PERMA PURE LLC
Model 3300 User’s Manual
Doc. #532: Revision: 000
Page 8 of 14
Local Mode Operation
To enter the Local mode, toggle the Remote/Local switch to the right. While in the Local mode, the
operator can perform manual calibrations and blowback.
The flow control drawer is in Local Control when the Local Switch is selected, the red LED is on and
the green Sample LED is on as well. In this mode, all switches on the front panel are enabled for
local operator control and Computer Control is disabled. All Calibration Gas (CG) functions,
Direct/System, and blowback are available for the local operator. When the Local LED is OFF, the
PC or PLC has control and can remotely duplicate local control functions. The Local Switch provides
an output to the PLC/PC to indicate that the Flow Control Drawer is offline, (i.e., the analyzers’
outputs are not reliable).
CONTROL FUNCTIONS:
Switches Sample
Blowback
Direct
Calibration
System
Calibration
Local
X
X
X
Direct
X
System X
Blowback X
Cal Gas 1-8
X
X
Manual System Calibration:
To perform manual system calibration, toggle the Direct/System switch
to the right. Then toggle any of the Calibration Gas switches to the right. This will allow the
selected calibration gas to flow to the analyzer suite via the total sampling system. In this mode,
manual blowback is not allowed.
Manual Direct Calibration:
To perform manual direct calibration, toggle the Direct/System switch to
the left. Then toggle any of the Calibration Gas switches to the right. This will allow the selected
calibration gas to flow to the analyzer suite directly, bypassing the total sampling system. In this
mode, manual blowback is allowed.
Manual Blowback:
To perform manual blowback, depress the Blowback switch to the right. This
switch is a momentary switch, that is, it will return when released. When the operator toggles the
Blowback switch, two things happen; first, the blowback relay will be activated, and second, the
direct solenoid valve will be activated. With the direct solenoid valve activated, the analyzer suite
will be protected from blowback pressurization.
Computer Control Mode Operation
Computer Control (CC):
To enter Computer Control mode operation the Remote/Local switch must
be toggled to the left. Computer control is initiated through the 16 Position vertical terminal block
on the back panel. To activate a particular function, 5VDC is applied to the appropriate terminal.
The Remote and Local functions are identical. This can be done in one of two ways. The first way is
to take the +5 VDC from terminal 10 or 12, pass it through a set of dry contacts on a computer
controlled relay, and back to the appropriate terminal. The second way is to take +5VDC directly
from the computer control to the appropriate terminal. For this method, please note that the flow
control drawer GND on Terminal 14 and 16 must be connected to the GND on the computer control
unit, to electrically reference both systems together.
