300A Range
(200 - 300)A
±
(1.9% + 2A)
(2) AC Current
Ranges
40A, 300A
Output
Voltage
10mV / A for 40A Range
1mV / A for 300A Range
Accuracy
40A Range
(0 - 40)A
±
(1.0% + 0.2A) 40-400Hz
300A Range (40 - 200)A
±
(1.0% + 1A) 40-400Hz
300A Range
(200 - 300)A
±
(1.9% + 2A) 40-400Hz
Load
Impendence
100K
Ω
min.AC/DC
OPERATION
This instrument has been designed and tested in accordance with IEC Publications 61010-1 and 61010-2-032, Safety
Requirements For Electronic Measuring Apparatus / current sensors and has been supplied in a safe condition. This
instruction manual contains some information and warnings which have to be followed by the user to ensure safe
operation and to retain the instrument in safe condition.
3-1 Precautions and Preparations for measurement
1. Do not apply the voltage to the output plugs.
2. Make sure that the battery is connected properly.
3. Operate the instrument only in temperature between 0°C ~ 50°C and less than 75% R.H.
4. Do not use or store this instrument in high temperature or high humidity and do not store the unit in direct sunlight.
5. If the unit is not to be used for a long period of time, remove the battery.
6. Do not forget to turn power switch off after use.
7. If the meter is used near equipment that generates electro-magnetic, the output may be unstable or indicate incorrect
measurement values.
8. If the current clamp is used in a manner not specified in this User manual, the provided protection can be impaired
9. Do not extend hands over safety barrier to prevent of electric shock! Only handles are allowed to be touched during
measurement!
10. Consider all generally known precautions in order to avoid risk of electric shock while dealing with electric installations!
THIS INSTRUMENT MUST NOT BE USED ON UNINSULATED CONDUCTORS AT A VOLTAGE
GREATER THAN 300V ac/dc.
3-2 AC Current Measurement
1. Select the highest anticipated input (300A or 40A) by the function switch.
2. Insert the “Output plugs (red and black)” to the input terminals of a Multimeter. Set the Multimeter to “AC 200mV or 2V”
range.
3. Press the trigger to open the transformer jaws and clamp one conductor only, make sure that the jaw is firmly
closed around the conductor, then read the display from the multimeter directly.
(For proper current direction, upper side of the current clamp is facing L)
(To eliminate dc offset, zero adjust first. With jaws closed and away from conductor, continue to press DCA AUTO ZERO
button until instrument reads all zeroes or very close to it.)
3-3 DC Current Measurement
1. Select the highest anticipated input (300A or 40A) by the function switch.
2. Insert the “Output plugs (red and black) “ to the input terminals of a Multimeter.
Set the Multimeter to “DC 200mV or 2V” range.
3. Be sure to zero adjust first. With jaws closed and away from conductor, continue to press DCA AUTO ZERO
Button until instrument reads all zeroes or very close to it.
