Fig. 3-3: Limits Defi Ning A Window For Valid Concentrations - Emerson ROSEMOUNT Xstream X2 Series Instruction Manual

X-STREAM X2FD
Defi ning a window
•
If a window between an upper and a lower
limit is defi ned, an alarm is issued when the
concentration exceeds the upper level (area
D) or drops below the lower limit (area B).
Only one alarm can be active per channel at
any one time.
Standard mode:
An alarm results in the assigned relay being
activated.
Settings:
Level 1 > Level 2
•
Level 1-Function: High
•
Level 2-Function: Low
•
Failsafe mode:
An alarm results in the assigned relay being
deactivated.
Settings:
Level 1 > Level 2
•
Level 1-Function: High FS
•
Level 2-Function: Low FS
•
If an alarm is active, a corresponding mes-
sage is displayed in line 4 of the measurement
display.
3-32
3.9 Checking the settings
Relay condition
Status message on front panel
Fig. 3-3: Limits defi ning a window for
valid concentrations
A B
Activated
Deactivated
Activated
Deactivated
Standard mode
Activated
Deactivated
Activated
Deactivated
Failsafe mode
On
Off
Emerson Process Management GmbH & Co. OHG
Instruction Manual
HASXMDE-IM-EX
01/2015
C D
Upper limit
Lower limit
Time
Concentration level