Tw Control Performing An Autotune - Conair Thermolator TW-1 User Manual

The controller has three pre-configured tuning parameter sets,
one of which should allow optimum temperature control.
Following is a description of each of the choices available to
an operator:
Slow Responding system:
Select the slow setting "SLO" for large systems*. More than
1,700 pounds (200 gallons) of water and more than 14,000
lbs of steel might be considered a large system. This setting
has the smallest proportional band (5ºF), which allows larger
changes in the control output when the process temperature is
far from setpoint. This should reduce cycling around the set-
point.
Normal Responding System:
Normal "nOr" is the factory default tuning setting, as it will
cover the majority of applications. This setting is appropriate
for systems* with 250 to 1,700 pounds (130-200 gallons) of
water and 1,000 to 14,000 pounds of steel. The default value
for the normal proportional band is 10ºF.
Fast Responding System:
Select the fast setting "FSt" for small systems*. Less than 80
pounds of water (10 gallons) and 1,000 pounds of steel might
be considered a small system. This setting has the largest pro-
portional band (15ºF), which allows a fast response to small
deviations between the process variable and setpoint. This
system is typical for small thermolators with small molds or
other process machinery. If improperly set up, the configura-
tion might cause oscillation around the setpoint temperature.
Setup Menu
To access the Setup Menu,
1
Press and hold the "enter" key for approximately
five seconds, until the service menu is active.
2
Toggle the Up/Down keys until "PiT" is dis-
played. Press the "enter" key once to see the cur
rent tuning setting.
3 Toggle the Up/Down arrow keys to the desired
SLO, nOr or FSt setting. Press "enter" again to
save this value. If at any time no key is pressed for 10
seconds the control will return to "Home Page", dis-
playing the process variable. If the unit is in any alarm
condition, you must clear it before you can adjust the
tuning selector.
UGH025-0504 Thermolator TW Series
TW C
ONTROL
P
ERFORMING AN
A
UTOTUNE
NOTE: Normal parame-
ter is the factory default
setting
O
PERATION
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