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Chapter 4 Applications
4–1 Heat Only Control
with Dwell Timer
A
n oven is designed to dry products
at 150°C for 30 minutes and then stay
unpowered for another batch. A TEC-
8100 equipped with dwell timer is
used for this purpose. The system dia-
gram is shown as follows:
To achieve this function, set the fol-
lowing parameters in the setup menu:
INPT=K_TC UNIT=°C DP=1_DP
OUT1=REVR O1TY=RELY CYC1=18.0
O1FT=0.0 ALFN=TIMR ALFT=ON
Auto-tuning is performed at 150°C for this application.
4–2 Cool Only Control
A TEC-8100 is used to control a refrig-
erator at temperatures below 0°C. This
temperature is lower than the ambient,
so a cooling action is required. Select
DIRT for OUT1. Since output 1 is used
to drive a magnetic contactor, O1TY
should be set to RELY. A small temper-
ature oscillation is tolerable, so use ON-
OFF control to reduce the over-all cost.
To use ON-OFF control, set PB to zero
and O1HY at 0.1°C.
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