Keller ITS CellaPort PT 120, Operating Manual, Page: 21 / 72

Operating manual PT 11x, 12x,13x
15
13.1.3 Temperature offset using linear interpolation
When necessary, CellaPort PT allows you to program an offset for the
temperature reading reported. The offset correction can be configured
individually with a minimum of 2 and a maximum of 10 interpolating
points (X/Y nodes). This information is stored in a user-defined tempera-
ture-indexed lookup table and used for signal conditioning. For values
lower than the 1st node and higher than the last node, the first and last
linear segments are extrapolated. Enter the nodes in ascending order.
Use the rear panel display to access this function via
C001
/
LIN.1.
Source of extraneous radiation
Example: furnace 950 °C
Target object T
O
= 900 °C
Emissivity
e
< 1
Reflection
s
> 0
Furnace radiation T
Back
= 950 °C