Homely M890G Digital Multimeter User Manual

1. Utangulizi

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. Taarifa za Usalama

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:

• Hakikisha kila wakati mita iko katika utendakazi na masafa sahihi kabla ya kufanya vipimo.
• Usitumie zaidi ya juzuu iliyokadiriwatage, kama ilivyo alama kwenye mita, kati ya vituo au kati ya terminal yoyote na ardhi ya ardhi.
• Tumia tahadhari kali wakati wa kufanya kazi na voltagiko juu ya 60V DC au 30V AC RMS. Jukumu kama hilotaginaleta hatari ya mshtuko.
• Disconnect the test leads from the circuit before changing functions or ranges.
• Usitumie mita ikiwa inaonekana imeharibika au ikiwa insulation kwenye ncha za majaribio imeharibika.
• Remove the test leads from the meter before opening the battery cover or fuse cover.
• Badilisha betri mara tu kiashiria cha betri iliyo chini kinapoonekana ili kuhakikisha usomaji sahihi.
• Usitumie mita katika mazingira ya gesi, mvuke, au vumbi linalolipuka.

3. Yaliyomo kwenye Kifurushi

Verify that all items listed below are present and undamaged:

• Homely M890G Digital Multimeter
• Vidokezo vya Mtihani (moja nyekundu, moja nyeusi)
• K-Type Thermocouple Temperature Probe
• Mwongozo wa Mtumiaji

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. Bidhaa Imeishaview

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

4.1 Mpangilio wa Paneli ya Mbele

Kielelezo 4.1: Mbele ya kina 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.

• Onyesho la LCD: Inaonyesha usomaji wa vipimo, vitengo na viashirio vya utendaji.
• Kubadilisha kwa Mzunguko: Used to select the desired measurement function (e.g., V~, V=, A~, A=, Ω, °C, Hz, F, Diode, hFE).
• Vifungo vya Utendaji: (e.g., HOLD, RANGE, REL, Hz/DUTY, SELECT) for additional features.
• Ingizo Jacks:
  • COM: Kifaa cha kawaida cha risasi nyeusi ya majaribio.
  • VΩHz: Ingizo la juzuutage, resistance, frequency, capacitance, diode, and continuity measurements (red test lead).
  • mA: Ingizo la milliampere current measurements (red test lead).
  • 20A MAX: Input for high current measurements up to 20A (red test lead).

4.2 Rear Features

Kielelezo cha 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.

• Kusimamisha gari: Allows the meter to stand upright for easier viewing.
• Sehemu ya Betri: Located on the rear, secured by screws, for battery replacement.

5. Kuweka

5.1 Ufungaji wa Betri

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

1. Hakikisha kipima-wingi kimezimwa na viashiria vya majaribio vimekatwa.
2. Tafuta kifuniko cha sehemu ya betri nyuma ya mita.
3. Unscrew the retaining screw(s) and carefully remove the cover.
4. Unganisha betri mpya ya 9V kwenye klipu ya betri, ukiona polarity sahihi.
5. Place the battery into the compartment and replace the cover, securing it with the screw(s).

5.2 Kuunganisha Miongozo ya Mtihani

Unganisha kila wakati risasi nyeusi ya majaribio kwenye COM jack. Unganisha risasi nyekundu ya jaribio kwenye jack inayofaa ya kuingiza kulingana na aina ya kipimo:

• Kwa Voltage, Resistance, Capacitance, Frequency, Diode, and Continuity measurements, connect the red lead to the VΩHz jack.
• For current measurements up to 500mA, connect the red lead to the mA jack.
• For current measurements up to 20A, connect the red lead to the 20A MAX jack.

6. Maagizo ya Uendeshaji

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 Washa/Zima

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 Kupima DC Voltage (V=)

1. Unganisha risasi nyeusi kwenye COM na kipimo chekundu kinachoongoza kwa VΩHz.
2. Set the rotary switch to the desired DC Voltage (V=) range. If the voltage is unknown, start with the highest range and decrease as needed.
3. Unganisha vielekezi vya majaribio sambamba na saketi au sehemu inayojaribiwa.
4. Soma juzuu yatage thamani kwenye onyesho la LCD.

6.3 Kupima AC Voltage (V~)

1. Unganisha risasi nyeusi kwenye COM na kipimo chekundu kinachoongoza kwa VΩHz.
2. Set the rotary switch to the desired AC Voltagsafu ya e (V~).
3. Connect the test leads in parallel to the AC source or component.
4. Soma juzuu yatage thamani kwenye onyesho la LCD.

6.4 Upinzani wa Kupima (Ω)

1. Hakikisha saketi imepunguzwa nguvu kabla ya kupima upinzani.
2. Unganisha risasi nyeusi kwenye COM na kipimo chekundu kinachoongoza kwa 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. Soma thamani ya upinzani kwenye onyesho la LCD.

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. Ondoa nguvu kwenye mzunguko.
2. Unganisha risasi nyeusi kwenye COM. Connect the red test lead to mA for currents up to 500mA, or to 20A MAX 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 na COM, observing polarity if indicated).
2. Set the rotary switch to the Temperature (°C) function.
3. Weka ncha ya thermocouple juu au karibu na kitu ambacho joto lake linapaswa kupimwa.
4. Soma thamani ya halijoto kwenye skrini ya LCD.

6.7 Kazi Nyingine

• Mtihani wa Mwendelezo: Set the rotary switch to the continuity symbol. A built-in buzzer will sound if the resistance is below a certain threshold.
• Mtihani wa Diode: 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 tone itaonyeshwa.
• 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.
• Uwezo (F): Set the rotary switch to the capacitance range. Connect the leads across the capacitor (ensure it is discharged first).
• Mara kwa mara (Hz): Set the rotary switch to the frequency range. Connect the leads to the signal source.

7. Matengenezo

7.1 Kusafisha

Futa mita kwa tangazoamp kitambaa na sabuni laini. Usitumie viyeyusho au vimumunyisho. Weka vituo vya kuingiza hewa bila uchafu na unyevu.

7.2 Ubadilishaji wa Betri

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 Uingizwaji wa Fuse

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. Utatuzi wa shida

9. Vipimo

10. Udhamini na Msaada

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.