Chromalox TEMPERATURE CONTROLLER 1604-7 - Manual (Page 33)

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Output level limiter:
- For one control medium: from 0 to 100 % .
- For two control mediums: from -100 to +100 %.
This function may be operative at instrument start
up for a programmable time (To avoid thermal
shock and/or preheating the plant) otherwise it can
be enabled by an external contact.
OUTPUT 1
Type: optoisolated 0-20 mA or 4-20 mA
programmable.
Function: programmable as:
- control output (heating or cooling)
- retransm. of the measured value
- retransm. of the operative set point.
Scaling: programmable from -1999 to 9999.
Maximum load: 500
W.
Resolution:
-
0.1 % when used as control output.
- 0.05 % when used as analog retransmission.
Digital filter: it is possible to enable a digital filter,
on the output retransmission, with the same time
constant chosen for the read-out.
Output level indication (as control output only):
from 00.0 to 100.0 %.
Output status indication: the indicator OUT 1
flashes with a duty cycle proportional to the output
level.
OUTPUT 2
Type: relay SPST contact (NO or NC selectable
by jumper).
Contact rated: 2 A at 250 V AC on resistive load.
Function: programmable as:
- control output (heating or cooling)
- Alarm 1 output
Output cycle time (when used as control output)
programmable from 1 s to 99 s.
OUTPUT 3
Type: relay with SPST contact with rated current 2
A at 250 V AC on resistive load.
Function: programmable as:
- control output (heating or cooling)
- Alarm 2 output.
Output cycle time (when used as control output)
programmable from 1 s to 200 s.
ALARMS
Actions: Direct or reverse acting.
Alarm functions: each alarm can be configured
as process alarm, band alarm or deviation alarm.
Alarm reset: automatic or manual reset
programmable on each alarm.
Stand by (mask) alarm: each alarm can be
configured with or without stand by (mask)
function.
This function allows to delete false indication at
instrument start up and/or after a set point change.
Process alarm:
Operative mode : High or low programmable.
Threshold : programmable in engineering unit
within the input span.
Hysteresis: programmable from 0.1 % to 10.0 % of
the input span (P4 - P3), or 1 LDS.
Band alarm:
Operative mode: Inside or outside programmable.
Threshold : programmable from 0 to 500 units.
Hysteresis : programmable from 0.1 % to 10.0 % of
the input span or 1 LDS.
Deviation alarm
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