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5
Functions and Display Definitions
(Refer to Digital Multimeter illustration on facing page)
1. ROTARY SWITCH
Switch is rotated to turn multimeter ON/
OFF and select a function.
2. RPM X 10
This Function is used for measuring
engine speed (RPM).
3. DWELL
This Function is used for measuring
DWELL on distributor ignition systems,
and solenoids.
4. DIODE CHECK
This Function is used to check whether a
diode is good or bad.
5. TEST LEAD JACKS
BLACK Test Lead is always inserted in the
COM test lead jack.
RED Test Lead is always inserted in the
or
V
test lead jack.
Always connect TEST LEADS to the
multimeter before connecting them to
the circuit under test!!
6. OHMS
This Function is used for measuring the
resistance of a component in an electrical
circuit in the range of 0.1Ω to 20MΩ. (Ω is
the electrical symbol for Ohms)
7. DC VOLTS
This Function is used for measuring DC
(Direct Current) Voltages in the range of 0
to 200V.
8. AC VOLTS
This Function is used for measuring AC
(Alternating Current) Voltages in the range
of 0 to 750V.
9. DISPLAY
Used to display all measurements and
multimeter information.
Low Battery If LO BAT appears in the
upper left corner of the display, then
replace the internal 9V
battery. (see Battery
Replacement on page 7.)
Overrange Indication If 1
or -1 appears on the left
side of the display, then the
multimeter is set to a range
that is too small for the
present measurement being
taken. Increase the range
until this disappears. 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.