Mastech MY68

Mastech MY68 3 3/4 3260-Count Auto-Ranging AC/DC Digital Multimeter User Manual

Model: MY68

1. Inleiding

The Mastech MY68 is a compact, auto-ranging digital multimeter designed for measuring AC/DC voltage, AC/DC current, resistance, capacitance, and frequency. It also includes functions for diode testing, continuity checking, and transistor (hFE) testing. Featuring a 3 3/4 digit display with a maximum reading of 3260 counts, this device is suitable for a wide range of electrical and electronic troubleshooting tasks.

2. Veiligheidsinligting

Please read and understand all safety information before operating this multimeter. Failure to follow these instructions may result in electric shock, fire, or damage to the meter or the equipment under test.

  • Always ensure the test leads are in good condition, free from cracks or damaged insulation.
  • Moenie meer as die gegradeerde voltage between terminals or between any terminal and earth ground. The maximum input for voltage is 1000V DC or 750V AC.
  • Use the correct terminals, function, and range for your measurements.
  • Never measure current on a circuit with voltage present without first ensuring the circuit is de-energized or the meter is properly connected in series.
  • Wees versigtig wanneer jy met vol werktagbo 60V GS of 30V GS RMS, aangesien dit 'n skokgevaar inhou.
  • Ontkoppel altyd die toetsdrade van die stroombaan voordat u funksies of reekse verander.
  • Vervang die battery onmiddellik wanneer die lae battery-aanwyser verskyn om akkurate lesings te verseker.
  • Observe the CAT (Category) ratings: CAT III 600V and CAT II 1000V. Do not use the meter in environments exceeding these ratings.

3. Produk verbyview

3.1. Vertoon

The MY68 features a 3 3/4 digit liquid crystal display (LCD) capable of showing up to 3260 counts. It indicates measurement values, units, function modes, auto-ranging status, data hold, and low battery.

Mastech MY68 Multimeter Display

Figuur 1: Close-up view of the Mastech MY68 multimeter display. The display shows the 3 3/4 digit reading area, along with indicators for AUTO range, DC/AC voltage, current, resistance, capacitance, frequency, diode, continuity, hFE, and battery status.

3.2. Draaiskakelaar

The central rotary switch is used to select the desired measurement function. Turn the switch to the appropriate position for voltage, current, resistance, capacitance, frequency, diode, continuity, or hFE tests. Always ensure the meter is OFF when not in use.

Mastech MY68 Multimeter Rotary Switch

Figuur 2: Close-up view of the Mastech MY68 multimeter's rotary switch. The switch allows selection between various functions including OFF, AC/DC Voltage (V~, V-), Resistance (Ω), Capacitance (Cap), Frequency (Hz), hFE, Diode/Continuity, and AC/DC Current (µA, mA, A).

3.3. Invoeraansluitings

  • COM: Gemeenskaplike terminaal vir alle metings. Koppel die swart toetsdraad hier.
  • VΩFCx: Invoerterminaal vir voltage, resistance, frequency, and capacitance measurements. Connect the red test lead here.
  • mA: Input terminal for current measurements up to 400mA. Fused. Connect the red test lead here for mA measurements.
  • A: Input terminal for current measurements up to 10A. Fused. Connect the red test lead here for A measurements.
Mastech MY68 Multimeter Input Jacks

Figuur 3: Close-up view of the Mastech MY68 multimeter's input jacks. From left to right: 10A MAX (fused), 400mA MAX (fused), COM (common), and VΩFCx (Voltage, Resistance, Frequency, Capacitance). Safety warnings for CAT III 600V and CAT II 1000V are also visible.

3.4. Knoppies

  • RANGE: Toggles between auto-ranging and manual ranging modes. In manual mode, press to cycle through available ranges.
  • DATA-H: Holds the current displayed reading. Press again to release.

4. Opstelling

4.1. Battery Installasie

The MY68 multimeter is powered by a 9V battery (not included). To install or replace the battery:

  1. Maak seker dat die multimeter AFGESKAKEL is en dat die toetsdrade ontkoppel is.
  2. Vind die batteryklepdeksel aan die agterkant van die meter.
  3. Draai die bevestigingsskroef(e) los en verwyder die deksel.
  4. Connect a new 9V battery to the battery connector, observing correct polarity.
  5. Plaas die battery in die kompartement en plaas die deksel terug en maak dit vas met die skroef(e).

If the low battery indicator appears on the display, replace the battery promptly to maintain measurement accuracy.

4.2. Verbinding van toetsdrade

For most measurements:

  • Koppel die swart toetsleiding na die COM (common) jack.
  • Koppel die rooi toetsleiding na die VΩFCx jack for voltage, resistance, frequency, or capacitance measurements.
  • For current measurements, connect the rooi toetsleiding na die mA jack (for up to 400mA) or the A jack (for up to 10A).

Always ensure test leads are securely inserted before taking measurements.

5. Bedryfsinstruksies

5.1. Meting van WS/GS-volumetage

  1. Connect the red lead to VΩFCx and the black lead to COM.
  2. Turn the rotary switch to the desired AC Voltage (V~) of GS Voltage (V-) position.
  3. Koppel die toetsdrade parallel oor die stroombaan of komponent wat gemeet moet word.
  4. Lees die voltage waarde op die skerm.

5.2. Meting van WS/GS-stroom

  1. WAARSKUWING: Ensure the circuit is de-energized before connecting the meter in series.
  2. Connect the black lead to COM. Connect the red lead to the mA jack (for current up to 400mA) or the A jack (for current up to 10A).
  3. Turn the rotary switch to the desired AC Current (A~, mA~, µA~) or DC Current (A-, mA-, µA-) position.
  4. Maak die stroombaan oop waar die stroom gemeet moet word en koppel die meter in serie.
  5. Skakel krag na die stroombaan en lees die stroomwaarde op die skerm.
  6. BELANGRIK: Never connect the meter in parallel when measuring current, as this will blow the fuse.

5.3. Meet weerstand

  1. WAARSKUWING: Maak seker dat die stroombaan of komponent gedeaktiveer is voordat weerstand gemeet word.
  2. Connect the red lead to VΩFCx and the black lead to COM.
  3. Draai die draaiskakelaar na die Ω (Weerstand) posisie.
  4. Verbind die toetsdrade oor die komponent wat gemeet moet word.
  5. Lees die weerstandswaarde op die skerm.

5.4. Meting van Kapasitansie

  1. WAARSKUWING: Ensure the capacitor is fully discharged before measuring capacitance.
  2. Connect the red lead to VΩFCx and the black lead to COM.
  3. Draai die draaiskakelaar na die Kap (Kapasitansie) posisie.
  4. Verbind die toetsdrade oor die kondensator.
  5. Lees die kapasitansiewaarde op die skerm.

5.5. Meet frekwensie

  1. Connect the red lead to VΩFCx and the black lead to COM.
  2. Turn the rotary switch to the Hz (Frequency) position.
  3. Verbind die toetsdrade oor die seinbron.
  4. Lees die frekwensiewaarde op die skerm.

5.6. Diodetoets

  1. WAARSKUWING: Ensure the diode or circuit is de-energized.
  2. Connect the red lead to VΩFCx and the black lead to COM.
  3. Turn the rotary switch to the Diode symbol position.
  4. Verbind die rooi draad aan die anode en die swart draad aan die katode van die diode. Die skerm sal die voorwaartse volume wys.tage druppel.
  5. Draai die drade om. Die skerm behoort 'OL' (Oop Lus) te wys vir 'n goeie diode.

5.7. Kontinuïteitstoets

  1. WAARSKUWING: Maak seker dat die stroombaan of komponent gedeaktiveer is.
  2. Connect the red lead to VΩFCx and the black lead to COM.
  3. Turn the rotary switch to the Continuity symbol position.
  4. Verbind die toetsdrade oor die stroombaan of komponent.
  5. If the resistance is below approximately 50Ω, the buzzer will sound, indicating continuity.

5.8. Transistor (hFE) Toets

  1. Draai die draaiskakelaar na die hFE-posisie.
  2. Identify the type (NPN or PNP) and pin configuration (EBC) of the transistor.
  3. Insert the transistor leads into the corresponding holes in the hFE socket on the meter.
  4. Lees die hFE-waarde (GS-stroomwins) op die skerm.

5.9. Datahoufunksie

Druk die DATA-H knoppie om die huidige lesing op die skerm te vries. Druk dit weer om die houvas te laat vaar en regstreekse lesings te hervat.

5.10. Range Selection (Manual Ranging)

The MY68 operates in auto-ranging mode by default. To select a specific range manually, press the RANGE button. Each press will cycle through the available ranges for the selected function. To return to auto-ranging, press and hold the RANGE button for a few seconds, or turn the rotary switch to a different function and then back.

6. Onderhoud

6.1. Battery vervanging

When the battery symbol appears on the display, the 9V battery needs to be replaced. Refer to Section 4.1 for instructions.

6.2. Sekering vervanging

If the current measurement functions (mA or A) stop working, the corresponding fuse may have blown. To replace a fuse:

  1. Maak seker dat die multimeter AFGESKAKEL is en dat die toetsdrade ontkoppel is.
  2. Open the battery compartment cover as described in Section 4.1.
  3. Carefully remove the old fuse(s).
  4. Replace with new fuses of the correct type and rating:
    • For 400mA input: 0.5A/250V fast-acting fuse.
    • For 10A input: 10A/250V fast-acting fuse.
  5. Plaas die deksel van die batterykompartement terug en maak dit vas.

Always use fuses with the specified voltage and current ratings to prevent damage to the meter or personal injury.

6.3. Skoonmaak

Vee die meter met advertensie afamp lap en sagte skoonmaakmiddel. Moenie skuurmiddels of oplosmiddels gebruik nie. Hou die terminale vry van vuiligheid en vog.

7. Probleemoplossing

  • Geen vertoon of dowwe vertoon: Kontroleer battery. Vervang indien nodig.
  • Verkeerde lesings: Ensure correct function and range are selected. Check test lead connections. Verify the circuit is de-energized for resistance/capacitance.
  • No current reading: Check if the fuse for the selected current range has blown. Replace if necessary (refer to Section 6.2).
  • 'OL' (Oorlading) word vertoon: The measured value exceeds the selected range. If in manual range, select a higher range. If in auto-range, the value exceeds the meter's maximum capability.

8. Spesifikasies

The Mastech MY68 Digital Multimeter offers the following specifications:

  • Vertoon: 3 3/4 digits, 3260 counts maximum.
  • Outomatiese/Handmatige Reikwydtebepaling: Ja.
  • Transistor (hFE) Test: Ja.
  • Test-AC/DC Voltage, AC/DC Current, Resistance, Capacitance, Frequency: Ja.
  • Kragbron: 9V Battery.
  • Produk gewig: Ongeveer 1.1 lbs (0.5 kg).
  • UPC: 849649088990.

Detailed measurement ranges, resolutions, and accuracies are provided in the table below:

Mastech MY68 Multimeter Specifications Table

Figure 4: Detailed specifications table for the Mastech MY68 multimeter, including ranges, resolutions, and accuracies for DC Voltage, AC Voltage, Resistance, Frequency, Capacitance, DC Current, and AC Current measurements.

9. Waarborg en Ondersteuning

For warranty information or technical support, please refer to the documentation provided with your purchase or contact your local Mastech distributor. Keep your purchase receipt as proof of purchase.

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