Actron CP7672 User Manual
CP7672 GENERAL PURPOSE DIGITAL MULTITESTER
INSTRUCTION MANUAL
SAFETY GUIDELINES
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
.
SAFETY EQUIPMENT
Fire Extinguisher
Never work on your car without having a suitable
fire extinguisher handy. A 5-lb or larger CO
chemical unit specified for gasoline/chemical/electrical fires is recommended.
Fireproof Container
Rags and flammable liquids should be stored only
in fireproof, closed metal containers. A gasolinesoaked rag should be allowed to dry thoroughly
outdoors before being discarded.
Safety Goggles
We recommend wearing safety goggles when working on your car, to protect your eyes from battery
acid, gasoline, and dust and dirt flying off moving
engine parts.
NOTE: Never look directly into the carburetor
throat while the engine is cranking or running, as
sudden backfire can cause burns.
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 your car.
JEWELRY
Never wear wrist watches, rings or other jewelry
when working on your car. Youll avoid the possibility of catching them on moving parts or causing
an electrical short circuit which could shock or burn
you.
VENTILATION
The carbon monoxide in exhaust gas is highly
toxic. To avoid asphyxiation, always operate vehicle in a well-ventilated area. If vehicle is in an
enclosed area, exhaust should be routed directly to
the outside via leakproof exhaust hose.
SETTING THE BRAKE
Make sure that your car is in Park or Neutral,
and that the parking brake is firmly set.
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)
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.
ORIGINAL EQUIPMENT MANUFACTURERS' VEHICLE SERVICE MANUALS
American Motors,
Chrysler Corporation,
Nissan, North America
Dyment Distribution
Services
20770 Westwood Drive
Strongsville, OH 44136
(440) 572-0725
Buick
Tuar Company
Post Office Box 354
Flint, MI 48501
AFTERMARKET VEHICLE SERVICE MANUALS
Chilton Book Company
Chilton Way
Radnor, PA 19089
Cadillac, Chevrolet,
Pontiac
Helm Incorporated
Post Office Box 07130
Detroit, MI 48207
Ford Publications Dept.
Helm Incorporated
Post Office Box 07150
Detroit, MI 48207
Honda Motor Co., Ltd.
Helm Incorporated
Post Office Box 07280
Detroit, MI 48207
(313) 883-1430
Cordura Publications
Mitchell Manuals, Inc.
Post Office Box 26260
San Diego, CA. 92126
or dry
2
to have the parking brake engaged when in the
DRIVE position. Refer to your vehicle service
manual for more information.
HOT SURFACES
Avoid contact with hot surfaces such as exhaust
manifolds and pipes, mufflers (catalytic converters), radiator and hoses. Never remove the radiator cap while the engine is hot, as escaping coolant
under pressure may seriously burn you.
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.
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.
When operating any test instrument from an auxiliary battery, connect a jumper wire between the
negative terminal of the auxiliary battery and ground
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 vapors
HIGH VOLTAGE
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.
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.
Oldsmobile
Lansing Lithographers
Post Office Box 23188
Lansing, MI 48909
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
Motors Auto Repair
Manual
Hearst Company
250 W. 55th Street
New York, NY 10019
DESCRIPTION AND SPECIFICATIONS:
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.
SPECIFICATIONS:
Display 3 1/2 digit, .5 inch LCD (Liquid Crystal Display)
Automatic Polarity Sensing Display shows a minus (-) sign on the DC Volts and Amps
functions when lead hookup is reversed.
Zero adjustment Unit automatically zeroes on the volts and Amps functions.
Over range indication Left side of display shows either 1 or -1 when range in a function
is exceeded.
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.
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
FUNCTIONS AND DISPLAY:
The analyzer provides the following functions and displays them as indicated.
OFF - To preserve battery life always return the rotary switch to OFF when
testing is complete.
Accuracies are ± (% reading + No. of digits) at 23°C ± 5°C (75°F ± 9°F), less
than 75% R.H.
AC Volts
Range Resolution (45Hz-450Hz) Protection
200V 100mV DC 1000V
750V 1V AC 750V
Accuracy Overvoltage
± (1.2% rdg + 10 dgts)
DC Volts
Range Resolution Accuracy Protection
200mV 100µV DC 500V
2000mV 1mV
± (0.25% rdg + 2 dgts)
± (0.5% rdg + 2 dgts)
20V 10mV DC 1000V
200V 100mV AC 750V
1000V 1V
Overvoltage
AC 220V
DC Current
Range Resolution Accuracy Burden
200µA 0.1µA
2000µA 1µA ± (1% rdg + 2 dgts) 200mV
20mA 10µA
200mA 100µA ± (1.2% rdg + 2 dgts)
Overload protection: mA Input: 200mA/250V fuse
Voltage
DC 10A
Range Resolution Accuracy Voltage Burden
10A 10mA ± (2% rdg + 2 dgts) 200mV
Overload protection: un-fused up to 10A for 15 seconds
Resistance
Range Resolution Accuracy Circuit Voltage
200Ω 0.1Ω
2000Ω 1Ω
20KΩ 10Ω ± (0.8% rdg + 2 dgts) 2.8V
200KΩ 100Ω
2000KΩ 1KΩ ± (1% rdg + 2 dgts)
Max. Open
Diode Check
Use this test to check for open or shorted diodes.
Transistor Check (hFE)
Use this test to check for open or shorted transistors.
PRECAUTIONS AND PREPARATION FOR MEASUREMENT:
1. Be sure that a fresh nine (9) volt battery is correctly installed in the multitester.
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.
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 VWmA(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!
4. The 10 Amp range on the multitester is not fused. Exercise extreme caution!
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).
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.
7. Do not store the multitester in direct sunlight, or in areas of high temperature or high
humidity.
MEASUREMENT PROCEDURES:
1. VOLTAGE MEASUREMENT
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 VWmA input jack on the multitester.
d. Connect the test leads to the circuit under test, observing proper polarity when
measuring DC voltage.
e. Read the result on the digital display. If the display reads over-range (1), switch to a
higher range within the ACV or DCV function.
2. DC MILLIAMP MEASUREMENT
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 VWmA input jack on the multitester.
d. Connect the test leads to the circuit under test, observing proper polarity.
e. Read the results on the digital display. If the display reads over-range (1), switch to
a higher range within the DCA function.
3. DC 10 AMPS MEASUREMENT
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.
4. RESISTANCE MEASUREMENT
a. Set the SELECTOR switch to the required resistance
b. Plug the BLACK test lead into the COM input jack on the multitester.
c. Plug the RED test lead into the VWmAinput jack on the multitester.
d. Connect the test leads to the circuit under test.
W
(ohms) position.
e. Read the result on the digital display. If the display reads over-range (1), switch to a
higher range within the resistance function.
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
multitester.
c. Plug the RED test lead into the VWmA input jack on the multitester.
d. Connect the test leads to the diode under test. The diode must be removed from the
circuit to achieve proper results.
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.
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.
6. TRANSISTOR CHECK
a. Set the SELECTOR switch to the hFE position.
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.
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.
FUSE REPLACEMENT:
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, 250V, 5mm x 20mm fast-acting glass fuse. Replace
the fuse as follows:
1. Turn the SELECTOR switch OFF.
2. Remove the bottom case half.
3. Remove the battery.
4. Using a small blade screwdriver or other suitable tool, gently pry the open fuse out of
its holder.
5. Install a new fuse.
6. Reinstall the battery, and bottom case half.
REPLACEMENT PARTS:
The following replacement parts are available for your multitester. Consult your retailer or the
manufacturer for assistance.
PART NUMBER DESCRIPTION
0002-001-2387 Instruction Manual
0044-000-0121 200 mA 250V Fuse
0038-000-3256 Red/Black Test Lead Set
0002-001-2387 15825 Industrial Parkway Cleveland, Ohio 44135
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