© 2002 radioshack corporation. All rights reserved. Radioshack and radioshack.Com are trademarks used by radioshack corporation. Owner’s manual please read before using this equipment. # " +/2146#06 " # if an icon appears at the end of a paragraph, go to the box on that page with the corresponding i...
S yst em requirem ent s 2 your radioshack 46-range digital multimeter is a portable, compact, auto-ranging, digital multimeter. It is ideally suited for field, lab, shop, and home applications. The multimeter provides precise measurements and is built to provide the highest possible reliability. The...
A w o rd about s a fe ty 3 apply more than 1000v dc or 750v rms ac between the input jacks and ground. • use extreme caution when working with voltages above 100v. Always disconnect power from the circuit you are measuring before you connect test leads to high-voltage points. • never connect the tes...
4 a w o rd about s a fe ty 5 2'%+#. " 2 #0'. " / #4-+0)5 for your safety, we have added special markings to the meter’s panel to remind you of the measurement limitations. The maximum voltage that this meter can measure is 1000v dc or 750v ac. The maximum current that this terminal can measure is 40...
5 s pecif ic at ions 52'%+(+%#6+105 accuracies at 73.4 ° f (23 ° c) ± 5 ° , dc volts (maximum measurement: 1000v) 400mv ............................................... ± 0.3% of reading, ± 4 in last digit 4v to 40v ........................................... ± 0.3% of reading, ± 3 in last digit 400v...
6 s pecif ic at ions ac current (average responds, rms calibrated, 10a maximum, dc coupled) 400 µ a ................................................ ± 1.0% of reading, ± 5 in last digit 4ma ................................................... ± 0.8% of reading, ± 3 in last digit 40ma ...................
7 s pecif ic at ions the accuracy of these modes is determined by the exter- nal device and the accuracy of the dc volt mode. The temperature range of the newer 1mv per degree c probes are generally between –50 ° c and 1000 ° c. Frequency accuracy 400hz – 4k–40k–400khz–4mhz: ...........................
8 s pecif ic at ions logic mode min. High-level voltage: ............................... 2.0v ± 0.2v max. Low-level voltage: ............................... 1.0v ± 0.2v continuity beeper continuity (short) .................................... ≤ 50 ± 30 ohms open ........................................
9 a q u ic k look at your me te r # " 37+%- " .11- " #6 " ;174 " /'6'4 • • • • — measures ohms and capacitance. –––– / „ „ „ „ — checks continuity and diodes. / ma/a — measures current. / µµµµ a/a — measures current. Guard warning: the guard protects against electric shock. Do not remove it. H fe — ...
10 a q u ic k look at your met e r °°°° c/ °°°° f / v — displays temperature and measures dc volts. Off — turns the meter off. Max/min — lets you store maximum and minimum readings. Hz/duty/width — measures frequency, duty cycle, and pulse width. Rel € — lets you work with relative measurements. Ran...
Prep arat ion 11 24'2#4#6+10 + 056#..+0) " # " $ #66'4; your meter requires one 9-volt battery (not supplied) for power. For the best performance and longest life, we recommend a radioshack alkaline battery. " rý . . . . 1. If the rubber boot is attached to the meter, simply pull it off to remove it...
12 using t he met e r 400ma, plug the red test lead’s right-angled e n d i n t o +10a max i n s t e a d o f + v.Ma. Ω Ω Ω Ω . ± 7 5+0) " 6*' " 5 6#0& the stand on the back of the meter lets you place it upright on a flat surface for easier viewing. To use the stand, simply fold it out. 7 5+0) " 6*' ...
13 using t he met e r $ '(14' " ; 17 " 5 6#46 follow these steps to familiarize yourself with the meter’s operation before you use it for the first time. Rý . . . . 1. Rotate the function selector to select one of the following functions, then repeatedly press select to select the function you want....
14 using t he met e r to display 4001 or more units) or underflow (the meter tries to display 379 or fewer units). 3. To select manual range mode, press range . Disappears. Then repeatedly press range until the range you want appears. The decimal point shifts each time you press range . 4. Hold down...
15 using t he met e r 7. Connect the test leads to the circuit you want to measure. To measure different circuits, see “making measurements” on page 18. ±ý . . . . * 1.&+0) " # " / '#574'/'06 press hold to hold all indications on the display. Hold appears and the meter holds the measured value on th...
16 using t he met e r measures its own internal capacitance, which is normal). If you set the meter in relative mode with the small value as reference, it does not display this value when you measure a component. You can also set the meter to a baseline reference value. For example, if you are measu...
17 using t he met e r to turn the meter back on after it automatically turns off, press any button. 7 5+0) " 2 19'4 " . 1%- to set the meter so it does not turn off automatically, set the function selector to off to turn it off. Hold down hold and select at the same time, then turn on the meter. Fbe...
Ma king m easurem ent s 18 repeatedly press max/min to read the currently selected maximum value (if cwn cwn cwn cwn appears) or the currently selected minimum value (if c_d c_d c_d c_d appears). 5. To pause monitoring, press hold . Hold appears. To continue monitoring, press hold again. Hold disapp...
19 m a king m easur ement s & +52.#;+0) " 6 '/2'4#674' you can use an optional thermocouple module to measure temperature with your meter. The thermocouple module you use must output 1mv per measured ° c or ° f. The meter can display temperatures up to 999 ° c or 999 ° f. 1. Set the function selecto...
Ma king m easurem ent s 20 to set manual range control, press range then change the range (if necessary) by repeatedly pressing range . 4. Touch the probes to the circuit you want to test. / '#574+0) " #% " 8 1.6#)' " 4 +&+0) " 10 " # " &% " 5 174%' " $ +#5 to measure ac voltage superimposed on a dc...
21 m a king m easur ement s 2. Press select once to set the meter to measure ac current ( ∼∼∼∼ appears). Otherwise, repeatedly press select to set the meter to measure dc current ( ∼∼∼∼ disappears). 3. Remove the power from the circuit under test and discharge all capacitors. 4. Plug the black test ...
Ma king m easurem ent s 22 2. Rotate the function selector to • • • • . 3. If necessary, press select until Ω Ω Ω Ω , k Ω Ω Ω Ω , or m Ω Ω Ω Ω appears to set the meter to measure resistance. ± 4. Touch the test leads across the resistor you want to measure, or remove one of the leads of the componen...
23 m a king m easur ement s / '#574+0) " % #2#%+6#0%' the capacitance measuring circuit in your meter charges a connected capacitor to a specific voltage level, then discharges the capacitor to a lower voltage. The meter measures the amount of time takes to discharge the capacitor. . . . . Capacitan...
Ma king m easurem ent s 24 4. Touch the test leads across the circuit you want to measure. Shrt appears and the buzzer sounds if the circuit resistance is less than about 50 ohms (meaning the circuit is continuous or shorted). Open appears and the meter’s buzzer does not sound if the circuit resista...
25 m a king m easur ement s % *'%-+0) " & +1&' " 2 1.#4+6; many diodes have a stripe or mark on one side. The marked side of the diode indicates the diode’s cathode or negative (–) side. The other side is the anode or positive (+) side. If a diode is not marked, you can use your meter to check the d...
Ma king m easurem ent s 26 otherwise, to select the duty cycle or pulse width function, repeatedly press hz/duty/ width until å å å å appears (to select duty cycle) or until µµµµ iiii or ci ci ci ci appears (to select pulse width) 3. If you are measuring frequency, press range if necessary to select...
27 m a king m easur ement s / '#574+0) " #% " % 744'06 " ( 4'37'0%; 1. Rotate the function selector to / µµµµ a/a ýýýý for 0.4/4ma and 4/10a ranges or / ma/a for 40/ 400ma and 4/10a ranges. ± 2. To select the frequency function, press hz/ duty/width once. 3. If necessary, press range to select the m...
28 using the met e r w ith a comp ut er 75+0) " 6*' " /'6'4 " 9+6* " # " %1/276'4 you can connect your meter to a computer, letting you conveniently monitor and record and log data over a long period of time. You can even use your meter to display oscilloscope information on your computer! For examp...
Using t he met e r w it h a com put er 29 3. After you finish installing the software, restart your computer. 4. Connect one end of the supplied rs-232 cable to the jack on top of the meter, then connect the other end to your computer’s serial port. % 10(+)74+0) 1 7 5+0) " 6*' " / '6'4 " #0& " 5 1(6...
30 care and maint e nance %#4' " #0& " /#+06'0#0%' keep the meter dry; if it gets wet, wipe it dry immediately. Use and store the meter only in normal temperature environments. Handle the meter carefully; do not drop it. % .'#0+0) to keep the meter looking new, occasionally wipe it with a cloth slig...
31 care and maint e n ance plastic holder and insert it into the fuse holder through the loop of the attached ribbon. 6. Replace the back cover and secure it with the screws. 7. Reinstall the battery (see “installing a battery” on page 11), then replace the battery cover and secure it with the screw...
22-812 ao0069aca1 03a02 printed in china radioshack corporation fort worth, texas 76102 limited ninety-day warranty this product is warranted by radioshack against manufacturing de- fects in material and workmanship under normal use for ninety (90) days from the date of purchase from radioshack comp...
