Chromalox TEMPERATURE CONTROLLER 1604-7 - Manual (Page 25)

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When it is desired to switch from LOCK
to UNLOCK condition, set a value equal
to P17 parameter.
When it is desired to switch from
UNLOCK to LOCK condition, set a value
different from P17 parameter.
AL1 Alarm 1 threshold
This parameter is available only if P 9 is
equal to AL1.P, AL1.b or AL1.d.
Ranges:
- Span limits for process alarm.
- From 0 to 500 units for band alarm.
- From -500 to 500 units for deviation
alarm.
HSA1 Alarm 1 hysteresis
This parameter is available only if P 9 is
equal to AL1.P, AL1.b or AL1.d.
Range:From 0.1% to 10.0% of the input
span or 1 LSD.
Note: If the hysteresis of a band alarm is
larger than the alarm band, the instrument
will use an hysteresis value equal to the
programmed band minus 1 digit.
AL2 Alarm 2 threshold
This parameter is available only if P 11
is equal to AL2.P, AL2.b or AL2.d and
P13 = OPrt.
For other details see AL1parameter.
HSA2 Alarm 2 hysteresis
This parameter is available only if P 11
is equal to AL2.P, AL2.b or AL2.d and
P13 = OPrt.
For other details see HSA1parameter.
Pb Proportional band
Range: from 1.0% to 200.0% of the input
span.
When Pb parameter is set to 0, the
control action becomes ON-OFF.
OPERATIVE PARAMETERS
Push the FUNC pushbutton, the lower display will
show the code while the upper display will show
the value or the status (On or OFF) of the
selected parameter.
By
s or t pushbutton it is possible to set the
desired value or the desired status.
Pushing the FUNC pushbutton, the instrument
memorizes the new value (or the new status) and
goes to the next parameter.
Some of the following parameter may be skipped
according to the instrument configuration.
Param. DESCRIPTION
SP Set point (in eng. units).
Range: from rL to rH.
SP is operative when the logic input is
open.
Snrt SMART status.
The On or OFF indication shows the
actual status of the SMART function
(enabled or disabled respectively).
Set On to enable the SMART function.
Set OFF to disable the SMART function.
n.rSt Manual reset of the alarms.
This parameter is skipped if none of the
alarms has the manual reset function.
Set On and push FUNC to reset the alarms.
SP2 Set point 2 (in eng. units).
Range: from rL to rH.
SP2 is operative when the logic input is
closed.
nnn Software key for parameter
protection.
This parameter is skipped if P17 = 0 or 1
On = the instrument is in LOCK condition
OFF = the instrument is in UNLOCK
condition
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