Emerson Process Management GmbH & Co. OHG
3-24
X-STREAM XE
Short Form Manual
HASXEE-SFM-HS
05/2017
3.8 Checking the Settings
Press
left
until SETUP is displayed, then
open LIMIT ALARMS - CONCENTRATION
3.8.5 Setting Concentration Alarms
Four concentration limits can be set for each
channel:
"Lo"
and "
Hi"
enframe the expected gas
concentration,
"LoLo"
equals or is below "
Lo"
,
"HiHi"
equals or is above "
Hi"
.
See the figure to the left for an explanation.
If you enter values for any threshold, the
above given order has to be considered. A
message is displayed, if an entered value
does not comply with this condition.
Note
!
If concentration alarms are not being used,
continue with
Should the measured concentration go be
-
yond one of the threshold levels (areas B, C,
D & E in the figure), a message is displayed in
the message line of the measurement display,
the
NAMUR pictogram appears (bell) and a
corresponding digital output is activated, if
assigned.
A hysteresis avoids oscillating alarms in
case the concentration is fluctuating around
a threshold.
Fig. 3-3:
Arrangement of Concentration Thresholds
Multi-channel unit:
Select the channel to be setup in SELECT
COMPONENT.
Ch1
Concentration
Alarm Monitor:
On
LoLo Level:
50.000 ppm
Lo Level:
100.000 ppm
Hi Level:
400.000 ppm
HiHi Level:
600.000 ppm
Hysteresis:
10.000 ppm
States..
Note!
HiHi and LoLo designate pre-alarms,
Hi and Lo designate main alarms.