Fig. 6-3: Low And Low-Low Alarm Mode - Emerson Rosemount Xstream Series Instruction Manual

Instruction Manual
HASAxE-IM-HS
05/2006
Setting "LOW" and "LOW-LOW" alarms
•
Setting the one threshold below the allowed
level and the second threshold below the first
threshold (fig. 6-3) results in an operation mode
which gives a prealarm ("LOW alarm") when
the current concentration falls below the "low"
threshold level (area "B"). Also, a main alarm
("LOW-LOW alarm") is activated if no correc-
tive action was performed and the current
concentration falls below the "low-low" threshold
level (area "C").
Up to two alarms can be activated at a time for
each channel!
Standard mode:
If an alarm is activated, the corresponding
alarm outputs a "High" level signal.
Settings:
Level 1 > level 2
•
Level 1 function: Low
•
Level 2 function: Low
•
Fail-safe mode:
If an alarm is activated, the corresponding
alarm outputs a "Low" level signal.
Settings:
Level 1 > level 2
•
Level 1 function: Low FS
•
Level 2 function: Low FS
•
As long as any alarm is activated a status
message appears in the measuring screen's
th
4 line.
Emerson Process Management GmbH & Co. OHG
6-2 Checking the Instrument's Setup

Fig. 6-3: LOW and LOW-LOW alarm mode

X-STREAM
6-17