Brugermanual til Homely M890G digitalt multimeter

1. Introduktion

Thank you for choosing the Homely M890G Digital Multimeter. This device is a portable, battery-powered digital multimeter designed for measuring AC/DC voltage, AC/DC current, resistance, capacitance, frequency, temperature, diode, and transistor hFE. It features a clear digital display, data hold function, and auto power-off for convenience and efficiency. Please read this manual thoroughly before use to ensure safe and proper operation.

2. Sikkerhedsoplysninger

WARNING: To avoid electric shock or personal injury, and to avoid damage to the meter or to the equipment under test, observe the following safety rules:

• Sørg altid for, at måleren er i den korrekte funktion og det korrekte område, før du foretager målinger.
• Påfør ikke mere end den nominelle voltage, som markeret på måleren, mellem terminalerne eller mellem en hvilken som helst terminal og jord.
• Vær yderst forsigtig, når du arbejder med voltages over 60V DC eller 30V AC RMS. Sådan voltages udgør en stødfare.
• Frakobl testledningerne fra kredsløbet, før du ændrer funktioner eller områder.
• Brug ikke måleren, hvis den ser beskadiget ud, eller hvis isoleringen på testledningerne er kompromitteret.
• Remove the test leads from the meter before opening the battery cover or fuse cover.
• Udskift batteriet, så snart indikatoren for lavt batteri vises, for at sikre nøjagtige aflæsninger.
• Brug ikke måleren i eksplosive miljøer med gas, damp eller støv.

3. Pakkens indhold

Verify that all items listed below are present and undamaged:

• Homely M890G Digital Multimeter
• Test Leads (one red, one black)
• K-Type Thermocouple Temperature Probe
• Brugermanual

Figure 3.1: Contents of the Homely M890G Digital Multimeter package, including the multimeter, red and black test leads, a K-type thermocouple, and the instruction manual.

4. Produktet er slutview

The Homely M890G Digital Multimeter features a robust design with a clear LCD display and a rotary switch for function selection.

4.1 Frontpanelets layout

Figur 4.1: Detaljeret front view of the M890G multimeter, highlighting the LCD display, function rotary switch, and input terminals. The display shows '00.0' and test leads are connected.

• LCD-skærm: Viser måleaflæsninger, enheder og funktionsindikatorer.
• Drejekontakt: Used to select the desired measurement function (e.g., V~, V=, A~, A=, Ω, °C, Hz, F, Diode, hFE).
• Funktionsknapper: (e.g., HOLD, RANGE, REL, Hz/DUTY, SELECT) for additional features.
• Indgangsstik:
  • COM: Fælles terminal til den sorte testledning.
  • VΩHz: Input til bdtage, resistance, frequency, capacitance, diode, and continuity measurements (red test lead).
  • mA: Input for milliamperestrømmålinger (rød testledning).
  • 20A MAX: Input for high current measurements up to 20A (red test lead).

4.2 Rear Features

Figur 4.2: Views of the M890G multimeter from the side and rear, illustrating the integrated kickstand for hands-free operation and the battery compartment cover.

• Stativ: Allows the meter to stand upright for easier viewing.
• Batterirum: Located on the rear, secured by screws, for battery replacement.

5. Opsætning

5.1 Batteriinstallation

The M890G multimeter requires a 9V battery (not always included). To install or replace the battery:

1. Ensure the multimeter is turned off and test leads are disconnected.
2. Find batteridækslet på bagsiden af ​​måleren.
3. Skru fastholdelsesskruen(e) ud, og fjern forsigtigt dækslet.
4. Tilslut et nyt 9V-batteri til batteriklemmen, og sørg for korrekt polaritet.
5. Placer batteriet i batterirummet, og sæt dækslet på igen, og fastgør det med skruen/skruerne.

5.2 Tilslutning af testledninger

Tilslut altid den sorte testledning til KOM jack. Connect the red test lead to the appropriate input jack based on the measurement type:

• For bindtage, Resistance, Capacitance, Frequency, Diode, and Continuity measurements, connect the red lead to the VΩHz stik.
• For current measurements up to 500mA, connect the red lead to the mA stik.
• For current measurements up to 20A, connect the red lead to the 20A MAKS stik.

6. Betjeningsvejledning

Before taking any measurement, ensure the test leads are correctly connected and the rotary switch is set to the desired function and range.

6.1 Tænd/sluk

Turn the rotary switch from the OFF position to any desired function to power on the meter. To power off, turn the rotary switch back to the OFF position. The meter features an auto power-off function to conserve battery life after a period of inactivity.

6.2 Måling af DC Voltage (V=)

1. Tilslut den sorte testledning til KOM and the red test lead to VΩHz.
2. Indstil drejekontakten til den ønskede DC-volumentage (V=) range. If the voltagHvis e er ukendt, skal du starte med det højeste område og sænke det efter behov.
3. Tilslut testledningerne parallelt til det kredsløb eller den komponent, der testes.
4. Læs bindtage -værdi på LCD -displayet.

6.3 Måling af AC Voltage (V~)

1. Tilslut den sorte testledning til KOM and the red test lead to VΩHz.
2. Indstil drejekontakten til den ønskede AC-volumentage (V~) range.
3. Connect the test leads in parallel to the AC source or component.
4. Læs bindtage -værdi på LCD -displayet.

6.4 Måling af modstand (Ω)

1. Sørg for, at kredsløbet er spændingsløst, før du måler modstanden.
2. Tilslut den sorte testledning til KOM and the red test lead to VΩHz.
3. Set the rotary switch to the desired Resistance (Ω) range.
4. Connect the test leads across the component whose resistance is to be measured.
5. Aflæs modstandsværdien på LCD-displayet.

6.5 Measuring DC Current (A=)

CAUTION: Never connect the meter in parallel to a voltage source when measuring current. This can blow the fuse or damage the meter.

1. Sluk for kredsløbet.
2. Tilslut den sorte testledning til KOM. Connect the red test lead to mA for currents up to 500mA, or to 20A MAKS for currents up to 20A.
3. Set the rotary switch to the appropriate DC Current (A=) range.
4. Open the circuit where the current is to be measured and connect the meter in series with the load.
5. Re-energize the circuit and read the current value on the LCD display.

6.6 Measuring Temperature (°C)

1. Connect the K-type thermocouple to the appropriate input jacks (usually VΩHz og KOM, observing polarity if indicated).
2. Set the rotary switch to the Temperature (°C) function.
3. Place the tip of the thermocouple on or near the object whose temperature is to be measured.
4. Read the temperature value on the LCD display.

6.7 Andre funktioner

• Kontinuitetstest: Set the rotary switch to the continuity symbol. A built-in buzzer will sound if the resistance is below a certain threshold.
• Diode test: Set the rotary switch to the diode symbol. Connect the red lead to the anode and black lead to the cathode of the diode. The forward voltage drop vil blive vist.
• Transistor hFE Test: Insert the transistor into the hFE socket on the meter, ensuring correct Emitter, Base, Collector (EBC) orientation for NPN or PNP types. Set the rotary switch to hFE.
• Kapacitans (F): Set the rotary switch to the capacitance range. Connect the leads across the capacitor (ensure it is discharged first).
• Frekvens (Hz): Set the rotary switch to the frequency range. Connect the leads to the signal source.

7. Vedligeholdelse

7.1 Rengøring

Tør måleren af ​​med reklameamp en klud og et mildt rengøringsmiddel. Brug ikke slibemidler eller opløsningsmidler. Hold indgangsterminalerne fri for snavs og fugt.

7.2 Udskiftning af batteri

When the low battery indicator appears on the display, replace the 9V battery as described in Section 5.1. Failure to do so may result in inaccurate readings.

7.3 Udskiftning af sikringer

If the meter fails to measure current, the fuse may be blown. Refer to the specifications for the correct fuse type. To replace the fuse:

1. Ensure the meter is off and all test leads are disconnected.
2. Open the battery compartment cover (and potentially an additional fuse cover, depending on the model).
3. Carefully remove the old fuse and replace it with a new one of the identical type and rating.
4. Securely close all covers.

8. Fejlfinding

9. Specifikationer

10. Garanti og support

For warranty information or technical support regarding your Homely M890G Digital Multimeter, please refer to the documentation provided at the time of purchase or contact your retailer. Keep your purchase receipt as proof of purchase.