Digital Multimeter (220-0168) Features Faxback Doc. # 7950
with PC Interface
The Radio Shack LCD Digital Multimeter is a portable, 3 1/2 digit, compact
test instrument ideally suited for use in the field, lab, shop, and home.
Here are some of the professional features of the new digital meter.
Computer Interface and Software - includes both MS-DOS and Microsoft
Windows software to let you interface
the meter with your PC-compatible
computer to log and graph
measurements.
Memory Recording - stores ten measurements which you can
download to a computer.
Frequency Check Function - measures frequencies up to 20 MHz.
Transistor-Check Function - measures the capacitance of low-
voltage capacitors.
Dual-Measurement Function - shows both the AC voltage and
frequency for AC measurements or the
logic level and ripple frequency
for logic measurements.
Analog Bargraph Display - indicates the magnitude of the input
compared to the full-scale value of
the measurement range.
MAX/MIN Hold Function - displays the maximum or minimum
measured value on the secondary
display.
Data Hold Function - freezes the secondary display so you
can keep the measured value there
even after you disconnect the probes.
Relative Offset - stores a value in memory and displays
the difference between the stored
value and subsequent readings.
Continuity Function - makes it easy to check fuses, alarm
wiring, cables, and connections.
Auto-Polarity Operation - protects your meter and gives valid
measurements when you connect the
leads in reverse polarity.
Diode-Check Function - safely checks semi-conductor junctions
for open, short, or normal.
Combined (Function and Range) - makes the meter easy to use.
Selector Switch
Latest IC and Display Technology - ensures reliability, accuracy,
stability, and ease of operation.
Auto Power Shut-Off - turns off after 20 minutes of non-use
to help conserve battery power.
Beeper - sounds tones for overload warning,
continuity function, and range
selection.
Logic Test Function - checks logic levels without extra
logic probes
Overload and Transient Protection - helps protect the meter from
accidental overload on most ranges.
Low-Battery Indicator - appears when you need to replace the
batteries.
UL Listed - passes the stringent tests required by
Underwriters Laboratories for safety.
Cautions: Completely read this manual before you use the meter.
If you are not familiar with meters and testing procedures, we
suggest you read "Using Your Meter" (Radio Shack
Cat. No. 62-2039).
A WORD ABOUT SAFETY
This meter has been manufactured and tested in accordance with IEC 348 and
DIN57411/VDE 0411 Part 1 : Safety Requirements for Electronic Measuring
Apparatus, Safety Class II.
We have taken every precaution in designing and manufacturing this meter
to ensure that it is as safe as we can make it. But safe operation
depends on you, the operator. We recommend that you follow these simple
safety rules.
Never apply voltages to the meter that exceed the limits given in the
specifications. Never apply more than 1000 V DC or 750 V AC between
any terminals or between any input jack and ground.
Use extreme caution when working with voltages above 30 V AC or
60 V DC. Always disconnect power from the circuit you are measuring
before you connect the test probes to high-voltage points.
Never connect the test probes to a source of voltage when you select
diode, resistance, continuity, current measurement, capacitance, or
hFE functions.
Always turn off the meter's power and disconnect the test probes
before you replace the battery or fuse.
Never operate the meter unless the back cover is in place and fully
closed.
Because some AC/DC sets have a hot chassis, be sure the top of your
work bench and the floor underneath it are made of nonconductive
materials.
The meter is fully calibrated and tested. Under normal use, no further
adjustment should be necessary. If the meter should require repair, do
not try to adjust it yourself. Take it to your local Radio Shack store.
Service by unauthorized personnel voids the warranty.
WARNING: USE EXTREME CAUTION IN THE USE OF THIS DEVICE. IMPROPER USE OF
THIS DEVICE CAN RESULT IN INJURY OR DEATH. FOLLOW ALL
SAFEGUARDS SUGGESTED IN THIS OWNER'S MANUAL IN ADDITION TO
NORMAL SAFETY PRECAUTIONS IN DEALING WITH ELECTRICAL CIRCUITS.
DO NOT USE THIS DEVICE IF YOU ARE UNFAMILIAR WITH ELECTRICAL
CIRCUITS AND TESTING PROCEDURES.
NOT FOR COMMERCIAL OR INDUSTRIAL USE.
(br/all-11/30/94)
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