Integral
Operation Function
Copyright © Itech Electronics Co., Ltd.
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Chapter5 Integral Operation Function
This chapter describes the features and use of the integral function of the
IT9121 power meter in details.
5.1 Basic Concepts
The IT9121 power meter can be used for integral operation of the current and
power of the input unit. Technical indicators can be calculated. In addition, the
range can be switched automatically in the Buy and Sell modes according to the
input level so as to accurately complete integrate measurement.
During operation of the air-conditioner, refrigerator, induction cook and other
household appliances, the working status will change frequently, resulting in
changes of the working current in a large scale. The current may decrease of
dozens of amperes to a few milliamperes. Ordinary power measuring
instruments can only be used for integral measurement within one range. If the
measured value exceeds the current maximum range, the measurement result
is inaccurate. You need to manually switch the range before integral
measurement. Integral measurement of equipment subject to large current
changes cannot be performed continuously. The IT9120 series power meter
can automatically switch the range in the integral mode. Therefore, errors of
integral measurement caused by manual range switching can be eliminated,
and the power consumption of household appliances can be measured more
accurately. See the schematic diagram below.
Introduction of soft keys on the interface
When the “Integ” button is pressed, the initial integral measurement interface
below will appear.
