At SRRC, a precision output current monitoring

system is installed to monitor the output performance of

all the booster/storage ring power supplies. Accurate DC

current transformers (DCCTs) are attached to the output

terminal of every power supply system. Each

transformer’ s gain/offset are carefully calibrated against

high precision current source and approximated using

high-order polynomial curve fitting. The output of each

DCCT is connected to multi-channels data logger for realtime

data collection, the collected data are calibrated

using the interpolated DCCT gain/offset value. A PC

station is set up to serve as host to store the current output

for real-time monitoring. This monitoring system provide

a precise real-time database for rapid fault diagnosing

whenever there is malfunction of the beam operation