1
6
2. Press
the
INDEX
key until
tun
appears on the display.
tun
is
where the type of tuning choice is selected. There are five
options to choose from.
•
SELF
allows the controller to evaluate the process and select its
own PID values to maintain good control. This is the
recommended choice since all systems react differently. If
SELF
is selected, the following two menu items will appear.
•
Lern
-- select
YES
or
no
.
YES
starts the learning process, and finishes by reverting to
no
.
no
will keep the present variables.
•
dFAC
is the damping factor that sets the ratio of Rate to
Reset for the
SELF
mode. For a fast
response
process, the value should be lowered. For a slower
process, the value should be increased.
•
Pid
allows manual adjustment of PID values. This option
should only be selected if the end user has an understanding of
how a PID system works. If
Pid
is selected, the following menu
items will appear.
•
Pb1
is the proportional band. Select
1
to
9999
.
•
rES
is the automatic reset time. Select
OFF
,
0.1
to
99.9
minutes. Select
OFF
to switch to
OFS
.
•
OFS
is the manual offset correction. Select
OFF
,
0.01
to
99.9
%. Select
OFF
to switch to
rES
.
•
rtE
is the rate.
•
SLO
presets PID values for a slow response process on a default
system.
•
nor
presets the PID values for a normal response process on a
default system.
•
FASt
presets PID values for a fast response process on a default
system.
3
. Use the
UP ARROW
and
DOWN ARROW
keys to change the
value.
4
. After a value is selected, press
ENTER
to retain that value.
Input Calibration
1. Press
the
UP ARROW
and
ENTER
keys to enter the
Secondary Menu.
