Emerson Process Management GmbH & Co. OHG 3-33
X-STREAM X2FD
Instruction Manual
HASXMDE-IM-EX
01/2015
3
Startup
• Defi ning high pre-alarm and main alarm
Standard mode:
An alarm results in the assigned relay being
activated.
Settings:
• Level 1 > Level 2
• Level 1-Function: High
• Level 2-Function: High
If an alarm is active, a corresponding mes-
sage is displayed in line 4 of the measurement
display.
Failsafe mode:
An alarm results in the assigned relay being
deactivated.
Settings:
• Level 1 > Level 2
• Level 1-Function: High FS
• Level 2-Function: High FS
Fig. 3-4: High pre-alarm and main alarm
3.9 Checking the settings
If two upper limits are set with one limit higher
than the other, a pre-alarm is triggered when
the measured concentration exceeds the fi rst
limit (area B). If no corrrective measures are
taken and the concentration exceeds the se-
cond limit (area C), a main alarm is triggered.
Up to two alarms may be active per channel
at any one time.
Concentration
Activated
Time
Concentration level
Pre-alarm limit
Main alarm limit
Deactivated
Activated
Deactivated
Activated
Deactivated
Activated
Deactivated
ABC
On
Off
Relay condition
Standard mode
Failsafe mode
Status message on front panel
Main alarm rising
Pre-alarm rising
Main alarm rising
Pre-alarm rising