Campbell OXYGUARD TYPE III CS512 Manual de usuario descargar pdf (Pagina 11)

User Manual

3. Optional Sensor Accessories

009994 — PT4 Agitator for stagnant conditions

010315 — DO electrolyte, 1 litre

010314 — Membrane kit, 10 membranes

4. Optional Agitator – available to special order only

The PT4 Agitator is a reliable and robust agitator for use in conjunction with sensors

subjected to bio-fouling in ponds and stagnant water conditions.

sensors require a minimum water velocity across their membranes to function

properly. Therefore, to measure DO in stagnant water conditions, it is necessary to

move the water past the membrane to get accurate and reliable DO measurements. In

many instances the water also has a high bio-loading and the sensors become fouled

resulting in inaccurate DO measurements.

Figure 4-1. Preventing Bio-fouling of the CS512

The PT4 Agitator overcomes these problems. The device is designed so that a soft

bristle brush sweeps across the sensor membrane or sensor tip. This sweeping action

of the brush provides the required water velocity as well as prevents the membrane

from becoming bio-fouled.

The optimum sweeping frequency depends upon the design of sensor and type of

membrane used and water conditions. An ON-time of 0.25 seconds and OFF-time of

5 seconds is suitable in most circumstances.

Agitator’s overall size: 180mm x 83mm, diameter, 0.6 kg (7-1/8" x 3-1/4", 1-1/4 lb).

Supplied with 3 metres (10 ft.) cable.

Power required: 10.5 to 18 VDC at the agitator, 1.1 amps. Maximum ON-time is

3 seconds.

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Campbell OXYGUARD TYPE III CS512 Manual de usuario Pagina 11