Pro's Kit MT-3110 User manual

MT-3110
Intelligent Digits AC Clamp Meter
User’s Manual
1st Edition,
© 2018 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.
Thetest lead must be in good condition. Before use, check thetest lead 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, thetest lead 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
②Rotary switch
③Non-contact voltage detection button
④Display screen
⑤Input socket
⑥Data hold /Back Light button
⑦Maximum button
⑧Trigger
⑨Current clamp head: used for measuring current
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
3

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DC ,AC
DC, AC voltage or Ampere
Connected disconnect indicate
LOW BATTERY
MAX
Maximum current measurement
Automatic shutdown indicate
NCV
Non-contact voltage detection
Readings hold status
Hz
Hertz
Ω, kΩ, MΩ
Ohm, Kilohm, Megohm (resistance)
V
Volt (voltage),
A
Ampere (current)
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.
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/℃
Working temperature: 18℃ ～28℃
Storage temperature: -10℃ ～50℃
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3.2 Technical Index
AC Current
Measurement
range
Resolution
Accuracy
6A
0.001A
（2.5% reading + 8 digits）
60A
0.01A
400A
0.1A
400A~600A
0.1A
（3% reading + 10 digits）
Minimum input current: 0.05A 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)
DC Voltage
Measurement
range
Resolution
Accuracy
6V
0.001V
（0.5% reading +3 digits）
60V
0.01V
600V
0.1V
Minimum input voltage: 0.3V DC
Maximum input voltage: 600V DC
AC Voltage
Measurement
range
Resolution
Accuracy
6V
0.001V
（0.8% reading +5 digits）
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):
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7

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Measurement
range
Resolution
Accuracy
40~60.0Hz
0.1Hz
（1.0% reading + 5 digits）
60.0~1000Hz
1Hz
Measurement range: 40Hz ~ 1000Hz
Input signal range: ≥ 0.2A AC current (effective value)
Pass V position:
Measurement
range
Resolution
Accuracy
40~60.0Hz
0.1Hz
（1.0% reading + 5 digits）
60.0~1000Hz
1Hz
Measurement range: 40Hz ~ 1000Hz
Input signal range: ≥ 1V AC voltage (effective value)
Resistance
Measurement
range
Resolution
Accuracy
6k
0.001k
（0.8% reading +3 digits）
60k
0.01k
600k
0.1k
6M
0.001M
10M
0.01M
Overload protection: 600V DC or AC (effective value)
Continuity
Measurement
range
Resolution
Functions
1
If the resistance of circuit
being measured is less than
30, then the beeper in the
meter may sound.
Overload protection: 600V DC or AC (effective value)
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4.Operation Guide
4.1 Readings Hold
During the measuring process, if the readings are required to hold, slightly
touch "Hold/BL" key ,the display value will be locked, slight press "Hold/BL" key
again to cancel readings hold.
4.2 Back Light
1）In the process of measurement, if the ambient light is too dim, causing reading
difficulties, press "Hold/BL" key for about 2s, open Back Light and it will
automatically off after about 1 minute.
2）During the process if press "Hold/BL" key for about 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 the NCV key after auto power off to wake the meter into working status.
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 AC Current Measurement
1）Hold the trigger, open the clamp head and clamp one cable of the measured
circuit.
2）When measured signal >0.05A, the main LCD of the meter displays the
measured current value, the vice LCD displays current frequency (Note: When
the frequency ＞300Hz, only when current value >0.2A could the meter
displays its frequency value)
3）When measured circuit, slightly touch MAX key, when capture current >0.05A,
the meter displays the maximum current value captured. the meter displays as
the following diagram

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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, frequency and resistance at the same time.
4.6 Non-contact Voltage Detection (NCV)
1）Press NCV key, enable NCV function, the meter displays
2）Put the clamp NCV sensor square 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:
1）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

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affected by various factors such as the socket design and insulation thickness
types are different and so on.
2）In NCV detection mode, the meter will not measure the voltage, resistance and
current at the same time.
4.7 DC Voltage Measurement
1）Connect the test lead to the measured signal, when the measured signal ≥0.3V,
will the meter display current measuring DC voltage value. When measured
signal is <0.3V, the meter will be default as resistance value, displays the ohm
of the measured signal.
4.8 AC Voltage Measurement
1）Connect the test lead to the measured signal, when the measured signal ≥1V,
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 ＜1V, the meter will be default as resistance value, displays
the ohm of the measured signal.
4.9 Resistance Measurement
1）Connect the test lead to the measured resistance, when the measured resistance
>10M, the meter will display----, when the measured resistance is less than

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30, the meter buzzer will send out alarm sound.
4.10 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 >0.05A, the meter vice LCD will display
measured current value.
2）Connect the test lead 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.
4.11 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 ≥0.05A, the meter vice LCD will display
measured current value.

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2）Connect the test lead to the measured signal, when the measured DC signal ≥
0.3V, the meter main LCD will display current measured DC voltage value.
When the measured DC signal <0.3V, 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 ≥0.05A, the meter vice LCD will display
measured current value.
2）Connect the test lead to the measured resistance, when the measured resistance
>10M, the meter will display----, when the measured resistance is less than
30, 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 test lead shall
be moved from the measuring circuit first to prevent the risk of electric
shock.
1）If “ ” symbol appears, it means the battery shall be replaced.
2）Screw the fastening screws of the meter battery cover and move away.
3）Replace the old battery.
4）Install the battery cover as previous.
Note:
Do not violate the battery polarity.
5.2 Replace Test lead
Warnings
When replacing the test lead, the new ones shall be of the same
or in eqaul level. The test lead shall be in good condition, test lead level:
1000V 10A.
If the insulation layer of the test lead is damaged, such as the metal wire of
the cable is exposed, then it shall be replaced.
6. Accessories
1）
Test lead
One pair
2）
Instruction Manual
One copy

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MT-3110 鉗形電表使用說明書
1.聲明
根據國際版權法，未經允許和書面同意，不得以任何形式（包括存儲和檢索或翻譯為其他國家或
地區語言）複製本說明書的任何內容。本說明書在將來的版本中如有更改，恕不另行通知。
警告
“警告”標誌表示會對用戶造成危險的狀況和操作。它要求在執行此操作時必須注意，如果不正確
執此行操作或不遵守此操作步驟，則可能導致人身傷害或傷亡。在不滿足這些條件或沒有完全理
解的情況下，請勿繼續執行警告標誌所指示的任何操作。
使用儀錶前，請仔細閱讀說明書並注意有關安全警告資訊。
2.安全須知
本儀錶符合 IEC-61010-1，IEC-61010-2-030，IEC-61010-2-032 電子測量儀器安全儀器要求，
過電壓標準 600V CAT III 和污染等級 2的安全標準。
請遵循本說明書使用儀錶，否則儀錶所提供的保護功能可能會降低或無效。
3.安全操作規範
警告
為了避免可能的觸電或人身傷害，請切實遵守以下的規範：
使用儀錶前，請先閱讀“安全須知”。並嚴格按照規定使用儀錶，否則儀錶所提供的保護能力
可能會降低或無效。
使用儀錶前先檢查外殼。檢查是否存在裂紋或塑膠件缺損。請仔細檢查輸入端子附近的絕緣
體。
若儀錶工作不正常或損壞，請勿使用。
禁止觸摸電壓超過 30V 真有效值交流電、42 V 交流電峰值或 60V 直流電的帶電體。
應按照指定的測量類別、電壓或電流額定值使用儀錶。
當顯示電池電量不足指示時請及時更換電池，以防測量錯誤。
請遵守當地和國家的安全規範。穿戴個人防護用品（經認可的橡膠手套、面具和阻燃衣物
等），以防危險帶電導體外露時遭受電擊和電弧而受傷。
輸入端子間或每個端子與接地點之間施加的電壓不能超過儀錶規定額定值。
測量一個已知電壓，以確定儀錶操作是否正常。
測量時，必須使用正確的輸入端子、功能檔位和量程檔位。
請勿在爆炸性氣體、蒸汽周圍或在潮濕環境中使用儀錶。
請勿使用已損壞的表棒。檢查表棒的絕緣層是否損壞，是否有外露金屬或有磨損跡象。檢查
表棒的通斷性。
測量時，請先連接零線或地線，再連接火線；斷開時，請先切斷火線，再斷開零線和地線。
測量時，請將手指握在表棒護指裝置的後面。
打開儀錶後蓋之前，請先斷開表棒與被測量物件。
請勿在超出儀錶、表棒或附件中額定值最低的單個元件的測量類別 (CAT) 額定值的環境中
使用儀錶。
4.通用技術指標
自動選擇功能及量程:

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全量程過載保護
使用環境條件:
IEC-61010-1，IEC-61010-2-030，IEC-61010-2-032 600V CAT III，污染等級 2
海拔高度 < 2000 m
工作環境溫濕度：18~28℃（<75% RH）
儲存環境溫濕度：-10~50℃（<70% RH, 取掉電池）
溫度係數：0.1準確度/℃
測量端和地之間允許的最大電壓：600V 直流或交流有效值
採樣速率：約 3次/秒。
顯示：3 5/6 位液晶顯示幕
超量程指示：液晶顯示器將顯示“OL”。
電池低壓指示：當電池電壓低於正常工作電壓時，“ ”將顯示在液晶螢幕上。
輸入極性指示：自動顯示“”號
自動關機時間:10 分鐘
電源： 2x1.5V AAA 電池
外形尺寸：188*68*38mm
5.儀錶說明
①非接觸電壓探測感應區
②旋轉開關
③非接觸電壓探測按鍵
④顯示幕
⑤輸入插座
⑥資料保持/背光 按鍵
⑦最大值 按鍵
⑧扳機
⑨電流鉗頭：用於電流的測量
旋轉開關、按鈕及輸入插孔說明
OFF: 儀錶關機檔位
測量檔位。
直流電壓、交流電壓、電阻、蜂鳴輸入端子。
電流輸入互感器
LCD 顯示器

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DC AC
直流、交流
通斷指示
電池不足
MAX
最大值電流測量
自動關機指示
讀數保持狀態
V
伏特（電壓）
A
安培（電流）
kΩMΩ
千歐姆、兆歐姆（電阻）
Hz
赫茲
NCV
非接觸電壓探測
6.技術指標
6.1 交流電流
量程
解析度
準確度
6A
0.001A
（2.5% 讀數 + 8 字）
60A
0.01A
400A
0.1A
400A～600A
0.1A
（3% 讀數 + 10 字）
-最小輸入電流：0.05A AC 電流
- 最大輸入電流：600A AC 電流
-頻率響應範圍：45～65Hz；
- 交流電流測量時，儀錶自動開啟內部低通濾波器，濾除高頻電流，低通濾波器頻寬為
1kHz(-3dB)
6.2 直流電壓
量程
解析度
準確度
6V
0.001V
（0.5%讀數+3 字）
60V
0.01V
600V
0.1V
-最小輸入電壓 0.3V DC

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-最大輸入電壓：600V DC
6.3 交流電壓
量程
解析度
準確度
6V
0.001V
（0.8%讀數+5 字）
60V
0.01V
600V
0.1V
- 最小輸入電壓：1V AC
- 最大輸入電壓：600V AC （有效值）
- 頻率響應範圍：45～65Hz
6.4 頻率
鉗頭測頻（通過 A檔）：
量程
解析度
準確度
40～60Hz
0.1Hz
（1.0% 讀數 + 5 字）
60Hz～1000Hz
1Hz
- 測量範圍：40Hz ～1000Hz
- 輸入信號範圍：≥ 0.2A AC 電流（有效值）
通過 V檔：
量程
解析度
準確度
40～60Hz
0.1Hz
（1.0% 讀數 + 5 字）
60Hz～1000Hz
1Hz
- 測量範圍：40Hz～1000Hz
- 輸入信號範圍：≥ 1V AC 電壓（有效值）
6.5電阻
量程
解析度
準確度
6k
0.001k
（0.8%讀數+3 字）
60k
0.01k
600k
0.1k
6M
0.001M
10M
0.01M
- 超載保護：600V DC 或AC（有效值）

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6.6線路通斷測試
量程
解析度
功能
1
如果被測線路電阻小於 30，儀錶內附蜂鳴器可能發
聲。
- 超載保護：600V DC 或AC（有效值）
7.操作指南
7.1 讀數保持
在測量的過程中，如需要讀數保持，輕觸“Hold/BL”鍵，顯示器的顯示值將被鎖住，再次輕觸
“Hold/BL”鍵，可解除讀數保持。
7.2 背光源
1)在測量的過程中，如果環境光線太暗，致使讀數困難，可按“Hold/BL”鍵約 2秒，打開背光源，
在約 1分鐘後自動關閉。
2)在此期間若按“Hold/BL”鍵約 2秒將關閉背光源。
7.3 自動關機
1)在開機後的 10 分鐘內無任何操作時，儀錶會進入休眠狀態，自動關機以節省電能。關機前 2分
鐘，每隔 1分鐘蜂鳴器有 1聲提示。
2)自動關機後，按 NCV 鍵，喚醒儀錶進入工作狀態。
7.4 測量準備
1)撥動轉換開關，打開電源。如果電池電壓不足（約≤2.4V），
顯示器將顯示“ ”符號，這時應更換電池。
2)未進行測量時，儀錶進入自動掃描狀態，儀錶顯示如圖。
7.5 交流電流測量
1)握住扳機，張開鉗頭，把被測線路的一根導線夾在鉗內。
2)當被測信號≥0.05A 時，儀錶主顯示幕顯示測量的電流值，副顯示幕顯示電流的頻率值（注：當
頻率＞300Hz 時，只有電流值＞0.2A 時儀錶才會顯示其頻率值）
3)在測量過程中，輕觸 MAX 鍵，儀錶顯示測量時捕捉的最大電流值。

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注意：
1）同時夾住被測線路的兩根或更多導線不能獲得正確的測量結果。
2）為獲得準確的讀數，應盡可能使被測導線處於電流鉗中心位置。
3）在捕捉最大電流模式，儀錶只測量電流，不會同時測量電壓、頻率及電阻。
7.6非接觸電壓探測（NCV）
1)按NCV 鍵，儀錶顯示 NCV
2)將儀錶鉗頭感應區靠近被測導線，儀錶可以探測被測導線是否＞90V交流電壓。當儀錶探測到
交流電壓時，儀錶蜂鳴器報警同時背光閃爍。
注意：
1)即使沒有報警指示，電壓仍然可能存在。不要依靠非接觸電壓探測器來判斷導線是否存在電壓。
探測操作可能會受到插座設計、絕緣厚度類型不同等因素的影響。
2)在NCV 探測模式，儀錶不會同時測量電壓、電阻、電流。

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7.7直流電壓測量
將表筆連接被測信號，當被測信號≥0.3V 時儀錶會顯示當前測量的直流電壓值。當被
測信號＜0.3V 時儀錶會預設為電阻值，顯示被測信號的內阻值。
7.8交流電壓測量
將表筆連接被測信號，當被測交流信號≥1V 時儀錶主顯示幕會顯示當前測量交流電壓值，副
顯示幕顯示電壓的頻率值。當被測交流信號＜1V 時儀錶會預設為電阻值，顯示被測信號的內阻值。
7.9電阻測量
將表筆連接被測電阻，當被測電阻＞10M時，儀錶會顯示----，當被測電阻小於 30，儀錶
蜂鳴器會發出報警聲。

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7.10同時測量交流電流與交流電壓
1）握住扳機，張開鉗頭，把被測線路的一根導線夾在鉗內，當被測信號≥0.05A 時，儀錶副顯示
幕顯示測量的電流值。
2）將表筆連接被測信號，當被測交流信號≥1V 時儀錶主顯示幕會顯示當前測量交流電壓值。當被
測交流信號＜1V 時儀錶會預設為電阻值，顯示被測信號的內阻值。
7.11同時測量交流電流與直流電壓
1）握住扳機，張開鉗頭，把被測線路的一根導線夾在鉗內，當被測信號≥0.05A 時，儀錶副顯示
幕顯示測量的電流值。
2）將表筆連接被測信號，當被測直流信號≥0.3V 時儀錶主顯示幕會顯示當前測量直流電壓值。當
被測直流信號＜0.3V 時儀錶會預設為電阻值，顯示被測信號的內阻值。