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Model
Indications that would require
Failure / replacement of controller.
Replacement of thermocouple element.
Controller’s loss of PID parameters leading to instability of the temp setpoint.
In the event that the control parameters are changed or in the event that a new controller is installed, it must be reprogrammed to suit the thermal characteristics of the instrument. The controller includes an Autotuning feature, which can be used to properly set the PID factors.
To start the Autotune procedure:
1.Press Sel until A7 (AT) is displayed
2.Press Data until value = 1 (enable Autotune)
While Autotuning, the decimal point LED will blink.
NOTE: During the procedure, it is normal for the temp to overshoot up to 100°C.
When the decimal point LED turns off, Autotune is complete. No further adjustment should be necessary.
Table 7 Temperature Controller Programming Guide
PRESS | DISPLAY | ACTION | |
SEL | P PROP BAND | UP/DOWN SET TO 5.0 (ENTER) | |
DATA | |||
|
| ||
SEL | i INTEGRAL | SET TO 50 | |
DATA | |||
|
| ||
SEL | d DERIVATIVE TIME | SET TO 15 | |
DATA | |||
|
| ||
SEL | AL LOW ALARM SETP | SET TO 300 | |
DATA | |||
|
| ||
SEL | AH HIGH ALARM SETP | SET TO 330 | |
DATA | |||
|
| ||
SEL | 7C CYCLE TIME | SET TO 2 (FOR FAST SYSTEM) | |
DATA | |||
HYS HYSTERESIS |
| ||
SEL | SET TO 0.3 | ||
SEL | LOC LOCK | 0 = OPEN 1 = LOCKED | |
| 2 = SV ONLY OPEN | ||
|
|
NOTE:
DO NOT SET THE TEMPERATURE (SV) HIGHER THAN 320oC.
05386 Rev. D | 33 |