MASTECH MS2109A AC/DC Clamp Meter User Manual

MS2109A
AC/DC Clamp Meter User Manual

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Safety Information

Warning
Please particularly note that Inappropriate use may cause shock or damage to the meter. When using the meter, comply with common safety procedures and completely follow the safety measures in this operation manual. To make full use of the meter’s functions and ensure safe operation, please carefully read and follow the procedures in the operation manual.

This meter is designed and manufactured according to safety requirements of EN 61010-1, EN 61010-2-032, EN 61010-2-033 concerning electronic measuring instruments with a measurement  CAT III 600V and pollution degree 2 and safety requirements for hand-held clamps for electrical measurement and test.  With proper use and care, this digital multimeter will give you years of satisfactory service.

Preparation

1.1.1 When using the meter, the user should comply with standard safety rules:
– General shock protection
– Prevent misusing the meter
1.1.2 After receiving the meter, please check for damage that may have occurred during transportation.
1.1.3 If the meter is stored and shipped under hard conditions, please confirm that the meter is undamaged.
1.1.4 Probe should be in good condition. Before use, please check whether the probe insulation is damaged, whether the metal wire is bare. 1.1.5 Use the probe table provided with the meter to ensure safety. If necessary, replace the probe with another identical probe or one with the same specification.

Usage

1.2.1 When using the meter, select the right function and measuring range.
1.2.2 Don’t measure when exceeding the maximum value in each measuring range.
1.2.3 When measuring a circuit with the meter connected. do not touch the probe tip (metal part).
1.2.4 When measuring, if the voltage to be measured is more than 60 V DC or 30 VAC (RMS), always keep your fingers behind the finger protection device.
1.2.5 Do not measure voltage greater than AC 600V.
1.2.6 In the manual measuring range, when the value to be measured is not known in advance, choose the highest measuring range to begin, and then gradually select lower ranges until the correct range is identified. 1.2.7 Before rotating the conversion switch to change the measuring function, remove the probe from the circuit to be measured.
1.2.8 Don’t measure resistors, capacitors, diodes, and circuits that are energized.
1.2.9 During the test of current, resistors, capacitors, diodes, and circuit connections, do not allow the meter to connect with a voltage source.
1.2.10 Don’t measure capacitance unless the capacitor is discharged completely.
1.2.11 Don’t use the meter in explosive gas, vapor, or dusty environments.
1.2.12 If you find any abnormal condition or failure on the meter, stop using the meter and have it serviced by a qualified technician.
1.2.13 Unless the meter bottom case and the battery cover are completely fastened in their original places, do not use the meter.
1.2.14 Don’t store or use the meter in direct sunlight, high temperature, or high humidity.

1.3 Part name

| Note-Important safety information, refer to the instruction manual.
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| Application around and removal from UNINSULATED HAZARDOUS LIVE conductors is permitted.
| Caution, the possibility of electric shock
| Equipment protected throughout by double insulation or reinforced insulation.
| Conforms to UL STD. 61010-1, 61010-2-032, 61010-2-033; Certified to CSA STD C22.2 NO.
61010-1, IEC 61010-2-032,61010-2-033
| Complies with European (EU) safety standards
| Earth (ground) TERMINAL
| Direct current
| Alternating current

CAT III: MEASUREMENT CATEGORY III is applicable to test and measure circuits connected to the distribution part of the building’s low-voltage MAINS installation.

Maintenance

1.4.1 Don’t try to open the meter bottom case to adjust or repair. Such operations only can be made by qualified technicians who fully understand the meter and electrical shock hazard.
1.4.2 Before opening the meter bottom case or battery cover, remove the probe from the circuit to be measured.
1.4.3 To avoid wrong readings and potential electric shock, when “ ”appears on the meter display, replace the battery immediately.
1.4.4 Clean the meter with a damp cloth and mild detergent. Do not use abrasives or solvents.
1.4.5 Power off the meter when it is not used. Switch the transfer switch to the OFF position.
1.4.6 If the meter is not used for a long time, please take the battery out to prevent the meter being damaged.

Description

– The meter is a portable, professional measuring instrument with an LCD display and backlight for easy reading by users. The measuring range switch is operated by a single hand for easy operation. The meter has overload protection and a low battery indicator. It is an ideal multifunction meter for professionals, factories, schools, fans, and family use.
– The meter is used to measure AC current, DC current,  voltage, DC voltage, frequency, duty ratio, resistance, capacitance, circuit connections, diodes, non-contact voltages, and temperatures.
– The meter has an auto-measuring range function.
–  The meter has a reading hold function.
– The meter has a max. measuring function.
– The meter has a min. measuring function.
– The meter has a clamp head frequency measurement function.
– The meter has an auto power-off function.
– The meter has a relative measuring function.

Part name

(1) Current clamp head: used for current measurement.
(2) NCV indicator
(3) Key (4) LCD display
(5) Common end jack
(6) Resistance, capacitance, voltage, frequency, diode, continuity, and temperature input jack
(7) Knob
(8) Clamp head center position
(9) NCV sense position

2.2 Switch, Button, and Input Jack Description
B.L/HOLD button: used for reading hold or backlight control
MAX/MIN button: used for maximum/minimum measurement function switch.
SEL button: used for measuring function switch.
NCV button: Non-contact voltage detection switch.
REL button: used for entering relative measurement state.
Hz/% button: used for frequency and duty ratio measurement function switch.
OFF position: used for shutting off the power.
INPUT jack: voltage, resistance, frequency, duty ratio, capacitance, diode, circuit connection, temperature measurement input wire connecting terminal. COM jack: voltage, resistance, frequency, duty ratio, capacitance, diode, circuit connection, temperature measurement common wire connecting terminal. Transfer switch: used for selecting a function and measuring range.

LCD Display

| ALTERNATING CURRENT, direct current
---|---
| Diode, continuity

AUTO

| Automatic measuring range mode

MAX

| Maximum measurement state

MIN

| Minimum measurement state

REL

| Relative measurement mode
| Automatic power-off state
| LOW BATTERY

H

| Reading hold state

%

| Percentage (duty ratio)

mV, V

| Millivolt, Volt (voltage)

A

| Amperes (Current)

nF, μF

| Nanofarad, Microfarad

Ω,kΩ, MΩ

| Ohm, Kilohm, Megohm (resistance)

Hz,kHz, MHZ

| Hertz, Kilohertz, Megahertz (frequency)

°C,°F

| Celsius degree, Fahrenheit degree (temperature)

Specifications

At least once a year, the meter should be recalibrated in temperatures of 18°C — 28°C and relative humidity less than 75%.
3.1 General
Auto measuring range. Full measuring range overload protection. The maximum allowable voltage between measurement end and ground: 600V DC or 600V AC Operational height: maximum 2000m Display: LCD Displayed maximum value: 5999 digits. Polarity indication: automatic indication, ‘-‘ means negative polarity. Exceeding measuring range display: ‘OL’ or ‘-OL’. Sampling rate: about 3 times/s, simulation bar 30 times/s. Unit display: has function and power unit display. Auto-off time: 15 min Power supply: 3x 1.5V AAA batteries Battery Undervoltage indication: LCD displays C symbol. Temperature coefficient: less than 0.1 x accuracy°C Operating temperature: 18°C-28°C. Storage temperature: -10°C-50°C Dimension: 218x78x35mm Weight: 239g

3.2 Technical Indicators
Environment temperature: 23±5°C, relative humidity (RH): <75%

3.2.1 AC Current

Measuring range

| Resolution|

Accuracy

---|---|---

60A

|

0.01A

| +(2.5% of reading + 6 digits)

600A

|

0.1A

• Maximum input current: 600AAC
• Frequency range: 40-400Hz

Measuring range

| Resolution|

Accuracy

---|---|---

60A

|

0.01A

| +(3.0% of reading + 6 digits)

600A

|

0.1A

• Maximum input current: 600A DC

2.3 DC Voltage

Measuring range| Resolution|

Accuracy

---|---|---

600mV

|

0.1mV

|

±(0.7% of reading + 2digits)

6V

|

0.001V

60V

|

0.01V

600V

|

0.1V

• Input impedance: 10M0
• Maximum input voltage: 600V AC (RMS) or 600V DC

Note:

In the small voltage measuring range, the probe is not connected with the circuit to be tested, and the meter may have fluctuating readings. This is normal and caused by the meter’s high sensitivity. It does not affect actual measurement results.

3.2.4 AC Voltage

Measuring range

| Resolution|

Accuracy

---|---|---

6V

|

0.001V

|
60V|

0.01V

| ±(0.8% of reading + 3 digits)
600V|

0.1V

|

600V

|

1V

|

±(1.0% of reading + 4 digits)

Input impedance: 10MD
Maximum input voltage: 600V AC (RMS) or 600V DC Frequency range: 40 – 400Hz

3.2.5 Frequency

3.2.5.1Clamp head measuring frequency (through grade A):

Measuring range

| Resolution| Accuracy
---|---|---

99.99Hz

|

0.01KHz

|

± (1.5% of reading + 5 digits)

999.9Hz|

0.1KHz

– Measuring scope: 40Hz – 1kHz
– The input signal range: 3 6AAC (RMS) (input current will increase when the frequency to be measured Increases)
– Maximum input current: AC 600A (RMS)

3.2.5.2 Through grade V:

Measuring range

| Resolution|

Accuracy

---|---|---
99.99Hz| 0.01Hz|  t(1.5% of reading + 5 digits)
999.9Hz| 0.1Hz
9.999kHz| 0.001KHz

– Measuring scope: 40Hz – 10kHz
– The input voltage range: 3 600mV AC (RMS) (input voltage will increase when the frequency to be measured increases)
– Input impedance: 10MD
– Maximum input voltage: 600V AC (RMS)

3.2.5.3 Through grade HZ/DUTY:

Measuring range

| Resolution|

Accuracy

---|---|---
9.999Hz| 0.001Hz|
99.99Hz| 0.01Hz|
999.9Hz| 0.1Hz|
9.999KHz| 0.001 KHz| *(0.5% of reading + 3 digits)
99.99KHz| 0.01KHz|
999.9KHz| 0.1KHz|
9.999MHz| 0.001MHz|

– Overload protection: 250V DC or AC (RMS)
– The input voltage range: 3 2V (input voltage will increase when the frequency to be measured increases)

3.2.6 Duty Ratio

Measuring range

| Resolution|

Accuracy

---|---|---
0.1%-99.9%| 0.1%| ±(3%+5)

3.2.6.1Through gade A (from clamp head): Frequency response: 40- 1kHz
Input current range: 06AAC (RMS) Maximum input current: AC 600A 3.2.6.2 Through grade V:
– Frequency response: 40 – 10kHz – Input voltage range:” 600mV AC – Input impedance: 10M0
– Maximum input voltage: 600V AC (RMS) 3.2.6.2 Through grade HZ/DUTY:
– Frequency response: 1 – 10MHz
– The input voltage range:.>2V AC (RMS) (input voltage will increase when the frequency to be measured increases)
– Maximum input voltage: 250V AC (RMS)

3.2.7 Resistance

– Open circuit voltage: about 0.4V
– Overload protection: 250V DC or AC (RMS)

3.2.8 Circuit Continuity Test

Measuring range

| Resolution|

Function

---|---|---
|

0.1Ω

| If the resistance of the circuit to be measured is less than 500, the meter’s built-in buzzer may sound.

– Overload protection: 250V DC or AC (RMS)

3.2.9 Capacitance

Measuring range

| Resolution|

Accuracy

---|---|---
40nF| 0.01nF| ±(4.0% of reading + 5 digits)
400nF| 0.1nF
4pF| 0.001pF
40pF| 0.01pF
400pF| 0.1pF
4000pF| 0.001mF

– Overload protection: 250V DC or AC (RMS)

3.2.10 Diode Test

Measuring range

| Resolution|

Function

---|---|---

|

0.001V

| Display approximate diode forward voltage value

– Forward DC current is about 1 mA
– Backward DC voltage is about 2.7V
– Overload protection: 250V DC or AC (RMS)

Measuring range

| Resolution|

Accuracy

---|---|---
-20°C-0°C| 1°C| +(3.0% of reading + +4 digits)
1 °C-400°C| ±(1 .0% of reading + +3 digits)
401°C-1000°C| ±2.0% of reading

– Temperature indicator does not include thermocouple error.
– Overload protection: 250V DC or AC (RMS)

Operating Guidance

4.1 Reading Hold

1. In the process of measurement if the reading hold is required, press the “HOLD/B.L” key. The display value in the display will be locked. Press the “HOLD/B.L” key again to release the reading hold.
   4.2 NCV Key
   NCV key is used for non-contact voltage detection. Press this key and hold it. Place the NCV sensor zone close to the conductor to be detected. If the voltage is more than AC 90V, the NCV indicator will flash and the buzzer will sound at regular intervals.
   4.3 Frequency/Duty Ratio Switch
2. When the meter is in AC voltage, AC current position if the “Hz/To” button is pressed, the meter will measure AC voltage and AC current signal frequency. Click the “Hz/%” button again, and the meter will measure voltage and current signal duty ratio. If it is in the HZ/DUTY position, pressing the HZ % key will switch between HZ and DUTY.
3. If “Hz/%” button is pressed again, the meter will revert to voltage, current measurement state.
   Note: When the meter is in the maximum/minimum value measurement state, it can’t be switched to frequency. duty ratio measurement mode.
   4.4 Maximum/Minimum Measurement Choice
4. Press the “MAX/MIN” key to enter MAX mode, and always store the measurement maximum value. Press the “MAX/MIN” key again, and the meter will enter a minimum value measurement state. Press the “MAX/MIN” key for the third time, and the meter will display the difference of maximum and minimum values. Press the “MAX/MIN” key to cycle through the above operations.
   2)After entering MAX or MIN mode, the meter will automatically save the measured maximum or minimum value.
5. If the user presses the “MAX/MIN” key for more than 2 sec, the meter will restore the normal measuring range.
   Note:
6. When the meter is in the maximum/minimum value measurement state, it is manual measuring range mode.
7. When the meter is in the frequency, duty ratio measurement state, it can’t be switched to maximum/minimum value measurement mode.
8. When the meter is in the maximum/minimum value measurement state, SEL, REL key is invalid.
   4.5 Function Switch
9. In the resistance mode, pressing the “SEC button will switch among resistance, diode, continuity, and capacitance detection.
10. In the voltage and current mode, pressing the “SEC key will switch between AC and DC.
11. In the temperature mode, pressing the “SEL” key will switch between Celsius degree and Fahrenheit degree.
    4.6 REL Measurement
12. REL key is the relative value measurement button. When the user taps this button, it will enter relative value measurement mode. The current display value can be stored in the memory as a reference value. When the user measures later, the display value is the difference for input value minus reference value. ie. RELA(current reading) Input value – Reference value.
13. The relative value measurement can only be performed in the manual measuring mode.
    4.7 Back Light And Clamp Head Light
14. In the process of measurement if ambient light is too dark to read, press the “B.L/HOLD” key for more than 2 seconds to turn on the backlight. The backlight will automatically turn off in about 10 seconds.
15. During this period, pressing the “B.L/ HOLD” key for more than two seconds will turn off the backlight.
16. In the current measuring mode, the meter will turn on the backlight. At the same time, it will turn on the clamp headlight. Backlight luminophores are LED with a high current draw. If a backlight is used often, it will shorten battery life. Therefore, use the backlight only when necessary.
    Note:
    When the battery voltage is 43.6V, LCD displays the “ ” (Undervoltage) symbol. But when the user uses the backlight, when the battery voltage frequency is )3.6V, battery voltage drops due to its high working current, “ ” symbol may display. (When the “ ” symbol shows, it does not guarantee the accuracy of measurement). At this time, don’t replace the battery. Use the meter normally without using a backlight, and wait to replace the battery when the “I=1” symbol is displayed.
    4.8 Automatic Power-Off
17. If there is no operation for 15 minutes after turning the machine on, the meter will automatically power off to save electricity. Within 1 minute before the shutdown, the buzzer will sound five times. Just before powering off, the buzzer will make a long sound.
    2)After automatic power-off, press any key to restore the meter to ready status.
18. Holding the “SEL” key when powering on will cancel the automatic power-off function.
    4.9 Measurement Preparation
19. Turn the transfer switch to turn on the power. When the battery voltage is low (about <3.6V), the LCD displays the “ ” symbol, replacing the battery.
20. “ ” symbol means that input voltage or current should not be more than instruction value, which is to protect the internal line from damage.
21. Place transfer switch to required measuring function and range.
22. When connecting the line, please connect the common test line first, then connect charged test line. When removing the line, remove charged test line first.

4.10 Current Measurement
Warning
Electric shock hazard.
Remove the probe from the meter before measuring with the current clamp.

1. When the measuring switch is placed to position A. the meter is in AC current measurement state. Choose the appropriate measuring range. If you can’t determine the size of current to be tested, choose the maximum measuring range, then choose lower ranges until the correct range is displayed. If you want to measure DC current, press the SEL key to enter DC current measurement state.
2. Hold the trigger, open the clamp head, and clip one lead of measurement circuit to be tested into the clamp.
3. Read the duty ratio value on the LCD display.
   Note:
   1) Clamping two or more leads of circuits to be tested simultaneously will give invalid readings.
4. To get accurate readings, place the lead to be tested at the center of the clamp head.
5. “ ” indicates that maximum input AC current is 600 A.
6. To improve measurement precision, in the DC current measurement state, because the earth and other magnetic fields have an impact on DC current measurement precision if the LCD display is not zero, place the clamp head vertical to conductor to be measured, then press REL back to zero, then measure.

Voltage Measurement

Warning
Electric shock hazard.
Pay special attention to avoid shock when measuring high voltage. Don’t input voltage more than AC 600 V RMS.

1. Insert black probe to COM jack, insert red probe o INPUT jack, choose appropriate measuring range.
2. Place transfer switch in voltage position V= At this time, the meter is DC voltage measurement state. To measure AC voltage, press the SEL key to enter the AC voltage measurement state.
3. Connect the probe with the voltage source or both ends of load in parallel.
4. Read the voltage on the LCD.
   Note:
   1. In the small voltage measuring range, the probe is not connected with the circuit to be tested, and the meter may have fluctuating readings. This is normal and is caused by the meter’s high sensitivity. When the meter is connected with the circuit to be tested, you will get the actual measured value.
   2. “ ” ZiYindicates that maximum input voltage is 600V AC or 600V DC.
   3. If the reading measured by the meter is more than 750VAC or 1000V DC, it will send out a “beep” alarm.
   4.12 Frequency And Duty Ratio Measurement
5. Clamp head measuring frequency (through grade current): its
   Warning
   Electric shock hazard.
   Remove the probe from the meter before measuring with the current clamp.
   (1) Place measuring switch position A. Choose appropriate measuring range.
   (2) Hold the trigger, open clamp head, clip one lead of measurement circuit to be tested in the clamp.
   (3) Press the “Hz/%” key to switch to the frequency measuring state.
   (4) Read the current value on the LCD display.
   (5) Pressing “Hz/%” again can enter duty ratio measuring state.
   (6) Read the current value on the LCD display.
   Note:
   (1) Clamping two or more leads of the circuit to be tested simultaneously will give invalid readings
   (2) Frequency measurement range is 40Hz-1kHz If the frequency to be tested is less than 40Hz, measuring frequency higher than 10 kHz is possible, but accuracy is not guaranteed
   (3) Duty ratio measuring range is 10-95%.
   (4) “ ” means that the maximum input current is 600A AC (RMS).
   2) Through grade voltage:
   Warning
   Electric shock hazard.
   Pay special attention to avoid shock when measuring high voltage. Don’t input voltage more than AC 600V RMS.
   (1) Insert black probe to COM jack, insert red probe to the INPUT jack.
   (2) Place transfer switch to yr., position, press SEL to enter AC voltage measurement state.
   (3) Press the “Hz/%” key to switch to frequency measuring state.
   (4) Connect the probe with signal or both ends of load in parallel
   (5) Read on the LCD. (6) Pressing “Hz/%” again to enter duty ratio measuring state and read data on the LCD.
   Note:
   (1) Frequency measurement range is 10Hz – 1kHz If the frequency to be tested is less than 10Hz, LCD will show -00.0-measuring frequency higher than 10 kHz is possible, but its accuracy is not guaranteed
   (2) Duty ratio measuring range is 10 – 95%.
   (3) “ ” means that the maximum input voltage is 600V AC (RMS).
   3) Through grade HZ/DUTY:
   Warning
   Electric shock hazard.
   Pay special attention to avoid shock when measuring high voltage. Don’t input voltage more than AC 250V RMS.
   (1) Insert black probe to COM jack, insert red probe to the INPUT jack.
   (2) Place transfer switch in position HZ.
   (3) Connect the probe with signal or both ends of load in parallel.
   (4) Read on the LCD.
   (5) Press “Hz/%” again to enter the duty ratio measuring state.
   Note :
   The frequency measurement range is 1 Hz-10 MHz. If the frequency to be measured is less than 1 Hz, the LCD will display “00.0”. 4.13 Resistance Test
   Warning
   Electric shock hazard.
   When measuring circuit impedance, determine that the power supply is disconnected and the capacitor in the circuit is completely discharged.
6. Insert black probe to COM jack, insert red probe to the INPUT jack.
7. Place measuring range switch tome position. At times, the meter is in the measurement state.
8. Connect the probe to both ends of the resistor or circuit to be tested.
9. LCD will show readings.
   Note:
10. When the input end is open, LCD shows “Or over-range state.
11. When the resistance to be tested is >1 MO, the meter reading will stabilize after a few seconds, which is normal for high resistance readings.
    4.14 Diode Test
12. Insert black probe to COM jack, insert red probe to the INPUT jack.
13. Place measuring switch in-or position.
14. Press the “SEL” button to switch to measuring state.
15. Connect the red probe to the diode anode and connect the black probe to the diode cathode to make the test.
16. Readings will display on the LCD.
    Note:
17. What the meter shows is an approximation of diode forward voltage drop.
18. If the probe has a reverse connection or the probe is open, the LCD will show -OL”.
    4.15 Circuit Continuity Test
    Warning
    Electric shock hazard.
    When measuring circuit continuity, determine that the power supply is disconnected and the capacitor in the circuit is completely discharged.
19. Insert black probe to COM jack, insert red probe to the INPUT jack.
20. Measuring switch is placed to position.
21. Press “SEL” key to switch tool)) circuit continuity measuring state.
22. Connect the probe to both ends of the circuit to be tested.
23. If the resistance of the circuit to be measured is less than 700, the meter’s built-in buzzer may sound.
24. Read the circuit resistance value on the LCD.
    Note: If the probe is open or the circuit’s resistance to being tested is more than 6000, the display will show “OL”.
    4.16 Capacitance Measurement
    Warning
    Electric shock hazard.
    To avoid electric shock, before measuring capacitance, discharge capacitance completely.
25. Insert black probe to COM jack, insert red probe to the INPUT jack.
26. Measuring switch is placed to position
27. Press the “SEL” button three times to switch to a capacitance measuring state.
    3)After discharging capacitance completely, connect the probe to both ends of the capacitor to be tested for measurement. 4) Read the capacitance on the LCD.
    Note:
28. When measuring bulk capacitors, readings will stabilize after a few seconds (400pF and 4000pF).
29. To improve the accuracy below 40nF measuring value, subtract the distributed capacitance of meter and cable.
    4.17 NCV Measurement
30. Press the NCV key..
31. Place the NCV sensor zone close to the conductor. When the test voltage is greater than AC 110V (RMS), when the meter is close to the conductor, the meter induction voltage indicator will turn on and the buzzer will sound.
    Note:
    1: Even there is no indication, the voltage may exist still. Don’t use a non- contact voltage detector to judge whether there is voltage in the wire. Detection operation could be affected by socket design, insulation thickness, type, and other factors.
    2: When inputting voltage on the meter input terminal, due to the existence of the induced voltage, the voltage induction indicator also may light.
    3: Interference sources of the external environment (such as flashlight, motor, etc.) may trigger invalid non-contact voltage detection.
    4.18 Temperature Measurement
32. Insert black probe to COM jack, insert red probe to the INPUT jack.
33. Rotate switch to -TEMP” position. The normal temperature will show on the LCD display simultaneously.
34. Insert K-type thermocouple to the input jack of the meter with correct polarity (insert red one to INPUT jack, and insert black one to COM jack).
35. Measure the inner and outer surfaces of the object to be tested with the measuring end of the thermocouple.
36. Read the measuring value from the LCD display.

Maintenance

5.1 Replace Battery
WARNING
To avoid electric shock, make sure that the test leads have been clearly moving away from the circuit under measurement before opening the battery cover of the meter.
WARNING
Do not mix old and new batteries. Do not mix alkaline, standard (carbon-zinc), or rechargeable (ni-cad, ni-me, etc) batteries. 5.1.1 If the sign “ ” appears, it means that the batteries should be replaced.
5.1.2 Loosen the fixing screw of the battery cover and remove it.
5.1.3 Replace the exhausted batteries with new ones.
5.1.4 Put the battery cover back and fix it again to its original form.
Note:
Do not reverse the polarity of the batteries.
5.2 Replacing Test Leads
Replace test leads if leads become damaged or worn.
WARNING Use meets EN 61010-031 standard, rated CAr Ill 600V, or better test leads.
WARNING To avoid electric shock, make sure the probes are disconnected from the measured circuit before removing the rear cover. Make sure the rear cover is tightly screwed before using the instrument.

Accessories

1. Test leads	1pair

2. User Manual| 1pcs
3. 1.5V AAA Battery| 3pcs

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