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COPYRIGHT 2008, ALL RIGHTS RESERVED, Original Instructions
PERMA PURE LLC
Model 3300 User’s Manual
Doc. #532: Revision: 000
Page 7 of 14
Operation
A sample conditioning system supplies a clean, dry sample to the back panel of the Model 3300
Flow Control Drawer. The stack probe filter and sample pump performance are indicated by the
Flow Control Drawer Vacuum/Pressure Gauges.
Note: Please refer to the attached Model 3300 Flow Diagram for an example of an integrated
continuous emissions monitoring system flow schematic using the Model 3300 Flow Control
Drawer.
Flow from the conditioning system enters the Model 3300 Flow Drawer sample/calibration manifold.
Here, either sample or calibration gas (for direct calibration) can be directed to the atmospheric
pressure sample manifold and then on to the individual analyzer gas channels. Individual sample
flowmeters indicate the flow rate of each gas channel. A bypass flowmeter vents excess sample gas
not used by the continuous gas channels and also acts as an atmospheric vent.
The Model 3300 Flow Control Drawer has the ability to switch the sample and as many as eight (8)
calibration gases to the analyzer rack directly or via the total sampling system. This is done
through two (2) sets of solenoid valves: (1) the calibration gas solenoid valves which are mounted
on a common manifold at the rear of the drawer, and (2) the system/direct solenoid valves located
in the front of the drawer. A block & bleed solenoid valve, which prevents the manifolds from being
pressurized during sampling, is also part of the system/direct solenoid valve set.
The calibration function will only take place when both a calibration gas solenoid valve and either
the system solenoid valve or direct solenoid valve have been selected. In Local mode, the
calibration gas solenoid valves are cascaded, that is if there are more than one (1) calibration gas
solenoid valve switches in the on position, only the highest numerical calibration gas solenoid valve
will be active. This is not the case with computer control. The programmer can select any or all of
the calibration gas solenoids. Also, computer control is not allowed in the Local mode. While in the
Local/Direct Calibration mode, manual blowback is allowed, but not while in the Local/System
Calibration mode. While under computer control, blowback is allowed when nothing else is
activated, but not in any Calibration mode.
The Model 3300 has a provision for system bias checks. System integrity is verified by comparison
of calibration gas flow through the stack filter assembly to calibration gas flow directly to the gas
analyzers. This check indicates problems such as system leakage and gas component loss.
A probe filter blowback relay contact is provided on the Flow Control Drawer to facilitate Manual or
computer initiated blowback. For Blowback there is a 250V, 6Amp dry contact form C relay output
provided on the back panel for blowback implementation. There are two (2) vertical terminal block
assemblies on the back panel provided for computer interface. The 16-point terminal block is used
for computer control and the 40- point terminal block is used for computer verification of flow
control drawer operation.
Pressure Sensor Board Option
Upstream, (stack filter/and sample line) the pressure drop is actively monitored by a vacuum
transmitter, the sample gas flow is verified by a sample manifold pressure transmitter and
presence of adequate calibration gas is verified by a pressure transmitter on the calibration gas
manifold.
