Chromalox 1604 User Manual download pdf (Page 34)

Output status indication: Two indicators (OUT 1

and OUT 2) are lits when the respective output is

in ON condition.

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.

Cycle times:

- For out 1 it is programmable from 1 to 200 s.

- For out 2 it is programmable from 1 to 200 s.

Relative cooling gain: programmable from

0.20 to 1.00.

Overlap/dead band: programmable from - 20 %

to + 50 % of the proportional band

OUTPUT 1

Type: relay SPDT contact (NO or NC selectable

by jumper).

Contact rated: 3 A at 250 V AC on resistive load.

Output cycle time:programmable from 1 s to

200 s.

Function: programmable as heating or cooling

output

OUTPUT 2

Type: relay SPST contact .

Contact rated: 2 A at 250 V AC on resistive load.

Function: programmable as:

- control output ( cooling)

- Alarm 1 output

Output cycle time (when used as control output):

programmable from 1 s to 200 s.

OUTPUT 3

Type: relay with SPST contact

Contact rated: 2 A at 250 V AC on resistive load.

Function: Alarm 2 output.

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).

Band alarm

Operative mode: Inside or outside programma-

ble.

Threshold : programmable from 0 to 500 units.

Hysteresis : programmable from 0.1 % to 10.0 % of

the input span.

Deviation alarm:

Operative mode : High or low programmable.

Threshold : programmable from - 500 to +500 units.

Hysteresis : programmable from 0.1 % to 10.0 % of

the input span.

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Chromalox 1604 User Manual Page 34

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