Watlow Controls Series 998, User Manual

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4.4
WATLOW Series 998 User’s Manual
Setup Menus, Chapter 4
Setup-Input
Rotronic Model H260 Capacitive Relative Humidity Sensor With the
Rotronic configuration, channel A is used to measure temperature and
channel B must be a process input with the Input 2 Linearization prompt
[Lin2] set to [H260] . The Series 998 provides temperature compensation
for the Rotronic sensor.
The humidify and dehumidify outputs (outputs 1B and 2B) are disabled
when the channel A temperature falls below -5˚F/-20˚C, or goes above
320˚F/160˚C. The relative humidity process display in the Display Loop
will display the error code
[E2`2]
for a low temperature error and
[E2`3]
if
the temperature is above the range high.
Temperature - Temperature
For temperature-temperature operation input 1 senses temperature for
channel A and input 2 senses temperature for channel B. The alarm out-
puts can be configured to trigger from either input. Also, the retransmit
option can be configured to retransmit either of the channel’s process
value or set point value.
NOTE:
See Input 2
Linearization
[Lin2] in this chap-
ter.