manuel du moniteur de CO ambiant apma-370

Ambient CO Monitor - APMA-370

Measurement Component:

Features

• Cross-flow non-dispersive infrared detector; Low range: 0-5 ppm F.S.
• AS type (anti-shock) interference-compensating detector and purifier for reference gas.
• Reference gas purifier oxidizes CO to CO2 to eliminate interferences.
• Optics remain free of foreign matter with elimination of reflecting mirrors.

Principle

Cross-flow modulation non-dispersive infrared (NDIR) absorption technology.

Conventional technology uses an optical chopper to obtain modulation signals. Instead, the AFMA-370 uses solenoid valve cross flow modulation. Fixed amounts of the sample gas and the reference gas are injected alternately into the measurement cell. With the cross flow modulation method, if the same gas is used for both the sample and reference, interferences are minimized.

Specifications

• Principle: Cross flow modulation, non-dispersive Infrared (NDIR) absorption technology
• Application: CO in ambient air
• Range: Standard range: 0-10/20/50/100 ppm, 0-5/10/20/50 ppm
• Optional range: 5 ranges selectable from 0-100 ppm range within 10 times range.
• Range selection: Auto or manually ranges selectable. Can be switched by remote operation.
• Lower detectable limit: 0.02 ppm (30)
• Repeatability: ±1.0% of F.S.
• Linearity: ±1.0% of F.S.
• Zero drift: Information incomplete.