Mastech M92AH digitalt multimeter brugermanual

1. Introduktion

This manual provides detailed instructions for the safe and effective operation of your Mastech M92AH Digital Multimeter. This device is designed for measuring AC/DC voltage, AC/DC current, resistance, diode testing, hFE testing, and continuity checking. Please read this manual thoroughly before use and retain it for future reference.

2. Sikkerhedsoplysninger

FORSIGTIGHED: To prevent potential damage to the multimeter or personal injury, observe the following safety guidelines:

• Never attempt to measure AC voltage while the multimeter is set to DC mode. This will damage the meter.
• Always ensure the test leads are correctly connected to the appropriate input jacks for the measurement being performed.
• Overskrid ikke de maksimale inputværdier for noget område.
• Udvis ekstrem forsigtighed, når du arbejder med spændingsførende kredsløb.
• Før du ændrer funktioner, skal du frakoble testledningerne fra kredsløbet, der testes.
• Udskift batteriet, når indikatoren for lavt batteri vises, for at sikre nøjagtige aflæsninger.

3. Produktet er slutview

The Mastech M92AH Digital Multimeter is a portable, battery-powered device designed for various electrical measurements.

Figure 1: Mastech M92AH Digital Multimeter. This image displays the Mastech M92AH Digital Multimeter, featuring a green protective casing and a black front panel. Key components visible include the LCD display at the top, a central rotary switch for selecting measurement functions, and three input jacks (10A, COM, VΩmA) at the bottom for connecting test leads. The power button and "AUTO POWER OFF" indicator are also visible near the display.

3.1 Komponenter

• LCD-skærm: 1999 counts display for measurement readings. Includes indicators for low battery and data hold.
• Drejekontakt: Used to select the desired measurement function (e.g., V~, V-, A~, A-, Ω, Diode, hFE, Continuity).
• Indgangsstik:
  • "COM" Jack: Fælles (negativ) indgang for alle målinger.
  • "VΩmA" Jack: Positiv indgang for volumentage, resistance, and current measurements up to 200mA.
  • "10A" Jack: Positive input for high current measurements (up to 10A).
• Power knap: Turns the multimeter ON/OFF.
• Datahold-knap: Fryser den aktuelle aflæsning på displayet.

4. Opsætning

4.1 Batteriinstallation

1. Sørg for, at multimeteret er slukket, og frakobl alle testledninger.
2. Find batteridækslet på bagsiden af ​​enheden.
3. Skru fastholdelsesskruen(e) af, og fjern dækslet.
4. Insert a new 9V battery, observing correct polarity (+ and -).
5. Sæt dækslet til batterirummet på igen, og fastgør det med skruen/skruerne.

4.2 Tilslutning af testledninger

• Always connect the black test lead to the "COM" jack.
• For bdtage, resistance, diode, hFE, continuity, and current measurements up to 200mA, connect the red test lead to the "VΩmA" jack.
• For current measurements between 200mA and 10A, connect the red test lead to the "10A" jack.

5. Betjeningsvejledning

5.1 Power ON/OFF and Auto Power Off

• Press the "ON/OFF" button to turn the multimeter on.
• The multimeter features an auto power-off function to conserve battery life. It will automatically turn off after approximately 15 minutes of inactivity.
• To disable auto power-off (for continuous use), hold down the "DATA HOLD" button while turning the meter on.

5.2 Måling af DC Voltage (V-)

1. Connect the black lead to "COM" and the red lead to "VΩmA".
2. Indstil drejekontakten til den ønskede DC-volumentage range (e.g., 200mV, 2V, 20V, 200V, 1000V). Select a range higher than the expected voltage.
3. Tilslut testledningerne på tværs af den komponent eller det kredsløb, der skal måles.
4. Læs bindtage -værdi på LCD -displayet.

5.3 Måling af AC Voltage (V~)

1. Connect the black lead to "COM" and the red lead to "VΩmA".
2. Indstil drejekontakten til den ønskede AC-volumentage range (e.g., 200V, 700V). Select a range higher than the expected voltage.
3. Tilslut testledningerne på tværs af den komponent eller det kredsløb, der skal måles.
4. Læs bindtage -værdi på LCD -displayet.

5.4 Measuring DC Current (A-)

1. VIGTIG: Sørg for, at kredsløbet er spændingsløst, før multimeteret tilsluttes i serie.
2. Connect the black lead to "COM".
3. For currents up to 200mA, connect the red lead to "VΩmA". For currents up to 10A, connect the red lead to "10A".
4. Set the rotary switch to the appropriate DC Current range (e.g., 20uA, 2mA, 20mA, 200mA, 10A).
5. Åbn kredsløbet, hvor strømmen skal måles, og tilslut multimeteret i serie.
6. Tilslut strøm til kredsløbet, og aflæs strømværdien på LCD-displayet.

5.5 Measuring AC Current (A~)

1. VIGTIG: Sørg for, at kredsløbet er spændingsløst, før multimeteret tilsluttes i serie.
2. Connect the black lead to "COM".
3. For currents up to 200mA, connect the red lead to "VΩmA". For currents up to 10A, connect the red lead to "10A".
4. Set the rotary switch to the appropriate AC Current range (e.g., 20uA, 2mA, 20mA, 200mA, 10A).
5. Åbn kredsløbet, hvor strømmen skal måles, og tilslut multimeteret i serie.
6. Tilslut strøm til kredsløbet, og aflæs strømværdien på LCD-displayet.

5.6 Måling af modstand (Ω)

1. VIGTIG: Sørg for, at kredsløbet eller komponenten er spændingsløs, før du måler modstanden.
2. Connect the black lead to "COM" and the red lead to "VΩmA".
3. Set the rotary switch to the desired Resistance range (e.g., 200Ω, 2kΩ, 20kΩ, 200kΩ, 2MΩ, 20MΩ, 200MΩ).
4. Tilslut testledningerne på tværs af den komponent, der skal måles.
5. Aflæs modstandsværdien på LCD-displayet.

5.7 Diodetest

1. Connect the black lead to "COM" and the red lead to "VΩmA".
2. Set the rotary switch to the Diode symbol.
3. Forbind den røde ledning til anoden og den sorte ledning til katoden på dioden. En fremadrettet voluminiumledningtage drop (typically 0.5V to 0.8V) will be displayed.
4. Vend ledningerne om. Displayet skal vise "OL" (Open Loop) for en god diode.

5.8 hFE Test (Transistor Test)

1. Indstil drejekontakten til hFE-positionen.
2. Identificer om transistoren er NPN eller PNP.
3. Insert the transistor leads (Emitter, Base, Collector) into the corresponding sockets in the hFE test slot.
4. The display will show the hFE value (DC current gain) of the transistor.

5.9 Kontinuitetskontrol

1. Connect the black lead to "COM" and the red lead to "VΩmA".
2. Set the rotary switch to the Continuity symbol (often shared with Diode test, indicated by a buzzer icon).
3. Tilslut testledningerne på tværs af kredsløbet eller komponenten.
4. If continuity exists (resistance below a certain threshold), the buzzer will sound, and the display will show a low resistance value. If no continuity, "OL" will be displayed.

5.10 Datahold

• Press the "DATA HOLD" button to freeze the current reading on the display.
• Press the button again to release the hold and resume live readings.

6. Vedligeholdelse

6.1 Udskiftning af batteri

When the low battery indicator appears on the display, replace the 9V battery as described in the "Battery Installation" section (4.1).

6.2 Rengøring

Tør sagen af ​​med annonceamp klud og mildt rengøringsmiddel. Brug ikke slibemidler eller opløsningsmidler.

6.3 Udskiftning af sikringer

If the current measurement function fails, the fuse may need replacement. This procedure should only be performed by qualified personnel. Refer to the specifications for the correct fuse type.

7. Fejlfinding

8. Specifikationer

9. Garanti og support

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