Emerson ROSEMOUNT Xstream X2 Series - Page 84

Emerson Process Management GmbH & Co. OHG 3-25
X-STREAM X2FD
Instruction Manual
HASXMDE-IM-EX
01/2015
3
Startup
The last line on this menu allows the zoom
function of the analog output to be set when
that output has been assigned the Zoom
signal.
This function allows a part of the signal range,
specifi ed by “LowScale” and “HighScale”, to
be “magnifi ed” on the analog output. Unlike
the scaling function, here the output is swit-
ched automatically, the moment the switching
point concentration is reached.
The “ LowScale” and “HighScale” parame-
ters allow a concentration value to be set to
correspond to the lower (0 or 4 mA) or upper
signal value (20 mA). The limits for these
parameters are given by the "MinRange" and
"MaxRange" parameters, specifying the phy-
sical measuring ranges of each instrument.
Concentrations outside the range defi ned by
"LowScale" and "HighScale" are not suppor-
ted by an analog output.
Note!
Scaling may affect the analog outputs
accuracy!
Carefully read the information, given on (
page 3-28 before scaling analog outputs!
Signal: Comp-1
LowScale: 0 ppm
HighScale: 1000 ppm
Zoom..
gpp

Zoo
m.
.
3.9 Checking the settings
Output signal
MaxRangeLowScale
= 0
HighScale
<>
MaxRange
scaled output
default output
HighScale
=
MaxRange
LowScale
<> 0
0
Output signal
scaled output
default output