Actron AutoTroubleShooter CP7677 - Manual (Page 7)

7
Fig. 4
Fig. 5
value of
3.87K
Ω
. The
actual value of
resistance is
3.87K
Ω
and not
4K
Ω
that was
measured in
the 200K
Ω
range. This is
very important
because if the
manufacturer
specifications
say that the
sensor should
read 3.8-3.9K
Ω
at 70
°
F then on
the 200K
Ω
range the sensor would be defective, but
at the 20K
Ω
range it would test good.
Now set the multimeter to the 2K
Ω
range.
(See Fig. 6) The
display will indi-
cate an
overrange con-
dition because
3.87K
Ω
is larger
than 2K
Ω
.
This example
shows that by
decreasing the
range you in-
crease the ac-
curacy of your
measurement.
When you
change the
range, you
change the lo-
cation of the decimal point. This changes
Fig. 6
the accuracy of the measurement by ei-
ther increasing or decreasing the number
of digits after the decimal point.
Battery and Fuse
Replacement
Important: A 9 Volt battery must be in-
stalled before using the digital multim-
eter. (see procedure below for installa-
tion)
Battery Replacement
1. Turn multimeter OFF.
2. Remove test leads from
multimeter.
3. Remove screw from battery
cover.
4. Remove battery cover.
5. Install a new 9 Volt battery.
6. Re-assemble multimeter.
Fuse Replacement
1. Turn multimeter OFF.
2. Remove test leads from
multimeter.
3. Remove rubber holster.
4. Remove screw from battery
cover, battery cover, and battery.
5. Remove screws from back of
multimeter.
6. Remove back cover.
7. Remove fuse.
8. Replace fuse with same size and
type as originally installed.
Use a 1/4" x 1-1/4", 10A, 250V, fast
acting fuse or a 5mm x 20mm
315mA, 250V fast acting fuse.
9. Re-assemble multimeter.