Mastech MS8201H Operator'S Manual Download Page 54

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5.2 FUSE REPLACEMENT

WARNING

To avoid electrical shock, remove
test leads from measurement
circuits before replacing the fuse.

For protection against fire, replace
fuses only with specified ratings:
F1: F 250mA/250V (quick acting,
resistance

≤

)

，

F2: F 12.5A/250V

(quick acting).

5.2.1 Fuse rarely need replacement

and blow almost always as a result
of the operator’s error.

5.2.2 Loosen the fixing screw of the

case and remove it.

5.2.3 Replace the blown fuse with

ratings specified.

5.2.4 Put the case as its origin.

Digital Multimeter 51

Summary of Contents for MS8201H

Page 1: ...DIGITAL MULTIMETER OPERATOR S MANUAL ...

Page 2: ... COMPONENTS 8 2 2 SWITCH AND BUTTONS ELUCIDATE 10 3 SPECIFICATIONS 11 3 1 GENERAL SPECIFICATIONS 11 3 2 ELECTRICAL SPECIFICATIONS 12 4 OPERATING INSTRUCTION 20 4 1 READ HOLD 20 4 2 BACK LIGHT 20 4 3 DC AC TRANSFORM 21 4 4 L C TRANSFORM 21 4 5 PREPARATION FOR MEASUREMENT 22 4 6 MEASURING DC VOLTAGE 23 4 7 MEASURING AC VOLTAGE 25 ...

Page 3: ...NCE 33 4 12 MEASURING INDUCTANCE 35 4 13 MEASURING TEMPERATURE 37 4 14 MEASURING FREQUENCY 39 4 15 DIODE TESTING 40 4 16 CONTINUITY TESTING 42 4 17 TRANSISTOR TESTING 44 4 18 TTL LOGIC TESTING 46 5 MAINTENANCE 49 5 1 BATTERY REPLACEMENT 49 5 2 FUSE REPLACEMENT 51 5 3 TEST LEADS REPLACEMENT 52 6 ACCESSORIES 53 ...

Page 4: ...ring instruments with an overvoltage category CAT ΙΙ and pollution 2 Follow all safety and operating instructions to ensure that the meter is used safely and is kept in good operating condition With proper use and care your digital multimeter will give you years of satisfactory service 1 1 PRELIMINARY 1 1 1 When using the meter the user must observe all normal safety rules concerning Protection ag...

Page 5: ...condition Before using verify that the insulation on test leads is not damaged and or the leads wire is not exposed 1 1 5 Full compliance with safety standards can be guaranteed only if used with test leads supplied If necessary they must be replaced with the same model or same electric ratings 1 2 DURING USE 1 2 1 Before using you must select the right input jack function and range 1 2 2 Never ex...

Page 6: ...above earth ground 1 2 6 Always be careful when working with voltages above 60V DC or 30V AC rms keep fingers behind the probe barriers while measuring 1 2 7 Never connect the meter leads across a voltage source while the function switch is in the current resistance capacitance inductance temperature frequency diode transistor or continuity mode Doing so can damage the meter 1 2 8 Before rotating ...

Page 7: ...iode and continuity measurements on live circuits 1 2 11 Never perform capacitance measurements unless the capacitor to be measured has been discharged fully 1 2 12 Never use the meter under the condition of the explosive air steam or dirt 1 2 13 If any faults or abnormalities are observed the meter can not be used any more and it has to be checked out 1 2 14 Never use the meter unless the rear ca...

Page 8: ...otection classΙΙ CAD II Overvoltage Installation category II Pollution Degree 2 per IEC1010 1 refers to the level of Impulse Withstand Voltage protection provided CAT III Overvoltage Installation category III Pollution Degree 2 per IEC1010 1 refers to the level of Impulse Withstand Voltage protection provided Conforms to European Union Directive Earth ground Power ON OFF Fuse Low Battery Digital M...

Page 9: ...rstands danger involved should only carry out such actions 1 4 2 Before opening the battery cover or case of the meter always disconnect test leads from all tested circuits 1 4 3 To avoid the wrong reading causing electricity attack when the meter displays you must change the battery 1 4 4 For continue protection against fire replace fuse only with the specified voltage and current ratings F 250mA...

Page 10: ...oth and mild detergent only 1 4 6 Always set the power switch to the OFF position when the meter is not in use 1 4 7 If the meter is to be stored for a long period of time the batteries should be removed to prevent damage to the unit Digital Multimeter 7 quick acting ...

Page 11: ...verload protection and low battery indication are provided this meter is ideal for use in the fields workshop school hobby and home applications This meter has function of data hold When using it can show ranges engineering unit enunciators measuring results 2 1 NAMES OF COMPONENTS LCD Display L C Button Power Button Range Switch Battery cover 10A Jack 8 Digital Multimeter Top shell ...

Page 12: ... COM jack DC AC Button DC AC Back Light Button LIGHT Data Button HOLD Digital Multimeter 9 Ω A V Hz H Jack 11 12 ...

Page 13: ...ts In this range press the button to begin the measurement The other ranges will be loosened Data Button HOLD This Button is used to the switch of data hold DC AC Button DC AC This Button is used to the AC voltage and AC current measurements Once press the button to the alternative state then the measurement begins The other ranges will be loosened Back Light Button LIGHT This Button is used to th...

Page 14: ...e approx 0 4 second 3 1 3 Display 25mm LCD 3 1 4 Max Show Value 1999 3 1 2 3 1 5 Polarity Indication indicates negative polarity 3 1 6 Overrange Indication Display 1 3 1 7 Unit showing showing of electrical capacity 3 1 8 Low Battery Indication displayed 3 1 9 Operating Altitude 2000 meters 7000 ft maximum 3 1 10 Max Voltage Between Terminals And Earth Ground 1000V DC or 700 3 1 11 Fuse Protection...

Page 15: ...Dimension 185 84 38 mm 3 1 16 Weight approx 300g including battery 3 2 ELECTRICAL SPECIFICATIONS Circumstance Temperature 23 5 Relative Humidity 75 3 2 1 DC Voltage Range Resolution Accuracy 200mV 0 1mV 0 5 of rdg 1 digit 2V 1mV 0 5 of rdg 3 digits 20V 10mV 0 5 of rdg 3 digits 200V 100mV 0 5 of rdg 3 digits 1000V 1V 0 8 of rdg 3 digits Input Impedance 10MΩ Overload Protection 200mV range 12 Digita...

Page 16: ...ty When test leads touch the circuit you can get the true reading 3 2 2 AC Voltage Range Resolution Accuracy 200mV 0 1mV 1 2 of rdg 5 digits 2V 1mV 1 0 of rdg 5 digits 20V 10mV 1 0 of rdg 5 digits 200V 100mV 1 0 of rdg 5 digits 700V 1V 1 2 of rdg 3 digits Input Impedance 10MΩ Overload Protection 200mV range 250V DC or rms AC 2V 700V ranges 1000V DC or 700V rms AC Frequency Range 40 to 400Hz Respon...

Page 17: ... touch the circuit you can get the true reading 3 2 3 DC Current Range Resolution Accuracy 2mA 1μA 1 0 of rdg 3 digits 20mA 10μA 1 0 of rdg 3 digits 200mA 100μA 1 5 of rdg 5 digits 10A 10mA 2 0 of rdg 10 digits Overload Protection 2 to 200mA ranges F1 F 250mA 250V fuse quick acting resistance 1Ω 10A range F2 F 12 5A 250V fuse quick acting Max Input Current mA Jack 200mA 10A Jack 10A Voltage Drop 2...

Page 18: ...0mA ranges F1 F 250mA 250V fuse quick acting resistance 1Ω 10A range F2 F 12 5A 250V fuse quick acting Max Input Current mA Jack 200mA 10A Jack 10A Voltage Drop 200mV Frequency Range 40 to 400Hz Response Average calibrated in rms of sine wave 3 2 5 Resistance Range Resolution Accuracy 200Ω 0 1Ω 1 0 of rdg 3 digits 2kΩ 1Ω 1 0 of rdg 1 digit 20kΩ 10Ω 1 0 of rdg 1 digit Digital Multimeter 15 ...

Page 19: ...apacitance Range Resolution Accuracy 2nF 1pF 4 of rdg 8 digits 20nF 10pF 4 of rdg 3 digits 200nF 0 1nF 4 of rdg 3 digits 2μF 1nF 4 of rdg 3 digits 20μF 10nF 4 of rdg 5 digits Overload Protection F1 F 250mA 250V fuse quick acting resistance 1Ω 3 2 7 Inductance Range Resolution Accuracy 2mH 0 001mH 4 of rdg 8 digits 20mH 0 01mH 4 of rdg 3 digits 16 Digital Multimeter ...

Page 20: ...nce Q 10 Internal impedance 1kΩ 3 2 8 Temperature Range 20 to 1000 Resolution 1 20 to 0 5 of rdg 4digits Accuracy 0 to 400 1 of rdg 3digits 400 to1000 2 of rdg 3digits Overload Protection F1 F 250mA 250V fuse quick acting resistance 1Ω 3 2 9 Frequency Range Resolution Accuracy 20kHz 10Hz 1 5 of rdg 5 digits Sensitivity 200mV rms and input no Digital Multimeter 17 ...

Page 21: ...under test ALL TYPE Base Current approx 10μA Vce approx 2 8V Overload Protection F1 F 250mA 250V fuse quick acting resistance 1Ω 3 2 11 Diode Range Resolution Function 1mV Display read approximate forward voltage of diode Forward DC Current approx 1mA Reversed DC Voltage approx 2 8V Overload Protection 250V DC or rms AC 18 Digital Multimeter ...

Page 22: ...e is lower than 50Ω Open circuit voltage approx 2 8V Overload Protection 250V DC or rms AC 3 2 13 TTL Logic Range Function When logic level is less or on 0 8V LCD displays and the buzzer produces sound When logic level is more and on 2 0V LCD displays Digital Multimeter 19 ...

Page 23: ...ton to open the back light NOTE LED is the main source of back light Its working current is large although the meter has the timer equipment time is 5 seconds and it will off automatically after 5 seconds often use back light will shorten the battery life you d better not to use the back light so frequently if it s not necessary When the battery voltage is less than 7V it will show But if you use ...

Page 24: ...p You need replace it till show again 4 3 DC AC transform Put down the DC AC button when measuring the voltage Meter will be transformed to the AC measuring state NOTE Except the AC voltage and AC current ranges you ought to loosen DC AC button 4 4 L C transform Put down the L C button when measuring the capacitance and inductance Then the meter can be tested NOTE Except the capacitance and induct...

Page 25: ...cation on the sticker of the meter to protect the inner circuit from damaging 4 5 3 Select a function and a range for the item to be measured through rotating the range switch accordingly When the value scale to be measured is unknown beforehand set the range selector at the highest position 4 5 4 When connection first connect to the public testing line then to the electriferous testing line When ...

Page 26: ...d the red test lead to the V jack 4 6 2 Set the range switch at the desired V range position 4 6 3 Connect test leads across the source or load under measurement 4 6 4 You can get a reading from LCD display The polarity of the red lead connection will be indicated along with the voltage value NOTE When only the figure 1 is displayed it indicates overrange situation and the higher range has to be s...

Page 27: ...set the range selector at the highest position 24 Digital Multimeter ...

Page 28: ...lead to the COM jack and the red test lead to the V jack 4 7 2 Set the range switch at the desired V range position 4 7 3 Put down the DC AC button meter will be transformed to the AC measuring state 4 7 4 Connect test leads across the source or load under measurement 4 7 5 You can get reading from LCD NOTE When only the figure 1 is displayed it indicates overrange situation and the higher range h...

Page 29: ...known beforehand set the range selector at the highest position 4 8 MEASURING DC CURRENT WARNING Shut down the power of the tested circuit then connect the meter with the circuit for measurement 26 Digital Multimeter ...

Page 30: ...ition 4 8 3 Connect test leads in series with the load under measurement 4 8 4 You can get reading from LCD The polarity of red connection will be indicated along with the voltage value NOTE When only the figure 1 is displayed it indicates overrange situation and the higher range has to be selected When the value scale to be measured is unknown beforehand set the range selector at the highest posi...

Page 31: ... means the maximum current of A socket is 250mA the maximum current of 10A socket is 12 5A over current will destroy the fuse 28 Digital Multimeter ...

Page 32: ... 10A jack 4 9 2 Set the range switch at the desired A range position 4 9 3 Put down the DC AC button meter will be transformed to the AC measuring state 4 9 4 Connect test leads in series with the load under measurement 4 9 5 You can get reading from LCD NOTE When only the figure 1 is displayed it indicates overrange situation and the higher range has to be selected When the value scale to be meas...

Page 33: ... means the maximum current of A socket is 250mA the maximum current of 10A socket is 12 5A over current will destroy the fuse 30 Digital Multimeter ...

Page 34: ...nge switch at the desired Ω range position 4 10 3 Connect test leads across the resistance under measurement 4 10 4 You can get reading from LCD NOTE When only the figure 1 is displayed it indicates overrange situation and the higher range has to be selected For measuring resistance above 1MΩ the meter may take a few seconds to get stable reading When the input is not connected i e at open circuit...

Page 35: ...32 Digital Multimeter ...

Page 36: ...nder measurement into multifunction testing socket 4 11 1 Connect the black test lead to the COM jack and the red test lead to the jack 4 11 2 Set the range switch at the desired F range position and press L C button down 4 11 3 Before connect test leads across two sides of the capacitor under measurement be sure that the capacitor has been discharged fully 4 11 4 You can get reading from LCD 4 11...

Page 37: ...is needed put the plug of multifunction testing equipment spare parts into COM jack and 34 Digital Multimeter ...

Page 38: ...distribution of test leads It will not influence the accuracy of measuring It takes time to steady the reading when measuring high capacity 4 12 MEASURING INDUCTANCE 4 12 1 Connect the black test lead to the COM jack and the red test lead to the H jack 4 12 2 Set the range switch at the desired H range position and press L C button down 4 12 3 Connect test leads across two sides of the inductor un...

Page 39: ...can get reading from LCD 4 12 5 When frequent inductance testing is needed put the plug of multifunction testing equipment spare parts into COM jack and H jack and put the inductor feet into 36 Digital Multimeter ...

Page 40: ...sure an accurate measurement 4 13 MEASURING TEMPERATURE WARNING To avoid electrical shock do not connect the thermocouples with the electriferous circuit 4 13 1 Set the range switch at the range position 4 13 2 The LCD display will show the current environment temperature 4 13 3 Insert K type thermocouples into the COM jack and jack or you can Digital Multimeter 37 ...

Page 41: ...insert it by using multifunction testing equiqment then connect the object with the thermocouple probe for measurement 4 13 4 You can get reading from LCD 38 Digital Multimeter ...

Page 42: ...witch at the 20kHz range position 4 14 3 Connect test leads across the source or load under measurement 4 14 4 You can get reading from LCD NOTE Reading is possible at input voltages above 10Vrms but the accuracy is not guaranteed In noisy environment it is preferable to use shield cable for measuring small signal Digital Multimeter 39 ...

Page 43: ...4 15 TESTING DIODE 4 15 1 Connect the black test lead to the COM jack and the red test lead to the V jack The polarity of red 40 Digital Multimeter ...

Page 44: ...he cathode of the diode under testing 4 15 4 You can get reading from LCD NOTE The meter will show the approximate forward voltage drop of the diode If the lead connection is reversed only figure 1 will be displayed When the input is not connected i e at open circuit the figure 1 will be displayed Digital Multimeter 41 ...

Page 45: ...4 16 CONTINUITY TEST WARNING When testing the circuit continuity be sure that the power of the circuit has been shut down and all capacitors have been discharged fully 42 Digital Multimeter ...

Page 46: ... 2 Set the range switch at the range position 4 16 3 Connect test leads across two points of the circuit under testing 4 16 4 If continuity exists i e resistance less than about 50Ω built in buzzer will sound NOTE If the input open circuit the figure 1 will be displayed Digital Multimeter 43 ...

Page 47: ...4 17 TESTING TRANSISTOR 4 17 1 Set the rotary switch at the hFE range position 4 17 2 Put two plugs of multifunction testing equipment spare parts into 44 Digital Multimeter ...

Page 48: ...her the transistor is NPN or PNP type and insert emitter base and collector leads into the proper holes of the transistor on the multifunction testing equipment spare parts for testing 4 17 4 You can get reading from LCD Digital Multimeter 45 ...

Page 49: ...4 18 TTL LOGIC TEST 4 18 1 Connect the black test lead to the COM jack and the red test lead to the V jack 46 Digital Multimeter ...

Page 50: ...e position 4 18 3 Connect test leads across two sides of the circuit under testing 4 18 4 When logic level is less or on 0 8V LCD displays and the buzzer produces sound When logic level is more and on 2 0V LCD displays Digital Multimeter 47 ...

Page 51: ...48 Digital Multimeter ...

Page 52: ...rom measurement circuit to avoid electric shock hazard 5 1 1 If the sign appears on the LCD display it indicates that the battery should be replaced 5 1 2 Loosen the fixing screw of the case and remove battery cover from the front of the meter 5 1 3 Replace the exhausted battery with a new one 5 1 4 Put the battery cover as its origin Digital Multimeter 49 ...

Page 53: ...Battery cover 9V Battery Fig 15 50 Digital Multimeter ...

Page 54: ...fuses only with specified ratings F1 F 250mA 250V quick acting resistance 1Ω F2 F 12 5A 250V quick acting 5 2 1 Fuse rarely need replacement and blow almost always as a result of the operator s error 5 2 2 Loosen the fixing screw of the case and remove it 5 2 3 Replace the blown fuse with ratings specified 5 2 4 Put the case as its origin Digital Multimeter 51 ...

Page 55: ...andards can be guaranteed only if used with test leads supplied If necessary they must be replaced with the same model or same electric ratings Electric ratings of the test leads 1000V 10A You must be replaced the test leads if the lead is exposed 52 Digital Multimeter ...

Page 56: ...eads Electric Ratings 1000V 10A one piece d Battery 9V NEDA 1604 or 6F22 one piece e Operating Manual one piece f Holster one piece g Thermocouple K type one piece h Multifunction test socket one piece Digital Multimeter 53 ...

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