West Control Solutions N8800 - Manual (Page 71)

7.2.2 Configuration:
Oxygen measurement
Oxygen measurement with heated lambda probe
Controller r Process value processing r 7: O
2
functions with constant probe
temperature
Cntr r C.tYP 7 O2-const
Oxygen measurement with non-heated lambda probe
Controller r Process value processing r O
2
functions with measured probe
temperature
Cntr r C.tYP 8 O2+temp
Input 1 r Function INP1 r 7: process value X1
InP.1 r 1.Fnc 7 X1-Input
In input 1, the sensor type is set for one of the high-impedance voltage inputs:
Input 1 r Sensor type r 42: special (-25...1150 mV) or
41: special (-2,5...115 mV)
InP.1 r S.tyP 41 115 mV
InP.1 r S.tyP 42 1150 mV
Input 1 r meas. value correction r 0: no correction
InP.1 r S.Lin 0 no
Temperature measurement (required with non-heated lambda probe)
Any temperature measurement with one of analog inputs INP2 or INP3 can be
used. Select input X2 during function selection (second set-point).
g
With O
2
measurement, evaluation in ppm or % must be specified for all
parameters related to the process value.
This is done centrally during configuration.
Other r Parameter unit for O
2
r 0: parameter for O
2
function in ppm
1: parameter for O
2
function in %
othrr O2 0 unit : ppm
othrr O2 1 unit : %
g
Whether the temperature of the non-heated λ probe is specified in °C or °F can
be selected during configuration.
Other r Unit r 1: in Celsius
2: in Fahrenheit
othrr Unit 1 °C
othrr Unit 2 °F
Special functions
8800 process controller 71 O
2
measurement