Chromalox 1604-7 Snrt Smart status, RSt Manual reset of the alarms, AL1 Alarm 1 threshold

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.

nnnSoftware 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

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.

22

1604-7-1-AB.p65 22 5/16/00, 10:50 AM