Actron CP7665 Operations Instructions download pdf (Page 10)

10

7. View reading on display - Note

range setting for correct units.

NOTE: 2KΩ = 2,000Ω; 2MΩ =

2,000,000Ω

If you want to make precise re-

sistance measurements, then

subtract the test lead resistance

found in Step 4 above from the

display reading in Step 7. It is a

good idea to do this for resis-

tance measurements less than

10Ω.

Measuring DC Current

This multimeter can be used to mea-

sure DC current in the range from 0 to

10A. Unlike voltage and resistance

measurements where the multimeter

is connected across the component

you are testing, current measure-

ments must be made with the multim-

eter in series with the component.

Isolating current drains and short cir-

cuits are some DC Current applica-

tions.

Fig. 10

Black

Red

Electrical

Device

DC

Voltage

Source

Fig. 11

Black

Red

Electrical

Device

DC

Voltage

Source

To measure DC Current (see Figs.

10 & 11):

1. Insert BLACK test lead into

COM test lead jack.

2. Insert RED test lead into "10A"

test lead jack or "mA" test lead

jack.

3. Disconnect or electrically

open circuit where you want

to measure current.

This is done by:

• Disconnecting wiring harness.

• Disconnecting wire from

screw-on type terminal.

• Unsolder lead from component

if working on printed circuit

boards.

• Cut wire if there is no other

possible way to open electri-

cal circuit.

4. Connect RED test lead to one

side of disconnected circuit.

5. Connect BLACK test lead to

remaining side of discon-

nected circuit.

6. Turn multimeter rotary switch

to 10A DC position, 200mA or

200

µA position.

7. View reading on display.

If minus (-) sign appears on dis-

play, then reverse RED and

BLACK test leads.

1 ... 9 10 11 ... 32

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