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Emerson Process Management GmbH & Co. OHG 5-27
X-STREAM X2
Instruction Manual
HASX2E-IM-HS
02/2012
5
Startup
5.7 Checking the Settings
5.7.4.1 References to the Accuracy of the Analog Outputs
Scaling or zooming relates to the analog
outputs only and does not affect front panel
display nor serial (Modbus) interface output
of measuring results!
X-STREAM analyzers are shipped with pre-
dened physical measuring ranges, as listed
e.g. in the INFO-RANGES.. menu (parame-
ters „MinRange“ and „MaxRange“):
All specications like repeatabi-
lity, drift, etc. ( tables 3-7 and
3-8, page 3-18) are related to these
physical measuring ranges only!
Scaling or zooming cannot im-
prove analog output specica-
tions to values better than spe-
cied by the physical measuring
ranges!
Furthermore the tables apply only to analog
output scaling meeting the form „0 ... MinRan-
ge“ to „0... MaxRange“ (means always 0 as
"LowScale" value)!
If "LowScale" is set to a value other than 0,
specications are not longer applicable to
analog outputs! The same applies to the
zoom parameter "Position" ( previous
page), if set to HighScale!
Example
Analyzer data:
MinRange: 500 ppm
MaxRange: 5000 ppm
Low
Scale
High
Scale
Statement
Scaling
settings,
where tables
are applicable
0 500
Parameter "LowScale"
is 0 and
"HighScale" within the
limits of "MinRange"
and "MaxRange"
0 1000
0 2375
0 5000
Scaling
settings,
where tables
are NOT
applicable
100 500
Parameter "LowScale"
different 0
500 1000
375 2500
4000 5000
0 300
Parameter "HighScale"
lower than "MinRange"
0 5100
Parameter "HighScale"
higher than "MinRange"
Tab. 5-2: Analog Outputs - Scaling (examples)