OPERATION DESCRIPTION
z
Set Value Setting:
In basal display status, if the parameter lock “Loc” isn't locked, we can set
setpoint (SV) by pressing
、
or
. Press
key to decrease the
value,
key to increase the value, and
key to move to the digit expected
to modify. Keep pressing
or
, the speed of decreasing or inscreasing
value get quick. The range of setpoint is between the parameter SPL and SPH.
The default range is 0~400.
z
Parameter Setting:
In basal display status, press
and hold for about 2 seconds can access
Field Parameter Table. Pressing
can go to the next parameter; pressing
、
or
can modify a parameter. Press and hold
can return to
the preceding parameter. Press
(don't release) and then press
key
simultaneously can escape from the parameter table. The instrument will
escape auomatically from the parameter table if no key is pressed within 30
seconds. Setting Loc=808 and then press
can access System
Parameter Table.
●
AI artificial intelligence control and auto tuning
When AI artificial intelligence control method is chosen (CtrL=APId), the PID
parameters can be obtained by running auto-tuning. In basal display status,
press
for 2 seconds, the “At” parameter will appear. Press
to change
the value of At from “oFF” to “on”, then press
to active the auto-tuning
process. During auto tuning, the instrument executes on-off control. After 2-3
times of on-off action, the instrument will obtain the optimal control parameter
value. If you want to escape from auto tuning status, press and hold the
key for about 2 seconds until the "At" parameter appear again. Change “At”
from “on” to “oFF”, press
to confirm, then the auto tuning process will be
cancelled.
Note 1:
If the setpoint is different, the parameters obtained from auto-tuning are
possible different. So you’d better set setpoint to an often-used value or
middle value first, and then start auto-tuning. For the ovens with good
heat preservation, the setpoint can be set at the highest applicable
temperature. Depending on the system, the auto-tuning time can be
from several seconds to several hours.
Note 2:
Parameter Ctl (on-off differential, control hysteresis) has influence on the
accuracy of auto-tuning. Generally, the smaller the value of Ctl, the
higher the precision of auto tuning. But Ctl parameter value should be
large enough to prevent the instrument from error action around setpoint
due to the oscillation of input. Ctl is recommended to be 2.0.
Note 3:
The instrument has the function of self-learning. It is able to learn the
process while working. The control effect at the first run after auto tuning
is probably not perfect, but excellent control result will be obtained after a
period of time because of self-learning.
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