Radio Shack 22-174A Owner'S Manual Download | Manualshive

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Summary of Contents for 22-174A

Page 1: ...Cat No 22 174A OWNER S MANUAL Please read before using this equipment Radpfhaek...

Page 2: ...on quickly checks the continuity of wires or traces True RMS Operation gives a more accurate reading for non sine wave AC measurements Effective Overload and Translent Protectlon covers all ranges exc...

Page 3: ...tages to the meter that exceed the limits Jffi ffi3 3 il Jff lRy ii n X5 l 3fj apply more than 500V DC or 500V Ril ts A C dtu i input terminal and ground o Use extreme caution when you work with volta...

Page 4: ...sine wave Most meters uS oVOr ageresponding AC converters These meters are calibrated with pure sine waves lf you measure a sine wave that does not have harmonic distortion the m eter gives an accura...

Page 5: ...Maximum Readinq Resolution Accuracy 1000 v 1V 20 V t 2 Dioits 399 9 V 100 mV 1o o 2 Dioits 39 99 V 10 mV 1o o t2Dioits 3 999 V 1mV t1o o t2Dioits 399 9 mV 100 uV t1 50 o t 2 Dioits Allowable Crest Fac...

Page 6: ...ange Allowable Crest Factor Range 1 1 to 3 1 at FullScale 10 Ranges Maximum Readinql Resolution Accuracy 19 9 MO r0 ko t2 5o o 3 Dioits 3 999 Mc lko X1o o X 3 Dioits 399 9 ko 100 c X1o o t3 Dioits 39...

Page 7: ...olts Approx 12 GENE RAL SPECIFICATIONS Temperature Function Total Range Sg to 302 F S0 to 150 C 32o lo 212 F 0 to 100 C Accuracy I 3 6 F 2 C Repeatability Per Probe 1 8 F 1 C Sensor Type Thermistor Su...

Page 8: ...stall the batteries as indicated by the polarity marks and and illuskation inside the battery compartment 4 Replace the compartmenl cover INSTALLING BATTERIES We have placed the following special mark...

Page 9: ...ranges o Be sure you always select the correct function before you attach the test leads to the circuit to be measured You can blow one or more fuses if you rotate the function control while there is...

Page 10: ...u use a high quality capacitor to block the DC component For normal AC line frequencies we suggest you use a 47 pF or larger capacitor MEASURING DC VOLTAGE WARNING DO NOT TRY TO MEASURE A VOLTAGE GREA...

Page 11: ...the hand WARNING lF YOU CLAMP ON TO A HOT WIRE AND TOUCH A CONNECTED TEST PROBES AT THE SAME YOU COULD RECEIVE AN ELECTRIC SHOCK MEASURING AN AC VOLTAGE ON A DC BIAS This meter contains a DG blocking...

Page 12: ...the circuit and ground the possible line to line voltage is 800 volts 462 Volts x 1 732 800 Volts This voltage exceeds the meter s range and you should not connect the meter to the circuit or to any...

Page 13: ...ge indication or 0 il it blows a fuse while measuring current lf the meter displays the overrange indication wnen ou measure AC current and the circuit does not exceed the AC current in the present ra...

Page 14: ...e meter has a fuse and a special circuit that protects the lesisJance ranges from over voltage voltages greater than 5 volts lf you blow the meter s fuse the meter does not op erate correctly in the o...

Page 15: ...easurement Ghecking Gontinuity Your meter has a built in audible continuity function Follow these steps to check a circuit s continuity Notes lf the circuit s resistance is less than or equal to 50 oh...

Page 16: ...t age 2 45 volts appears as 25 on the bargraph lf the display shows a low voltage reading the red test probe is allhe anode of the diode and the black probe is at lhe cathode banded side of the diode...

Page 17: ...ndication that the transistor is operating The true gain of a transistor depends on its operating cur rent This meter applies 500 to 1000 pA to the emitter and collector and measures the base current...

Page 18: ...e beta This can make your meter display an inconect transistor type and pinout To be sure you have the correct pinout and transistor gpe check all transistors twice once with the transistor s flat sid...

Page 19: ...encies takes several seconds the keypad might be slow to respond to key presses o Measuring frequencies above 100 kHz might cause BATT to appear on the display lf this happens switch the meter to anot...

Page 20: ...ng and allow the meter to resume normal operation press DATA HOLD again ooo ol AUTO L RnHGE selecr j USING THE BAR GRAPH ln addition to the numeric display the meter displays all meas urements on a ba...

Page 21: ...eter is accu rate within 3 6 F 2 C Outside this range the meter s accu racy is not specified WARNING RISK OF ELECTRIC SHOCK DO NOT TOUCH HOT L VE CtRCU TS W TH THE TEMPERATURE PROBE To use the tempera...

Page 22: ...SAMP FUSE WITH AN TDENTICAL 0 AMP 250 V FUSE CAT NO 27G1241A RE PI ACE THE O6S AMP FUSE WITH AN IDENTICAL O6 AMP INSTRUMENT FUSE CAT NO 27G1236 ONE SPARE FUSE OF EACH TYPE COMES SUPPLIED WITH YOUR ME...

Page 23: ...rating Use only a fuse of the same type and rating 0 5A 250V5x20mm miniature fuse and 063 amp instrument fuse c 0 6I 5 Place the fuse in the luse compartment 6 Close the battery fuse compartment cover...

Page 24: ...manship The following suggdstions will help you care for the meter so you can enjoy it for years Keep the meter dry lf it gets wet immediately wipe it dry Liquids might contain minerals that can corro...

Page 25: ...NOTES 46...

Page 26: ...NOTES tF 47...

Page 27: ...Radio Shack A Divlsion of Tandy Corporation Fort Worth Texas 76102 81 10627304 Printed in Taiwan 3A4...

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