Pro's Kit MT-3110 User manual

MT-3110
3 5/6 Smart Digital Clamp Meter
User’s Manual
1st Edition,
© 2016 Copyright by Prokit’s Industries Co., Ltd.

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1.Safety Information
Warnings
Special attention shall be paid when using the meter, improper use might
cause an electric shock or damage the meter. General safety procedures shall
be followed during the use and safety measures regulated by the instruction
manual shall be completely respected.
To fully make use of the functions of the meter and ensure safe operation,
please carefully read and follow the use method of this manual.
The meter meets IEC-61010-1, IEC-61010-2-030, IEC-61010-2-032）Safety
Requirements for Electronic Measuring Instruments, of the secondary pollution,
over-voltage standard is CATIII 600V.
Please follow the safe operation guidance and ensure to use the meter in safe.
1.1 Preparations
When use the meter, users must comply with the standard safety rules:
- General protection against electric shock
- Prevent misuse of the meter
After received the meter, check if it has been damaged during the delivery.
After been kept and delivered in shoddy conditions check and confirm if the
meter is damaged or not.
The pen-shape meter must be in good condition. Before use, check the
pen-shape meter see if any damage to the insulation, if the metal wire of the
cable is bare.
1.2 Marks
Note (important security information, see the Instruction Manual)
It can be used on hazardous live conductors.
Double insulation protection (Category II)
CATIII follows the over-voltage (Setup) level III of IEC-61010-1 standard and
pollution degree 2 means the impulse withstand voltage level of protection
provided.
In line with the European Union (EU) Standard
Grounding
1.3 Maintenance
Please do not attempt to open the bottom case to adjust or repair the meter,
such operation could only be performed by technicians fully aware of the meter
and the risk of electric shock.

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Before opening the meter case or battery cover at the end, the pen-shape meter
should be removed from the circuit being measured.
To avoid electric shock that might be caused by erroneous readings, when the
meter displays “ ” symbol, the battery should be replaced immediately.
Use a damp cloth and mild detergent to clean the meter, do not use abrasive
cleaning agents or solvents.
Power supply of the meter should be turned off when not in use, range switch to
the OFF position.
If the meter is not used for a long time, batteries should be removed to prevent
damage to the meter.
2.Descriptions
2.1 Part Name
①Non-contact voltage detection sensing area
②Data hold /Back Light button
③Rotary switch
④Display screen
⑤Input socket
⑥Maximum peak /Non-contact voltage detection button
⑦Trigger
⑧Current clamp head: used for measuring current
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①
②
③
④
⑤
⑥
⑦
⑧

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2.2 Instructions to rotary switch and key as well as input socket
OFF: Meter OFF position
Measuring position
DC voltage, AC voltage, resistance and buzzer input terminals
Current input into mutual inductor
2.3 LCD Display Unit
AC, DC
Connected disconnect indicate
AUTO
AutoScan Mode
PMAX
Maximum peak current measurement
Automatic shutdown indicate
LOW BATTERY
Readings hold status
V,A
Volt (voltage), Ampere (current)
Ω, kΩ, MΩ
Ohm, Kilohm, Megohm (resistance)
Hz, kHz，
Hertz, Kilohertz
NCV
Non-contact voltage detection
3.Specifications
The meter should specify one year as a cycle to re-calibrate in the conditions of
18℃～28℃ and relative humidity less than 75.
3.1 Overview
Automatically select measurement function and range.
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Overload protection for the whole measurement range.
Maximum allowable voltage between the measuring terminal and the Earth:
600V DC or 600V AC
Work height: maximum 2000m
Display: LCD
Maximum display value: 6000 digits.
Polar indication: automatically indicate,‘-’ means negative polarity.
Over range Indication: ‘0L’ or ‘-0L’.
Sampling time: about 3 times/s
Unit display: with function and quantity of electricity unit display
Automatic Power off time: 10 minutes
Power supply: 1.5V AAA battery ×2
Battery low voltage indication: LCD display symbol.
Temperature coefficient: < 0.1×accuracy degree/℃
Working temperature: 18℃ ～ 28℃
Storage temperature: -10℃ ～ 50℃
3.2 Technical Index
AC Current
Measurement range
Distinguish ability
Accuracy degree
6A
0.001A
（2.5% reading + 8 word）
60A
0.01A
400A
0.1A
400A~600A
0.1A
（3% reading + 10 word）
Minimum input current: 0.01A AC current
Maximum input current: 600A AC current
Frequency range: 45～65Hz;
When in AC current measurement, the meter automatically switches on
internal low pass filter to filter out high frequency current, low pass filter
bandwidth is 1kHz (-3dB)
Maximum Peak Current
Measurement range
Distinguish ability
Accuracy degree
900A
0.1A
（10% reading + 10 word）
Capture the highest frequency: 1KHz; Measurement range: 10 ~ 900A;
DC Voltage
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Measurement range
Distinguish ability
Accuracy degree
6V
0.001V
0.5% reading +3 word
60V
0.01V
600
0.1V
Minimum input voltage: 0.5V DC
Maximum input voltage: 600V DC
AC Voltage
Measurement range
Distinguish ability
Accuracy degree
6V
0.001V
0.8% reading +5 word
60V
0.01V
600V
0.1V
Minimum input voltage: 1.0V AC
Maximum input voltage: 600V AC (effective value)
Frequency range: 45 ~ 65Hz
Frequency
Clamp head frequency measurement (Pass A position):
Measurement range
Distinguish ability
Accuracy degree
60.0Hz
0.1Hz
（1.0% reading + 5
word）
1000Hz
1Hz
Measurement range: 40Hz ~ 1000Hz
Input signal range: ≥ 0.2A AC current (effective value)
Pass V position:
Measurement range
Distinguish ability
Accuracy degree
60.0Hz
0.1Hz
（1.0% reading + 5
word）
1000Hz
1Hz
Measurement range: 40Hz ~ 1000Hz
Input signal range: ≥ 0.8V AC voltage (effective value)
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Resistance
Measurement range
Distinguish ability
Accuracy degree
6k
0.001k
0.8% reading +3 word
60k
0.01k
600k
0.1k
6M
0.001M
10M
0.01M
Overload protection: 600V DC or AC (effective value)
Line on-off test
Measurement range
Distinguish ability
Functions
1
If the resistance of
circuit being
measured is less than
50±30, then the
beeper in the meter
may sound.
Overload protection: 600V DC or AC (effective value)
4.Operation Guide
4.1 Readings Hold
During the measuring process, if the readings are required to hold, slightly
touch key ,the display value will be locked, slight press key again to
cancel readings hold.
4.2 Backlight
1）In the process of measurement, if the ambient light is too dim, causing reading
difficulties, press key for more than 2s, open Back Light and it will
automatically off after about 1 minute.
2）During the process if press key for more than 2s, then the Back Light will
be turned off.
4.3 Auto Power Off
1）If after 10 minutes when the meter is on without any operation, it will go into
hibernation and automatically shut down to save power. Before the meter off,
there will be one sound of the buzzer to remind every 1 minute.
2）Press any key after auto power off to wake the meter into working status.
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3）When turn the meter on, hold the "PMAX/NCV" key at the same time, then the
auto power off function is canceled.
4.4 Measurement Preparations
1）Turn the transfer switch, turn on the power. If the battery voltage is low (of
about ≤2.4V), the LCD will show“ ”symbol, then the battery shall be
replaced.
2）When the meter has not entered into measurement, it will automatically enter
into the status of automatic scan, the meter displays as the following diagram
shows.
4.5 Capture PMAX Current
1）Slightly touch PMAX key, the meter displays as the following diagram.
2）Hold the trigger, open the clamp head and clamp one cable of the measured
circuit.
3）When measuring the current, when capture current >10.0A, the meter
displays the maximum current value captured.

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Note:
1）Clamp two lines of the measured circuit or more at the same time will not
obtain correct measurement results.
2）To obtain accurate readings, try to enable the measured cable in the middle
position of the current clamp.
3）In the maximum capture current mode, the meter only measures current, it
will not measure voltage and resistance at the same time.
4.6 Non-contact Voltage Detection (NCV)
1）Press PMAX/NCV key for 2s, enable NCV function, the meter displays
2）Press NCV key, put the NCV sensor close to the measured cable, the meter
could detect if the measured cable is >90V AC voltage or not. When the meter
detects AC voltage, the meter buzzer alarms and the backlight flashes.
Note:
3）Even there is no alarm indication, the voltage might still exist. Do not judge if
there exist voltage or not in the cable relying on non-contact voltage detector.
The detection operation might be affected by various factors such as the
socket design and insulation thickness types are different and so on.
4）In NCV detection mode, the meter will not measure the voltage, resistance
and current at the same time.
4.7 AC Current Measurement
1）Hold the trigger, open the clamp head and clamp one cable of the measured
circuit.

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2）When measured signal >0.01A, the main LCD of the meter displays the
measured current value, the vice LCD displays current frequency (Note: only
when current value >0.2A could the meter displays its frequency value)
4.8 DC Voltage Measurement
1）Connect the pen-shaped meter to the measured signal, when the measured
signal =0.5V, will the meter display current measuring DC voltage value. When
measured signal is <0.5V, the meter will be default as resistance value,
displays the ohm of the measured signal.
4.9 AC Voltage Measurement
1）Connect the pen-shaped meter to the measured signal, when the measured
signal >=1.0V, will the main LCD of the meter display current measuring AC
voltage value, and the vice LCD will display the frequency value of the voltage.
When measured signal is <1.0V, the meter will be default as resistance value,
displays the ohm of the measured signal.

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4.10 Resistance Measurement
1）Connect the pen-shaped meter to the measured resistance, when the
measured resistance >10M, the meter will display----, when the measured
resistance is less than 50, the meter buzzer will send out alarm sound.
4.11 Measure AC current and AC voltage at the same time
1）Hold the trigger, open the clamp head and clamp one cable of the measured
circuit, when the measured signal >0.01A, the meter vice LCD will display
measured current value.
2）Connect the pen-shaped meter to the measured signal, when the measured
signal =1.0V, the meter main LCD will display current measured AC voltage
value. When measured signal is <1.0V, the meter will be default as resistance
value, displays the ohm of the measured signal.

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4.12 Measure AC current and DC voltage at the same time
1）Hold the trigger, open the clamp head and clamp one cable of the measured
circuit, when the measured signal >0.01A, the meter vice LCD will display
measured current value.
2）Connect the pen-shaped meter to the measured signal, when the measured
DC signal =0.5V, the meter main LCD will display current measured DC
voltage value. When the measured DC signal <0.5V, the meter will be default
as resistance value, displays the ohm of the measured signal.
4.13 Measure AC current and resistance at the same time
1）Hold the trigger, open the clamp head and clamp one cable of the measured
circuit, when the measured signal >0.01A, the meter vice LCD will display
measured current value.
2）Connect the pen-shaped meter to the measured resistance, when the
measured resistance >10M, the meter will display----, when the measured
resistance is less than 50, the meter buzzer will send out alarm sound.

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5. Maintenance
5.1 Replace Battery
Warnings
Before opening the battery cover of the meter, the pen-shape meter
shall be moved from the measuring circuit first to prevent the risk of
electric shock.
3）If “ ” symbol appears, it means the battery shall be replaced.
4）Screw the fastening screws of the meter battery cover and move away.
5）Replace the old battery.
6）Install the battery cover as previous.
7）Note:
8）Do not violate the battery polarity.
5.2 Replace Pen-shaped Meter
Warnings
When replacing the pen-shaped meter, the new ones shall be of the
same or in eqaul level. The pen-shaped meter shall be in good
condition, pen-shaped meter level: 1000V 10A.
If the insulation layer of the pen-shaped meter is damaged, such as the metal
wire of the cable is exposed, then it shall be replaced.
6. Accessories
1）
Pen-shaped meter
Level: 1000V 10A
One pair
2）
Instruction Manual
One
copy
3）
Cloth bag
1pc