IM CL235
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2.4 DC Voltage Measurement
WARNING
Do not make measurement on a circuit above 600VDC. This may cause
shock hazard or damage to the instrument or equipment under test.
Black test lead
Red test lead
(1) Set the Function Selector switch to the "
V " position. "DC" should be
shown on the upper left corner of the display.
(2) Plug the red test lead into the Hi terminal and the black test lead into Lo
terminal.
(3) Connect the tip of the red and black test leads to the positive (+) and
negative (-) sides of the circuit under test respectively. Take the reading
on the display.
2.5 AC Voltage Measurements
WARNING
Do not make measurement on a circuit above 600VAC. This may cause
shock hazard or damage to the instrument or equipment under test.
Black test lead
Red test lead
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IM CL235
(1) Set the Function Selector switch to the "
V" position. "AC" should be
shown on the upper left corner of the display.
(2) Plug the red test lead into Hi terminal and the black test lead into the Lo
terminal.
(3) Connect the tip of the red and black test leads to the circuit under test
and take the reading on the display.
NOTE
When the reading of input voltage is 3% of full scale or less in the circuit
under test or the frequency of voltage is low, symbol "LoHz" is indicated on
the display.
2.6 Resistance
Measurement
WARNING
Never use the instrument on an energized circuit.
Black test lead
Red test lead
(1) Set the Function Selector switch to the "
" position. The "
Ω
" should
be shown on the upper right corner of the display.
(2) Plug the red test lead into the Hi terminal and the black test lead into the
Lo terminal. Check that "OL" (over indication) is indicated on the LCD
display.
(3) With the tip of the test leads shorted together, press the
button to
offset the resistance of the test leads.
(4) Connect the tip of the test leads to the circuit under test and take the
reading on the display.
IM CL235
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2.7 Continuity Check (400
Ω
range fixed)
The continuity check mode is enabled by pressing the
button on resis-
tance range. "
" and "
Ω
" is indicated on the display to show the instrument
in the continuity check mode. The buzzer beeps, if the resistance under test is
20
Ω
or less.
WARNING
Never use the instrument on an energized circuit.
(1) Set the Function Selector switch to the "
" position.
(2) Plug the red test lead into the Hi terminal and the black test lead into the
Lo terminal. Check that "OL" (over indication) is indicated on the LCD
display.
(3) With the tip of the test leads shorted together, press the
button to
offset the resistance of the test leads.
(4) Press the
button once to enter from the normal mode to the conti-
nuity check mode. "
" should be indicated on the display.
(5) Connect the tip of the test leads to the circuit under test. If the resistance
is 20
Ω
or less, the buzzer beeps.
2.8 Frequency
Measurement
●
On ACA or ACV range, the frequency of the current or voltage under test
can be counted and shown on the display.
●
In the frequency measurement mode, "
" is indicated on the display.
●
Trigger threshold is 10% of full scale.
WARNING
●
Never use the instrument on a high voltage circuit above 600VAC. This
may cause electrical shock hazard and damage to the instrument or the
circuit under test.
●
Do not make current measurement with the test leads plugged into the
instrument.
(1) Set the Function Selector switch to the "
A" or "
V" position.
(2) Press the
three times to enter from the normal mode to the fre-
quency measurement mode. "
" should be indicated on the display.
(3) Follow instructions for ACA or ACV measurement and take the frequency
reading.
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IM CL235
2.9 Peak
Measurement
●
In the PEAK mode, the display shows current or voltage's crest in effec-
tive value. (For example, when the current or voltage is sinusoidal, the
reading equals the crest value divided by the square root of two.) The dis-
play reading is constantly updated with a maximum crest.
●
In this mode, "
" is indicated on the display.
●
Response time is 200ms in DC measurement and 500ms in AC meas-
urement.
WARNING
●
Never use the instrument on a circuit above 600V AC/DC. This may cause
electrical shock hazard and damage to the instrument or the circuit under
test.
●
Do not make measurement with the test leads plugged into the instrument.
(1) The PEAK mode is available on DCA, ACA, DCV and DCA ranges.
Set the Function Selector switch to the "
A", "
A", "
V" or "
V"
position.
Note: Only on DCA range, press the
button for about one second to
zero adjust the reading with the transformer jaws closed.
(2) Press the
button twice to enter from the normal mode to the PEAK
mode. "
" should be shown on the display.
(3) Follow instructions for DCA, ACA, DCV or ACV measurement.
(4) For accurate reading, press the
button to reset the reading after
clamping onto the conductor or making test lead connections to the circuit
under test. Then proceed to measurement.
AC
DC
Indication this value
Indication this value
NOTE
●
In AC measurement, reading are calibrated in RMS values.
●
In DC measurement, the Peak mode is available only for positive reading.
●
In the Peak measurement mode, measuring range is fixed at Hi.
