Super Systems 20Q - Manual (Page 101)

97
These instruments are capable to detect, on the main input, the
sensor leads break condition.
When the sensor leads break condition is detected, the
instrument shows “OPEn” on the upper display.
Note
Note Note Note Note: On the linear input the leads break can be detected only
for 4-20 mA, 1-5 V, 2-10 V, 0-60mV and 12-60 mV ranges.
In addition, on RTD input a special test is provided to signal
“Shrt” when input resistance is less than 12
Ω (Short circuit
sensor detection).
When a fault condition different from overrange or underrange is
detected on the main input, the alarms,the power output and
the analog retransmissions operate as in presence of an
overrange condition.
ON THE AUXILIARY INPUT ON THE AUXILIARY INPUT ON THE AUXILIARY INPUT ON THE AUXILIARY INPUT ON THE AUXILIARY INPUT
When the remote set point signal exceeds the full scale value
programmed by "A.In.t" [C.d10], an OVERRANGE condition will
be shown on the lower display as shown in the following figure:
When the remote set point signal is lower than the initial scale
value programmed by "A.In.t" [C.d10], an UNDERRANGE
condition will be shown on the lower display as show in the
following figure:
These instruments are capable to detect, on the auxiliary input,
the sensor leads break condition.
When the sensor leads break condition is detected, the
instrument shows “OPEn” on the lower display.
NOTE
NOTE NOTE NOTE NOTE: the leads break condition can be detected only if the
selected range has a zero elevation( 4/20 mA or 1/5 V or
2/10 V).
mkc-ssi.pmd 06/07/2004, 12.20 97