Sensor Selection
You need to configure a controller to match the input device, which is normally a thermo-
couple or RTD. When you select an input device the controller automatically sets the input
linearization to match the sensor. It also sets high and low limits, which in turn limit the
range high and range low values.
Use Sensor Type 1
[SEn1]
and Input 1
[In1`]
(Input 1 Menu) to select the appropriate
sensor for input 1.
Range Low and Range High
The controller constrains the set point to a value between range high and range low. Range
high cannot be set higher than the sensor high limit or lower than range low. Range low
cannot be set lower than the sensor low limit or higher than range high.
Use Range Low 1
[rL1`]
and Range High 1
[rh1`]
(Input 1 Menu) to select or view values
for the corresponding input 1 parameters.
Figure 5.5 — Sensor ranges.
Low Limit of selected Sensor Range
High Limit of selected Sensor Range
Temperature
Range High Range (between High Limit of Sensor and Range Low)
Range Low Range (between Low Limit of Sensor and Range High)
Range Low
Range High
Wa t l o w S e r i e s 9 7
F e a t u r e s
■
5 . 5
