MULTI MEASURING INSTRUMENTS M-270 Instruction Manual

M-270 INSTRUCTION MANUAL Thank you very much for selecting our digital AC/DC clamp-on Tester M-270. This model is complex instrument and employ a very reliable mechanical/electronic design. Before you use your new instrument, read this Instruction Manual completely and familiarize yourself thoroughly with all functions. Keep this manual carefully to take out whenever you need. 1. FEATURES ● Low cost high performance and True RMS reading AC/DC clamp-on tester. ● 4000 count full scale display. ● Additional AC/DC v ...

IN SOME CASES, POWER LINES MAY CARRY VOLTAGE SPIKES OF SEVERAL TIMES OF THE NORMAL SUPPLY VOLTAGE. THIS INSTRUMENT SHOULD NOT BE USED TO MEASURE POWER LINES. *The term of “POWER LINE” means the electrical circuit providing the power to factories, buildings, and etc. ● Before operating this instrument, familiarize yourself with all instructions outlined in this manual. ● Always check to make sure that the function switch is set to the proper position. ● When making measurements, use CAUTION as dangerous voltages may be present in normally safe areas. ● To a ...

①Current transducer(Jaw) 85 ②Jaw opening lever ③Power switch ④Function switch ⑤Range switch ⑥Sub-function switch (--/~,Ω/･))) ⑦Zero adjustment switch ⑧Data hold switch 240 ⑨LCD display ⑩Input terminal(V)(Hz) ⑪COM terminal ⑫Input terminal(Ω)( ｜) ⑬Battery cover ⑭Wrist strap Measuring range (23℃±5℃, ＜80% RH ) : Range/Resolution Accuracy Max. input ~A (50/60Hz) … A Manual range 40A/0.01A ±2.0% rdg±8 dgt AC/DC 2000A 400A/0.1A ±1.5% rdg±8 dgt 2000A/1A ~V (50/60Hz) … V Auto/manual range 400m ...

5-1. Measurement of Current 5-1-1 Measurement of DC Current ① Set the power switch to "ON" position. ② Set the function switch to a range appropriate to the current to be measured. ③ Press the zero adjustment switch once, the zero display will be observed. Note: When pressing the zero adjustment switch in DC 40A range, even if the zero display is not obtained for high sensitivity, however, this is not abnormal and the accuracy is kept in the tolerance. ④ Clamp the conductor of the circuit at the center of CT. Fig.1 ⑤ Read the current value in the display. ⑥ If you make measurements in ...

5-2-1. Measurement of AC Voltage Black Red + ① Set the power switch to "ON" position. ② Connect the plug of red test lead into the “V” terminal and the plug of black test lead into the “COM” terminal. ③ Set the function switch to “~V” range. The auto ranging mode is selected. ④ Contact the tips of the test leads to the circuit under test. ⑤ Read the voltage value in the display. Manual range mode: Fig. 2 Press the range switch to the manual range mode. the instrument changes from the auto range ...

is damaged or the rear case is removed. Remove all electrical inputs before removing the rear case. △ ! WARNING POSSIBLE ELECTRICAL SHOCK or FIRE HAZARD. Do not expose this tester to rain or moisture. Do not operate the tester in the presence of flammable gases or fumes. △ ! CAUTION To avoid damage to the tester, disconnect test leads before changing functions. Do not exceed the maximum input limits. 5-3. Measurement of Resistance and Continuity Check Red + Black ① Set the power switch to "ON" position. ② Connect the plug of red test lead into the ...

① Set the power switch to “ON” position. ② Connect the plug of red test lead into the “Hz” terminal and the plug of black test lead into the “COM” terminal. ③ Set the function switch to “Hz” range. The auto ranging mode is selected and the input sensitivity is set to 10mV. ④ Press the range switch to select the input sensitivity. Subsequent pressing of the switch changes the sensitivity as below 10mV → 100mV → 1V↓ ↑─────────── ⑤ Contact the tips of the test leads to the circuit under test. ⑥ Read the frequency value i ...

When the battery voltage falls below a specified voltage value, the "B" mark will appear in the display. If this occurs, replace the two batteries with new ones as quickly as possible. Turn the power switch to "OFF", prior to installing batteries. To install the batteries, remove the battery cover located on the unit back. Loosen the screw on the battery cover. Replace the two batteries (UM-4 or type AAA) with new ones, observing polarity. Use high-quality batteries which are guaranteed against leakage. OPEN If the instrument is to be left unused for long periods of time, to prevent damage from lea ...