Siemens SITRANS L Pointek ULS200 - High Level Alarm Switch Example

Pointek ULS200
Operating Instructions, 01/2019, A5E32268616-AB 27
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
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)
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
• 2 - high/high-high alarm
• 4 - high/Loss of Echo (LOE)
Alarm setpoint
Set the high and/or high-high alarms to the desired values.
Fail-safe mode
• 1 - high, except if the process range is beyond the device operating range
(3/5 m)
• 2 - low
• 3 - hold