Mastech MS2108A, Operation Manual

Page 1: ... crystal display 8 3 SPECIFICATIONS 10 3 1 GENERAL SPECIFICATIONS 10 3 2 TECHNICAL SPECIFICATIONS 11 4 OPERATION INSTRUCTION 16 4 1 HOLDING READINGS 16 4 2 SWITCHING REL 16 4 3 SWITCHING FREQUENCY OR DUTY 17 4 4 SWITCHING MAXIMUM OR MINIMUM VALUE 17 4 5 SWITCHING FUNCTIONS 18 4 6 BACK LIGHT AND CLAMP LIGHTING BULB 18 4 7 AUTO POWER OFF 19 4 8 PREPARING FOR MEASUREMENT 19 4 9 MEASURING AC CURRENT 2...

Page 2: ...eter and ensure safe operation please read carefully and follow the directions in this manual This meter has been designed according to IEC 1010 concerning electronic measuring instruments with an overvoltage category CAT ΙΙΙ 600V and pollution 2 Follow all safety and operating instructions to ensure safe use of the meter With proper use and care this digital multimeter will give you years of sati...

Page 3: ...he meter to any voltage source while the rotary selector is in the current resistance capacitance diode or continuity range 2 1 2 10 Do not take capacitance measurements until the capacitor to be measured has been fully discharged 1 2 11 Do not use the meter near explosive gases steam or dirt 1 2 12 Stop using the meter if any abnormalities or faults are observed 1 2 13 Do not use the meter unless...

Page 4: ...nstrument with scores of practical applications for professional workshop school hobby and home use The meter can perform measurements of AC DC voltage and current resistance frequency duty capacitance as well as continuity and diode test auto range is available This meter is equipped with reading hold function This meter is equipped with square value measuring function at AC A and AC V range This...

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Page 6: ...quency duty capacitance diode and continuity COM Jack Common input connection for current voltage resistance frequency duty capacitance diode continuity measurement Clamp For measuring current 2 3 LCD Liquid crystal display 8 ALTERNATING CURRENT Direct current Diode test Continuity buzzer AUTO Auto range mode MAX The maximum value is being measured MIN The minimum value is being measured REL DCA z...

Page 7: ... 12 Operating power 1 5V 3 AAA batteries 3 1 13 Battery low indication on LCD 3 1 14 Temperature factor 0 1 Accuracy 3 1 15 Operating temperature 0 to 40 32 F to 104 F 3 1 16 Storage temperature 10 to 50 10 F to 122 F 3 1 17 Dimension 208 78 35mm 3 1 18 Weight approximate 340g including batteries 10 3 2 ELECTRICAL SPECIFICATIONS Ambient temperature 23 5 Relative humidity 75 3 2 1 AC Current Range ...

Page 8: ...quency Max Input current 400A rms AC 3 2 5 2 By ACV range 12 Range Resolution Accuracy 10Hz 0 01Hz 1kHz 0 001kHz 1 5 of rdg 5 digits 10kHz 0 01kHz 10kHz 0 01kHz Take it only as referance Measurement range 10 10kHz Input voltage range 0 6V rms AC higher input voltage at higher frequency Input impedance 10MΩ Max input voltage 750V rms AC 3 2 5 3 By Hz DUTY range Range Resolution Accuracy 9 999Hz 0 0...

Page 9: ...rcuit voltage 0 4V Overload protection 250V DC or rms AC 3 2 8 Diode Range Resolution Function 0 001V Displaying approximate forward voltage of diode Forward DC current 1mA Reversed DC voltage 3 3V Overload protection 250V DC or rms AC 14 3 2 9 Continuity Range Resolution Function 0 1Ω Built in buzzer will sound if resistance is lower than 40Ω Open circuit voltage 1 2V Overload protection 250V DC ...

Page 10: ...h will cancel REL 16 measurement mode and go back to the normal mode REL will disappear in the LCD 6 OL triggering Under REL mode OL shows when input value larger than the allowed value of the measurement mode Press the key again the relative measurement function will be cancelled Disable to enter REL mode when OL shows 7 No analog section bar function under REL mode 4 3 SWITCHING FREQUENCY OR DUT...

Page 11: ...e back light is switched on the clamp lighting bulb will be turned on at the same time 18 NOTE LED which requires a larger working current is the main source of back light Although the meter is equipped with a timer set at about 15 seconds i e the back light will be off automatically after about 15 seconds frequent use of the back light will shorten the life of the batteries Therefore do not use t...

Page 12: ...easured is unknown beforehand set the range to the highest 5 means the maximum input current is 400A rms AC 20 4 10 MEASURING DC CURRENT WARNING Beware of Electrocution Ensure that the test leads are disconnected from the meter before making current clamp measurements 4 11 1 Set the rotary selector to the 40A or 400A range position 4 11 2 Press the SEL key turn to DC current measurement mode 4 11 ...

Page 13: ...ck and the red test lead into the INPUT jack 4 12 2 Set the rotary selector to position to make the meter get into AC V range 4 12 3 Connect the test leads to the voltage source or load terminals for measurement 4 12 5 Take the reading on the LCD NOTE 1 means the maximum input voltage is 750V rms AC 2 If the test result is more than 750V rms AC symbol OL will be displayed on LCD and the build up b...

Page 14: ...to the voltage source or load terminals for measurement 4 13 4 Take the reading on the LCD The polarity symbol denotes 24 the polarity of the end connected by the red test lead NOTE 1 At small voltage range unsteady readings will appear before the test leads contact the circuit This is normal because the meter is highly sensitive When the test leads contact the circuit the true reading will be sho...

Page 15: ... 00 0 will be displayed on LCD if the test frequency is lower than 10 0 Hz It is possible to test the frequency which is higher than 1 kHz but the tolerance of the test result can not be ensure 3 means the maximum input current is 400A rms AC 26 4 13 2 By V range WARNING Beware of Electrocution Pay special attention to avoid electric shock when measuring high voltage Do not input the voltage which...

Page 16: ...NG DUTY 4 14 1 By A range from current clamp WARNING Beware of Electrocution Ensure that the test leads are disconnected from the meter before making current clamp measurements 4 14 1 1 Set the rotary selector to the A range position 4 14 1 2 Press the trigger to open jaw Fully enclose only one conductor 4 14 1 3 Press the Hz to switch to the DUTY measurement 4 14 1 4 Take the reading on the LCD N...

Page 17: ... to switch to DUTY measurement 30 4 14 2 4 Connect test leads to the two end of the source or load for measurement 4 14 2 5 Take the reading on the LCD NOTE 1 If the duty cycle is less than 10 symbol UL will be displayed on LCD if the duty cycle is more than 94 9 symbol OL will be displayed on LCD 3 The input signal frequency range is 10 10 kHz It is possible to test duty cycle of the higher than ...

Page 18: ... to test duty cycle of the higher than 10 kHz frequency signal but the tolerance of the test result can not be ensure 3 means the maximum input voltage is 750V rms AC 32 4 15 MEASURING RESISTANCE WARNING Beware of Electrocution When measuring in circuit resistance make sure that the power of the circuit under test has been turned off and that all capacitors have been fully discharged 4 15 1 Plug t...

Page 19: ...ge position 4 16 3 Press the SEL button to switch to test 4 16 4 Connect the red test lead to the anode and the black test lead to the cathode of the diode for testing 4 16 5 Take the reading on the LCD NOTE 1 The meter will show the approximate forward voltage drop of the diode 2 When the test leads have been reversed or open OL will appear on the LCD 35 ...

Page 20: ...tinuity test 4 17 4 Connect the test leads to the two ends of the circuit for measurement 4 17 5 If the resistance of the circuit being tested is less than 40Ω the built in buzzer will maybe sound 4 17 6 Take the reading on the LCD NOTE If the test leads are open or the resistance of the circuit is over 400Ω OL will appear on the LCD 36 4 18 MEASURING CAPACITANCE WARNING Beware of Electrocution To...

Page 21: ... from the circuit under measurement before opening the battery cover of the meter 5 1 1 If the sign appears it means that the batteries should be replaced 5 1 2 Loosen the fixing screw of the battery cover and remove it 5 1 3 Replace the exhausted batteries with new ones 5 1 4 Put the battery cover back and fix it again to its origin form NOTE Do not reverse the poles of the batteries 5 2 REPLACIN...

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