RadioShack 22-218 - Manual

9 Sensitivity AC Voltage .......................................................2000 ohm/Volt DC Voltage ......................................................2000 ohm/Volt Operating Temperature ......................... 32–109.4°F (0–43°C) Storage Temperature ......................... –4–140°F (–20...

10 SPECIAL PANEL MARKINGS We have added special markings to the panel to remind youof the meter’s measurement limitations and important safetyprecautions. Follow the operating instructions given in this owner’s manual. To avoid electric shock or damage to the meter, do not connect the ground termina...

12 INSTALLING A BATTERY Your meter uses one AA battery for power. We recommend analkaline battery, such as Radio Shack Cat. No. 23-552/557. WARNINGS: • TO AVOID ELECTRIC SHOCK, DISCONNECT BOTH TEST LEADS FROM ANY EQUIPMENT BEFORE YOUREMOVE THE BATTERY. • DO NOT OPERATE THE METER UNTIL YOU REPLACE TH...

15 REPLACING THE FUSE Your meter is protected by a 315 mA fuse. WARNINGS: • TO AVOID ELECTRIC SHOCK, DISCONNECT BOTH TEST LEADS FROM ANY EQUIPMENT BEFORE YOUREMOVE THE FUSE. • DO NOT OPERATE THE METER UNTIL YOU REPLACE THE FUSE AND CLOSE THE BACKCOVER. 22-218.fm Page 15 Friday, August 6, 1999 11:44 ...

18 OPERATION Cautions: • Use only the same type of test leads that are supplied with your meter. These test leads are rated for 1000volts. Replacements are available at your local RadioShack store. • When the meter is not in use, always leave thefunction selector set to OFF . 22-218.fm Page 18 Frida...

20 MAKING ACCURATE MEASUREMENTS For the most accurate reading, the temperature should be be-tween 43°F and 74°F (6°C and 23°C) with an 80% maximumrelative humidity. Keep the meter lying flat on a non-metallic surface. Also, usea range setting that results in a reading in the upper third of themeter ...

22 Zero Adjustment If the pointer does not normally rest exactly over 0 at the left side of the ACV/DC.VMA scale, adjust the plastic screw in the center of the tester face to bring the pointer to zero. MEASURING VOLTAGE WARNING: IF YOU ATTEMPT TO MEASURE A VOLTAGEGREATER THAN 1000 VOLTS DC OR AC, YO...

23 Measuring High Voltages When you measure voltage in a high-voltage circuit, do not tryto position both probes at once. Clamp one of the probes tothe circuit’s neutral or ground lead using a Radio Shack insu-lated slip-on alligator clip (Cat. No. 270-354). Then probe forvoltages with the other pro...

25 Measuring DC Voltage WARNING: IF YOU ATTEMPT TO MEASURE A VOLTAGEABOVE 1000 VOLTS DC, YOU MIGHT DAMAGE YOURMETER AND EXPOSE YOURSELF TO A SEVERE SHOCKHAZARD. 22-218.fm Page 25 Friday, August 6, 1999 11:44 AM

27 Measuring AC Voltage WARNING: IF YOU ATTEMPT TO MEASURE A VOLTAGEGREATER THAN 1000 VOLTS AC, YOU MIGHT DAMAGETHE METER AND EXPOSE YOURSELF TO A SEVERESHOCK HAZARD. 22-218.fm Page 27 Friday, August 6, 1999 11:44 AM

29 Measuring 3-Phase AC Voltage This meter is primarily designed to measure household ACvoltages and is not intended for commercial or industrial use.If you want to measure 3-phase, line-to-line voltages, pleasenote the following: • Because of the dangers inherent in the measurement of three-phase c...

31 Measuring AC Voltage on a DC Source Bias WARNING: NEVER MEASURE MORE THAN 30 VOLTS ACON A DC SOURCE BIAS. When an AC voltage has been superimposed on a DC sourcebias, you cannot take ordinary measurements. The readingswander on the scale and are not accurate. However, if you know the approximate ...

32 MEASURING DC CURRENT WARNING: NEVER CONNECT THE TEST LEADS TO ASOURCE OF UNKNOWN VOLTAGE WHEN YOU HAVE SETTHE FUNCTION SELECTOR TO THE 150 mA DC POSI-TION. 1. Set the function selector to 150 mA DC . 22-218.fm Page 32 Friday, August 6, 1999 11:44 AM

34 MEASURING RESISTANCE WARNINGS: • NEVER CONNECT THE TEST LEADS TO A SOURCE OF VOLTAGE WHEN YOU HAVE SET THE FUNCTIONSELECTOR TO THE Rx1K W POSITION. • BE SURE THAT THE CIRCUIT UNDER TEST HAS ALL POWER REMOVED AND THAT ANY ASSOCIATEDCAPACITORS ARE FULLY DISCHARGED BEFOREYOU MAKE A RESISTANCE MEASUR...

37 MAINTENANCE Your Radio Shack 8-Range Multitester is an example of supe-rior design and craftsmanship. The following suggestions willhelp you care for the meter so you can enjoy it for years. • Keep the meter dry. If it gets wet, wipe it dry immediately. Liquids might contain minerals that can cor...