Measuring Ac Voltage Frequency - Radio Shack 22-812 Owner's Manual

2. To select the frequency function,
press until
SELECT
appears.
MHz
Otherwise, to select the duty
cycle or pulse width function,
repeatedly press
Hz/DUTY/WIDTH
å å å å
until appears (to select duty
cycle) or until µ µ µ µ S or mS appears
(to select pulse width)
3. If you are measuring frequency,
press if necessary to
RANGE
select manual range then repeat-
edly press until the range
RANGE
you want appears.
4. Connect the black test probe to a
ground reference for the signal,
and connect the red test probe to
the signal source.
Measuring AC Voltage
Frequency
The meter can measure the frequen-
cy of an AC voltage, with or without a
DC source bias.
Warning: To avoid electrical shock
and damage to the meter, never try to
measure a frequency of more than 1
kHz between AC 40 volts RMS and
750 volts RMS.
1. If you are measuring AC voltage
with a DC source bias, set the
function selector to
Otherwise, set the function selec-
° ° ° ° C/ ° ° ° ° F /
tor to .
V
Note: If the function selector is
set to and you want to
dBm / ~ V
set the meter for maximum sen-
, , or sitivity when measuring a new
Hz KHz
signal, press
the ACV function then press
DUTY/WIDTH
quency function.
2. To select the frequency function,
repeatedly press
until
3. If necessary, press
select
repeatedly press
desired range appears.
Note: To change back to ACV
measurement,
once
SELECT
play mode (dBm or volts).
4. To select the duty cycle or pulse
width function, repeatedly press
Hz/DUTY/WIDTH
(to select duty cycle) or until
mS
or
width).
å å å å , µ µ µ µ S, or mS appears and you
5. If
want to select the frequency
function again, repeatedly press
Hz/DUTY/WIDTH
MHz
6. Connect the test leads to the
device you want to check.
.
dBm / ~ V
Making Measurements
to select
SELECT
to select the fre-
Hz/DUTY/WIDTH
, , or appears.
Hz kHz MHz
RANGE
manual range,
until the
RANGE
press
SELECT
then repeatedly press
to select the ACV dis-
å å å å
until appears
appears (to select pulse
until ,
Hz kHz
appears.
Hz/
to
then
µ µ µ µ S
, or
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