Fluke 88 V User manual

®
Model 88 V
Automotive Multimeter
Users Manual
99 Washington Street
Melrose, MA 02176
Fax [phone]
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. Electrical Characteristics of the Terminals............................................................................... 73
20. Min Max Recording Specifications ........................................................................................... 74

vii
List of Figures
Figure Title Page
1. 88 V Automotive Multimeter Front............................................................................................ 5
2. Measuring AC and DC Voltage ................................................................................................ 14
3. Testing for Continuity ................................................................................................................ 17
4. Measuring Resistance .............................................................................................................. 19
5. Measuring Capacitance ............................................................................................................ 21
6. Testing a Diode ......................................................................................................................... 23
7. Measuring Current .................................................................................................................... 26
8. Components of Duty Cycle Measurements.............................................................................. 29
9. Measuring RPM with Inductive Pickup..................................................................................... 37
10. Testing MAP or BP/MAP Sensors with Frequency Output...................................................... 39
11. Measuring Internal Resistance on an Ignition Coil .................................................................. 41
12. Measuring Pulse Width on a Port Fuel Injector........................................................................ 43
13. Testing Ripple Voltage on an Alternator .................................................................................. 45
14. Measuring Voltages on a Typical Oxygen Sensor................................................................... 47
15. Measuring Starter Circuit Voltage Drop ................................................................................... 49
16. Testing the Throttle Position Sensor Resistance..................................................................... 51
17. Isolating Circuit Causing Current Drain.................................................................................... 53

Model 88 V
Users Manual
viii
18. Measuring the No-Load Voltage of a Battery........................................................................... 55
19. Testing for Continuity in a Switch ............................................................................................. 57
20. Testing the Current Fuses ........................................................................................................ 59
21. Battery and Fuse Replacement................................................................................................ 61
22. Replaceable Parts..................................................................................................................... 64

Automotive Multimeter
Introduction
Introduction
XWWarning
Read "Safety Information" before you use the
Meter.
The Model 88 V Automotive Multimeter (“the Meter”) is a
hand-held, battery-operated measurement device used for
voltage, continuity, resistance, current, diode, capacitance,
frequency, temperature, RPM, pulse width, and duty cycle
measurements.
To register your product, visit register.fluke.com
Safety Information
The Meter complies with:
•EN61010-1:2001
•ANSI/ISA S82.01-2004
•CAN/CSA C22.2 No. 1010.1:2004
•UL61010-1
•Measurement Category III, 1000 V, Pollution
Degree 2
•Measurement Category IV, 600 V, Pollution
Degree 2
In this manual, a Warning identifies conditions and actions
that pose hazards to the user. A Caution identifies
conditions and actions that may damage the Meter or the
equipment under test.
Electrical symbols used on the Meter and in this manual
are explained in Table 1.
1

Model 88 V
Users Manual
2
XWWarning
To avoid possible electric shock or personal
injury, follow these guidelines:
•Use this Meter only as specified in this
manual or the protection provided by the
Meter might be impaired.
•Do not use the Meter if it is damaged.
Before you use the Meter, inspect the
case. Look for cracks or missing plastic.
Pay particular attention to the insulation
surrounding the connectors.
•Make sure the battery door is closed and
latched before operating the Meter.
•Replace the battery as soon as the
battery indicator (M) appears.
•Remove test leads from the Meter before
opening the battery door.
•Inspect the test leads for damaged
insulation or exposed metal. Check the
test leads for continuity. Replace
damaged test leads before you use the
Meter.
•Do not apply more than the rated voltage,
as marked on the Meter, between the
terminals or between any terminal and
earth ground.
•Never operate the Meter with the cover
removed or the case open.
•Use caution when working with voltages
above 30 V ac, 42 V ac peak, or 60 V dc.
These voltages pose a shock hazard.
•Use only the replacement fuses specified
by the manual.
•Use the proper terminals, function, and
range for measurements.
•Avoid working alone.
•When measuring current, turn off circuit
power before connecting the Meter in the
circuit. Remember to place the Meter in
series with the circuit.
•When making electrical connections,
connect the common test lead before
connecting the live test lead; when
disconnecting, disconnect the live test
lead before disconnecting the common
test lead.
•Do not use the Meter if it operates
abnormally. Protection may be impaired.
When in doubt, have the Meter serviced.
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
FAX [phone] - TestEquipmentDepot.com