PRESYS
Instruments
PCON-Y17
Page 19
NOTE: It is not possible to close the output isolation valve or to maintain it closed
if the pressure inside the control module is larger than the pressure outside the
control module by 100 psi or more.
The 3000 psi pressure control range does not
have an outlet isolation valve.
c) Stabilization Settings
When the controlled pressure is within the limits established by the Stabilization
Settings, its reading value is shown in
green (stable)
. When it is outside, it is shown in
red (not stable)
.
You can configure the
Error Window
(± value in the current unit of pressure) that
a stable pressure reading can deviate from the setpoint value,
and the
Minimum Time
(in
seconds) the pressure reading must be inside these limits to indicate stable.
Press the
SETTINGS
button and select the
CONTROL
tab shown below, e
dit the
values in
Stabilization Settings
and press the
APPLY
button.
Fig. 18
- Stabilization Settings
d) Control Settings
PCON-Y17 has three different Control Modes that define the controller output
behavior when the setpoint is changed:
Linear
,
Auto
and
Max
.
Linear
: the output varies linearly according to the parameter
SP Rate
(Pressure
Unit / second)
. The controlled pressure will be closer to the linear behavior for
lower values of pressure rate, protecting the instrument under test from
overshoot.
Auto
:
for positive steps, the controlled pressure varies exponentially with pre-
configured parameters (not user configurable), protecting the instrument under
test from overshoot.
Max
:
the fastest control mode, but may produce overshoot of the controlled
pressure.
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