3
which must be followed to ensure safe operation and retain the meter in safe condition.
Some common international electrical symbols used in this manual are shown below.
○
OFF(power)
SWITCH POSITION
DANGEROUS
VOLTAGE
ON(power)
SWITCH POSITION
EARTH GROUND
~
AC-ALTERNATING
CURRENT
WARNING INFORMATION
DC-DIRECT
CURRENT
Before using the meter, read the following safety information carefully.
z
Avoid working alone.
z
Follow all safety procedures for equipment being tested.
z
Inspect the test leads for damaged insulation or exposed metal. Check test lead continuity.
Damaged leads should be replaced.
z
Be sure the meter is in good operating condition.
z
Select the proper function for your measurement.
z
To avoid electrical shock, display “ ‘ when working above 30V dc or 30V ac RMS.
z
Disconnect the live test lead (V
Ω
) before disconnecting the common test lead (COM).
z
Disconnect the power and discharge high-voltage capacitors before testing in
Ω
, and .
z
When making a current measurement, turn the circuit power off before connecting the meter in
the circuit.
z
Check meter fuses before measuring transformer secondary or motor winding current; (See
Section 4, “MAINTENANCE”) An open fuse may allow high voltage build-up, which is potentially
hazardous.
Section 2
Getting Started
INTRODUCTION
Section 2 explains how to prepare the meter for operation, discusses general operating features, and
walks you through the basics of taking some common measurements,
GETTING STARTED
Unpacking and Inspecting the Meter
Carefully remove the meter from its shipping container and inspect it for possible damage or missing
items. If the meter is damaged or something is missing, contact the place of purchase immediately.
Save the container and packing material in case you have to return the meter.
Front Panel and Rear Panel
The front panel (shown in Figure 2-1) has three main elements: the input terminals on the right, the
display and the pushbuttons.
The pushbuttons are used to
select major functions, ranging
operations, and function
modifiers. These elements are
described in detail in Section 3.
DCV
ACV
FREQ
DCA
ACA
AUTO
MN
SHIFT
MX
HOLD
COMP
ON
1
POWER
OFF
0
ALL INPUTS
1KV MAX
FAST FUSE
500mA 250V
mA
10A FUSED
750V
1000V
MAX
RANGE
dBm
REL
RATE
DUAL DISPLAY MULTIMETER
8145B
