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Model 88 V
®

Model 88 V
Automotive Multimeter
Users Manual

99 Washington Street
Melrose, MA 02176
Fax 781-665-0780
TestEquipmentDepot.com


i
Table of Contents
Title
Page

Introduction ........................................................................................................................ 1

Contacting Fluke ................................................................................................................ 1

Safety Information.............................................................................................................. 1

The Meter's Features......................................................................................................... 5

Power-Up Options......................................................................................................... 13

Automatic Power-Off..................................................................................................... 13

Input Alert Feature ..................................................................................................... 13

Making Measurements ...................................................................................................... 14

Measuring AC and DC Voltage .................................................................................... 14

Measuring Temperature ............................................................................................... 15

Testing for Continuity.................................................................................................... 16

Measuring Resistance .................................................................................................. 18

Using Conductance for High Resistance or Leakage Tests........................................ 20

Measuring Capacitance ................................................................................................ 21

Testing Diodes .............................................................................................................. 22

Measuring DC or AC Current ....................................................................................... 24

Measuring Frequency ................................................................................................... 27
Model 88 V
Users Manual

ii

Measuring Duty Cycle .................................................................................................. 29

Measuring Pulse Width................................................................................................. 30

Bar Graph .......................................................................................................................... 30

Zoom Mode (Power Up Option Only)........................................................................... 30

Uses for the Zoom Mode .............................................................................................. 31

HiRes Mode ....................................................................................................................... 31

MIN MAX Recording Mode ............................................................................................... 31

Smooth Feature (Power Up Option Only)......................................................................... 32

AutoHOLD Mode ............................................................................................................... 34

Relative Mode.................................................................................................................... 34

Using the Meter for Automotive Applications.................................................................... 34

Measuring RPM ............................................................................................................ 35

Testing MAP or BP/MAP Sensors with Frequency Output ......................................... 38

Measuring Internal Resistance of an Ignition Coil ....................................................... 40

Measuring Pulse Width on a Port Fuel Injector ........................................................... 42

Testing Ripple Voltage on an Alternator ...................................................................... 44

Measuring Voltages on a Typical Oxygen Sensor ...................................................... 46

Measuring Starter Circuit Voltage Drop ....................................................................... 48

Testing the Throttle Position Sensor Voltage .............................................................. 50

Testing the Throttle Position Sensor Resistance ........................................................ 50

Isolating a Circuit Causing a Current Drain ................................................................. 52

Measuring System Voltage .......................................................................................... 54

Testing for Continuity in a Switch................................................................................. 56

Maintenance ...................................................................................................................... 58

General Maintenance ................................................................................................... 58

Testing the Fuse ........................................................................................................... 58

Replacing the Battery ................................................................................................... 59

Replacing the Fuses ..................................................................................................... 60



Contents
(continued)


iii

Service and Parts .............................................................................................................. 60

Specifications..................................................................................................................... 66

General Specifications.................................................................................................. 66

Detailed Specifications ................................................................................................. 67



v
List of Tables
Table Title
Page
1.
Electrical Symbols..................................................................................................................... 4
2.
88 V Automotive Multimeter Front Controls ............................................................................. 5

3. Input
Terminals ......................................................................................................................... 6

4.
Rotary Switch Positions ............................................................................................................ 7

5. Pushbuttons .............................................................................................................................. 8

6. Display
Features ....................................................................................................................... 11

7.
Functions and Trigger Levels for Frequency Measurements .................................................. 28

8.
MIN MAX Functions .................................................................................................................. 33

9.
Battery Charge Voltages........................................................................................................... 54

10. Replacement
Parts.................................................................................................................... 62

11. Accessories ............................................................................................................................... 65

12.
AC Voltage Function Specifications ......................................................................................... 67

13.
DC Voltage, Resistance, and Conductance Function Specifications...................................... 68

14. Temperature
Specifications ...................................................................................................... 68

15.
Current Function Specifications................................................................................................ 69

16.
Capacitance and Diode Function Specifications ..................................................................... 70

17. Frequency
Counter
Specifications ........................................................................................... 71
Model 88 V
Users Manual

vi

18.
Frequency Counter Sensitivity and Trigger Levels .................................................................. 72

19.
Electr