Actron AutoAnalyzer CP7665 - Manual (Page 10)

10
7. View reading on display - Note
range setting for correct units.
NOTE: 2K
Ω
= 2,000
Ω
; 2M
Ω
=
2,000,000
Ω
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
10
Ω
.
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.
• D i s c o n n e c t i n g w i r e f r o m
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
µ
A position.
7. View reading on display.
If minus (-) sign appears on dis-
play, then reverse RED and
BLACK test leads.