Mastech MY68

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

Modèl: MY68

1. Entwodiksyon

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. Enfòmasyon sou Sekirite

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.
  • Pa aplike plis pase rated voltage between terminals or between any terminal and earth ground. The maximum input for voltage is 1000V DC or 750V AC.
  • Sèvi ak tèminal, fonksyon, ak ranje ki kòrèk yo pou mezi ou yo.
  • Pa janm mezire kouran sou yon sikwi ki gen vòltage present without first ensuring the circuit is de-energized or the meter is properly connected in series.
  • Fè atansyon lè w ap travay ak volimtagki pi wo pase 60V DC oswa 30V AC RMS, paske sa yo poze yon danje pou elektwo-elektwonik.
  • Toujou dekonekte fil tès yo nan sikwi a anvan ou chanje fonksyon oswa ranje.
  • Ranplase pil la imedyatman lè endikatè pil ki fèb la parèt pou asire lekti ki egzak.
  • Observe the CAT (Category) ratings: CAT III 600V and CAT II 1000V. Do not use the meter in environments exceeding these ratings.

3. Pwodwi souview

3.1. Montre

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

Figi 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. Rotary switch

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

Figi 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. Input Jacks

  • COM: Common terminal for all measurements. Connect the black test lead here.
  • VΩFCx: Antre tèminal pou 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

Figi 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. Bouton

  • 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. Enstalasyon

4.1. Enstalasyon batri

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

  1. Asire w ke miltimèt la etenn epi fil tès yo dekonekte.
  2. Jwenn kouvèti konpatiman pil la sou dèyè mèt la.
  3. Devise vis (yo) ki kenbe yo epi retire kouvèti a.
  4. Konekte yon nouvo pil 9V nan konektè pil la, pandan w ap respekte polarite a.
  5. Mete pil la nan konpatiman an epi remete kouvèti a, byen sere l ak vis(yo).

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

4.2. Konekte fil tès yo

For most measurements:

  • Konekte a nwa plon tès la COM (common) jack.
  • Konekte a wouj plon tès la VΩFCx jack for voltage, resistance, frequency, or capacitance measurements.
  • For current measurements, connect the wouj plon tès la 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. Operasyon Enstriksyon

5.1. Mezire Volim AC/DCtage

  1. Connect the red lead to VΩFCx and the black lead to COM.
  2. Turn the rotary switch to the desired AC Voltage (V~) or DC Voltage (V-) position.
  3. Konekte fil tès yo an paralèl atravè sikwi a oswa konpozan ki pral mezire a.
  4. Li voltage valè sou ekspozisyon an.

5.2. Measuring AC/DC Current

  1. AVÈTISMAN: 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. Open the circuit where current is to be measured and connect the meter in series.
  5. Mete kouran nan sikwi a epi li valè aktyèl la sou ekran an.
  6. ENPÒTAN: Never connect the meter in parallel when measuring current, as this will blow the fuse.

5.3. Mezire rezistans

  1. AVÈTISMAN: Asire w ke sikwi a oswa konpozan an pa gen enèji anvan ou mezire rezistans lan.
  2. Connect the red lead to VΩFCx and the black lead to COM.
  3. Turn the rotary switch to the Ω (Resistance) position.
  4. Konekte fil tès yo atravè konpozan ou vle mezire a.
  5. Li valè rezistans nan ekspozisyon an.

5.4. Measuring Capacitance

  1. AVÈTISMAN: Ensure the capacitor is fully discharged before measuring capacitance.
  2. Connect the red lead to VΩFCx and the black lead to COM.
  3. Turn the rotary switch to the Cap (Capacitance) position.
  4. Konekte fil tès yo atravè kondansateur a.
  5. Li valè a kapasite sou ekspozisyon an.

5.5. Mezire frekans

  1. Connect the red lead to VΩFCx and the black lead to COM.
  2. Turn the rotary switch to the Hz (Frequency) position.
  3. Connect the test leads across the signal source.
  4. Li valè frekans lan sou ekran an.

5.6. Dyòd tès

  1. AVÈTISMAN: 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. Connect the red lead to the anode and the black lead to the cathode of the diode. The display will show the forward voltage gout.
  5. Reverse the leads. The display should show 'OL' (Open Loop) for a good diode.

5.7. Tès kontinwite

  1. AVÈTISMAN: Asire w ke sikwi a oswa konpozan an pa gen enèji.
  2. Connect the red lead to VΩFCx and the black lead to COM.
  3. Turn the rotary switch to the Continuity symbol position.
  4. Konekte fil tès yo atravè sikwi a oswa konpozan an.
  5. Si rezistans lan anba apeprè 50Ω, vibrer la ap sonnen, pou endike kontinwite.

5.8. Transistor (hFE) Test

  1. Vire switch rotary a nan pozisyon hFE a.
  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. Li valè hFE a (gen kouran DC) sou ekran an.

5.9. Fonksyon Kenbe Done

Peze a DATA-H bouton an pou bloke lekti aktyèl la sou ekran an. Peze l ankò pou libere bouton an epi rekòmanse lekti an dirèk yo.

5.10. Range Selection (Manual Ranging)

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

6. Antretyen

6.1. Ranplasman batri

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

6.2. Ranplasman Fuse

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

  1. Asire w ke miltimèt la etenn epi fil tès yo dekonekte.
  2. Louvri kouvèti konpatiman batri a jan sa dekri nan Seksyon 4.1.
  3. Retire ansyen fizib(yo) a avèk prekosyon.
  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. Ranplase kouvèti lòj batri a epi an sekirite li.

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

6.3. Netwayaj

Siye kontè a ak piblisiteamp twal ak yon savon dou. Pa sèvi ak pwodui abrazif oswa solvang. Kenbe tèminal yo pwòp kont pousyè tè ak imidite.

NAN. Depanaj

  • Pa gen ekran oswa ekran an fèb: Tcheke batri a. Ranplase li si sa nesesè.
  • Lekti ki pa kòrèk: 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' (Surcharge) parèt: 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. Espesifikasyon

The Mastech MY68 Digital Multimeter offers the following specifications:

  • Ekspozisyon: 3 3/4 digits, 3260 counts maximum.
  • Auto/Manual Ranging: Wi.
  • Tès tranzistò (hFE): Wi.
  • Test-AC/DC Voltage, AC/DC Current, Resistance, Capacitance, Frequency: Wi.
  • Sous pouvwa: 9V batri.
  • Pwa pwodwi: Apeprè 1.1 liv (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. Garanti ak sipò

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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