Watlow Series 982 - Manual (Page 112)

8.4 WATLOW Series 982 User’s Manual Tuning, Alarms and Error Codes, Chapter 8
Alarms
2. Set the jumper to the position you want. See below for jumper location.
3. Return the control chassis to the case. Be sure you have it oriented cor-
rectly. Press firmly, but gently, to seat the chassis.
When you select Form A, the contact is open when power is removed
from the control. When selecting Form B, the contact closes when
power is removed.
Using Alarms
Output 2, 3, and/or 4 of the Series 981/982 can be selected as alarms.
This is accomplished in the Output (OtPt) menu under the Ot2, Ot3, or
Ot4 prompt. If ALX is selected, the output is energized in the non-alarm
condition and de-energizes the output in the alarm condition. Selecting
ALXn reverses this action; the output is then de-energized in the non-
alarm condition and energized in an alarm condition.
If the L2, L3 or L4 LED on the front panel is lit, this indicates an alarm
condition for Output 2, 3 or 4 respectively.
Once you’ve configured the outputs as alarms, enter the OtPt menu again
and select the AL2, AL3 and/or AL4 prompt respectively. These prompts
select the type of alarm, process, deviation or rate. Each may be indepen-
dently set low and high. Choose between process alarm input 1 (Pr1), devi-
ation alarm input 1 (dE1), or rate (rAtE) alarm referenced to Input 1.
A process alarm sets an absolute temperature. When the process exceeds
that absolute temperature limit an alarm occurs. A process alarm is inde-
pendent from set point.
Example: If your set point is 100°F and a process alarm is set at 150°F as
the high alarm, and 50°F as the low limit, the high limit trips at 150°F,
and the low alarm at 50°F. If you change the set point, the process alarm
limits remain the same.
A deviation alarm alerts the operator when the process strays too far
˜
NOTE:
An X applies to
Alarm 2, 3 and/or 4.
Jumper NO NC
Position (normally open) (normally closed)
In Alarm Condition
OtX = ALX contacts open contacts closed
OtX = ALXn contacts closed contacts open
In Non-alarm Condition
OtX = ALX contacts closed contacts open
OtX = ALXn contacts open contacts closed