Radio Shack Marine Instruments manuale d’uso

Owner’s Manual Please read before using thi s equipm ent. Clamp-On AC Ammeter with Det achable M ultimete r[...]

2 Contents ˆ Contents Features ...... ................. ........... ................. ................. ........... ................. ........... 3 A Wor d About Safet y .................... ........... ................. ................. ........... ...... 4 Special Pa nel Markings ............... ........... ................. ................ ..[...]

3 Features ˆ Features Your RadioSh ack Clamp-O n AC Am- meter wit h Detac hable M ultimeter is design ed with a precisio n meter movem ent to avoi d mechan ical sho ck damage . You r port able, com pa ct m ul- timeter i s ideal for fi eld, la b, shop, bench, and ho me appli cations. The multim eter meas ures DC and AC cur- rent, DC an d AC voltage[...]

4 Features A WORD ABOUT SAFETY We have ta ken ev ery precau tion in design ing this m ultimete r to ensure that it is as s afe as w e can make it. But safe op eration depe nds on you , the operat or. We reco mmend tha t you fol low these s imple safe ty rule s: • Ne ver apply voltages to the mul - timeter tha t exceed the limits given i n “Spec[...]

5 Special Panel M arkings MEASURE CURRENT AND VOL T AG E IN COMMERCIAL ELECTRICAL P ANELS. UNLIKE A HOME AC OUTLET , A COM- MERCIAL ELECTRICAL P ANEL HAS TREMENDOUS CUR- RENT SURGE POTENTIAL. THIS IS ESPECI ALL Y TRUE FOR THREE-PHASE INDUS- TRIAL ELECTRICAL P ANELS. A SMALL SP ARK FROM O NE OF THESE P ANEL S CAN CAUSE A PLASMA EXPLOSION AND FIRE TH[...]

6 Specifications ˆ Specifications RANGES AC/DC V olta ge .................... ...... ...... ..... ...... ........... ...... ..... ...... ... 15V , 150V , 500V DC Current .................... ................. ................ ............ ................ ............. 150 m A AC Current .............. ........... ................. ...............[...]

7 A Quick Look at Your Multimeter ˆ A Quick Look at Y our Multimeter OHMS ADJU ST (le ft s ide o f AC AMMETER MUL TIMETER multimeter) Ω O H M S[...]

8 Preparation ˆ Preparation INSTALLING A BATTERY Your multi meter requires one AAA battery (not supp lied) f or power. Fo r the best p erforma nc e an d lo nge st life , we rec ommend a Radio Shack al ka- line ba ttery. Warn in gs: • T o avoid elec trical sho ck, disc on- nect bot h of the m ultimete r ’ s test leads fro m any equ ipmen t befo[...]

9 Preparation 4. Place the battery in the c ompart- ment as indicate d by the po larity symbol s (+ an d –) marke d insid e. 5. Repla ce the bac k cover an d the top cove r , then secure them with the screws. When you canno t a dj ust the nee dle to point to 0 on th e sca le w hen yo u mea - sure re sistance (see “M easuring Re- sistan ce” on[...]

10 Using the Multimeter 3. Use th e screw to se cure the ammete r to the multim eter , then put the top c over you rem oved in Step 1 in a safe pl ace. ZERO ADJUSTMENT If the n eedle does not normal ly rest exactl y over 0 on the left side of the ACVA/DCVA scale, us e a flat scre w- driver to a djust th e plastic screw on the cente r of the mu ltim[...]

11 Using the Multimeter MEASURING DC/AC V OLTAGE WARNINGS: • NEVER CLAM P A TEST LEAD TO A HOT WI RE (USUALL Y RED, BLACK, OR BLUE IN AC WIRING CIRCUITS). IF ONE LEAD IS CLAMPED TO A HOT WIRE AND YOU TOUCH THE MUL TIMETER’S OTHER PROBE, YOU COULD RECEIVE AN ELECTRIC SHOCK. • THE MAXIMUM INPUT LI MIT FOR VOL T AGE MEASURE- MENT I S 500V DC OR [...]

12 Using the Multimeter to 2, t he AC o r DC voltage is 100 vol ts (2 × 5 0 = 100V). • If th e functi on selec tor is set to 15 DCV , read the lower line of ACVA/DCVA on th e mul tim e- ter then mu ltiply the reading you se e by 5. Fo r example , if the need le points to 2, the DC voltage is 10 volts (2 × 5 = 10V) . • If th e functi on selec [...]

13 Using the Multimeter Measuring AC V oltage Riding on a DC Source Bias To mea sure A C volta ge supe rim- posed o n a DC voltage source bi as while ignoring the D C voltage , you must fir st measure the AC and DC voltage s sepa rately, the n compute the peak voltage using th is form ula: Peak vol tage = DC vo ltage + AC volt - age/0. 707 WARNINGS[...]

14 Using the Multimeter 1. Set the fun ction selec tor to 150 mA DC mA . 2. Remov e power from the circ uit under te st and discha rge all capac itor s. 3. Break the ele ctrical pat h for the circui t in which you wa nt to mea - sure c urrent. T hen con nect the – (commo n) test lead to the nega- tive s ide and th e positi ve (+) tes t lead to t [...]

15 Using the Multimeter 4. Hold d own the t rigger leve r on the amm eter . The amme ter ’s jaws open. Then inse rt the wire you ar e measurin g inside the probe 's jaws and rele ase t he trig- ger le ver. 5. Slide T/3A/15A/30A on the amme - ter to 3A , 15A , or 30A (to m easure current). Note: If y ou ar e not s ure abou t the curre nt leve[...]

16 Using the Multimeter MEASURING W ATTAGE You can use the m ultimeter a nd am- meter to tel l h ow man y watts of powe r an appl iance u se s. Thi s hel ps y ou de - termine what t he el ectricity costs are for that a ppliance . The fo llow ing for mul a can hel p you make th e neces sary conv ersion. V (volts ) × A (amps) = W (watts) To determ i[...]

17 Care • If the function se lector is set to R × × × × 1K Ω , multi ply that readi ng by 1000 t o compute th e resistan ce. For exa mple, i f the nee dle points to 1 , t he resist ance i s 1000 oh ms (1 × 1000 = 1000 Ω ). Hint: If you are ide ntifying cathode and anode e nds or th e type o f tran sis- tor (PNP or NP N), the actu al pola[...]

18 Care REPLACING THE FUSE If the multi meter do es not work, you might nee d to replace the fus e with the suppl ied 315 mA, 250V ceram ic fuse. The spare fu se is next to the battery c ompartment. Caution: Do not use a fuse wi th rat- ings oth er than those s pecified here. Doing so might d amage your mult im- eter . Follow these s teps to re pla[...]

19 Notes ˆ Notes[...]

22-602 01A01 Printed in China Radi oSha ck Cor p orat ion Fort W orth, Te xas 7 6102 Limited Ninety-Day W arranty This pro duct is warr anted by RadioSh ack against man ufactur ing defec ts in materia l and work- manshi p under norma l use for ninety (9 0) d ays from the date o f purcha se fr om Radi oShack com- pany-owne d stores and author ized R[...]