16
Additional Notes
Decimal Places
When the measuring value and all parameter value shows 0.1
℃
or 0.1
℉
during measuring temperature (depends on
parameter setting Fru), the range of parameter will become
–999.0
℃
～
+3000.0
℃
or
–999.0
℉
～
+3000.0
℉
, even the
default range is-9990
～
+30000. The decimal place after 999.9 will be truncated. For linear signal definition, the decimal
place are only for display. The value showing does not affect internal resolution and scale.
Alarm blocking at the beginning of power on
Some unnecessary alarms often occur at the beginning of power on. In a heating system, at the beginning of powers on,
its temperature is much lower than the setpoint. If low limit and deviation low limit are set and the alarm condition are
satisfied, the instrument should alarm, but there is no problem in the system. Contrarily, in an refrigerating system, the
unnecessary high limit or deviation high limit alarm may occur at the beginning of power on. Therefore, AI instruments
offer the function of alarm blocking at the beginning of power on. When Act is set to rEbA or drbA, the corresponding low
or high alarms are blocked until the alarm condition first clears. If the alarm condition is satisfied again, the alarm will
work.
Temperature Transmitter
Besides AI PID, stand PID control and on-off control, if the output is defined as current output, the instrument can also
retransmit PV (process value) into linear current. The precision of current output is 0.2%FS, as 0.5%FS transmitter
counted whole system.
Parameter setting suggestion
CtrL=POP
InP=0
SCL=0.0
SCH=400.0
Opt=4-20
The input reads from a K thermocouple, ranging 0
～
400
℃
, output current as 4
～
20mA.
