1
MASTER BKGRD 6-26-07
Taking Measurements
MASTER BKGRD 6-26-07
Measuring Frequency/Duty Cycle/Pulse Width
The meter can measure fre�uency from 10 Hz to 4 MHz and duty cycle and pulse
width with a signal fre�uency from 10 Hz to 100 kHz. The amplitude of the signal
should not be larger than 10V peak.
1. Rotate the function dial to
LOGIC/Hz
and press
SELECT
until
Hz
,
KHz
, or
MHz
appears.
Otherwise, press
Hz
/
DUTY
/
WIDTH
to select duty cycle function (
function (
%
appears)
or pulse width function (µ
pulse width function (µµ
S
or
mS
appears).
2. if you are measuring frequency, press
RANGE
if necessary to select manual
range then press
RANGE
until the range you want appears.
3. Connect the black test lead to a ground reference for the signal, and connect
the red test lead to the signal source.
Measuring AC Voltage/AC Current Frequency
The meter can measure the frequency of an AC �oltage, with or without a DC
source bias.
WARNING
: To a�oid electrical shock and damage to the meter, ne�er try to
measure a fre�uency of more than 1 kHz between AC 40 volts RMS and 750 volts
RMS.
1. if you are measuring AC �oltage with a DC source bias, set the function dial to
dBm / V
. Otherwise, set the function dial to
ºC/ºF
/
V
.
To measure AC current frequency, rotate the function dial to
rotate the function dial to /
µA/A
for
0.4/4mA and 4/10A ranges or /
mA/A
for 40/400mA and 4/10A ranges.
2. To select the frequency function, press
Hz
/
DUTY
/
WIDTH
until
Hz
,
kHz
, or
MHz
appears.
3. To select the duty cycle or pulse width function, press
Hz
/
DUTY
/
WIDTH
until
%
appears (to select duty cycle) or until
µS
or
mS
appears (to select pulse
width).
4. if
%, µS,
or
mS
appears and you want to select the frequency function again,
press
Hz
/
DUTY
/
WIDTH
until
Hz
,
kHz
, or
MHz
appears.
5. Connect the test leads to the de�ice you want to check.
Summary of Contents for 22-812A
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