static sensitive devices. The information in this manual deals with the Fluke Models 287 & 289 True-rms Digital Multimeters, (hereafter referred to as “the Meter”). Information provided includes: •...
  • Page 6: Safety Information

    Directive Annex I, this product is classed as category 9 "Monitoring and Control Instrumentation" product. Do not dispose of this product as unsorted municipal waste. Go to Fluke’s website for recycling information.  Conforms to relevant South Korean EMC Standards.
  • Page 7 True-rms Digital Multimeters Symbols XWWarning To avoid possible electric shock, fire, or personal injury, follow these guidelines: • Do not alter the Product and use only as specified, or the protection supplied by the Product can be compromised. • Do not use the Meter if it is damaged. Before you use the Meter, inspect the case.
  • Page 8: Hazardous Voltage

    287/289 Calibration Manual • When servicing the Meter, use only specified replacement parts. • When using probes, keep fingers behind the finger guards on the probes. • Do not use the Low Pass Filter option to verify the presence of hazardous voltages. Voltages greater than what is indicated may be present.
  • Page 9: General Specifications

    True-rms Digital Multimeters General Specifications General Specifications Maximum voltage between any Terminal and Earth Ground: 1000 V W Fuse Protection for mA or μA inputs ..... 0.44 A, 1000 V, IR 10 kA W Fuse Protection for A input ......11 A, 1000 V, IR 17 kA Battery Type ............
  • Page 10: Ac Voltage Specifications

    287/289 Calibration Manual AC Floor: When the input leads are shorted together in the ac functions, the Meter may display a residual reading up to 200 counts. A 200 count residual reading will cause only a 20 count change for readings at 2 % of range. Using REL to offset this reading may produce a much larger constant error in later measurements.
  • Page 11: Dc Voltage Specification

    True-rms Digital Multimeters Detailed Specifications DC Voltage Specification Accuracy AC over DC, DC over AC, AC + DC Function Range Resolution 45 Hz to 20 to 35 kHz 20 to 45 Hz 1 to 20 kHz 1 kHz DC mV 50 mV 0.001 mV 0.05 % + 20...
  • Page 12: Temperature Specifications

    287/289 Calibration Manual Temperature Specifications [1,2] Temperature Resolution Accuracy -200 °C to +1350 °C 0.1 °C 1 % + 10 -328 °F to +2462 °F 0.1 °F 1 % + 18 [1] Does not include error of the thermocouple probe. [2] Accuracy specification assumes ambient temperature stable to ±1 °C.
  • Page 13: Frequency Counter Sensitivity

    True-rms Digital Multimeters Detailed Specifications Frequency Counter Sensitivity Approximate Voltage Sensitivity Approximate DC (rms sine wave) Input Range AC Bandwidth DC Bandwidth Trigger Levels 15 Hz to 100 kHz 50 mV 5 mV 1 MHz 5 mV & 20 mV 600 kHz 500 mV 25 mV...
  • Page 14: Burden Voltage (A, Ma, Μa)

    5 nF Accuracy: ±0.55 % Temperature Range: 0 to 1000 °C Accuracy: 0.2 % Thermocouple Adapter K-type Fluke 80AK Accessory K-type Thermocouple wire K-type, mini-plug on both ends Serial Cable, Infrared Cable, Adapter, Fluke-Custom IRDA Optical to USB,2M Fluke P/N 2166275...
  • Page 15: Basic Maintenance

    True-rms Digital Multimeters Basic Maintenance Basic Maintenance XW Warning To avoid electrical shock or personal injury, remove the test leads and any input signals before opening the case or replacing the battery or fuses. To prevent damage or injury, install ONLY batteries or fuses specified for this product. Opening the Meter Case W Caution To avoid unintended circuit shorting, always place the...
  • Page 16: Reassembling The Meter Case

    287/289 Calibration Manual Reassembling the Meter Case To reassemble the Meter case, do the following: 1. Verify the rotary switch knob is in the  position (arrow on the rotary switch detent points straight up to the LCD). 2. Install the display bezel, LCD, and top shield into the top case. 3.
  • Page 17: Replacing Fuses

    3. Remove either fuse by gently prying one end loose, then lifting the fuse out of the fuse contacts. 4. Install only Fluke specified replacement fuses with the amperage, voltage, and interrupt ratings shown in the replacement parts list (see Table 9).
  • Page 18: Cleaning

    To perform the tests you will need a Fluke 5520A Calibrator or equipment meeting the minimum specification given in Table 2. Prior to beginning the accuracy tests, allow for the Meter to stabilize to room temperature.
  • Page 19: Factory Default

    True-rms Digital Multimeters Performance Tests Factory Default Prior to completing the Performance tests Reset the Meter to the factory defaults as follows: 1. Power the Meter on in any function. 2. Press F4 (Setup) and select Reset using arrow keys. 3.
  • Page 20: Ir Port Verification

    Append line feeds to incoming line ends Wrap lines that exceed terminal width 9. Enter the identification command <ID> followed by carriage return (Enter) 10. The Meter should return the response: FLUKE 289, VX.XX, X, indicating the model, software version, and serial number. Note...
  • Page 21: Accuracy Tests For Volts, Current, Ω, , And  Test Functions

    True-rms Digital Multimeters Performance Tests 1. Turn the Meter on and position the rotary switch to  and select the temperature function. Select the degrees C function key. 2. On the Meter, select Offset. Adjust the offset to 000.0 using keypad edit buttons. 3.
  • Page 22 287/289 Calibration Manual Table 4. 287/289 Performance Test Steps (cont.) Display Reading Frequency Step Function Range Input Level Lower Upper or Model Limit Limit DC mV 50.000 mV 50 mV 49.955 50.045 Discontinue REL Offsets DC mV 500.00 mV 500 mV 499.85 500.15 DC mV...
  • Page 23 True-rms Digital Multimeters Performance Tests Table 4. 287/289 Performance Test Steps (cont.) Display Reading Frequency Step Function Range Input Level Lower Upper or Model Limit Limit VAC, HZ, % 5 V p-p, Sq. 5.0000 V 50 kHz 1.40 28.60 (Duty Cycle) wave @15 % 50.000 V 15 V...
  • Page 24 287/289 Calibration Manual Table 4. 287/289 Performance Test Steps (cont.) Set 5520A for COMP off Connect 5520A Auxiliary Output to Meter’s mA/μA and COM Input Terminals Display Reading Frequency Step Function Range Input Level Lower Upper or Model Limit Limit μA AC 500.00 μA 500 μA...
  • Page 25: Calibration Adjustment

    True-rms Digital Multimeters Calibration Adjustment Calibration Adjustment The Meter features closed-case calibration adjustment using known reference sources. The Meter measures the applied reference source, calculates correction factors and stores the correction factors in nonvolatile memory. The following sections present the features and Meter pushbutton functions that can be used during the Calibration Adjustment Procedure.
  • Page 26: Restoring Factory Default Password

    287/289 Calibration Manual “Entering the Password” section above. When the new password is accepted then the message “Password changed” is displayed. The F1 key [OK] is used to return to the measurement mode. Restoring Factory Default Password Restoring the factory default password [1234] can be done as follows: 1.
  • Page 27: Screenshot Description

    True-rms Digital Multimeters Calibration Adjustment Screenshot Description The following describes the Meter dialog shown in Figure 4 Screenshot. 1. Live Reading measurement shown in the Primary display is using default calibration constants. The measurement is likely to be slightly different from the applied signal, because it is an uncalibrated measurement.
  • Page 28: Power Cycle

    287/289 Calibration Manual seconds). If the measurement is within calibration tolerance the Meter records the new constant(s) and proceeds to the next calibration step, giving a single beep to prompt the user to proceed. Note The frequency value for AC functions will not be validated. If the measurement is not within calibration tolerance then after pressing NEXT an error message will be shown and the calibration step will not proceed.
  • Page 29 True-rms Digital Multimeters Calibration Adjustment Table 7. Calibration Adjustment Steps for Firmware Version 1 Rotary Switch Settling Time Calibrating Time Step Source Value Position (seconds) (seconds) mV DC 0.0 V, 0 Hz mV DC 500.0 mV, 0 Hz mV DC 50.0 mV, 0 Hz mV DC 50.0 V, 0 Hz...
  • Page 30 287/289 Calibration Manual Table 7. Calibration Adjustment Steps for Firmware Version 1.00 (cont.) Rotary Switch Settling Time Calibrating Time Step Source Value Position (seconds) (seconds) Connect the 5520A in a 4-Wire configuration and select COMP 2-Wire mV DC 500.0 mV, 60.0 Hz Connect the 5520A in a 4-Wire configuration and select COMP 2-Wire Ω...
  • Page 31 True-rms Digital Multimeters Calibration Adjustment Table 7. Calibration Adjustment Steps for Firmware Version 1.00 (cont.) Connect the 5520A in a 4-Wire configuration and select COMP 2-Wire To reduce settling time, apply 10 ohms to Meter before setting Rotary Switch to LoΩ 10.000 Ω...
  • Page 32 287/289 Calibration Manual Table 8. Calibration Adjustment Steps for Firmware Version 1.10 (cont.) Rotary Switch Settling Time Calibrating Time Step Source Value Position (seconds) (seconds) 0.0 V, 0 Hz 5.0 V, 0 Hz 50.0 V, 0 Hz 500.0 V, 0 Hz 1000.0 V, 0 Hz 5.0 V, 55 Hz 5.0 V, 20.0 kHz...
  • Page 33: Parts

    FLUKE-28X-2010,HOUSING, RSOB, LOWER 2578290 MP12 FLUKE-28X-2015,SPRING DETENT 2723772 MP16 FLUKE-28X-8002,KEYPAD 2578234 FUSE, .440A,1000V,FAST,.406X1.375,BULK 943121 FUSE,11A,1000V,FAST.406INX1.5IN,BULK 803293 XBT1 FLUKE-28X-8006,BATTERY CONTACT, POSITIVE, BOTTOM CASE 2578353 XBT2-3 FLUKE-28X-8007,BATTERY CONTACT,NEGATIVE,BOTTOM CASE 2578375 LCD MODULE,289,320X240,FSTN,3.5 MONO 2734828 GRAPHIC,TRANSFLCTV,WHITE LED,0.22MM PITCH H15-18 SCREW,M3X0.5,6MM,PAN,PHILLIPS,STEEL,ZINC-CHROMATE 2743764 SCREW,4-14,.510,PAN,PHILLIPS,STEEL,ZINC-CHROMATE,TYPE BT H7-14...
  • Page 34 287/289 Calibration Manual Table 9. Replacement Parts (cont.) BATTERY,PRIMARY,MNO2- H1-6 376756 ZN,1.5V,2.24AH,15A,LR6,ALKALINE,AA,14X50MM,BULK MP30 O-RING,NITRILE,SHORE A 90,AS 568A-905,.414 ID,.072 W 2740185 MP42-44 FLUKE-28X-8013,SHOCK ABSORBER, LCD 2793516 MP49 FLUKE-28X-2007,SHIELD, LOWER 2578265 MP45 FLUKE-28X-8014,SHOCK ABSORBER, BATTERY COMPARTMENT 2793525 MP46 FLUKE-28X-2019,BATTERY DOOR ASSEMBLY 2824477...
  • Page 35 True-rms Digital Multimeters Parts MP16 MP30 MP12 MP42-44 MP49 XBT1 H15-18 (4x) XBT2-3 H7-14 (8x) MP45 MP46 H1-6 (6x) est34.emf Figure 5. Replacement Parts...
  • Page 36 287/289 Calibration Manual...

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