Note: Vref can be AC or DC. It depends on the type of the relay it power
7. Device Application Example
a) User wants to control temperature (T) of a furnace, and 0 ~ 1000 deg Celsius sensor range is
required. Furnace is wanted to be maintained at 800 deg C. Alarm1 will go off if T>850 deg C,
and Alarm2 will go off if T<750 deg C. System power supply is AC110V. Installation opening is
45x45(mm). SSR will be used to control the heating element.
b) Choose JLD612 with a K-type thermocouple.
c) See figure for connection diagram.
d) Parameter setting:
(Inty)=
K; (SV)=800 deg C;
(outy)=2; (AH1)=850 deg C;
(Hy)=0.3; (AL1)=848 deg C;
(psd)=0; (AH2)=750 deg C;
(rd)=0; (AL2)=752 deg C;
(CorF)=0;
(auto-tuning is used to set PID parameters)
e) Power up the controller. Keep pressing (>) to activate auto-tuning. When “AT” stop blinking,
new PID parameters are generated and recorded for the system. The controller back to
normal operation mode and the furnace temperature will stay at 800 deg ‘C.
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