Normal Controller Operation
6-2
Thermo Scientific
This chapter provides brief instructions on how to perform the following
configuration changes:
• Setting the temperature
• Setting the Over-temperature Protection Temperature
• Changing between celsius and fahrenheit
• Setting the ramp to setpoint time
• Autotuning the controller
Detailed instructions on configuring the temperature controller are found in the
UT150 operation manual.
For instructions on the Controller -PC Communication Option, refer to
.
Normal Controller Operation
The Temperature Controller senses the chamber air temperature of the furnace
(the PV, or process value) and supplies the heat necessary to achieve the desired
setpoint. The controller includes an LED display and a push button keypad. Refer
for lists of displayed parameters and keypad
functions.
Table 2. UT150 Parameter Functions
Operating Parameters (access by holding the SET/ENT button)
Parameter code
Factory
set value
Description
A1
1225.0
Alarm Setpoint (°C,2237 °F)
CtL
Pid
Control mode
At
oFF
Auto tuning
P
20.0
Proportional band (°C, °F=16.2)
I
120
Integral time
d
30
Derivatives time
Ct
1
Heat cycle time
FL
oFF
Sensor filter
bS
0.0
PV bias (offset)
Loc
0
Key loc
Setup parameter (access by setting LoC = “-1”)
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