GAOTek AC Clamp Meter with Wide Measuring Range

This AC clamp meter is specially designed for measuring AC current and AC leakage current and comes with an on-line AC current measuring system with a wide measuring range of current from 0mA~600A.




The GAOTek AC Clamp Meter with a wide measuring range is specially designed for measuring AC currents and AC leakage currents with a wide measuring range of 0 mA ~ 600 A and an on-line AC current measuring system. This clamp meter comes with a large data storage of 99 units. It offers modern CT-technology and digital integration technology; the clamp core adopts a special alloy with magnetic shielding technology. This clamp meter is comprised of a RS-232 interface, communication cable, and software through which historical data is available for data reading, saving, and printing. This clamp meter complies with IEC1010-1, IEC1010-2-032, Pollution level 2, and CAT III (600 V) safety standards.

Key Features

  • Measurement of AC current ranges from 0 mA ~ 600 A
  • Up to 600 V line voltage
  • Resolution value is 1 mA
  • Small in size, high accuracy and flawless function
  • High precision, high stability and high reliability for continuous measurement
  • Offers peak holding, data holding and data storage functions
  • Four Digits LCD Mode
  • Online real-time monitoring, Min-AVG-MAX indication and dynamic display
  • Data stored in the memory of the meter uploaded to PC via RS-232 interface
  • Automatic power off to lower the power consumption
  • Test mode: Clamp CT and integral mode
  • Free from influences of external magnetic field
  • Clamp meter widely used in the fields of electricity, communications, railroad, meteorology, oil field, railroad, industries and mining establishments
  • IEC1010-1, IEC1010-2-032, Pollution level 2 and CAT III (600 V) safety standards

Technical Specifications

Test Mode Clamp CT, Integral approach
Standards IEC1010-1, IEC1010-2-032, Pollution level 2,CAT III (600 V)
Interface RS-232
Measurement Range 0 mA ~ 600 A (AC)
Test Position Tested wire in the jaw center.
Clamp Size 1.38 in × 1.57 in (35 mm × 40 mm)
Resolution 1 mA (AC)
Frequency 50 Hz, 60 Hz (Automatic Identification)
Accuracy 0 A ~ 60 A ± 1.5 % rdg ±5 dgt 73.4 ˚F± 41 ˚F (23 ˚C ± 3 ˚C), below 70 % RH
60 A ~ 200 A ± 2 % rdg ±5 dgt
200 A ~ 300 A ± 3 % rdg ±5 dgt
300 A ~ 600 A ± 4 % rdg ±5 dgt
Voltage Range 600 V (AC)
Power Consumption 5 mW
Sampling Rate 2 times/second
Insulating Strength AC 2 kV/rms (between the alloy of the clamp and the housing)
Data Memory 99 sets
Range Shift Automatic shift
Display Mode 4-digits LCD Mode
Out of Range Indication OL (indicates on LCD)
Reading Hold Indication DH (indicates on LCD)
Auto Power-off 5 minutes after power on
Battery Zn-Mn dry battery,6F22, 9 V
Weight 4.94 oz. (140 g) – with battery
Dimension 6.89 in × 2.75 in × 1.5 in (175 mm × 70 mm × 38 mm)
LCD Dimension 1.38 in × 0.85 in (35 mm × 21.5 mm)

Display domain: 1.26 in × 0.6 in (32 mm × 15 mm)

Operating Temperature Humidity Below 80 % RH
Storage Temperature Humidity Below 70 % RH
Operating Temperature 32 ˚F to 104 ˚F (0 ˚C to +40 ˚C)
Storage Temperature 14 ˚F to 140 ˚F (-10 ˚C to +60 ˚C)


Package includes as follows

Item Quantity
Clamp Tester 1 pc
RS-232 Com cable 1 pc
Battery (6F22 9 V) 1 pc
Software 1 disk
User manual 1 copy
Warranty card/Certification 1 copy

Field Application:

Structure of the Leaker:

  1. Double input toroid
  2. Upper cover
  3. Toroid opening cover
  4. HOLD key
  5. POWER key
  6. LCD
  7. RS232 interface
  8. Back cover
  9. Battery cover

Operating method:

Start-up, Shut down:

  • To start up the tester press the POWER Once switched on the power key the LCD begin to display.
  • To shut down the tester press the POWER
  • To reduce the battery consumption the leaker shuts down automatically after start up for 5 minutes.
  • LCD send the flick notes the leaker is going to shut down automatically after flickering for 30 seconds.
  • By pressing POWER key when LCD is flickering the leaker will continue to work for 5 minutes.
  • If the LCD displays dark after starting up, it is due to low voltage battery and change the battery immediately.


  • Start up the meter
  • Release the toroid lever to open the clamp head and clamp conductors.
  • Read the LCD data. In case if the display indicates “OL mA “symbol, the current of measured line is beyond the maximum limit of this leaker, shift the gear with much higher range limit.

Peak Holding:

Press the HOLD key continuously while measuring the current more than 3 seconds, the leaker captures the peak values of the current. Releasing the HOLD key returns to the measuring state

Hold, Storage, Access Reading and Deleting:

  • By pressing HOLD key for a short time during measurement i.e.) less than 3 seconds “DH” symbol will display, the leaker holds measuring the current  and the measured data automatically stored in the memory with a code.
  • By pressing the HOLD key again release the hold state and the leaker continues its measuring.
  • In case of stored data reaches 60 groups, press HOLD key again. “FULL” symbol denotes to storage memory is full.
  • To enter into data access mode press the HOLD key for a long time. It displays Unit 1 data storage automatically and press the HOLD key again to turn the pages of stored data. “NULL” display denotes when there is no data stored in the memory. Power off the meter to exit data access mode.
  • To clean up the data, enter into data access mode by pressing HOLD key for less than 3 seconds and all stored data get cleaned up. When the meter displaying “dEL” symbol, it means it has finished clean-up process, and return to measuring state automatically.

Function Quick Look Up:

POWER key short press Power on/shutdown/exit
HOLD key shot press Data holding/release/storage
HOLD key pressing for more than 3 seconds Peak holding

(at measuring mode)

HOLD key pressing for 3 seconds Clear data
HOLD key + POWER key Data access/turn pages (HOLD key)

 Display Example and Meaning

  1. Leakage current measured is 0.25 mA

2. Change the battery if it indicates low

3. Leakage current measured is 0.25 mA and automatically stored unit ID is No.03

4. Access the unit 3 of the stored data

Electrical Signs:

  High voltage, Extremely dangerous. Operators should follow the safety rules. There would be dangers of electric shock to cause personal injuries or casualties.
  Dangerous! Operators should follow the safety rules. There would be dangers of electric shock to cause personal injuries or casualties.
Attention! Operators should follow the safety rules when measuring heavy current. There would be dangers of electric shock to cause personal injuries or equipment damages might be caused.
In locations with difficulty to read out data, use the data holding function. If [DH] symbol displayed, discharge data holding state first, and then do the test.