GW Instek PPH-1503 - Manual (Page 49)

BASIC OPERATION
49
Long integration
Description
The long current integration measurement function
measures the mean (average) current over a single or
multiple current pulses. The long integration time
period must be a full period or integer multiples of a
complete period of the measured pulse current. The
Long integration measurement calculates the whole
integration time as an integer number of integration
cycles. An integration cycle is the line cycle period plus
the data processing time.
For example, if the line frequency is 60Hz, then a single
integration cycle is 16.7mS, if the frequency is 50Hz,
then a single integration cycle is must be 20mS. Long
integraton is one of the methods to extend A/D circuits
to exceed beyond their maximum integration time. The
A /D conversion circuits can measure a pulse of up to
833 mS. Long integration measurement extends the
A/D integration time to achieve a longer pulse
measurement. This can extend the measurement time
for long integration to a maximum of 60S.
Note: When this feature is used, the current range is
set to 5A.