Operating Instructions; Test Lead Ac/Dc Voltage Measurements - Extech Instruments RC200 User Manual

Operating Instructions

WARNING: Risk of electrocution. High-voltage circuits, both AC and DC, are very
dangerous and should be measured with great care.
1. If "OL" appears in the display during a measurement, the value exceeds the range you
have selected. Change to a higher range.
2. The meter will automatically recognize if the voltage test leads or tweezers adaptor is
inserted.
3. The meter will turn on with autoranging "AUTO" selected. In this mode, the unit will
automatically select the proper range to measure the device under test. Press the
"RANGE" button to go to manual ("MANU") ranging. Continue pressing the button until
the range desired is selected. Press and hold the RANGE button for two seconds to
return to autoranging.
4. On some low AC and DC voltage ranges, with the test leads not connected to a device,
the display may show a random, changing reading. This is normal and is caused by the
high-input sensitivity. The reading will stabilize and give a proper measurement when
connected to a load.

Test Lead AC/DC Voltage Measurements

1. Insert the voltage adaptor into the meter observing the polarity indicators.
2. Press the MODE button for 2 seconds until the meter beeps. "V" will be displayed on the
LCD
3. Press the MODE button to select either AC or DC voltage.
4. Touch the black test probe tip to the negative side of the circuit.
Touch the red test probe tip to the positive side of the circuit.
5. Read the voltage in the display.
Note: The " " DANGER symbol will appear in the display whenever the measured voltage
exceeds 30V
WARNING: To avoid electric shock, disconnect power to the unit under test and
discharge all capacitors before taking any capacitance or resistance measurements.
Remove the batteries and unplug line cords.
Tweezer Resistance, Capacitance, Continuity and Diode Measurements.
1. Insert the tweezers adaptor into the meter observing the polarity indicators.
2. Press the MODE button for 2 seconds until the meter beeps. The meter turns on in the
SCAN mode and "- - - -" on the display.
3. Insert a component into the tweezers contacts. In the SCAN mode, the meter
automatically selects the proper range and units (Capacitance or Resistance).
4. Read the measurement results in the display.
5. Press the MODE button to exit the SCAN mode and begin resistance measurements.
The "Ω" icon will appear on the display.
6. Press the MODE button for continuity measurements. The
display. The meter will beep if the resistance is less than the continuity threshold.
7. Press the MODE button for diode measurements. The
display. A good diode will read "OL" in one direction and a low voltage in the opposite
direction.
8. Press the MODE button for capacitance measurements .The "F" icon will appear on the
display. It can take several minutes for the reading to stabilize at the final value for large
value capacitors.
9. Press the MODE button again to return to the SCAN mode.
icon will appear on the
4
icon will appear on the
RC200-EU-EN-V1.4-3/11