Actron Digital Multitester CP7674 User Manual

d. Connect the test leads to the circuit under test, observing proper  
polarity.  
DC10A  
Range  
DESCRIPTIONANDSPECIFICATIONS  
Resolution  
Accuracy  
Voltage Burden  
CP7674 DIGITAL MULTITESTER  
INSTRUCTIONMANUAL  
DESCRIPTION: The Digital Multitester is a compact, hand-held, easy to use  
precision instrument which is compatible both with home electrical applica-  
tions, as well as the electrical systems used in modern passenger cars and  
trucks. It may also be used to measure voltages in the computer control  
circuits of computer-controlled vehicles.  
e. Read the results on the digital display. If the display reads overrange  
(1.), switch to a higher range within the milliamps function.  
10A  
100mA  
± (1.5% rdg + 3 dgts) 300mV rms Max.  
Overload protection: unfused up to 10A for 15 seconds  
3.DC 10 AMPS MEASUREMENT  
a. Set the SELECTOR switch to the 10 Amps position.  
Resistance  
SAFETYGUIDELINES  
SPECIFICATIONS:  
b. Plug the BLACK test lead into the COMmon input jack on the  
multitester.  
Your Digital Multitester is designed for both home and automotive use. The following Safety  
Guidelines are provided when it is used for engine or vehicle testing. To prevent accidents that  
could result in serious injury and/or damage to your vehicle or test equipment, carefully follow  
these safety rules and test procedures.  
Max. Open  
Voltage  
Display – 3 1/2 digit, .5 inch LCD (Liquid Crystal Display)  
Range  
200  
Resolution  
0.1Ω  
AccuracyCircuit  
c. Plug the RED test lead into the 10 Amps input jack on the multitester.  
Automatic Polarity Sensing Display shows a minus (-) sign on the DC  
Volts and Amps functions when lead hookup is reversed.  
d.Connect the test leads to the circuit under test, observing proper  
polarity.  
2000Ω  
20KΩ  
1Ω  
Zero adjustment  
functions.  
Unit automatically zeroes on the Volts and Amps  
SAFETYEQUIPMENT  
NOTE: Some vehicles have an automatic release on  
the parking brake when the gear shift lever is re-  
moved from the PARK position. This feature must be  
disabled when it is necessary (for testing) to have the  
parking brake engaged when in the DRIVE position.  
Refer to your vehicle service manual for more infor-  
mation.  
± (1.0% rdg + 4 dgts)  
e. Read the result on the digital display.  
10Ω  
3.2V  
Fire Extinguisher  
Overrange indication Left side of display shows either “1” or “-1” when  
range in a function is exceeded.  
Never work on your car without having a suitable fire  
extinguisherhandy.A5-lborlargerCO ordrychemi-  
cal unit specified for gasoline/chem2ical/electrical  
firesisrecommended.  
4.RESISTANCEMEASUREMENT  
200KΩ  
2000KΩ  
100Ω  
1KΩ  
a. Set the SELECTOR switch to the required resistance  
position.  
(ohms)  
Operating temperature 0°C - 35°C (32°F - 95°F), 0-80% R.H.; 35°C -  
50°C (95°F - 122°F), 0-70% R.H.  
Fireproof Container  
HOTSURFACES  
Rags and flammable liquids should be stored only in  
fireproof,closedmetalcontainers.Agasoline-soaked  
rag should be allowed to dry thoroughly outdoors  
beforebeingdiscarded.  
b. Plug the BLACK test lead into the COMmon jack on the multitester.  
Avoid contact with hot surfaces such as exhaust  
manifoldsandpipes, mufflers(catalyticconverters),  
radiator and hoses. Never remove the radiator cap  
while the engine is hot, as escaping coolant under  
pressure may seriously burn you.  
Measurement rate  
2.5 measurements per second, nominal  
Diode Check  
c. Plug the RED test lead into the Volts (ohms) milliAmps input jack on  
the multitester.  
Power – Nine (9) volt alkaline or carbon zinc battery  
Use this test to check for open or shorted diodes. A good diode will show  
a low reading with the test leads connected in one polarity, and a high reading  
with the test leads connected in the other polarity. The low reading will be  
typically some three-digit number on the display (for example: .673). The  
actual number is not critical. The high reading should be infinity (1.).  
Battery life Alkaline: 200 hours typical  
Safety Goggles  
d. Connect the test leads to the circuit under test.  
Carbon zinc: 100 hours typical  
We recommend wearingsafety goggles whenwork-  
ingonyourcar,toprotectyoureyesfrombatteryacid,  
gasoline, and dust and dirt flying off moving engine  
parts.  
SMOKINGANDOPENFLAMES  
Never smoke while working on your car. Gasoline  
vapor is highly flammable, and the gas formed in a  
charging battery is explosive.  
e. Read the result on the digital display. If the display reads overrange  
(1.), switch to a higher range within the resistance function.  
Accessories – Test leads (pair), instruction manual  
NOTE: Never look directly into the carburetor throat  
while the engine is cranking or running, as sudden  
backfire can cause burns.  
FUNCTIONSANDDISPLAY:  
5.DIODECHECK  
BATTERY  
Do not lay tools or equipment on the  
battery. Accidentally grounding the “HOT”  
battery terminal can shock or burn you and  
damage wiring, the battery or your tools  
and testers. Be careful of contact with  
battery acid. It can burn holes in your  
clothing and burn your skin or eyes.  
Whenoperatinganytestinstrumentfromanauxiliary  
battery, connectajumperwirebetweenthenegative  
terminal of the auxiliary battery and ground on the  
vehicleundertest.Whenworkinginagarageorother  
enclosedarea, auxiliarybatteryshouldbelocatedat  
least 18 inches above the floor to minimize the  
possibility of igniting gasoline vapors  
The analyzer provides the following functions and displays them as  
indicated.  
a. Set the SELECTOR switch to the diode  
position.  
LOOSE CLOTHING AND LONG  
HAIR (MOVING PARTS)  
Be very careful not to get your hands, hair or clothes  
near any moving parts such as fan blades, belts and  
pulleys or throttle and transmission linkages. Never  
wear neckties or loose clothing when working on  
yourcar.  
PRECAUTIONSANDPREPARATIONFOR  
MEASUREMENT:  
b. Plug the BLACK test lead into the COMmon input jack on the  
multitester.  
OFF - To preserve battery life always return the rotary switch to OFF when  
testing is complete.  
1.Be sure that a fresh nine (9) volt battery is correctly installed in the  
multitester.  
c. Plug the RED test lead into the Volts (ohms) milliAmps input jack on  
the multitester.  
Accuracies are ± (% reading + No. of digits) at 23°C ± 5°C (75°F ± 3°F), less  
than 75% R.H.  
2.Compare the position of the selector switch with the anticipated test  
result. In the case of voltage or current measurement, always select a  
range which is high enough to handle the worst case result! Voltage or  
current may be higher than you expect.  
d. Connect the test leads to the diode under test. The diode must be  
removed from the circuit to achieve proper results.  
JEWELRY  
Never wear wrist watches, rings or other jewelry  
when working on your car. You’ll avoid the possibil-  
ity of catching on moving parts or causing an electri-  
cal short circuit which could shock or burn you.  
ACVolts  
e. Read the result on the digital display.  
f. Reverse the test lead connections at the diode.  
g. Read the result on the digital display.  
Accuracy  
(45Hz-450Hz)  
Overvoltage  
Protection  
3.The BLACK test lead is always inserted in the COMmon jack on the  
multitester. The RED test lead must be inserted in either the Volts  
(ohms) milliAmps jack, or the 10 Amps jack depending on the test  
being performed. Incorrect placement of the RED test lead may  
damage the multitester, the circuit under test, or both!  
Range  
200V  
Resolution  
100mV  
1V  
HIGH VOLTAGE  
VENTILATION  
High voltage – 30,000 to 50,000 volts – is present in  
the ignition coil, distributor cap, ignition wires and  
spark plugs. When handling ignition wires while the  
engine is running, use insulated pliers to avoid a  
shock. While not lethal, a shock may cause you to  
jerk involuntarily and hurt yourself.  
The carbon monoxide in exhaust gas is highly toxic.  
To avoid asphyxiation, always operate vehicle in a  
well-ventilatedarea. Ifvehicleisinanenclosedarea,  
exhaust should be routed directly to the outside via  
leakproof exhaust hose.  
DC 750V  
AC 750V  
± (1.2% rdg + 5 dgts)  
h. A good diode will show a low reading with the test leads connected  
one way, and infinity (1.) with the test leads connected the other  
way. The low reading will typically be some three-digit number on  
the display. The actual number is not critical.  
750V  
4.The 10 Amp range on the multitester is not fused. Exercise  
extreme caution!  
Input Impedance: 450K  
SETTINGTHEBRAKE  
MakesurethatyourcarisinParkor Neutral, andthat  
the parking brake is firmly set.  
JACK  
The jack supplied with the vehicle should be used  
only for changing wheels. Never crawl under car or  
run engine while vehicle is on a jack.  
5.Operate the multitester only in temperatures between 0°C and 50°C  
(32°F - 122°F), and at 80% or less relative humidity.  
FUSEREPLACEMENT:  
6.Turn the SELECTOR switch to the OFF position when testing is  
completed. If the multitester will not be used for an extended period of  
time, remove the internal nine (9) volt battery to avoid damage from  
leakage.  
DCVolts  
All milliamp ranges of this miltitester are fuse protected. Should you exceed  
2 amperes of current flow in any of these ranges, the fuse may open. To  
maintain safe operation of the multitester, replace it only with a 2 Amp, 250  
Volt, 5mm x 20mm fast-acting glass fuse. Replace the fuse as follows:  
VEHICLESERVICEINFORMATION  
Overvoltage  
AccuracyProtection  
Range  
Resolution  
The following is a list of publishers who have service manuals for your  
specific vehicle. Write or call them for availability and prices, specifying the  
make, style, model year and VIN (Vehicle Identification Number) of your  
vehicle.  
200mV  
100µV  
DC 500V  
AC 350V  
7.Do not store the multitester in direct sunlight, or in areas of high  
temperature or high humidity.  
1.Turn the SELECTOR switch OFF.  
2.Remove the bottom case half.  
3.Remove the battery.  
2000mV  
20V  
1mV  
10mV  
100mV  
1V  
± (0.75% rdg + 2 dgts)  
ORIGINAL EQUIPMENT MANUFACTURERS' VEHICLE SERVICE MANUALS  
DC 1100V  
AC 800V  
MEASUREMENT PROCEDURES:  
Cadillac, Chevrolet,  
Pontiac  
Helm Incorporated  
Post Office Box 07130  
Detroit, MI 48207  
Oldsmobile  
American Motors,  
Chrysler Corporation,  
Nissan, North America  
Dyment Distribution  
Services  
4.Using a small blade screwdriver or other suitable tool, gently pry the  
open fuse out of its holder.  
Lansing Lithographers  
Post Office Box 23188  
Lansing, MI 48909  
200V  
1.VOLTAGEMEASUREMENT  
5.Install a new fuse.  
1000V  
a. Set the SELECTOR switch to the required AC or DC voltage position.  
6.Re-install the battery, and bottom case half.  
b. Plug the BLACK test lead into the COMmon input jack on the  
multitester.  
Toyota Motor  
Corporation  
Toyota Service  
Publications  
750 W. Victoria St.  
Compton, CA 90220-5538  
CA residents:  
1-800-443-7656  
Outside CA:  
1-800-622-2033  
20770 Westwood Drive  
Strongsville, OH 44136  
(216) 572-0725  
Input Impedance: 10mΩ  
Ford Publications Dept.  
Helm Incorporated  
Post Office Box 07150  
Detroit, MI 48207  
c. Plug the RED test lead into the Volts (ohms) milliAmps input jack on  
the multitester.  
REPLACEMENTPARTS  
The following replacement parts are available for your multitester. Consult  
your retailer or the manufacturer for assistance.  
Buick  
Tuar Company  
Post Office Box 354  
Flint, MI 48501  
d. Connect the test leads to the circuit under test, observing proper  
polarity when measuring DC voltage.  
DCCurrent  
Honda Motor Co., Ltd.  
Helm Incorporated  
Post Office Box 07280  
Detroit, MI 48207  
Range  
Resolution  
Accuracy  
Voltage Burden  
e. Read the result on the digital display. If the display reads overrange  
(1.), switch to a higher range within the appropriate AC or DC function.  
200µA  
0.1µA  
1µA  
PARTNUMBER  
0002-2274  
DESCRIPTION  
Instruction Manual  
(313) 883-1430  
2000µA  
20mA  
250mV rms Max.  
2.DC MILLIAMP MEASUREMENT  
AFTERMARKET VEHICLE SERVICE MANUALS  
± (1.2% rdg + 2 dgts)  
0044-0108  
2 Amp 250 Volt Fuse  
Black Test Lead Assembly  
Red Test Lead Assembly  
a. Set the SELECTOR switch to the required DC milliamp position.  
10µA  
100µA  
1mA  
Motor’s Auto Repair  
Manual  
Hearst Company  
250 W. 55th Street  
New York, NY 10019  
Chilton Book Company  
Chilton Way  
Radnor, PA 19089  
Cordura Publications  
Mitchell Manuals, Inc.  
Post Office Box 26260  
San Diego, CA. 92126  
0038-1748  
b. Plug the BLACK test lead into the COMmon input jack on the  
multitester.  
200mA  
2000mA  
0038-1749  
± (1.5% rdg + 2 dgts) 700mV rms Max.  
c. Plug the RED test lead into the Volts (ohms) milliAmps input jack on  
the multitester.  
Overload protection: mA Input: 2A/250V fuse  

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