Actron AutoTroubleShooter CP7677 - Manual (Page 5)

5
Functions and Display Definitions
1. ROTARY SWITCH
Switch is rotated to select a function.
2. DC VOLTS
This function is used for measuring DC
(Direct Current) Voltages in the range
of 0 to 1000V.
3. OHMS
This function is used for measuring the
resistance of a component in an elec-
trical circuit in the range of 0.1
Ω
to
20M
Ω
. (
Ω
is the electrical symbol for
Ohms)
4. DIODE CHECK / CONTINUITY TESTS
This function is used to check whether a
diode is good or bad. It is also used for
fast continuity checks of wires and ter-
minals. An audible tone will sound if a
wire and terminal are good.
5. HOLD
Press HOLD button to retain data on
display. In the hold mode, the "H" an-
nunciator is displayed.
6. TEST LEAD JACKS
BLACK Test Lead is al-
ways inserted in the COM
jack.
RED Test Lead is in-
serted in the jack corre-
sponding to the multim-
eter rotary switch setting.
8. DC AMPS
This function is used for measuring DC
(Direct Current) Amps in the range of 0
to 10A.
9. DWELL
This function is used for measuring
DWELL on distributor ignition systems,
and solenoids.
10. TACH
This function is used for measuring
engine speed (RPM).
11. ON/OFF
Press to turn power ON. Press again to
turn power OFF.
12. DISPLAY
Used to display all measurements and
multimeter information.
Low Battery – If this symbol appears
in the lower left corner of the display,
then replace the inter-
nal 9V battery. (See
Fuse and Battery re-
placement on page 7.)
Overrange Indication
– If “1” or “-1” appears
on the left side of the
display, then the multi-
meter is set to a range
that is too small for the
present measurement
being taken. Increase
the range until this dis-
appears. If it does not
disappear after all the ranges for a
particular function have been tried, then
the value being measured is too large
for the multimeter to measure. (See
Setting the Range on page 6.)
Zero Adjustment
The multimeter will automatically zero on
the Volts, Amps and RPM functions.
Automatic Polarity Sensing
The multimeter display will show a minus (-)
sign on the DC Volts and DC Amps functions
when test lead hook-up is reversed.
Always connect TEST LEADS to the mul-
timeter before connecting them to the
circuit under test!!
7. AC VOLTS
This function is used for measuring AC
Voltages in the range of 0 to 750V.
DC VOLTS
AC VOLTS
DIODES
CONTINUITY
RPM
DWELL
OHMS
DC AMPS