Actron Digital Multitester CP7672 User Manual

e. Read the result on the digital display. If the display reads over-range (1), switch to a  
higher range within the resistance function.  
Resistance  
DESCRIPTION AND SPECIFICATIONS:  
CP7672 GENERAL PURPOSE DIGITAL MULTITESTER  
INSTRUCTION MANUAL  
Max. Open  
Circuit Voltage  
DESCRIPTION: This Digital Multitester is a compact, hand-held, easy to use instrument  
compatible both with home electrical applications, 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.  
Range  
200  
Resolution  
0.1Ω  
Accuracy  
5. DIODE CHECK  
a. Set the SELECTOR switch to the  
(diode) position.  
b. Plug the BLACK test lead into the COM input jack on the  
SAFETY GUIDELINES  
2000Ω  
20KΩ  
1Ω  
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 proce-  
SPECIFICATIONS:  
10Ω  
± (0.8% rdg + 2 dgts)  
± (1% rdg + 2 dgts)  
2.8V  
c. Plug the RED test lead into the V mA input jack on the multitester.  
Display – 3 1/2 digit, .5 inch LCD (Liquid Crystal Display)  
d. Connect the test leads to the diode under test. The diode must be removed from the  
circuit to achieve proper results.  
200KΩ  
2000KΩ  
100Ω  
1KΩ  
Automatic Polarity Sensing Display shows a minus (-) sign on the DC Volts and Amps  
functions when lead hookup is reversed.  
dures  
.
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.  
Zero adjustment Unit automatically zeroes on the volts and Amps functions.  
SAFETY EQUIPMENT  
to have the parking brake engaged when in the  
DRIVE position. Refer to your vehicle service  
manual for more information.  
Over range indication Left side of display shows either “1” or “-1” when range in a function  
is exceeded.  
Diode Check  
Use this test to check for open or shorted diodes.  
Fire Extinguisher  
Never work on your car without having a suitable  
fire extinguisher handy. A 5-lb or larger CO2 or dry  
chemical unit specified for gasoline/chemical/elec-  
trical fires is recommended.  
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.  
HOT SURFACES  
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.  
Transistor Check (hFE)  
Use this test to check for open or shorted transistors.  
Avoid contact with hot surfaces such as exhaust  
manifolds and pipes, mufflers (catalytic convert-  
ers), radiator and hoses. Never remove the radia-  
tor cap while the engine is hot, as escaping coolant  
under pressure may seriously burn you.  
Measurement rate 2.5 measurements per second, nominal  
Power – Nine (9) volt alkaline or carbon zinc battery, NEDA 1604  
Accessories – Test leads (pair), instruction manual  
Fireproof Container  
6. TRANSISTOR CHECK  
Rags and flammable liquids should be stored only  
in fireproof, closed metal containers. A gasoline-  
soaked rag should be allowed to dry thoroughly  
outdoors before being discarded.  
PRECAUTIONS AND PREPARATION FOR MEASUREMENT:  
a. Set the SELECTOR switch to the hFE position.  
SMOKING AND OPEN FLAMES  
Never smoke while working on your car. Gasoline  
vapor is highly flammable, and the gas formed in a  
charging battery is explosive.  
b. Determine whether the transistor is NPN or PNP type and locate the Emitter, Base,  
and Collector leads. Insert the leads into the proper holes of the hFE socket located  
on the front of the multitester.  
1. Be sure that a fresh nine (9) volt battery is correctly installed in the multitester.  
Safety Goggles  
FUNCTIONS AND DISPLAY:  
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.  
Werecommendwearingsafetygoggleswhenwork-  
ing on your car, to protect your eyes from battery  
acid, gasoline, and dust and dirt flying off moving  
engine parts.  
The analyzer provides the following functions and displays them as indicated.  
BATTERY  
c. The display will show an appropriate value of the transistor hFE measured under  
the following condition: base current = 10mA, collector-emitter voltage = 2.8V.  
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.  
OFF - To preserve battery life always return the rotary switch to OFF when  
testing is complete.  
3. The BLACK test lead is always inserted in the COM (common) jack on the multitester.  
The RED test lead must be inserted in either the V mA (Volt-ohm-milliAmp) jack or  
the 10ADC (Amperes DC) jack, depending on the test being performed. Incorrect  
placement of the RED test lead may damage the multitester, the circuit under  
test, or both!  
Accuracies are ± (% reading + No. of digits) at 23°C ± 5°C (75°F ± 9°F), less  
than 75% R.H.  
FUSE REPLACEMENT:  
NOTE: Never look directly into the carburetor  
throat while the engine is cranking or running, as  
sudden backfire can cause burns.  
All milliampere (mA) ranges of this multitester are fuse protected. Should the current exceed  
200 mA in any of these ranges, the fuse may open. To maintain safe operation of the  
multitester, replace it only with a 200 mA, 250 V, 5mm x 20mm fast-acting glass fuse. Replace  
the fuse as follows:  
When operating any test instrument from an auxil-  
iary battery, connect a jumper wire between the  
negativeterminaloftheauxiliarybatteryandground  
on the vehicle under test. When working in a  
garage or other enclosed area, auxiliary battery  
should be located at least 18 inches above the floor  
to minimize the possibility of igniting gasoline va-  
pors  
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 link-  
ages. Never wear neckties or loose clothing when  
working on your car.  
4. The 10 Amp range on the multitester is not fused. Exercise extreme caution!  
1. Turn the SELECTOR switch OFF.  
2. Remove the bottom case half.  
3. Remove the battery.  
5. Operate the multitester only in temperatures between 0°C and 50°C (32°F - 122°F),  
and at 80% or less relative humidity (RH).  
AC Volts  
Accuracy  
(45Hz-450Hz)Protection  
Overvoltage  
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.  
JEWELRY  
HIGH VOLTAGE  
Range  
200V  
Resolution  
100mV  
1V  
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.  
Never wear wrist watches, rings or other jewelry  
when working on your car. You’ll avoid the possi-  
bility of catching them on moving parts or causing  
an electrical short circuit which could shock or burn  
you.  
4. Using a small blade screwdriver or other suitable tool, gently pry the open fuse out of  
its holder.  
DC 1000V  
± (1.2% rdg + 10 dgts)  
7. Do not store the multitester in direct sunlight, or in areas of high temperature or high  
humidity.  
5. Install a new fuse.  
750V  
AC 750V  
6. Reinstall the battery, and bottom case half.  
VENTILATION  
JACK  
The carbon monoxide in exhaust gas is highly  
toxic. To avoid asphyxiation, always operate ve-  
hicle in a well-ventilated area. If vehicle is in an  
enclosed area, exhaust should be routed directly to  
the outside via leakproof exhaust hose.  
MEASUREMENT PROCEDURES:  
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.  
REPLACEMENT PARTS:  
The following replacement parts are available for your multitester. Consult your retailer or the  
manufacturer for assistance.  
DC Volts  
1. VOLTAGE MEASUREMENT  
Overvoltage  
Protection  
a. Set the SELECTOR switch to the ACV or DCV voltage position.  
b. Plug the BLACK test lead into the COM input jack on the multitester.  
c. Plug the RED test lead into the V mA input jack on the multitester.  
Range  
Resolution  
Accuracy  
SETTING THE BRAKE  
Make sure that your car is in Park or Neutral,  
and that the parking brake is firmly set.  
PART NUMBER  
0002-001-2387  
0044-000-0121  
0038-000-3256  
DESCRIPTION  
Instruction Manual  
200mV  
100µV  
DC 500V  
AC 220V  
± (0.25% rdg + 2 dgts)  
NOTE: Some vehicles have an automatic release  
on the parking brake when the gear shift lever is  
removed from the PARK position. This feature  
must be disabled when it is necessary (for testing)  
d. Connect the test leads to the circuit under test, observing proper polarity when  
measuring DC voltage.  
200 mA 250V Fuse  
Red/Black Test Lead Set  
2000mV  
20V  
1mV  
10mV  
100mV  
1V  
± (0.5% rdg + 2 dgts)  
e. Read the result on the digital display. If the display reads over-range (1), switch to a  
DC 1000V  
AC 750V  
higher range within the ACV or DCV function.  
200V  
2. DC MILLIAMP MEASUREMENT  
VEHICLE SERVICE INFORMATION  
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.  
a. Set the SELECTOR switch to the DCA current position.  
b. Plug the BLACK test lead into the COM input jack on the multitester.  
c. Plug the RED test lead into the V mA input jack on the multitester.  
d. Connect the test leads to the circuit under test, observing proper polarity.  
1000V  
DC Current  
ORIGINAL EQUIPMENT MANUFACTURERS' VEHICLE SERVICE MANUALS  
Voltage  
Burden  
e. Read the results on the digital display. If the display reads over-range (1), switch to  
Range  
Resolution  
Accuracy  
American Motors,  
Chrysler Corporation,  
Nissan, North America  
Dyment Distribution  
Services  
20770 Westwood Drive  
Strongsville, OH 44136  
(440) 572-0725  
Cadillac, Chevrolet,  
Pontiac  
Helm Incorporated  
Post Office Box 07130  
Detroit, MI 48207  
Oldsmobile  
a higher range within the DCA function.  
Lansing Lithographers  
Post Office Box 23188  
Lansing, MI 48909  
200µA  
0.1µA  
3. DC 10 AMPS MEASUREMENT  
2000µA  
20mA  
1µA  
10µA  
100µA  
± (1% rdg + 2 dgts)  
200mV  
Toyota Motor  
Corporation  
a. Set the SELECTOR switch to the 10 A current position.  
b. Plug the BLACK test lead into the COM input jack on the multitester.  
c. Plug the RED test lead into the 10ADC input jack on the multitester.  
d. Connect the test leads to the circuit under test, observing proper polarity.  
e. Read the result on the digital display.  
Ford Publications Dept.  
Helm Incorporated  
Post Office Box 07150  
Detroit, MI 48207  
Toyota Service Publications  
750 W. Victoria St.  
Compton, CA 90220-5538  
CA residents:  
200mA  
± (1.2% rdg + 2 dgts)  
Buick  
Tuar Company  
Post Office Box 354  
Flint, MI 48501  
Honda Motor Co., Ltd.  
Helm Incorporated  
Post Office Box 07280  
Detroit, MI 48207  
1-800-443-7656  
Overload protection: mA Input: 200mA/250V fuse  
Outside CA:  
1-800-622-2033  
4. RESISTANCE MEASUREMENT  
(313) 883-1430  
DC 10A  
a. Set the SELECTOR switch to the required resistance (ohms) position.  
b. Plug the BLACK test lead into the COM input jack on the multitester.  
c. Plug the RED test lead into the V mA input jack on the multitester.  
d. Connect the test leads to the circuit under test.  
Range  
Resolution  
Accuracy  
Voltage Burden  
AFTERMARKET VEHICLE SERVICE MANUALS  
Chilton Book Company Cordura Publications  
Motor’s Auto Repair  
Manual  
10A  
10mA  
± (2% rdg + 2 dgts)  
200mV  
ChiltonWay  
Radnor, PA19089  
MitchellManuals, Inc.  
Post Office Box 26260  
San Diego, CA. 92126  
Hearst Company  
250 W. 55th Street  
New York, NY 10019  
Overload protection: un-fused up to 10A for 15 seconds  
0002-001-2387  
15825 Industrial Parkway Cleveland, Ohio 44135  

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