19
Learn the Valve
Caution
The procedure for learning the valve involves cycling the valve from the open to the
closed position. Be certain that the system can withstand valve cycling before
proceeding.
This test can be performed prior to installing the device and the valve in your system.
Entering the [
J
] command to learn a valve calibrates the valve
.
The valve moves from fully open to fully
closed, and then stops at the completion of the calibration procedure.
The [
J
] command learns the valve’s open and closed positions.
Learning the valves open and closed positions is usually only necessary after mechanical or electrical repairs
have been made in the field. This LEARN function will have already been performed when receiving a valve
from the factory.
The [
Q
] command stops the LEARN function.
Note
Be sure to first select (
JT type
) for the correct valve type above, otherwise the unit will not
function properly.
Setting the Pressure Control Mode
The [
V value
] command sets the full scale voltage range for the pressure sensor input, where:
value:
0 = Model Based Tuning
1 = PID
To query the current control mode setting, issue the request:
R 51
The controller responds with the message [
V
value
], where:
value
: 0 = Model Based Tuning
1 = PID
Setting the Pressure Units
The [
F value
] command identifies the units for the device, where:
value
:
00 = Torr (initial)
01 = mTorr
02 = mBar
03 = µBar
04 = kPa
05 = Pa
06 = cm H
2
0
07 = in H
2
0
To query the current pressure units, enter:
R 34
