Emerson Process Management GmbH & Co. OHG
3-21
X-STREAM XE
Short Form Manual
HASXEE-SFM-HS
05/2017
3
Startup
Signal:
Comp1
OutRange:
0-20 mA
Low Scale:
0.00
High Scale:
100.00
AutoScale:
Yes
FailMode:
High +10%
0/4 mA:
0.00
20 mA:
100.00
Hold:
No
3.5.7 Checking the Settings
Next, select the output range:
• 0-20 mA
(dead zero) generates a 20 mA
signal, if a concentration is measured at
the upper limit of the signal range. A 0 mA
signal is generated if the sample gas con-
centration equals the value specified with
"
LowScale
" .
•
4-20 mA
(life zero): A 4 mA signal is gener-
ated if the concentration equals the value
specified with "
LowScale
", thus enabling to
detect e.g. a broken cable.
"
FailMode
" selects the output´s behaviour un
-
der failure conditions, considering or not, the
NAMUR recommendation NE 43. NE 43 defines
output signals enabling to detect different types
of failures/status (
table 3-1): The related
information is transmitted as a current signal,
but outside the (0)4-20 mA measurement signal
range.
Available options:
Track
: NE 43 not considered.
HIGH +10%
: NE 43 failure signal level:
"above".
LOW -10%
: NE 43 failure signal level:
"below".
Note!
The related outputs signals can be finetuned
on a second menu page, if
"FailMode"
is set
to other than
Track
(
next section).
Enter a concentration, to equal the low output
limit (0 or 4 mA)
Enter a concentration, to equal the high output
limit (20 mA)
Enable (
Yes
) or disable (
No
) output autoscal-
ing.
Note!
Factory setting is "
Outrange:"
4-20 mA
and
"
FailMode:"
LOW - 10%
, unless ordered
otherwise.
