Amprobe 38XR-A Professional-Digital-Multimeter User Manual

Page 10

Testing for Continuity

See Figure

-7-

1. Set the Function Switch to

2. If

is displayed, press the yellow button to display

3. Connect the Test Leads: Red to E, Black to COM
4. Turn off power to the circuit being measured.
5. Discharge any capacitors that may influence the reading.
6. Connect the Test Probes across the resistance.
7. Listen for the tone that indicates continuity (< 40

Ω).

Testing Diodes

See Figure

-8-

1. Set the Function Switch to

2. Connect the Test Leads: Red to E, Black to COM
3. Turn off power to the circuit being measured.
4. Free at least one end of the diode from the circuit.
5. Connect the Test Probes across the diode.
6. Read the display. A good diode has a forward voltage drop of about 0.6 V. An

open or reverse biased diode will read

Measuring Capacitance

See Figure

-9-

1. Set the Function Switch to the P function.
2. If RANGE is displayed, press the RANGE button to enable autoranging.
3. Connect the Test Leads: Red to COM, Black to

4. Turn off power to the circuit being measured.
5. Discharge the capacitor using a 100 k

Ω resistor.

6. Free at least one end of the capacitor from the circuit.
7. Connect the Test Probes across the capacitor. When measuring an electrolytic

capacitor match the test lead polarity to the polarity of the capacitor.

8. Read the display.

Measuring Temperature

See Figure

-10-

1. Set the function Switch to °C or °F.
2. Connect the K-type thermocouple to a TEMP adapter (XR-TA).

Match the polarity of the adapter to the polarity of the thermocouple.

3. Connect the TEMP adapter to the E and COM inputs.

Note: The 38XR-A is compatible with all K-type thermocouples. The K-type bead
thermocouple supplied with the meter is not intended for contact with liquids or electrical
circuits.

4. Expose the thermocouple to the temperature to be measured.
5. Read the display.