PIDLOGGER - PID OPTIMIZATION
(for skilled personnel only)
The PID parameters are factory optimized for most of use. However it's possible to change them to best suite particular
conditions of:
- heavy load (heavier load means greater thermal inertia)
- fresh air on or off
To change the PID parameters hod down together
and
button for 6 seconds.
Insert the following parameter: proportional band at 40°C ("1 ??"), proportional band at 280°C ("2 ??"), integral time ("3 ???"),
derivative time("4 ???")
Set parameter values by pressing
to select digit and
to modify the value
By pressing
the parameters will be memorized otherwise if you hold down
for 2 seconds you will
exit from the parameter setting function.
Example of PID parameters
"1 10"
(proportional band at 40°C is +-10°C)
"2 05"
(proportional band at 280°C is +-5°C)
"3 150"
(integral time is 150 seconds)
"4 37"
(derivative time is 37 seconds)
The proportional band (BP) is calculated with linear interpolation. For example at 100°C it is:
BP@100°C = BP@40°C + (BP@280°C - BP@40°C) * (100 - 40) / (280 - 40) - 40) / (280 - 40)
DRYCONTROL - ON-OFF OPTIMIZATION
(for skilled personnel only)
To change the PID parameters hod down together
and
button for 6 seconds.
Insert the following parameter: setpoint_low (on the left) and setpoint_high(on the right)
?.?-?.?
Set parameter values by pressing
to select digit and
to modify the value
The parameter will be accepted if setpoint_high > (setpoi 0.5%RH)
By pressing
the parameters will be memorized otherwise if you hold down
for 2 seconds you will
exit from the parameter setting function.
The factory parameter of the ON-OFF humidity control are:
- setpoint_low = 4.5%RH
- setpoint_high = 5.0%RH
ERROR MESSAGES
The PIDLogger and Drycontrol warn when one of the following error is happened:
Err 1:
230Vac is not detected at the heating elements when the PID wants to heat the oven. Possible cause is an interruption of
the Solid State Relay (SSR)
Err 2:
230Vac is detected at the heating elements when the PID doesn't want to heat the oven. Possible cause is a short circuit
of the Solid State Relay (SSR). It's a dangerous condition because the oven heat without control and only the Alarm Set Point
can stop him.
Err 5:
Humidity control activated but the RH sensor is not inserted
Sahara DRY, 07/.2021
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