Table of Contents
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Table of Contents
Related Manuals for Mastech MY70
Summary of Contents for Mastech MY70
- Page 1 MY70/74/74B DIGITAL MULTIMETER OPERATION MANUAL CAT III 600V...
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Page 2: Table Of Contents
CONTENTS CONTENTS 1. General instructions ........1 3.2.8 Measuring temperature (MY74,MY74B) ....14 1.1 Safety information ..........1 ..........14 3.2.9 Measuring current 1.1.1 Safety instructions ..........1 ........16 4. Technical indicators ..........2 1.1.2 Safe working habits 4.1. Comprehensive indicators ......16 ..........4 1.1.3 Safety symbols ........17 4.2. -
Page 3: General Instructions
1. General instructions 1.1.2 Safe working habits * If the meter is used near a source of significant electromagnetic The meter is designed and manufactured according to safety requirements of EN/UL/CSA 61010-1, 61010-2-030, interference, meter readings will become unstable and have 61010-2-033 on electronic measuring instrument and large errors. -
Page 4: Safety Symbols
1.1.3 Safety symbols * When use the test probe to measure, you should place your fingers at the back of retaining ring. Symbols used on the meter surface and instructions: * Before changing the measuring range, you must ensure that Note-Important safety information, refer to the the test probe is not connected to circuit to be tested. -
Page 5: Safe Maintenance Habits
2. Meter appearance description 1.1.4 Safe maintenance habits * To open the meter shell or remove the battery cover, you 2.1. Meter appearance should first pull out the test probe. * When performing meter maintenance, you should use specified replacement parts.* Before opening the meter, you should disconnect all power supplies and ensure that you have no static electricity to avoid damaging the meter components. -
Page 6: Lcd Display
2.3 Input socket 2.2 LCD display See Table 1 for information about the display. Table 2 Input Socket Input Socket Description All common input ends to be measured are connected with common output socket of black test probe or dedicated multifunction test socket. -
Page 7: Operating Guidance
20.00V, 200.0V and 600V; AC voltage measuring range of this 1. Rotate switch to the appropriate position. meter: 200mV (only for MY70), 2.000V, 20.00V, 200.0V and 600V. 2. Respectively connect black and red test probe to VΩ input socket and V input socket. -
Page 8: Testing Diode
Here are some tips for measuring resistance: 3.2.4 Audible continuity testing • The resistance measured on circuit is usually different from WARNING: the rated value of resistance. This is because the test current To avoid damaging meter or device to be measured, before of the meter will flow through all possible channels between testing buzzer continuity, cut off all circuits being tested and test probes. -
Page 9: Transistor Measuring
2. Respectively connect black and red test probe to COM test probe with any circuit in parallel input socket and Hz input socket. Current range of this meter: 20μA/200μA (only for MY70) 3. Measure the frequency value of circuit to be tested with 2.000mA, 20.00mA, 200.0mA and 10.00A;... -
Page 10: Technical Indicators
4. Technical indicators To measure current: 1. Cut off the power supply of circuit to be tested. Discharge 4.1. Comprehensive indicators • Operating environment and condition: all high voltage capacitors on the circuit to be tested. 600V CAT III pollution grade: 2 2. -
Page 11: Accuracy Indicators
Measuring range Resolution Accuracy Open circuit voltage: below 700mV 200mV ±(1.2% of reading + 3digits) 4.2.5 Diode (only for MY70) Function Measuring range Resolution Test environment ±(0.8% of reading + 3digits) 10mV Test current: about 1mA. Open circuit voltage: 200V... -
Page 12: Audible Continuity
Measuring range Accuracy Resolution Description Function Test environment 20μA 0.01μA ±(2.0% of reading + 5digits) (for MY70, MY74B) When built-in buzzer 200μA (only for MY70) 0.1μA Test current: about 1mA. sounds, the resistance ±(0.8% of reading + 1digits) Open circuit voltage: 1μA... -
Page 13: Meter Maintenance
5. Meter maintenance To avoid wrong readings, electric shock or personal injury, when “ ”appears on the meter display, replace the battery This section provides basic maintenance information, immediately. including instructions for replacement of fuse and battery. Use only a fuse with specified amperage, fusing rated value, Do not try to repair the meter unless you are an experienced voltage rated value and fusing speed (F1:FF 400mA H 600V, maintenance person with the relevant calibration, performance... - Page 14 00-05-4176...
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