Digital 8508 Service Manual

® 8508A Reference Multimeter Service Manual September 2004 Rev. 1, 8/08 © 2004, 2008 Fluke Corporation, All rights reserved. Specification

8508A Service Manual vi

8508A Service Manual 4-12 Fuse Replacement and Line-Voltage Selection WCaution To avoid fire hazard, use only the fuse arrangements that appear in the

Maintenance Self Test 4 4-13 Rear-Input Current Fuse F2 (Rear Inputs Option) The rear input option includes a fuse (F2) to limit the current at

8508A Service Manual 4-14 Test No 28 Err 2281 P011 10V Range Positive Gain Check Test No 29 Err 2291 P012 10V Range Negative Gain Check Test No

Maintenance Self Test 4 4-15 AC VOLTS Test No 80 Err 2801 P015 100mV AC Range: Zero Input Check Test No 81 Err 2811 P016 100mV AC Range:

8508A Service Manual 4-16 Fatal Errors Fatal errors are reported only via the front panel display. These messages are all coded as 9000 series faults.

Maintenance Self Test 4 4-17 9005 Serial Interface Fault Addr id When this fatal error occurs the system will continuously try to repeat w

8508A Service Manual 4-18 9006 - Serial Loop Mismatch xxxxxxxx id xxxxxxxx is the actual data received in binary format. See Table 4-7 for descript

Maintenance Self Test 4 4-19 Table 4-8. Execution Errors 1000- EXE queue empty when recalled 1024- Illegal Range/Input Combination 1001- Op

8508A Service Manual 4-20 Table 4-9. Device Dependent Errors Correction Errors 2000- Error During Zero Cal The input signal was outside : Zero +/-

5-1 Chapter 5 List of Replaceable Parts Title Page Introduction...

vii List of Figures Figure Title Page 1-1. 8508A Dimentional Outline Drawing ...

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List of Replaceable Parts Introduction 5 5-3 Introduction This chapter contains an illustrated list of replaceable parts for the 8508A Referenc

8508A Service Manual 5-4 Parts Lists The following tables list the replaceable parts for the 8508A Reference Multimeter. Parts are listed by assembly;

List of Replaceable Parts Parts Lists 5 5-5 22266234MP1MP2MP5MP7MP9 MP10H3H1H2MP3MP44MP6MP8 avw025.eps Figure 5-1. 8508A Final Assembly riešeni

8508A Service Manual 5-6 Table 5-2. 8508A Chassis Assembly Reference Designator Description Fluke Part No Tot Qty Notes A1 DC PCA 1988709 1 * A2

List of Replaceable Parts Parts Lists 5 5-7 84610STICK OVERSMALL HOLESMP4W2MP3DC PCAAC PCAOhms PCATop ViewBottom viewH12H13H2A2A4W4A1H12102H5 a

8508A Service Manual 5-8 2A5WHITE & GREENBROWNREDBLACKBLUEA401DC PCABottom viewW5W6A401H14FORM RIBBON CABLESAS SHOWN AND CONNECTTO CONNECTORS ON

List of Replaceable Parts Parts Lists 5 5-9 T22H112H32H62MP177NOT REQUIRED IFREAR INPUT FITTEDA4Digital PCAT2H9H8H14H7H6W7H10H4H7H52T1H11H102MP

8508A Service Manual 5-10 Table 5-3. A5 Bezel (front panel) Assembly Reference Designator Description Fluke Part No Tot Qty Notes A1 Display PCB Ass

List of Replaceable Parts Parts Lists 5 5-11 H27MP1MP54MP2MP222MP4H7H4126H56J6J1J2J3J4J5ALL WIRES EXCEPT GREENLOOP ONCE THROUGH FERRITE REDREDR

8508A Service Manual viii

8508A Service Manual 5-12 Table 5-4. A6 Rear Input Assembly (optional) Reference Designator Description Fluke Part No Tot Qty Notes A1 Rear Input P

List of Replaceable Parts Parts Lists 5 5-13 22H9BLACKBROWNREDORANGEBLUEWHITEL1GREENH9H10FH1ORANGE WIREORANGE WIREF1RED WIREBROWN WIREWHITE WIR

8508A Service Manual 5-14 riešenia na presné meranie™Elso Philips Service; tel: +421 32 6582410email: [email protected]; web: www.elso.sk

1-1 Chapter 1 Introduction and Specifications Title Page Introduction...

8508A Service Manual 1-2 riešenia na presné meraniehttp://www.elso.sk

Introduction and Specifications Introduction 1 1-3 Introduction The Fluke 8508A Reference Multimeter (hereafter "the Multimeter") is

8508A Service Manual 1-4 XW Safety – Read First Warning: To avoid possible electric shock, personal injury, or death, read the following before using

Introduction and Specifications Safety Considerations 1 1-5 Symbols The following safety and electrical symbols may be used on the Multimeter o

8508A Service Manual 1-6 Service Information In case of difficulty within the 1-year Warranty period, return the Multimeter to a Fluke Service Center

Introduction and Specifications Specifications 1 1-7 General Specifications Power Voltage 115 V Setting ...

Manual Supplement © 2009 Fluke Corporation. All rights reserved. Printed in U.K. x Manual Title: 8508A Service Supplement Issue: 1 Print Date:

8508A Service Manual 1-8 Maximum Voltage and Current Inputs Notes to maximum voltage and current input specifications • Maximum DC input equal to max

Introduction and Specifications Specifications 1 1-9 DC Voltage DC Voltage [1] [2] [3] Uncertainty Relative to Cal Stds Absolute Uncertainties

8508A Service Manual 1-10 DC Current DC Current [1] [2] [3] Uncertainty Relative to Cal Stds Absolute Uncertainties ± (ppm Reading + ppm Range)[4] R

Introduction and Specifications Specifications 1 1-11 AC Voltage AC Voltage [1] [2] [6] [7] Uncertainty Relative to Cal Stds Absolute Uncerta

8508A Service Manual 1-12 AC Voltage (Secondary Specifications)[1] [2] Temperature Coefficient 15 °C - 30 °C 5 °C - 15 °C 30 °C - 40 °C Range Frequen

Introduction and Specifications Specifications 1 1-13 AC Current AC Current [1] [2] [6] [9] Uncertainty Relative to Cal Stds Absolute Uncertai

8508A Service Manual 1-14 AC Current (Secondary Specifications) [1] [2] [6] [9] Temperature Coefficient 15 °C - 30 °C 5 °C - 15 °C 30 °C - 40 °C Inpu

Introduction and Specifications Specifications 1 1-15 Resistance Resistance [1] [2] [3] [9] Uncertainty Relative to Cal Stds Absolute Uncertai

8508A Service Manual 1-16 Resistance - Normal Mode (Secondary Specifications) [1] [2] [3] [10] Temperature Coefficient 15 °C - 30 °C 5 °C - 15 °C 30

Introduction and Specifications Specifications 1 1-17 Temperature Temperature Readout [1] [2] [3] Typical Equivalent Temperature Measurement Un

8508A Service Manual Supplement 3/09 1 Change #1 On page 4-12, replace Table 4-1 with the following: Table 4-1. Power Input Fuse 1 8508A Line Setting

8508A Service Manual 1-18 Read Rate and Additional Uncertainty Read Rate and Additional Uncertainty Read Rate (readings/second) Additional Errors[13]

Introduction and Specifications Applying the Specifications 1 1-19 Applying the Specifications Introduction The Fluke 8508A has been designed s

8508A Service Manual 1-20 Applying User’s Calibration Uncertainties When the 8508A is calibrated by another laboratory the uncertainties of the calibr

Introduction and Specifications Applying the Specifications 1 1-21 Ratio Measurements The 8508A Ratio mode will automatically take measurements

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2-1 Chapter 2 Theory of Operation Title Page Introduction...

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Theory of Operation Introduction 2 2-3 Introduction This chapter provides a board-level theory of operation for the 8508A Reference Multimeter.

8508A Service Manual 2-4 A6 Rear InputAssemblyA5 Bezel Assembly andA5A1 Display PCARear PanelKeyboard and Display MemoryIEEE (GPIP)to SerialIEEE-4

Theory of Operation Overall Functional Description 2 2-5 A 16-pin cable (W3) enables serial control and measurement data to move between the A4

Warranty Each Fluke product is warranted to be free from defects in material and workmanship under normal use and service. The warranty period is one

8508A Service Manual 2-6 measurement across the unknown resistor. Configuration relays on the A1 DC PCA perform the change in terminal connections bet

Theory of Operation Overall Functional Description 2 2-7 LinePower+17 V regulator +17 V dc+8 V dc+5 V dc+8 V regulator+5 V regulatorT2F1T1+17 V

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3-1 Chapter 3 Calibration and Verification Title Page Introduction...

8508A Service Manual 3-2 Applicable Verification Tolerance and Conditions ... 3-32 Preparation...

Calibration and Verification Introduction 3 3-3 Introduction This chapter describes the calibration menus, and lists the calibration and perfor

8508A Service Manual 3-4 Non-Nominal Values The Set facility allows the user to set the calibration target to the value of the calibration source avai

Calibration and Verification Calibration Menus 3 3-5 This menu defines four menu keys: Auto Indicates to the user that the calibration point i

8508A Service Manual 3-6 SPOT CAL Menu This menu is obtained by pressing the Set key in the CALIBRATION menu when the Multimeter is in ACV Spot Freque

Calibration and Verification Calibration Menus 3 3-7 ±10 % of the stored frequency is accuracy enhanced by reducing frequency response flatness

i Table of Contents Chapter Title Page 1 Introduction and Specifications... 1-1 Introduct

8508A Service Manual 3-8 adj138f.eps SER# Menu The SER# menu provides the selection: Enter Stores the new serial number, de-activates the keyboard,

Calibration and Verification Routine Calibration 3 3-9 Non-volatile input-offset compensation adjustment is available only when the rear panel

8508A Service Manual 3-10 used to provide calibration uncertainties to be combined with the 8508A Relative to Standards specifications to determine th

Calibration and Verification Routine Calibration 3 3-11 3. Set the rear panel Calibration switch to Enable. Removal of any calibration sticker

8508A Service Manual 3-12 configuration used by Fluke for Multimeter calibration. Figure 3-1 shows the interconnections used in detail. If alternate l

Calibration and Verification Routine Calibration 3 3-13 CURRENTOUTPUTHILOCURRENTOUTPUTHILO8508AREFERENCE MULTIMETER8508A-7000KPM8508A - 7000K4

8508A Service Manual 3-14 ADC Calibration ADC (analog to digital converter) calibration aligns the different resolutions available from the Multimete

Calibration and Verification Routine Calibration 3 3-15 Range Zero and Gain Calibration Procedure After the initial setup and connecting up, us

8508A Service Manual 3-16 Range Gain Points 1. On the Calibrator, select the positive Range Gain point Output value. 2. On the Multimeter, Press CAL

Calibration and Verification Routine Calibration 3 3-17 Table 3-4. AC Voltage Calibration Points and Sequence 8508A Range Point Voltage Freq

8508A Service Manual ii 3 Calibration and Verification... 3-1 Introduction...

8508A Service Manual 3-18 Resistance Calibration When calibrating the resistance function, each of the resistance modes (Normal, LoI, TruΩ, TruΩ LoI a

Calibration and Verification Routine Calibration 3 3-19 Initial Setup and Connections 1. Press the Ω key and select the 200 Ω range. 2. Press

8508A Service Manual 3-20 Calibration is complete when the Busy legend goes out and the calibrated measurement is displayed Range Gain Point 1. On th

Calibration and Verification Routine Calibration 3 3-21 Zero Point 1. On the Multimeter, select the required range. 2. On the Calibrator, sel

8508A Service Manual 3-22 Zero Point 1. On the Multimeter, select the required range. 2. On the Calibrator, select zero Ω and Operate. Alternatively

Calibration and Verification Routine Calibration 3 3-23 Zero Point 1. On the Multimeter, select the required range. 2. On the Calibrator, sel

8508A Service Manual 3-24 For the 2 GΩ range use the 1 GΩ standard resistor in place of the calibrator. To avoid the requirement for a 10 GΩ standard,

Calibration and Verification Routine Calibration 3 3-25 5. Press SAMPLE to initiate the calibration operation. Calibration is complete when th

8508A Service Manual 3-26 Table 3-6. DC Current Calibration Points and Sequence 8508A Range Point Current Zero 0 μA Range Gain +ve +100 μA 200 μ

Calibration and Verification Routine Calibration 3 3-27 Range Gain Points 1. On the Calibrator, select the positive Range Gain point Output va

Contents (continued) iii Removing the A5 Bezel Assembly... 4-9 Removing the A5A

8508A Service Manual 3-28 Table 3-7. AC Current Calibration Points and Sequence 8508A Range Point Current Frequency Zero (5 % Range) 10 μA 300 Hz 2

Calibration and Verification Routine Calibration 3 3-29 Alternatively, the 1MHz frequency reference may be used directly as an input signal for

8508A Service Manual 3-30 6. Press the CONFIG key and select Filt, LoI and 4wΩ. Repeat steps 3 and 4. 7. Press the CONFIG key and select 2wΩ. Repeat

Calibration and Verification Performance Verification 3 3-31 To Calibrate at Spot Frequencies Spot Calibration is available only when in AC Vol

8508A Service Manual 3-32 Equipment Requirements The equipment required for performance verification of the Multimeter is identical to the equipment r

Calibration and Verification Performance Verification 3 3-33 * Fluke guarantees the Multimeter’s performance verification using specifications

8508A Service Manual 3-34 5. Note the Multimeter’s reading. Compare the result with the allowable tolerance, taking into account any known error from

Calibration and Verification Performance Verification 3 3-35 AC Voltage Checks XW Warning The Calibrator can deliver a lethal electric shock.

8508A Service Manual 3-36 Table 3-9. AC Voltage Verification Points and Sequence 8508A Range Voltage Frequency 8508A Filter Tolerance 1 100 mV 20

Calibration and Verification Performance Verification 3 3-37 Table 3-9. AC Voltage Verification Points and Sequence (cont) 8508A Range Voltag

8508A Service Manual iv

8508A Service Manual 3-38 Procedure Perform the following sequence for each resistance mode and each range, as listed in Table 3-10, starting with the

Calibration and Verification Performance Verification 3 3-39 10. Press the Ω key. 11. Press the CONFIG key and select Filt , RESL7, 4wΩ, and Lo

8508A Service Manual 3-40 Table 3-10. Resistance Verification Points and Sequence (cont) Tolerance 1 8508A Range Resistance HiVΩ2 0 GΩ Perform inpu

Calibration and Verification Performance Verification 3 3-41 6. On the calibrator select the value required for verification in the negative p

8508A Service Manual 3-42 Procedure Repeat the following sequence for each range, starting with the 200μA range and working up to the 20A range, as li

Calibration and Verification Performance Verification 3 3-43 Frequency Checks Equipment Configuration 1. Ensure that the calibrator output is

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Some semiconductors and custom IC's can bedamaged by electrostatic discharge duringhandling. This notice explains how you canminimize the c

5. USE STATIC SHIELDING CONTAINERS FOR HANDLING AND TRANSPORT.6. DO NOT SLIDE S.S. DEVICES OVER ANY SURFACE.7. AVOID PLASTIC,VINYL AND STYROFO

4-1 Chapter 4 Maintenance Title Page Introduction...

v List of Tables Table Title Page 3-1. Required Equipment for Calibration and Performance Verification... 3-10 3-2. Calibrati

8508A Service Manual 4-2 riešenia na presné meraniehttp://www.elso.sk

Maintenance Introduction 4 4-3 Introduction This chapter contains access procedures for replaceable assemblies (PCAs) and error messages assoca

8508A Service Manual 4-4 Cabling and Wiring Connections To help avoid making incorrect cable connections during reassembly, refer to the internal wiri

Maintenance Access Procedures 4 4-5 Removing the A1 DC PCA Use the following procedure to remove the A1 DC PCA. See Figure 4-2. 1. Position th

8508A Service Manual 4-6 Removing the A2 AC PCA Use the following procedure to remove the A2 AC PCA. See Figure 4-3. 1. Position the unit on the work

Maintenance Access Procedures 4 4-7 Removing the A3 Ohms PCA Use the following procedure to remove the A3 Ohms PCA. See Figure 4-4. 1. Positi

8508A Service Manual 4-8 Removing the A4 Digital PCA Use the following procedure to remove the A4 Digital PCA. See Figure 4-5. 1. Position the unit o

Maintenance Access Procedures 4 4-9 Removing the A5 Bezel Assembly Use the following procedure to remove the A5 Bezel Assembly. See Figure 4-6.

8508A Service Manual 4-10 Removing the A5A1 Display PCA Use the following procedure to remove the A5A1 Display PCA. See Figure 4-7. 1. Remove the A5

Maintenance Access Procedures 4 4-11 Removing the A6 Rear Input Assembly Use the following procedure to remove the A6 Rear Input Assembly. See