EMOS EM391 Digital Multimeter Instruction Manual

1. Mawu Oyamba

This manual provides essential information for the safe and effective operation of your EMOS EM391 Digital Multimeter. Please read it thoroughly before use and retain it for future reference. The EMOS EM391 is designed for general electrical measurements, offering functions such as voltage, current, resistance, diode, and continuity testing.

2. Zambiri Zachitetezo

Always observe the following safety precautions to prevent electric shock or personal injury, and to avoid damage to the multimeter or the equipment under test.

• Ensure the multimeter is set to the correct function and range before making any measurements.
• Osagwiritsa ntchito kuposa voliyumu yovoteratage, as marked on the multimeter, between the terminals or between any terminal and ground. This device is rated CAT III 300V.
• Samalani mukamagwira ntchito ndi voltagndi pamwamba pa 30V AC RMS, 42V pachimake, kapena 60V DC. Voltagndi chiwopsezo chowopsa.
• Always disconnect the test leads from the circuit before changing functions or ranges.
• Yang'anani zitsulo zoyesera kuti muwone ngati zawonongeka kapena chitsulo chowonekera musanagwiritse ntchito. Bwezerani ngati zawonongeka.
• Musagwiritse ntchito multimeter ngati ikuwoneka kuti yawonongeka kapena ngati chikwamacho chili chotseguka.
• Replace the battery as soon as the low battery indicator appears to ensure accurate readings.
• When servicing the multimeter, use only specified replacement parts.

3. Zamalonda Zathaview

The EMOS EM391 is a compact digital multimeter designed for various electrical measurements. It features a clear digital display, a rotary function switch, and input jacks for test leads.

Figure 1: EMOS EM391 Digital Multimeter with its included red and black test leads. The display shows '-1999', indicating a negative reading or an uninitialized state. The rotary switch is set to the 'OFF' position.

Zigawo:

• Chiwonetsero cha LCD: Imasonyeza ziwerengero za muyeso, mayunitsi, ndi zizindikiro.
• Kusintha kwa Rotary: Used to select measurement functions and ranges, and to power the device on/off.
• 'VΩmA' Input Jack: Za voltage, resistance, diode, continuity, and current measurements up to 200mA.
• '10A' Input Jack: For high current measurements up to 10A.
• 'COM' Input Jack: Kuyika kofala (koipa) pamiyezo yonse.

4. Kukhazikitsa

4.1 Kuyika kwa Battery

The EMOS EM391 Multimeter requires a 9V battery for operation. If the display does not light up or shows a low battery indicator, the battery needs to be replaced.

1. Onetsetsani kuti multimeter yazimitsidwa ndipo chotsani ma lead onse oyesera.
2. Pezani chivundikiro cha chipinda cha batri kumbuyo kwa yuniti.
3. Unscrew the retaining screw(s) and carefully remove the cover.
4. Connect a new 9V battery to the battery clips, observing correct polarity.
5. Place the battery inside the compartment and replace the cover, securing it with the screw(s).

4.2 Kulumikiza Zotsogolera Zoyesa

Proper connection of test leads is crucial for accurate and safe measurements.

1. Insert the black test lead into the 'COM' (common) input jack.
2. Pa miyeso yambiri (voltage, resistance, diode, continuity, and current up to 200mA), insert the red test lead into the 'VΩmA' input jack.
3. For high current measurements (up to 10A), insert the red test lead into the '10A' input jack. Always ensure the red lead is in the correct jack for the measurement type.

5. Malangizo Ogwiritsira Ntchito

To begin, turn the rotary switch from 'OFF' to the desired measurement function and range.

5.1 Kuyeza DC Voltage (V=)

1. Connect the red test lead to the 'VΩmA' jack and the black test lead to the 'COM' jack.
2. Ikani chosinthira chozungulira ku DC Vol yomwe mukufunatage (V=) range (e.g., 200mV, 2V, 20V, 200V, 300V). If the voltage is unknown, start with the highest range and decrease as necessary.
3. Connect the test probes across the component or circuit to be measured, observing polarity.
4. Werengani voltagndi mtengo pachiwonetsero cha LCD.

5.2 Kuyeza AC Voltagndi (V~)

1. Connect the red test lead to the 'VΩmA' jack and the black test lead to the 'COM' jack.
2. Ikani switch yozungulira ku AC Vol yomwe mukufunatage (V~) range (e.g., 200V, 300V).
3. Lumikizani ma probe oyesera kudutsa AC voltagndi gwero.
4. Werengani voltagndi mtengo pachiwonetsero cha LCD.

5.3 Measuring DC Current (A=)

Chenjezo: Never connect the multimeter in parallel with a voltage source when measuring current, as this can blow the fuse or damage the meter.

1. For current up to 200mA: Connect the red test lead to the 'VΩmA' jack.
2. For current up to 10A: Connect the red test lead to the '10A' jack.
3. Connect the black test lead to the 'COM' jack.
4. Set the rotary switch to the desired DC Current (A=) range (e.g., 200µA, 2mA, 20mA, 200mA, 10A).
5. Open the circuit where current is to be measured and connect the multimeter in series with the load.
6. Werengani mtengo wapano pa chiwonetsero cha LCD.

5.4 Kuyesa Kukaniza (Ω)

Chenjezo: Onetsetsani kuti dera latsekedwa ndipo ma capacitor onse atulutsidwa musanayese kukana.

1. Connect the red test lead to the 'VΩmA' jack and the black test lead to the 'COM' jack.
2. Set the rotary switch to the desired Resistance (Ω) range (e.g., 200Ω, 2kΩ, 20kΩ, 200kΩ, 2MΩ).
3. Connect the test probes across the resistor or component to be measured.
4. Werengani mtengo wotsutsa pachiwonetsero cha LCD.

Mayeso a 5.5 Diode

1. Connect the red test lead to the 'VΩmA' jack and the black test lead to the 'COM' jack.
2. Set the rotary switch to the Diode Test symbol (→|).
3. Lumikizani chofufutira chofiira ku anode ndi chofufutira chakuda ku cathode ya diode. Chowonetseracho chidzawonetsa vol yamtsogolotage dontho.
4. Bwezerani ma probe. Chowonetseracho chiyenera kuwonetsa 'OL' (Open Loop) kuti chikhale ndi diode yabwino.

5.6 Kupitiliza Kuyesa

1. Connect the red test lead to the 'VΩmA' jack and the black test lead to the 'COM' jack.
2. Set the rotary switch to the Continuity Test symbol ()))).
3. Lumikizani ma probe oyesera kudutsa dera kapena gawo lina.
4. If the resistance is below approximately 50Ω (this value can vary), the built-in beeper will sound, indicating continuity. The display will also show the resistance value.

5.7 Battery Test (1.5V/9V)

This function allows for a quick check of 1.5V and 9V batteries under a light load.

1. Connect the red test lead to the 'VΩmA' jack and the black test lead to the 'COM' jack.
2. Set the rotary switch to the '1.5V/9V' battery test position.
3. Connect the red probe to the positive terminal and the black probe to the negative terminal of the battery.
4. Werengani voltage value on the LCD display. A significantly lower voltage than the nominal value indicates a weak or discharged battery.

6. Kusamalira

6.1 Kusintha kwa Battery

Refer to Section 4.1 for detailed instructions on battery replacement. Always use a fresh 9V battery.

6.2 Kusintha kwa Fuse

If the current measurement function stops working, the fuse may need replacement. The 10A input is protected by a fuse.

1. Ensure the multimeter is turned OFF and all test leads are disconnected.
2. Open the battery compartment cover as described in Section 4.1. The fuse is typically located near the battery.
3. Carefully remove the old fuse.
4. Replace it with a fuse of the exact same type and rating: FUSED 10A Max.
5. Tsekani bwino chivundikirocho.

6.3 Kuyeretsa ndi Kusunga

Pukutani mlanduwu ndi malondaamp cloth and mild detergent. Do not use abrasives or solvents. Store the multimeter in a cool, dry place. If storing for extended periods, remove the battery to prevent leakage.

7. Mavuto

8. Zofotokozera

The following specifications are typical for the EMOS EM391 Digital Multimeter:

• Nambala Yachitsanzo: EM391
• Wopanga: Mtengo wa EMOS
• Mtundu Woyezera: Multimeter
• Gwero la Mphamvu: Batri ya 9V (yosaphatikizidwa)
• Kulemera kwa chinthu: 240 gm
• Makulidwe a Parcel: 20.2 x 12.7 x 3.6 masentimita
• Min. Voltage: 200 millivolts
• Kutentha Kwambiri: 20 digiri Celsius
• Mayeso achitetezo: Mphaka III 300V
• DC Voltagndi Ranges: 200mV, 2V, 20V, 200V, 300V
• AC Voltagndi Ranges: 200V, 300V
• DC Current Ranges: 200µA, 2mA, 20mA, 200mA, 10A
• Magawo Otsutsa: 200Ω, 2kΩ, 20kΩ, 200kΩ, 2MΩ
• Mayeso a Diode: Inde
• Kupitiliza Kuyesa: Yes (with beeper)
• Kuyesa kwa Battery: 1.5V, 9V

Figure 2: Back of the EMOS EM391 Multimeter packaging, displaying various specifications and compliance marks in multiple languages.

9. Chitsimikizo ndi Thandizo

EMOS products are manufactured to high-quality standards. For warranty information or technical support, please refer to the warranty card included with your product or contact EMOS customer service directly. Keep your purchase receipt as proof of purchase.

Manufacturer: EMOS

For further assistance, please visit the official EMOS webwebusayiti kapena funsani wofalitsa wakomweko.