High Level Alarm Switch - Siemens SITRANS L Pointek ULS200 Operating Instructions Manual

6.2

High level alarm switch

Application: an alarm output, high and/or high-high alarm, when the process material rises to
a high level.
Application Notes: It is common to apply the switch on vessels where the material is normally
below the unit's range. Under such a condition the device loses echo, and if prolonged,
defaults to fail-safe operation. As this would be a normal occurrence, it is not advisable to
select the fail-safe high option. If the high level switch is being applied to a vessel within the
3 or 5 m range, a loss of echo and ensuing fail-safe condition would not be a common
occurrence and the fail-safe default could be used if required.
Fail-safe = 1, 2, or 3
①
High-high (e.g. 0.75 m)
②
Blanking (e.g. 0.5 m)
③
Range limit (e.g. 5.5 m)
④
High (e.g. 1 m)
Application Adjustment
Alarm function
Alarm setpoint
Fail-safe mode
Pointek ULS200
Operating Instructions, 01/2019, A5E32268616-AB
2 - high/high-high alarm
•
4 - high/Loss of Echo (LOE)
•
Set the high and/or high-high alarms to the desired values.
1 - high, except if the process range is beyond the device operating range
•
(3/5 m)
2 - low
•
3 - hold
•
Fail-safe = 2 or 3
①
High-high (e.g. 0.75 m)
②
Blanking (e.g. 0.5 m)
③
Range limit (e.g. 5.5 m)
④
High (e.g. 1 m)
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