6
Getting Started
Getting Started
Getting to Know Your Pressure Controller
The Pressure Controller Display
The figure below identifies the various features of the main pressure controller display.
Highlights
pressure
in the center of the display.
Tares the pressure
(typically unavailable for abso-
lute pressure devices) (
).
Opens a menu to set the
pressure control setpoint
(
Enters the main menu system (
Toggles the backlight
✓
Note:
Buttons 4 and 5 have no functions on the main display for pressure devices.
Status Messages
Status messages are shown to the right of the main readout number. In the example to
the right the
LCK
message indicates that the front display is locked.
ADC
Analog-digital converter error
EXH
Exhaust mode active
HLD
Valve hold active
LCK
Front display is locked
POV
Pressure over range of device
Mounting
Pressure controllers do not require straight runs of pipe upstream or downstream. Most
pressure controllers can be mounted in any position, including upside-down. Corrosive-re-
sistant pressure controllers use media-isolated sensors that must be tared after changing
their orientation.
▲
Caution:
Pressure controllers that use large Rolamite valves (PCRD, PCRD3, PCRDS)
should be mounted with their valve oriented vertically (right-side up). Please contact
Alicat for other orientations.
Filters
When pressure drop is not a concern, use in-line sintered filters to prevent large particulates
from entering the pressure controller. Suggested maximum particulate sizes are as follows:
• 20 microns
for PCD, PCPD, PCHD, PCD3
• 40 microns
for PCRD, PCRD3
The
main display
. Note the button
behind the logo, which toggles the
device backlight.
The
main menu
with valve position
information, and a
LCK
status.
