Amprobe 30XR-A Professional-Digital-Multimeter - Manual (Page 8)

2
Symbols Used in this Manual
B Battery W Refer to the manual
T Double insulated X Dangerous Voltage
F Direct Current J Earth Ground
B Alternating Current R Audible tone
P Complies with EU directives
I Fuse
@ Underwriters
Laboratories, Inc
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
you attempting to make a measurement.
Correcting an Overload ( 0o) Indication W
An oor 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 L range.
Select the highest range and work down if the voltage level is unknown.
2. Connect the Test Leads: Red to V Ω G, 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 K range.
Select the highest range and work down if the voltage level is unknown.
2. Connect the Test Leads: Red to V Ω
G, 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 600 V.
• Always measure current in series with the load. Never measure current across
a voltage source.