NOVA541
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HBA(Heater Break Alarm)
▪ HBA can work only when control output type is “SSR(Solid State Relay)” or “RELAY”.
▪ CT sensor should have the turn ratio of 800:1.
▪ Detection condition : MV output pulse width should be greater than 200ms. If the cycle time is set
to 2 sec, MV should be greater than 10 % (200 ms duty ON).
▪ Accuracy of Measurement : ±3% of F.S. ±1 Digit
▪ Resolution : 0.5A (MAX)
▶ While ON time, detection is done repeatedly and the final value Y is kept while OFF time and until
A’ position the first measurement in the next ON time. The measurement is refreshed at A’.
대기시간
A
ON time
OFF time
CT
XY
A’
200ms
detection enabled
ignored
ON time = CT x MV(%)
(resolution 10ms)
: detection timing