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Fluke 27 II Calibration Information Manual
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Fluke 27 II Calibration Information Manual

Fluke 27 II Calibration Information Manual

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Introduction
To prevent electric shock or injury, do not do 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.
This document provides adjustment and performance test procedures for the Fluke 27 II/28 II
Digital Multimeters (the Meter or the Product).
See the 27II/28 II Users Manual for complete operating instructions.
Contact Fluke
Fluke Corporation operates worldwide. For local contact information, go to our website:
www.fluke.com.
To register your product, or to view, print, or download the latest manual or manual supplement,
go to our website.
+1-425-446-5500
fluke-info@fluke.com
Safety Information
General Safety Information is in the printed Safety Information document that ships with the
Product and at www.fluke.com. More specific safety information is listed where applicable.
April 2010 Rev. 1, 10/24
Fluke Corporation. All rights reserved.
©2010-2024
Specifications are subject to change without notice.
All product names are trademarks of their respective companies.
Digital Multimeters
Calibration Information
 Warning
27 II/28 II
1

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Summary of Contents for Fluke 27 II

  • Page 1 The information provided in this document is for the use of qualified personnel only. This document provides adjustment and performance test procedures for the Fluke 27 II/28 II Digital Multimeters (the Meter or the Product). See the 27II/28 II Users Manual for complete operating instructions.

  • Page 2: Specifications

    Fuse Test.)  Specifications Product specifications are in the Users Manual available at www.fluke.com. Basic Maintenance  Warning To prevent possible electrical shock, fire, or personal injury, to avoid possible electric shock or personal injury, repairs or servicing covered in this manual should be done only by qualified personnel.

  • Page 3: Product Disposal

    Digital Multimeters Basic Maintenance Warning To avoid electrical shock or personal injury, remove the test leads and any input signals before you replace the battery or fuses. Product Disposal Dispose of the Product in a professional and environmentally sound manner: Delete personal data on the Product before disposal.

  • Page 4: Static Awareness

    27 II/28 II Calibration Information Static Awareness   Semiconductors and integrated circuits can be damaged by electrostatic  discharge during handling. This notice explains how to minimize damage to these components. 1. Understand the problem. 2. Learn the guidelines for proper handling.

  • Page 5: Replace The Batteries

    Digital Multimeters Basic Maintenance Replace the Batteries Warning To prevent possible electrical shock, fire, or personal injury: Batteries contain hazardous chemicals that can cause burns or explode. If exposure  to chemicals occurs, clean with water and get medical aid. Repair the Product before use if the battery leaks.

  • Page 6: Replace The Fuses

    27 II/28 II Calibration Information Replace the Fuses Warning To prevent possible electrical shock, fire, or personal injury, install ONLY specified Table replacement fuses with the amperage, voltage, and speed ratings shown in To examine or replace the Meter fuses, see Figure 1.

  • Page 7: Performance Tests

    Digital Multimeters Performance Tests Performance Tests Warning To prevent electric shock, do not do the performance test procedures unless the Meter is fully assembled. These performance tests verify the complete operation of the Meter and check the accuracy of each Meter function against its specifications. Performance tests should be performed bi- annually to ensure that the Meter is within accuracy specifications.
  • Page 8 27 II/28 II Calibration Information Test Meter Accuracy To test the accuracy of the Meter, do the steps in Table Table 2. 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...
  • Page 9 Performance Tests Table 2. 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 DC Volts 330 ...

  • Page 10: Calibration Adjustments

    27 II/28 II Calibration Information Table 2. Accuracy Tests (cont.) Display Reading Test Step Range 5520A Output Function 27 II 28 II Min = -1.898 to 8 Vpp, 2 kHz Sq. VDC Peak Min/ -2.102 Wave, DC offset Max – 28 II Max = 5.896 to...

  • Page 11: Change The Password

    Digital Multimeters Calibration Adjustments Enter and Display the Four-Digit Password When the Meter was manufactured it was given a default password of 1234. These pushbuttons are used to select the password. Each pushbutton represents the indicated digit: = 1, = 2, = 3, = 4, = 5,...
  • Page 12 27 II/28 II Calibration Information If the revision number is 010: 1. Remove the PCB from the top case. 2. Apply power to the PCB. Clip on a dc voltage between 3.5 V and 5 V at the test points marked + and - at the edge of the board.
  • Page 13 Digital Multimeters Calibration Adjustments If the revision number is 011 or higher: 1. Apply power to the PCB. Clip 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 Figure 4.

  • Page 14: Other Pushbutton Functions

    27 II/28 II Calibration Information Other Pushbutton Functions lists and describes the Meter pushbuttons and describes what happens when pushed Table 3 after the password has been entered and is pushed. Table 3. Pushbutton Functions During CAL Mode Button CAL Mode Description Push and hold to test the present function.
  • Page 15 Digital Multimeters Calibration Adjustments Table 4. 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 C-03 60.0 mV, 60 Hz C-04 600.0 mV, 60 Hz C-05 600.0 mV, 20 kHz ...
  • Page 16 27 II/28 II Calibration Information Table 4. 27 II Calibration Adjustment Steps (cont.) Function Adjustment Step Input Value (Switch Position) C-29 0.0 mA, 0 Hz C-30 600.0 A, 60 Hz C-31 6.0 mA, 60 Hz  C-32 60.0 mA, 60 Hz...
  • Page 17 Digital Multimeters Disassemble the Meter Table 5. 28 II Calibration Adjustment Steps (cont.) Function Adjustment Step Input Value (Switch Position) C-14 600.0 Ω C-15 6.000 kΩ C-16 60.00 kΩ  C-17 600.0 kΩ (Ohms) C-18 6.000 MΩ C-19 0.000 Ω C-20 50.0 MΩ...

  • Page 18: How To Retain The Ip67 Rating

    27 II/28 II Calibration Information 11. Use the screwdriver to remove four Printed Circuit Assembly (PCA) input screws (H5). 12. Use the screwdriver to remove six PCA screws (H4) from the board. 13. Remove the PCA from the top case.

  • Page 19: Replacement Parts

    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 To ensure your Meter meets the IP67 rating, return the Meter to a qualified Fluke Service Center. Replacement Parts...
  • Page 20 27 II/28 II Calibration Information Figure 5. Exploded View H1 (6) MP3 (2) BT1 (3) H2 (6) H3 (6) MP8 (2) H4 (7) H4 (7) H5 (4) MP10 MP14 MP11 MP12 MP13 MP15 MP16 MP17 MP18 MP19 MP20...
  • Page 21 SCREW,4-14,.510,PAN,PHILLIPS,STEEL,ZINC- 853668 CHROMATE,THREAD CUT SCREW,M3X0.5,6MM,PAN,PHILLIPS,STEEL,ZINC-CHROMATE 2743764 FLUKE-2X-2-2010,BATTERY DOOR, WITHOUT BATTERY 3321030 CONTACTS FLUKE-2X-II-8007,GASKET, BATT DOOR, FLUKE 27-II AVG AND 3439087 FLUKE 28-II TRMS METERS FLUKE 89-4-8012 ,BATTERY CONTACT, DUAL 666435 FLUKE-2X-2-2014,FUSE ACCESS DOOR, 27-2 AVG AND 28-2 3400480 TRMS MULTIMETER...
  • Page 22 FLUKE-2X-2-2011,HOLSTER w/Tilt Stand 3321048 Shown TL75-4201,TEST LEADS 855742 Shown 80BK-A-8001, TYPE K THERMOCOUPLE ASSEMBLY (for 28-2) 2747900 Shown FLUKE 87-5-8009,TILTSTAND 2074040 Shown 27 II / 28 II Getting Started Manual 3368142 Shown 27 II / 28 II Users Manual CD 3368139 Shown...
  • Page 23 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 24 27 II/28 II Calibration Information...

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