Radio Shack Marine Instruments owner manual Word about Safety

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A WORD ABOUT

SAFETY

We have taken every precaution in designing this multimeter 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 mul- timeter that exceed the limits given in “Specifications” on Page 6. Never apply more than 500V DC or 500V RMS AC between any input terminals or between an input terminal and ground.

Use extreme caution when work- ing with voltages above 40V. Always disconnect power from the circuit you are measuring before you connect test leads to high-voltage points.

Never connect the test leads to a

source of voltage when the func- tion selector is set to R1KΩ,

R100Ω, 150mA DC mA, or ACA.

Always discharge any capacitors of the circuit under test before you attach test leads.

Always turn off power and dis- connect the test leads from the circuit you are testing before you replace the multimeter’s battery.

Never operate the multimeter unless its battery compartment

cover is in place and fully closed with the screw fully tightened.

Because many AC/DC sets have a potentially hot chassis, be sure the top of your workbench and the floor underneath it are made of non-conductive materials.

This multimeter is fully calibrated and tested. Under normal use, no further adjustment should be necessary ex- cept as noted in this Owner’s Manual. If the multimeter requires repair, do not try to adjust it yourself. Take it to your local RadioShack store.

WARNINGS:

USE EXTREME CAUTION IN THE USE OF THIS DEVICE. IMPROPER USE OF THIS DEVICE CAN RESULT IN INJURY OR DEATH. FOLLOW ALL SAFEGUARDS SUG- GESTED IN THIS OWNER’S MANUAL IN ADDITION TO NORMAL SAFETY PRECAU- TIONS IN DEALING WITH ELECTRICAL CIRCUITS. DO NOT USE THIS DEVICE IF YOU ARE UNFAMILIAR WITH ELEC- TRICAL CIRCUITS AND TEST- ING PROCEDURES.

NEVER TRY TO PROBE WITH BOTH TEST LEADS AT THE SAME TIME OR HOLD BOTH TEST LEADS IN ONE HAND.

USE EXTREME CARE WHILE USING THE MULTIMETER TO

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Features

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Contents Clamp-On AC Ammeter Contents Features Detachable Clamp-On AC AmmeterWord about Safety Special Panel Markings 500V RMS MAXSpecifications RangesAccuracy MiscellaneousQuick Look at Your Multimeter Installing a Battery PreparationConnecting the Test Leads Connecting the AC Ammeter to the MultimeterZero Adjustment Using the MultimeterMaking Measurements Measuring DC/AC Voltage Measuring Three-Phase AC Voltage Measuring Current Measuring AC Voltage Riding on a DC Source BiasMeasuring AC Current in a Wire Ohms Measuring Wattage Measuring ResistanceCleaning CareReplacing the Fuse Page RadioShack Corporation Fort Worth, Texas