7
Advanced Functions
AC current measurement with “Inrush” function
Inrush current is the instantaneous high input
current drawn by a power supply or electrical
equipment at turn-on� This arises due to the
high initial currents required to charge the
capacitors and inductors or transformers�
1 . W i t h t h e d e v i c e t o b e t e s t e d t u r n e d o , t u r n t h e m e t e r ’ s d i a l t o p r o p e r r a n g e ( 6 0 / 6 0 0
or 1000 )�
2. Center the jaw around the device’s live wire.
3� Push the button 3 times until the “INRUSH” symbol is displayed�
4. Switch on the device. The inrush current (spike) is displayed in the meter’s display.
Note:
The measuring time of inrush current is about 100ms�
Steady-state current value
Pulse widt h
Time
Current
Inrush current magnitude
Peak current
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