UNIKS M12 Multifunctional Digital Multimeter User Manual

UNIKS M12 Multifunctional Digital Multimeter User Manual

Statement

According to the Universal Copyright Convention, without permission and written consent, no content of this manual may be reproduced in any form (including storage and retrieval or translation into the languages of other countries or regions). This manual is subject to change in future versions without extra notice.

Caution
The “caution” sign indicates the condition and operation that will cause damage to the instrument or equipment.

It requires that care must be taken when performing this operation. If it is not performed correctly or this operation step is not followed, the instrument or equipment may be damaged. Do not continue to perform any operation indicated by the caution sign unless these conditions are met or fully understood.

Please read the manual carefully and pay attention to the relevant safety warning information before using the instrument.

Summary
This instrument is a compact hand-held 6000 count digital multimeter with high performance and high reliability. It is equipped with overload protection circuit, which can be used to measure AC and DC voltage and current, resistance, diode, circuit connectivity test, non-contact electricity verification and live wire detection. AC voltage is also equipped with VFD low-pass filter, can be used to measure inverter voltage, filter attenuation -0,94dB@1kHz

Safety Instructions

This instrument is designed and produced in strict accordance with the Safety Standard IEC61010, and meets the safety standard of Overvoltage Standard 600V CAT III and Pollution level 2. Please use the instrument as this manual, otherwise the protection function provided by the instrument may be reduced or invalid.

Safety symbol

| Please refer to the instructions for important safety information
---|---
| AC high voltage danger
| Non-recyclable
| The fuse must be replaced according to the designated specification in the manual.

Safe operation specifications

Warning
To avoid possible electric shock or physical injury, please comply with the following specifications:

• Before using the instrument, please read the manual carefully and use the instrument in strict accordance with it, otherwise the protection provided by the instrument may be reduced or invalid.
• Check the shell before using the instrument. Check whether there is crack or plastic part defect. Please carefully check the insulator near the input terminal. If the instrument works abnormally or is damaged, do not use it.
• It is forbidden to touch live conductors whose voltage exceeds 30V RMS AC, 42 V AC peak or 60V DC.
• The instrument should be used according to the specified measurement category, voltage or current rating.
• When the indication of insufficient battery power is displayed, please replace the battery in time to prevent measurement errors.
• Please comply with local and national safety specifications. Wear personal protective equipment(approved rubber gloves, masks, flame retardant clothing, etc.) to prevent injury caused by electric shock and arc when dangerous live conductors are exposed.
• Do not use the HOLD function to measure unknown voltage. After HOLD is turned on, the display screen will not change when different voltages are measured.
• Measure a known voltage to determine whether the instrument operates normally.
• When measuring, the correct function and range gear must be used.
• Do not use the instrument around explosive gas and steam or in humid environment.
• Do not use damaged probes. Check whether the insulation of the probe is damaged, whether there is exposed metal or signs of wear. Check the continuity of the probes.
• When measuring, please connect the neutral wire or ground wire first, and then the live wire; when disconnecting, please cut off the live wire first, and then disconnect the neutral wire and ground wire.
• When measuring, please hold your fingers behind the probe finger protector.
• Please disconnect the probe from the measured object before opening the back cover of the instrument.
• Do not use the instrument in an environment that exceeds the measurement category (CAT) rating of the lowest rated single element in the instrument, probe or accessories.

Instrument instructions

LCD display:
It is with 4 digit 7-segment nixie tube display, 6000 counts, and analog bar indication function.

Key area：

Function selection key：
Function selection key： Briefly press the key to switch gear function, and long press the key for about 2 seconds to turn on or turn off VFD low-pass filter. Attention: VFD low-pass filter only works at AC voltage gear ( ).

Maximum and minimum value key：
Briefly press the key to start the maximum or minimum value measurement, and long press the key for about 2 s

Relative value measurement / Lighting key：
Briefly press the key to turn on or turn off the relative value measurement, and long press the key for about 2 seconds to turn on or turn off the light.

Data retention / LCD backlight key：
Briefly press the key to turn on or turn off the data retention display, and long press the key for about 2 seconds to turn on or turn off the LCD backlight.

Input jack area：

jack：
The positive input terminal of 10A current measurement (connected with the red prob

jack：
Common input terminal for voltage, resistance, diode, capacitance, connectivity and current measurement (connected with the black probe).

jack：
Positive input terminal for voltage, resistance, diode, capacitance, connectivity, live wire detection, current measurement within 600mA (connected with the red probe).

NCV sensing area
It is used for non-contact voltage verification.

Function rotary switch:
It is used to select the measurement funct

LCD symbol instructions

Measurement instructions

Precautions before operation:

1.  Turn on the power and check whether the battery is under voltage. If ” ” is displayed on the screen, you need to replace the battery before operation. If not, please follow the steps below.
2. The “ ****” warning symbol next to the jack of the measurement probe indicates that the input voltage or current should not exceed the indicated value, which is to protect the internal circuit of the instrument from damage.
3. The instrument hasthe function of automatic shutdown, that is, the display shows ” ” and it willshut down automatically about
4. minutes after no operation. Cancel the automatic shutdown function: press and hold the “ ” key to start the machine, after hearing the beep sound for about 5 times, release the key, and the ”  ” is not displayed on the display screen, which can prevent the instrument from entering the sleep state during the measurementprocess.
5. The backlight function turns off automatically after about 15 seconds.
6. The lighting function will turn off automatically about 15 seconds after it is turned on.

ACvoltage measurement

1. Insert the red probe into the ” ” jack and the black probe into the jack.
2. Turn the knob switch to the “ ” position, and connectthe probe to the powersupply or load to be measured, and the measured value will be displayed on the screen.
3. Press ”  ” key to switch frequency and duty ratio, and long press it to turn on or turn off VFD function.

Attention：

1. Before turning the function rotary switch, leave the measurement probe from the circuit under measurement.
2. When the screen only displays “OL”, it means that the range has been exceeded and the measurement should be terminated.
3. Do not input AC voltage with effective value higher than 600V, otherwise there is a risk of damaging the instrument.
4. Pay special attention to avoid electric shock when measuring high voltage.

DC voltage measurement

1. Insert the red probe into the “ ” jack and the black probe into the jack.
2. Turn the knob switch to the ” ” position,and connectthe probe to the power supply or load to be measured. The polarity and measured value of the contact terminal of the red probe will be displayed on the screen.

Attention：

1. Before turning the function rotary switch, leave the measurement probe from the circuit under measurement.
2. When the screen only displays “OL”, it means that the range has been exceeded and the measurement should be terminated.
3. Do not input AC voltage with effective value higher than 600V, otherwise there is a risk of damaging the instrument.
4. Pay special attention to avoid electric shock when measuring high voltage.

mV voltage measurement’

1. Insert the red probe into the ” ” jack and the black probe into the jack.
2. Turn the knob switch to the “ ” position, and connect the probe to the power supply or load to be measured. The polarity and measured value of the contact terminal of the red probe will be displayed on the screen.
3. Press the **** key to switch DC voltage, AC voltage and frequency measurement.

Attention：

1. Before turning the function rotary switch, leave the measurement probe from the circuit under measurement.
2. When the screen only displays “OL”, it means that the range has been exceeded and the measurement should be terminated.
3. Do not input AC voltage with effective value higher than 600V, otherwise there is a risk of damaging the instrument.
4. Pay special attention to avoid electric shock when measuring high voltage.

4Resistance/Continuity/diode/capacitance measurement

1. Insert the red probe into the ” ” jack and the black probe into the jack.
2. Turn the knob switch to the “ ” position and press the **** key to switch the measurement of resistance, connectivity, diode and capacitance.
3. Connect the probe to the measured object and read the measurement result from the display.

Attention：

1. Before turning the function rotary switch, leave the measurement probe from the circuit under measurement.
2. When the screen only displays “OL”, it means that the range has been exceeded and the measurement should be terminated.
3. Do not input AC voltage with effective value higher than 600V, otherwise there is a risk of damaging the instrument.
4. When measuring large capacitance, discharge the capacitance before measuring.

5Non-contact electricity verification (NCV) / Live wire detection (Live)

1. Turn the knob switch to the “ ” position and press the **** key to switch NCV or Live function.
2. Under the NCV function, place the NCV sensing area close to the wire to be measured. When the AC voltage is detected, the buzzer will make an intermittent sound, which varies with the intensity of the induced voltage. Meanwhile, the number of ” **** ” is displayed on the display screen. The more the number, the stronger the induced signal.
3. Under the Live function, insert the red probe into the “ “jack, and the black probe is not connected. Connect the red probe to the cable to be measured. When the detected electric AC voltage is greater than about 36V, the buzzer will emit intermittent sound, which varies with the intensity of the induced voltage. Meanwhile, the number of “ ****” is displayed on the display screen. The more the number, the stronger the induced signal.

Note: NCV mode can also connect the probe in Live mode to judge the live wire, but the sensitivity will be higher than that in Live mode.

Warning：

1. Measurement range: about 36V~600V, 50Hz or 60Hz.

2. When using, even if there is no sound or display prompt, the wire to be measured may still have voltage. The instrument may be affected by other factors (such as shielded wires and cables, thickness of insulation layer, distance from voltage source, diversity in socket design, etc.), and fail to sense the electric field.

3. When judging the live wire, do not put your fingers or conductors into the COM jack, otherwise there may be a risk of electric shock.
   Frequency / Duty ratio

4. Insert the red probe into the ” ” jack and the black probe into the jack.

5. Turn the knob switch to the ” ” position and press the **** key to switch the frequency or duty ratio.

6. Connect the measurement probe to the load or the measured

7. terminal and read the value from the display screen.

Warning

1. Before turning the function rotary switch, leave the measurement Probe from the circuit under measurement.
2. Do not input a voltage with an effective value higher than 600V, otherwise there is a risk of damaging the instrument.

uA current

1. Insert the red probe into the ” ” jack and the black probe into the jack.
2. Turn the knob switch to the ” ” position and press the **** key to switch the AC current, DC current or frequency measurement.
3. Connect the measurement probe in series to the load, and the polarity of the red probe connection will be displayed when the current value is displayed.

Warning：

1. Before turning the function rotary switch, leave the measurement probe from the circuit under measurement.
2. When the screen only displays “OL”, it means that the range has been exceeded and a higher gear range should be switched for measurement.
3. Do not input a voltage with an effective value higher than 600V, otherwise there is a risk of damaging the instrument.
4. Do not input a current with an effective value higher than 600uA, otherwise there is a risk of damaging the instrument.

mA current

1. Insert the red probe into the “ ” jack and the black probe into the jack.
2. Turn the knob switch to the “ ” position and press the **** key to switch the AC current, DC current or frequency measurement.
3. Connect the measurement probe in series to the load, and the polarity of the red probe connection will be displayed when the current value is displayed.

Warning：

1. Before turning the function rotary switch, leave the measurement probe from the circuit under measurement.
2. When the screen only displays “OL”, it means that the range has been exceeded and a higher gear range should be switched for measurement.
3. Do not input a voltage with an effective value higher than 600V, otherwise there is a risk of damaging the instrument.
4. Do not input a current with an effective value higher than 600uA, otherwise there is a risk of damaging the instrument.

10A current

1. Insert the red probe into the ” ” jack and the black probe into the jack.
2. Turn the knob switch to the ” ” position and press the **** key
3. to switch the AC current, DC current or frequency measurement.
4. Connect the measurement probe in series to the load, and the polarity of the red probe connection will be displayed when the current value is displayed.

Warning：

1. Before turning the function rotary switch, leave the measurement probe from the circuit under measurement.
2. When the screen only displays “OL”, it means that the range has been exceeded and the measurement shall be terminated.
3. Do not input a voltage with an effective value higher than 600V, otherwise there is a risk of damaging the instrument.
4. Do not input a current with an effective value higher than 600uA, otherwise there is a risk of damaging the instrument.

General technical index

not considered).
Temperature and humidity of storage environment:| -10~60 ℃ (<70% RH, remove the battery).
Temperature coefficient:| 0.1accuracy / ℃.
The maximum allowable voltage between the measuring terminal and theground| 600V DC or AC RMS.
Sampling rate:| about 3 times / second
Automatic  shutdown| about  10   minutes.
6000 Display:| the maximum displayed value is 6000
Range exceeding indication:| “OL” is displayed.
Battery low voltage indication:| when the battery voltage is lower than the normal workingvoltage, the ”             ” will be displayed on the LCD.
Input  polarity   indication:| the “-”  symbol  isautomatically display
Battery:| DC 1.5V AAA × 2
Overall dimension:| 166mm×78mm×64mm
Weight:| about 268g

Accuracy index

Accuracy: ( reading + digit ),warranty period of 1 year. Reference conditions: the ambient temperature is 18 ℃ to 28 ℃, and the relative humidity is not greater than 80%.

AC voltage

Maximum allowable measurement voltage: 600V (RMS)
Frequency range:40Hz~1000Hz
DC voltage

600V Maximum allowable measurement voltage: 600V

Resistance

Over voltage protection: 600V DC or AC RMS
Diode and connectivity

aboutmore than 2V
Connectivity| The conductive resistance is about less than 30 Ω, and the buzzer sounds continuously.| **** The circuit voltage is less than 1V

Capacitance

Over voltage protection: 600V DC or AC RMS
Frequen

Minimum input voltage: 200mV (RMS) Over
voltage protection: 600V DC or AC RMS

Duty ratio

Minimum input voltage: 200mV (RMS) Over voltage protection: 600V DC or AC RMS
AC Current

• Maximum input current of mA jack: 600mA（ RMS）
• Maximum input current of 10A jack：10A（ RMS）
• Frequency range: 40Hz~1000Hz

DC current

Maximum input current of mA jack: 600mA Maximum input current of 10A jack：10A

Instrument maintenance

This section provides basic maintenance information, including instructions for replacing fuse tubes and batteries. Unless you are an experienced maintenance technician and have relevant calibration, performance test and maintenance data, do not try to repair this instrumen

Warning：
To prevent possible electric shock, fire or physical inj

• When the shell is opened, do not use the instrument for any measurement operation.
• Remove the input signal before cleaning the instrument.
• Designated replacement parts should be used. Please have the instrument repaired by an approved technician.

General maintenance
Regularly use wet cloth and a small amount of detergent to clean the instrument shell. Do not use abrasive or chemical solvents.

Replacement of the battery and fuse tube

Warning：

• In order to avoid electric shock or physical injury caused by wrong readings, the battery should be replaced in time when the ” ” symbol appears on the instrument display screen.
• In order to ensure the safe operation and maintenance of the product, please take out the battery when the instrument is not used for a long time to avoid damaging the product by the battery leakage.
• Only fuses with specified amperage, fusing rating, voltage rating and fusing speed can be used.
• To avoid electric shock or physical injury, before opening the back cover to replace the battery, shut down the instrument and check to ensure that the probe has been disconnected from the measuring circuit.

Please replace the battery as the following steps:

1. Turn off the powersupply of the instrument.
2. Disconnect the probe from the measured circuit.
3. Loosen the screws fixing the battery cover with a screwdriver and remove the battery cover.
4. Remove the battery and replace it with a new one. Pay attention to the positive and negative polarity of the battery.
5. Install the battery cover and tighten the screws.

Please replace the battery as the following steps:

1. Turn off the power supply of the instrument.
2. Disconnect the probe from the measured circuit and remove the protective leather case.
3. Loosen the screws fixing the back cover with a screwdriver and remove the back cover.
4. Remove the damaged fuse tube and replace it with a new one.
5. Install the back cover, tighten the screws, and install the leather cover
   

Attention：
600mA fuse tube：600mA/600V；
10A fuse tube：10A/600V；

Warning
The fuse tube should be replaced with the same specification and parameters, and it is strictly forbidden to use the fuse tube with different specifications and parameters, otherwise there will be a risk of damaging the instrument.

WARRANTY CONDITIONS

This instrument is warranted against defects in materials and workmanship, in accordance with the general terms and conditions. During the warranty period, defective parts can be replaced, but the manufacturer reserves the right to repair or replace the product. If the instrument is to be returned to the after – sales service or to a dealer transportation is borne by the customer. The shipment must, however, be agreed. Attached to dispatch an explanatory note about the reasons of the instrument must always be inserted. For shipping only use the original packaging. Any damage caused by the use of non-original packing shall be charged to the customer. The manufacturer accepts no responsibility for damage caused to people or objects.

The warranty does not apply in the following cases:

• Repair and / or replacement of accessories and battery (not covered by warranty).
• Repairs made necessary because of a misuse of the instrument or of its use with no compatible devices.
• Repairs made necessary due to improper packaging.
• Repairs made necessary due to work carried out by unauthorized personnel.
• Modification of the instrument without the explicit permission of the manufacturer.
• Use not provided for in the specifications of the instrument or in the instruction manual.

The content of this manual may not be reproduced in any form without the permission of the manufacturer.

Our products are patented and their trademarks. The manufacturer reserves the right to change specifications and prices if this is due to technological improvements.

ASSISTANCE

If the instrument does not operate properly, before contacting the Customer Service, check the status of the battery and wear of the cables and replace them if necessary.

If the instrument continues to manifest malfunctions check if the procedure of use of the same is in accordance with what is indicated in this manual. If the instrument is to be returned to the after – sales service or to a dealer transportation is borne by the customer.

The shipment must, however, be agreed. Attached to dispatch an explanatory note about the reasons of the instrument must always be inserted. For shipping only use the original packaging; any damage caused by the use of non-original packing shall be charged to the customer.

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https://www.uniks.it
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Via Vittori 57
48018 Faenza (RA), Italy
0546.623002
0546.623691

References

• UNIKS

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