Note: If the (ZEROed value +relative measured value) is greater than the
range (4000 counts), the meter will still show OL under ZERO function.
Namely, if the absolute measured value is greater than 4000 counts, LCD
shows OL.
3.4 Data Hold of the LCD Reading
Press the HOLD button, then the reading shall be held and kept on LCD.
3.5 In-Rush Current (INR) Measurement
When an electrical device (e.g. AC motor) is first turned on, surge current
(inrush current) occurs. Surge current (Inrush current) is usually much
larger than normal operating current. Once the device reach its normal
operating condition, the current stabilizes at normal operating current.
In the ACA current functions (4A, 40A, 400A, 1000A), press the INR
(In-Rush Current) button to enter the in-rush current mode. The clamp
meter will start a 100mS integration window and calculate the RMS
value when a current of 0.2 A for 4A range is detected.
Note: The trigger currents (threshold) are 2A for 40A AC range, 20A for
400A AC range and 200A for 1000A AC range.
3.6 Auto Power Off
The clamp meter will turn itself off in 15 minutes. To turn it back on just
press any buttons or rotary switch to a different position.
To disable the auto power off function, press and hold any buttons
(except the HOLD button) and turn the clamp meter on.
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