Analytical Technology A15 Especificaciones descargar pdf (Pagina 6)

O&M Manual

Rev-H (8/11)

Part 1 - Introduction

The Model A15/76 is an on-line monitoring system designed for the continuous measurement of

the turbidity of an aqueous stream. It is primarily intended for monitoring turbidity in drinking water or

wastewater effluent. The monitor provides display ranges from 0-4.000 NTU up to 0-4000 NTU. The

display range used for a given application is user programmable, and an auto-ranging feature allows the

display of high turbidity values, even when programmed for low range use. A15/76 monitors are designed

to operate on samples at temperatures from 0° to 50 °C and pressures of 0-100 PSIG. The measured

turbidity is displayed on a backlit liquid crystal display on the front of the instrument.

The sensor used in the A15/76 system measures turbidity using a 90-degree light scattering

technique. An infrared LED light source emanates from a planer surface and a detector in the same plane

measures light scattered at 90 degrees to the incident light beam. An automatic zero correction system

allows measurement of very low turbidity values with excellent zero stability. The sealed flowcell used for

low level measurements is designed to allow measurement of a pressurized sample in order to avoid

errors caused by bubbles formed when sample pressures are reduced.

For wastewater application, or where a submersible measurement is desired, the turbidity sensor

is supplied with a special holder to minimize ambient light effects. The submersible assembly eliminates

the need for sample pumps, and will operate at turbidity values up to 4000 NTU. For applications where

fouling is a problem, a special “Auto-Clean” version of the turbidity sensor is available. Contact your ATI

representative for details.

Figure 1 - Turbidity System w/Submersion Sensor

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Analytical Technology A15 Especificaciones Pagina 6