Amprobe 38XR-A Professional-Digital-Multimeter - Manual (Page 8)

4
Measuring DC Voltage See Figure -1-
1. Set the Function Switch to v.
2. If RANGE is displayed, press the RANGE button to enable autoranging.
3. Connect the Test Leads: Red to E, Black to COM
4. Connect the Test Probes to the circuit test points.
5. Read the display, and, if necessary, correct any overload (o) conditions.
Measuring AC + DC Voltage (True rms)See Figure -2- & -3-
See Additional Features to find out the advantages of true rms.
1. Set the Function Switch to v.
2. If DC is displayed, press the yellow button to turn on AC+DC.
3. If RANGE is displayed, press the RANGE button to enable autoranging.
4. Connect the Test Leads: Red to E, Black to COM
5. Connect the Test Probes to the circuit test points.
6. Read the display, and, if necessary, correct any overload (o) conditions.
Measuring AC Voltage (True rms) See Figure -2- & -3-
See Additional Features to find out the advantages of true rms.
1. Set the Function Switch to V.
2. If dBm is displayed, press the yellow button to turn on AC.
3. If RANGE is displayed, press the RANGE button to enable autoranging.
4. Connect the Test Leads: Red to E, Black to COM
5. Connect the Test Probes to the circuit test points.
6. Read the display, and, if necessary, correct any overload (o) conditions.
Preparing for Current Measurements
• Turn off circuit power before connecting the Test Probes.
• Allow the meter to cool between measurements, if current measurements
approach or exceeds 10 amps.
• A warning tone sounds if you connect a test lead to a current input while a
current function is not selected.
• Open circuit voltage at the measurement point must not exceed 1000 V.
• Always measure current in series with the load. Never measure current across a
voltage source.