
4.3 Block diagram of PC-300A
M easurement mode
Turn ON/OFF
Display
Calibration
mode
Display &
setup of L1
Display &
setup of H2
Display &
setup of L2
Analog output
of 20mA
Turn on H1
relay test
Turn off H1
relay test
Turn on L1
relay test
Turn off L1
relay test
Display &
setup of H1
Analog output
of 4mA
Turn on H2
relay test
Turn off H2
relay test
Turn off L2
relay test
Turn on L2
relay test
PC-320A Only
PC-320A Only
Push for a while
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