Amprobe BDM40-UA Bench-Digital-Multimeter - Manual (Page 6)

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AC and DC Current: Standard current measurements from 10 nA to 20 ADC and 10 µA to 20 AAC or
AC+DC true rms.
•
Resistance: Standard resistance measurements from 10 m Ω to 20 MΩ.
•
Each measurement range has: Autopolarity operation. Overrange indication. Effective protection from
overloads and transients. Dual slope integration measurement technique to insure fast, accurate,
noise-free measurements.
•
Diode test: Ranges of the resistance function that will turn on PN junctions allowing testing of diodes
and transistors. These ranges are marked with a diode symbol on the front panel of your DMM. The
preferred 2k
Ω range is marked with the largest diode symbol.
• Improved test leads: Finger guards on the probes and shrouded contacts on the input terminals decrease
the possibility of accidental contact with circuit voltage.
•
Long-term calibration accuracy: 1-year.
UNPACKING YOUR INSTRUMENT
The shipping box should contain this manual, your multimeter, test leads (one red and one black), two spare
fuses (2A); two spare fuses 0.08A (230V) and 0.125A (117V), and 2 power cords (1 - 115V and 1- 230V ). Check
the shipment for damage.
W CAUTION
This meter has dual operating voltages. It can be operated from 117VAC or 230VAC
source. The unit is shipped in the 230VAC configuration with an 0.08A / 250 V fuse
installed. If you plan to use the BDM40-UA on a 117 V source, unplug the power cord,
switch to the 0.125A / 250V fuse (supplied with instrument), and set the rear panel
switch to 117V.
If the meter maybe damaged if is not setup properly for the source voltage being used.
The label on the top side of your instrument is marked with the line voltage and
frequency required for proper operation. Refer to Maintenance section if a change in the
input power configuration is desired.
GETTING ACQUAINTED
Your meter is light-weight with a low profile, and requires little space on the work bench. The black case is made
of rugged, high-impact plastic. The handle can be rotated to eight positions. The right side of your DMM contains
two rows of switches and LED display. The power cord receptacle is located on the rear panel of your DMM. The
meter inputs are the 4 inputs on the front panel and are marked for the functions.
USING YOUR METER
The following paragraphs describe each of the controls on your DMM and how these controls can be used for
each instrument function. Exercises are included to help you familiarize yourself with your DMM and to verify that
your instrument is functional.
The LED Display
The high-contrast 4-1/2 digit LED display is easily read from across the room. It can register from 0000 to 19999
counts. For ease of discussion, the 19999 will be rounded to 20000 in the remainder of this text. For example, we
will refer to the 2V range, not the 1.9999V range. In all linear functions, the decimal point position is determined
by the range selected. Polarity of the input signal is indicated by a ‘ – ‘ sign at the center of the left side of the LED.
The + sign is disabled in the AC V, AC mA, and k
Ω measurement functions. The ‘ – ‘ sign may appear in any
measurement function, but is normally not meaningful when making AC V, AC mA, and k Ω measurements. You