Please do not loosen trigger suddenly. As a 
sensitive device, Hall element will be sensitive to 
heat and mechanical stress to different extents 
except magnetic sensitivity. Collision will cause 
short-term reading variation. 
        Please open the clamp head by pressing 
trigger then fetch measured conductor by clamp 
head and loosen trigger slowly until it is closed 
completely. Please check if measured conductor 
is in the middle of clamp head or not. Additional 
error may be caused if failing to place it in the 
middle of clamp head. Clamp meter can measure 
a current conductor once and measurement 
reading error may be caused if measuring two or 
more current conductors at the same time.

IX. TECHNICAL INDICATORS

1.General specification
LCD display: 3 3/4-bit LCD display with the 
maximum display to 3,999;
Polarity display: Automatic positive/negative 
polarity display;
Overload display: To display 

OL

 or 

-OL

;

Under-voltage display: 

 symbol can show 

that battery voltage is less than working voltage 
for battery replacement reference;
Sampling rate: 3 times/second;
Sensor category: Hall affect sensor for DC/AC 
measurement;
Error of testing position: 

1.0% of additional 

reading error may be caused if failing to place 
measured source to center of clamp head during 
current measurement;

Collision-resistance strength: To bear falling-off 
collision for 1m;
The maximum opening dimension of clamp head: 
Diameter of 28mm;
The maximum forecast dimension of current 
conduits: Diameter of 26mm;
Influence of electromagnetic field: Device used 
near electromagnetic field may display unstable 
or incorrect reading;

2.Environment limitation
Indoor use
The 

altitude

 height: 2,000m

Safety rules: ICE 1010-1 CAT.II 600V 
CAT.III300V
Hazard level: 2
Operation temperature & humidity: 0

 to 30

(not more than 80%R.H.)
30

 to 40

 (not more than 75%R.H.)

40

 to 50

 (not more than 45%R.H.)

Storage temperature & humidity: -20

 to +60

(not more than 80%R.H.)

3.Electrical specification

Accuracy:

(& of reading and bit quantity);

Correction period is 1 year;

Ambient temperature: 23

5

Ambient humidity: Not more than 80% R.H.

Temperature coefficient: 0.1*precision/1

(1)DC voltage (       )

Range
400.0mV
4.000V
40.00V
400.0V
600V

Resolution
0.1mV
1mV
10mV
100mV
1V

Accuracy

(0.8%+3)

(0.8%+1)

(1%+3)

Overload protection

600V DC/AC

Input impedance: 10M