Amprobe 33XR-A Professional-Digital-Multimeter - Manual (Page 9)

3
Introduction
The 33XR-A is a manual ranging handheld digital multimeter for measuring or
testing the following:
• DC and AC voltage • Temperature
• DC and AC current • Capacitance
• Resistance • Diodes
• Frequency • Continuity
Additional features include the following modes:
MIN MAX, HOLD, REL (relative), and Peak±
Making Measurements
Verify Instrument Operation
Before attempting to make a measurement, verify that the instrument is operational
and the battery is good. If the instrument is not operational, have it repaired before
attempting to make a measurement.
Correcting an Overload ( o) Indication W
An o indication may appear on the display to indicate that an overload condition
exists. For voltage and current measurements, an overload should be immediately
corrected by selecting a higher range. If the highest range setting does not
eliminate the overload, interrupt the measurement until the problem is identified
and eliminated. The
o indication is normal for some functions; for example,
resistance, continuity, and diode test.
Measuring DC Voltage See Figure -1-
1. Set the Range Switch to an appropriate v range.
Select the highest range and work down if the voltage level is unknown.
2. Connect the Test Leads: Red to E, Black to COM
3. Connect the Test Probes to the circuit test points.
4. Read the display, and, if necessary, fix any overload (o) conditions.
Measuring AC Voltage See Figure -2-
1. Set the Range Switch to an appropriate V range.
Select the highest range and work down if the voltage level is unknown.
2. Connect the Test Leads: Red to E, Black to COM
3. Connect the Test Probes to the circuit test points
4. Read the display, and, if necessary, fix 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 before you
select a current range.
• 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.