RS Pro RS-338 Manuel D'instructions page 5

Mini AC/DC Clamp/ English
located on the left side of the meter (top button). While data hold is active, the H display
icon appears on the LCD. Press the data hold button again to return to normal operation
MAX/MIN
To freeze the LCD meter reading, press the data hold button. The data hold button is
located on the left side of the meter (top button). While data hold is active, the H display
icon appears on the LCD. Press the data hold button again to return to normal operation
PEAK HOLD
The Peak Hold function captures the peak AC voltage or current. The meter can capture
negative or positive peaks as fast as 1 millisecond in duration.
• Turn the function switch to the A or V position.
• Use the MODE button to select AC. Allow time for the display to stabilize.
• Press the PEAK button, Pmax will display. The display will now update and indicate the
highest positive peak.
• Press the PEAK button again, Pmin will display. The display will now update and
indicate the lowest negative peak.
• Press the PEAK button again, a blinking "MAX MIN" will appear. The meter will display
the present reading, but will continue to update and store the max and min reading.
• Press and hold PEAK to return to normal operation.
4. Operation
NOTICES: Read and understand all warning and precaution statements listed in the
safety section of this operation manual prior to using this meter. Set the function
select switch to the OFF position when the meter is not in use.
4-1. AC/DC Current Measurements
WARNING: Ensure that the test leads are disconnected from the meter before making
current clamp measurements.
• Set the Function switch to the A, mA range.
• Select AC or DC with the MODE button.
• If the range of the measurment is not known, select the higher A range first then move
to the lower mA range if necessary.
• Press the trigger to open jaw.
Fully enclose the clamp over the conductor wire to be measured.
Only one wire can be measured each time.
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• In DCA measuring mode, to ensure
the reading is correct, please press REL
button to clear any residual reading on
the LCD before measurement.
This should be done before each
measurement.
The clamp meter LCD will display the
reading.
4-2. AC/DC Voltage Measurements
• Insert the black test lead into the negative COM terminal and the red test lead into the
positive V terminal.
• Set the function switch to the V position.
• Select AC or DC with the MODE button.
• Connect the test leads in parallel to the circuit under test.
• Read the voltage measurement on the LCD display.
4-3. Resistance Measurements
Note: never attempt an Ohm reading on a live circuit. All power to the circuit must be
turned off.
• Insert the black test lead into the negative COM terminal and the red test lead into the
positive terminal.
• Set the function switch to the Ω
• Touch the test probe tips across the circuit or component under Test. It is best to
disconnect one side of the device under test so the rest of the circuit will not interfere
with the resistance reading.
• For resistance measurements, read the resistance on the LCD display.
• For continuity measurements, press the mode button until the
• Follow the same instructions as above - for Continuity tests, if the resistance is
< 50Ω, a tone will sound.
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Mini AC/DC Clamp/ English
position.
appears.
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