Campbell OBS-3A Manual descargar pdf (Pagina 9)

OBS-3A Turbidity and Temperature

Monitoring System

1. Introduction

The OBS-3A combines our OBS® probe with pressure, temperature, and

conductivity sensors in a battery-powered recording instrument. Batteries and

electronics are contained in a housing capable of operating at depths of up to

300 meters—depending on the pressure sensor installed.

Before installing the OBS-3A, please study:

• Section 2, Cautionary Statements

• Section 3, Initial Inspection

2. Cautionary Statements

• Although the OBS-3A is rugged, it should be handled as precision

scientific instruments.

• Maximum depth for the OBS-3A housing is 300 meters. Working depths

for individual instruments are limited by the installed pressure sensor. If

exceeded, the pressure sensor will rupture and the housing will flood.

• Bright sun near the surface (<2 meters) or black-colored sediments can

cause erroneous OBS readings.

• The OBS sensor must be kept clean to measure sediment concentration or

turbidity accurately.

• When cleaning the OBS-3A, do not use MEK, benzene, toluene, or

electronic cleaners as they could damage the OBS window.

• The conductivity sensor is very fragile and is enclosed in a hole behind the

OBS sensor. Do not poke it with any tool or object as the electrodes may

be damaged.

• Always put the OBS-3A in sleep mode when it will not be used for a while

to conserve battery capacity (see Section 6.12, Shutdown).

3. Initial Inspection

• Upon receipt of the OBS-3A, inspect the packaging and contents for

damage. File damage claims with the shipping company.

• Check this information against the shipping documents to ensure the

correct product is received (see Section 3.1, Ships With).

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Campbell OBS-3A Manual Pagina 9