Parr Instrument Model A2200E - Manual (Page 8)

Flow Controller
P a r r I n s t r u m e n t C o m p a n y 8
Instructions for the A2200E Flow
Controller
Each A2200E can be supplied with up to four I/O’s.
These I/O’s are used to interface the Mass Flow Con-
trollers on the corresponding reactor system.
The AUTO/MAN key is used only during the pro-
gramming process. It is used to “set” a new value
for a displayed variable. It is also used for other
functions within the meter not specific to the appli-
cation of the A2200E.
The Up and Down Arrow keys are used to increment
values for each displayed variable.
The Return key (circular arrow) is used for navigat-
ing through each variable in the different mode
menus.
In operation mode on the normal operating display,
the PV indication relates to the flow value transmit-
ted from the Mass Flow Controller. As supplied the
PV value represents the flow in units of SCCM (Stan-
dard Cubic Centimeters per Minute; where standard
is 0 °C and 1 ATM.
The SP indication displays the current set point
value which relates to a scaled linear output voltage
or current transmitted to the corresponding mass
flow controller.
The set point can be changed by pressing the Return
key (Circular Arrow) once while in the operation
mode. SP will now be displayed in the SP position.
Use the Up or Down arrow key to select the flow
rate you would like to use. Pressing the Return key
will return the display to normal operation.
In modes other than operation, the SP display indi-
cates a specific variable and the PV display indicates
the current value for that variable. If the PV display
is flashing the current value displayed has not yet
been set and this is done using the AUTO/MAN key.
Each unit is locked with pre-programmed specifica-
tions. For troubleshooting or making changes to the
programming follow the instructions below.