Chemcassette® Detection System - Honeywell Vertex VC 4 User Manual

Chemcassette® Detection System
The Chemcassette® detection system is included on an analyzer plate on top of the Vertex™ VC4. The Analyzer
module is a self-contained, microprocessor-controlled analyzer. Sample lines and the vacuum source are
connected to the Chemcassette® via a single 5-tube connector to develop a better stain for better sensitivity
and reliability.
The system powers up in the same state as when powered down. Data is stored in the module's memory until the
data acquisition computer retrieves it.
The Vertex™ VC4 Analyzer module use the Honeywell Analytics Chemcassette® optical detection system. Analyzer
module sample and detect a specific gas or family of gases.
Each Analyzer module manages Chemcassette® tape transport, provides optical detection of stain, directs sample
flow through the Chemcassette® to develop a better stain for better sensitivity and reliability, stores event data for
retrieval by the data acquisition computer.
Components of the detection system include:
• Chemcassette® detection tape
• Optics and electronics for the detection system
• Chemcassette® tape transport mechanism
• Manual adjustment needle valve
Detector Optics
The heart of the Chemcassette® module is an optical detection system that measures a stain that develops on the
Chemcassette® tape in the presence of a target gas.
Stain Pattern
The following chart shows the stain pattern of sample detection on the Chemcassette® tape.
When monitoring a location, the system detects and measures a specific gas or a family of gases in the sample.
The microprocessor in the analyzer module interprets the data and responds appropriately.
In the Closed Loop Optics (CLO) detection system, a reference detector monitors and controls the intensity of
the LED.
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