Mastech MS8201H Operator's Manual
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Mastech MS8201H Operator's Manual

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DIGITAL MULTIMETER
OPERATOR'S MANUAL

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Summary of Contents for Mastech MS8201H

  • Page 1 DIGITAL MULTIMETER OPERATOR’S MANUAL...

  • Page 2: Table Of Contents

    CONTENTS ……1 SAFETY INFORMATION ……1 PRELIMINARY ……2 DURING USE ……5 SYMBOLS ……6 MAINTENANCE ……8 DESCRIPTION ……8 NAMES OF COMPONENTS ……10 SWITCH AND BUTTONS ELUCIDATE ……11 SPECIFICATIONS GENERAL SPECIFICATIONS ……11 ……12 ELECTRICAL SPECIFICATIONS OPERATING INSTRUCTION ……20 ……20 READ HOLD ……20 BACK LIGHT ……21 DC/AC TRANSFORM ……21...
  • Page 3 MEASURING DC CURRENT ……26 MEASURING AC CURRENT ……29 ……31 4.10 MEASURING RESISTANCE 4.11 MEASURING CAPACITANCE ……33 4.12 MEASURING INDUCTANCE ……35 ……37 4.13 MEASURING TEMPERATURE ……39 4.14 MEASURING FREQUENCY ……40 4.15 DIODE TESTING ……42 4.16 CONTINUITY TESTING ……44 4.17 TRANSISTOR TESTING ……46 4.18 TTL LOGIC TESTING ……49...

  • Page 4: Safety Information

    1. SAFETY INFORMATION WARNING To ensure safe operation, and in order to exploit to the full the functionality of the meter, please follow directions this section carefully. This multimeter has been designed according IEC-1010 concerning electronic measuring instruments with an overvoltage category (CAT ΙΙ) and pollution 2.

  • Page 5: During Use

    • Protection of the meter against misuse. 1.1.2 When the meter is delivered, check that it has not been damaged in transit. 1.1.3 When poor condition under harsh preservation or shipping conditions caused, inspect and confirm this meter without delay. 1.1.4 Measuring leads must be in good condition.
  • Page 6 each range of measurement. 1.2.3 When the meter is linked to a measurement circuit, do not touch unused terminals. 1.2.4 When the value scale to be measured is unknown beforehand, set the range selector at the highest position. 1.2.5 Do not measure voltage if the voltage on the terminals exceeds 1000V above earth ground.
  • Page 7 circuit under test. 1.2.9 When carrying out measurements on TV or switching power circuits always remember that there may be high amplitude voltages pulses at test points, which can damage the meter. 1.2.10 Never perform resistance, capacitance, inductance, diode and continuity measurements on live circuits.

  • Page 8: Symbols

    1.2.15 Please do not store or use meter in areas exposed to direct sunlight, high temperature, humidity or condensation. 1.3 SYMBOLS Important safety information, refer to the operating manual. insulation （ Protection Double classΙΙ）. Overvoltage (Installation) category II, Pollution Degree 2 per IEC1010-1 refers to the level Impulse...

  • Page 9: Maintenance

    AC (alternating current) DC (direct current) Continuity Buzzer AC or DC (alternating current or direct current) 1.4 MAINTENANCE 1.4.1 Please do not attempt to adjust or repair the meter by removing the rear case while voltage is being applied. A technician who fully understands danger involved should only carry out such actions.
  • Page 10 (quick acting). 1.4.5 Do not use abrasives or solvents on the meter, use a damp cloth 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.

  • Page 11: Description

    2. DESCRIPTION - This meter is a portable professional measuring instrument with large LCD and back light easily reading. - Single operation of a range switch makes measurement convenient. Overload protection and low battery indication are provided, this meter is ideal for use in the fields, workshop, school, hobby...
  • Page 12 ⑧ , Ω, ℃, A, V, Hz, H Jack ⑨ COM jack ⑩ DC/AC Button（DC/AC） Back Light Button (LIGHT) Data Button(HOLD) Digital Multimeter...

  • Page 13: Switch And Buttons

    SWITCH BUTTONS ELUCIDATION • Range Switch This switch is used to select functions and desired ranges. • Power Button ( This Button is used to the switch of power. • L/C Button（L/C） This Button is used to the capacitance and inductance measurements. In this range, press the button to begin the measurement.

  • Page 14: Specifications

    3. SPECIFICATIONS Accuracy is specified for a period of year after calibration and at 18℃ to 28 ℃ （64°F to 82°F） with relative humidity to 75%. 3.1 GENERAL SPECIFICATIONS 3.1.1Measuring method: Dual-slope integration A/D converter 3.1.2 Sampling Time: approx. 0.4 second 3.1.3 Display: 25mm LCD 3.1.4 Max.

  • Page 15: Electrical

    (quick acting, resistance ≤1Ω), F 12.5A/250V (quick acting). 3.1.12 Power Supply: 9V battery, NEDA 1604 or 6F22 3.1.13 Operating Temperature: 0℃ to 40℃（32°F to 104°F） 3.1.14 Storage Temperature: -10℃ to 50℃（10°F to 122°F） 3.1.15 Dimension: 185×84×38 mm 3.1.16 Weight: approx. 300g（including battery）...
  • Page 16 250V DC or rms AC, 2V-1000V ranges: 1000V DC or 700V rms AC. - Max. Input Voltage: 1000V DC NOTE: At the little voltage range, the meter will show unsteady reading when test leads haven’t reach the circuit, it’s normal because the meter is very sensitivity.
  • Page 17 rms of sine wave. - Max. Input Voltage: 700V rms AC NOTE: At the little voltage range, the meter will show unsteady reading when test leads haven’t reach the circuit, it’s normal because the meter is very sensitivity. When test leads touch the circuit, you can get the true reading.
  • Page 18 3.2.4 AC Current Range Resolution Accuracy ±（1.2% of rdg + 5 digits） 1μA ±（1.2% of rdg + 5 digits） 20mA 10μA ±（2.0% of rdg + 5 digits） 200mA 100μA ±（3.0% of rdg + 10 digits） 10mA - Overload Protection: 2 to 200mA ranges: 250mA/250V fuse(quick acting, resistance ≤1Ω)，...
  • Page 19 ±（1.0% of rdg + 1 digit） 200kΩ 100Ω ±（1.0% of rdg + 1 digit） 2MΩ 1kΩ ±（1.0% of rdg + 5 digits） 20MΩ 10kΩ Open Circuit Voltage: approx. 700mV - Overload Protection: 250V DC or rms AC 3.2.6 Capacitance Range Resolution Accuracy ±（4% of rdg + 8 digits）...
  • Page 20 ±（4% of rdg + 3 digits） 200mH 0.1mH ±（4% of rdg + 3 digits） ±（4% of rdg + 5 digits） 10mH - Overload Protection: 250mA/250V fuse(quick acting, resistance ≤1Ω) - Tested Inductance: Q≥10，Internal impedance≤1kΩ 3.2.8 Temperature Range -20℃ to 1000℃ Resolution 1℃...

  • Page 21: Transistor Hfe

    more 10V rms - Overload Protection: 250V rms AC 3.2.10 Transistor hFE Range Function Display: read approximate hFE value (0-1000) of transistor under test (ALL TYPE) - Base Current: approx. 10μA，Vce: approx. 2.8V - Overload Protection: 250mA/250V fuse (quick acting, resistance ≤1Ω) 3.2.11 Diode Range...
  • Page 22 3.2.12 Continuity Range Function Built-in buzzer will sound, if resistance 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 “...

  • Page 23: Operating Instruction

    4. OPERATING INSTRUCTION 4.1 READ HOLD If you need data hold when measuring, you can put on “HOLD” button, it will hold the reading; if you put the button again, data hold is not continue. 4.2 BACK LIGHT If the light is dark to make the reading difficult when measuring, you can put on “LIGHT”...

  • Page 24: Dc/Ac Transform

    voltage is more than 7V, because the working current is higher and the voltage will decline. (When “ “ shows, the accuracy of the measurement can not be assured.) You need not replace the battery. When you use normally (back light is not using), “...

  • Page 25: Preparation For

    should be loosened. 4.5 PREPARATION MEASUREMENT 4.5.1 Put on the “ ” button. If the battery voltage is less than 7V, display will show “ ”, the battery should be changed at this time. 4.5.2 The “ ” besides the input jack shows that the input voltage or current should...

  • Page 26: Measuring Dc Voltage

    4.6 MEASURING DC VOLTAGE WARNING You can’t input the voltage which more than 1000V DC, it’s possible to show higher voltage, but it’s may destroy the inner circuit. Pay attention not to get an electric shock when measuring high voltage. 4.6.1 Connect the black test lead to the COM jack and the red test lead to the V jack.
  • Page 27 set the range selector at the highest position. Digital Multimeter...

  • Page 28: Measuring Ac Voltage

    4.7 MEASURING AC VOLTAGE WARNING You can’t input the voltage which more than 700V rms AC, it’s possible to show higher voltage, but it’s may destroy the inner circuit. Pay attention not to get an electric shock when measuring high voltage. 4.7.1 Connect the black test lead to the COM jack and the red test lead to the V jack.

  • Page 29: Measuring Dc Current

    measured is unknown 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. Digital Multimeter...
  • Page 30 4.8.1 Connect the black test lead to the COM jack and the red test lead to the A jack for a maximum of 200mA current. For a maximum of 10A, move the red lead to the 10A jack. 4.8.2 Set the range switch at the desired A range position.
  • 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. Digital Multimeter...

  • Page 32: Measuring Ac Current

    4.9 MEASURING AC CURRENT WARNING Shut down the power of the tested circuit, then connect the meter with the circuit for measurement. 4.9.1 Connect the black test lead to the COM jack and the red test lead to the A jack for a maximum of 200mA current.
  • 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. Digital Multimeter...

  • Page 34: Measuring Resistance

    4.10 MEASURING RESISTANCE WARNING When measuring in-circuit resistance, be sure the circuit under test has all power removed and that all capacitors have been discharged fully. 4.10.1 Connect the black test lead to the COM jack and the red test lead to the Ω...
  • Page 35 Digital Multimeter...

  • Page 36: Measuring Capacitance

    4.11 MEASURING CAPACITANCE WARNING To avoid electrical shock, remove test leads from measurement circuits before measuring the capacitance of a capacitor. To avoid electric shock, be sure the capacitors have been discharged fully before inserting capacitors under measurement into multifunction testing socket. 4.11.1 Connect the black test lead to the COM jack and the red test lead to the...
  • Page 37 needed, plug multifunction testing equipment (spare parts) into COM jack and Digital Multimeter...

  • Page 38: Measuring Inductance

    jack, also put the capacitor feet into two long sockets of multifunction testing equipment, then capacitance testing is ready. NOTE: • At the small capacitor range, the reading will include the small value because some influence from the distribution of test leads. It will not influence the accuracy of measuring.
  • Page 39 4.12.4 You 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 Digital Multimeter...

  • Page 40: Measuring

    two long sockets of multifunction testing equipment, then inductance testing is ready. NOTE: • Inductance test shall be stay away from any strong magnetic field to ensure an accurate measurement. 4.13 MEASURING TEMPERATURE WARNING To avoid electrical shock, do not connect the thermocouples with the electriferous circuit.
  • 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. Digital Multimeter...

  • Page 42: Measuring Frequency

    4.14 MEASURING FREQUENCY 4.14.1 Connect the black test lead to the COM jack and the red test lead to the Hz jack. 4.14.2 Set the range switch 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.

  • Page 43: Diode Testing

    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 Digital Multimeter...
  • Page 44 lead is “+”) 4.15.2 Set the range switch at the range position. 4.15.3 Connect the red lead to the anode, the black lead to the 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.

  • Page 45: Continuity Testing

    4.16 CONTINUITY TEST WARNING When testing the circuit continuity, be sure that the power of the circuit been shut down capacitors have been discharged fully. Digital Multimeter...
  • Page 46 4.16.1 Connect the black test lead to the COM jack and the red test lead to the Ω jack. 4.16.2 Set the range switch at the range position. 4.16.3 Connect test leads across two points of the circuit under testing. exists （...

  • Page 47: Transistor Testing

    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 Digital Multimeter...
  • Page 48 COM jack and V jack. 4.17.3 Identify whether 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...

  • Page 49: Ttl Logic Testing

    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. Digital Multimeter...
  • Page 50 4.18.2 Set the range switch at the range 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 “...
  • Page 51 Digital Multimeter...

  • Page 52: Maintenance

    5. MAINTENANCE 5.1 BATTERY REPLACEMENT WARNING Before attempting to remove the battery cover or open the case, be sure that test leads have been disconnected from measurement circuit to avoid electric shock hazard. ’appears on the 5.1.1 If the sign‘ LCD display, it indicates that the battery should be replaced.
  • Page 53 Battery cover 9V Battery Fig 15 Digital Multimeter...

  • Page 54: Fuse Replacement

    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 ≤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.

  • Page 55: Test Leads

    5.3 TEST LEADS REPLACEMENT WARNING 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. Electric ratings of the test leads: 1000V 10A. You must be replaced the test leads if the lead is exposed.

  • Page 56: Accessories

    6. ACCESSORIES Test Leads: Electric Ratings 1000V 10A one piece Battery: 9V, NEDA 1604 or 6F22 one piece Operating Manual one piece Holster one piece Thermocouple (K type) one piece Multifunction test socket one piece Digital Multimeter...

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