Automotive Meter - Fluke

1 78 Automotive MeterUsers ManualFor IEC 61010 CAT II meters Only PN 666625 November 1998 , 9/00 1998, 2000 Fluke Corporation. All rights reserved. Printed in product names are trademarks of their respective of ContentsTitlePageWhat is in the 1 Using the Meter Safely .. 1 Getting Acquainted with the Meter .. 4 Rotary Switch .. 4 Input Jacks .. 6 Thermocouple Adapter .. 10 Standby (Sleep) Mode .. 10 Bar Graph .. 12 Autorange with "Floor".. 12 Typical Testing Applications .. 14G,F How to Measure Voltage .. 14L How to Test Diodes .. 16N, AdHow to Measure Current.

2 18w How to Test 20J How to Measure Resistance .. 22 RPM ut How to Measure RPM with the RPM80 Inductive Pickup (Optional) .. 2478 Users ManualiiHz s How to Use DC-Coupled HZ to Check BP/MAP Sensors .. 26Hz d How to Use AC-Coupled Hz on a Crankshaft Position Sensor .. 28m How to Measure Dwell on Conventional Ignitions .. 30% How to Measure Duty Cycle on a Feedback 32 C F How to Measure Temperature on a Coolant Temperature 34 How to Store Minimum and Maximum 36 How to Use the Bar Graph to Test a Throttle Position 38 How to Lock the Meter in a Measurement 40 Using the Holster and Flex-Stand.

3 40 Maintenance .. 42 Cleaning .. 42 Calibration .. 42 How to Test the Fuse .. 42 How to Replace the Battery or Fuse .. 42 Accessories and Parts .. of .. Unit Symbols .. Operations .. Parts and Accessories .. 4578 Users ManualivvList of FiguresFigure Switch .. Jacks .. the Bar Graph .. No-Load Voltage of Battery .. Diodes in Alternator Rectifier Bridge .. Circuit Causing Current Drain .. Continuity in a Switch .. Resistance to Check Coolant Temperature Sensor.

4 RPM with the (Optional) Inductive Pickup .. Barometric Pressure/Manifold Absolute Pressure Sensor .. AC Coupled-Frequency on a Crankshaft Position Sensor .. Dwell on a Conventional Ignitions .. Duty Cycle on a Feedback Carburetor .. the Temperature of Coolant Temperature MIN MAX to Check an Oxygen Sensor .. Bar Graph to Observe Sweep of Throttle Position Sensor (TPS) .. 3978 Users and Flex-Stand .. and Battery Replacement .. Parts .. 45 IGNITION/ENGINEC oilsComputer Temp SensorsCondensers (Capacitors)ConnectorsContacts SetDistributor CapEngine SpeedFeedback CarburetorsFuel Injectors (Electronic)Hall-Type SensorsIdle Air MotorsMAF SensorIgnition ModulesMagnetic PickupsMAP & BP Sensors0 SensorsThrottle Position SensorsSTARTING SYSTEMB atteryConnectorsInterlocks (neutral safety switch)SolenoidsStartersAmps DC*Bar GraphDwellContinuity% Duty CycleHzMillivoltsMIN MAXOhmsRPM**Volts ACVolts DC* Used with Fluke 80i-410 or 80i-1010 current clamp.

5 ** With optional RPM 80 Inductive Pickup GUIDET emperatureCOOLING SYSTEMC onnectorsFan MotorRadiatorRelaysTemperature SensorsTemperature SwitchesCHARGING SYSTEMA lternatorsComputerized RegulatorsConnectorsDiodes, (AC Ripple)RegulatorsDiode RectifierBODY ELECTRICC ompressor ClutchLighting CircuitsRelay and Motor DiodesTransmissionsAmps DC*Bar GraphContinuity% Duty CycleHzMillivoltsMIN MAXOhmsRPM **Volts ACVolts DC* Used with Fluke 80i-410 or 80i-1010 current clamp.** With optional RPM 80 Inductive Pickup accessory. APPLICATIONS GUIDE (cont)TemperatureDwellFUSED10A30V C F300V30 VRPM+COMVCATRPM211 HzMIN / MAXPRESSOFFA C FHzVHzV78 Automotive METER1 SEC2 SEC034000AC DCmVMk HzRPM2 MINMAXVAUTO121 DISPLAYBAR GRAPHPUSHBUTTONROTARY SWITCHINPUT JACKSSKID RESISTANT PADSPHILLIPS-HEAD SCREWSSAFETY INFORMATIONFUSE RATINGBATTERY TYPEBACK WARNING TO AVOID DAMAGE OR INJURY,USE ONLY IN PROTECTED CIRCUITS WHICHCAN NOT EXCEED 4800 PREVENT FIRE, INSTALL FUSE WITHAMP/VOLT RATINGS AVOID ELECTRICAL SHOCK, REMOVETEST LEADS BEFORE OPENING CORPORATIONMADE IN PATENTS.

6 4,556,867 4,532,470F 15A 600 VMIN INTERRUPT RATING 10 000A 9V NEDA 16046F22 006 PFRONTWhat is in the Manual1 WarningRead "Using the Meter Safely" before usingthe Automotive tests included in this manual areintended to help you learn how to use the your car s service manual for specificprocedures that apply to your is in the ManualThis manual provides safety information, operating in-structions, basic maintenance procedures, and specifica-tions for the Fluke 78 Automotive Meter (referred to as"the Meter ").To contact Fluke , call one of the following telephonenumbers:USA: 1-888-99- Fluke (1-888-993-5853)Canada: 1-800-36- Fluke (1-800-363-5853)Europe: +31 402-678-200 Japan: +81-3-3434-0181 Singapore: +65-738-5655 Anywhere in the world: +1-425-446-5500Or, visit Fluke s Web site at to the 78 Service Manual (P/N 666617) for com-plete servicing information.

7 If the Meter is damaged orsomething is missing, contact the place of purchase Corporation Box 9090 Everett WA 98206-9090 Fluke Europe Box 1186 5602 Eindhoven, The NetherlandsUsing the Meter SafelyUse the Meter as described in this manual. Otherwise thesafety features provided by the Meter might be Warning identifies conditions and actions that posehazards to the user; a Caution identifies conditions andactions that might damage the Meter . International elec-trical symbols used on the Meter are shown in Table 1. SymbolsSymbolMeaningImportant information. See current (AC)Direct current (DC)Alternating or direct current (AC or DC)DiodeGroundFuseDouble insulation (Protection Class II)Conforms to European Union directives78 Users Manual2 Read First: Safety InformationThis Meter complies with EN 61010-1:1993,ANSI/ISA and CAN/CSA Overvoltage Category II.

8 Usethe Meter only as specified in this UsersManual, otherwise the protection provided bythe Meter may be impaired. WarningTo avoid possible electric shock or personalinjury: Avoid working alone. Do not use the Meter if it is use, inspect the case for cracksor missing plastic. Pay particular atten-tion to the insulation surrounding theconnectors. Inspect the test leads for damaged in-sulation or exposed metal. Check testlead continuity. Replace damaged leads. Do not use the Meter if it operates ab-normally. Protection may be in doubt, have the Meter serviced. Do not operate the Meter around explo-sive gas, vapor or dust.

9 Do not apply more than the rated volt-age, as marked on the Meter , betweenterminals or between any terminal andearth ground. Before each use, verify the Meter s op-eration by measuring a known voltage. When servicing the Meter , use onlyspecified replacement parts. Use caution when working above 30 V acrms, 42 V ac peak, or 60 V dc. Such volt-ages pose a shock hazard. Keep your fingers behind the fingerguards on the probe when makingmeasurements. Connect the common test lead beforeconnecting the live test lead. Disconnectthe live test lead first. Remove test leads from the Meter beforeopening the the Meter Safely3 Use only a single 9 V battery, properlyinstalled in the Meter case, to power themeter.

10 Follow all equipment safety procedures. Before measuring current, check the me-ter s fuses (see How to Test the Fuse ). Never touch the probe to a voltagesource when the test leads are pluggedinto the 10 A input jack. Always use clamp-on probes (dc currentclamps) when measuring current ex-ceeding 10 A. DO NOT connect thermocouple to volt-ages exceeding 30 V. To avoid false readings, which couldlead to possible electric shock or per-sonal injury, replace the Meter s batteryas soon as the low battery indicator (N) avoid possible damage to the Meter or toequipment under test: Disconnect the power to the circuit un-der test and discharge all high voltagecapacitors before testing resistance,continuity or diodes.