Casella Evolution CM2010 Посібник з експлуатації - Сторінка 11

Переглянути онлайн або завантажити pdf Посібник з експлуатації для Вимірювальні прилади Casella Evolution CM2010. Casella Evolution CM2010 16 сторінок. Internal zero and span module ozone analyser

Друкувати сторінку

5. Reinstall the scrubber in the analyser. Secure the Velcro strap and reconnect the pneumatic fit-

ting.

6. Turn the analyser pump back on.

Disposable Filtration Unit (DFU) Replacement

The zero air from the scrubber is filtered by the disposable filtration unit (DFU) to prevent contamination

of the pneumatics and reaction cell. Failure of the DFU could result in poor zero readings or loss of

purge/supply air to the IZS. This filter is connected to the top of the charcoal scrubber. Replace the filter

annually or whenever it begins to discolour.

To replace the filter:

1. Turn off the pump.

2. Remove and retain the Kynar nuts from both ends of the DFU.

3. Remove and replace the DFU, ensuring that the direction of flow is correct.

4. Reinstall the Kynar nuts, ensuring that the ferrules are properly installed in the nuts.

5. Turn on the pump.

Purge Filter and Orifice

The purge orifice ensures that sufficient air is continuously drawn through the span chamber to prevent

saturation of the permeation chamber with O

sure proper operation.

Recommended Equipment:

1. Turn off the pump.

2. The purge filter is in one arm of the Kynar tee connected to the outlet of the span chamber. Us-

ing the orifice removal tool, remove and replace the filter. Be sure to use a new O-ring when

installing the new filter, and orient the filter with its threaded port facing outward.

3. The purge orifice is in one arm of the Kynar tee connected to the exhaust line inside the rear of

the analyser. Using the orifice removal tool, remove and clean or replace the orifice. Be sure to

use a new O-ring when reinstalling the orifice, and orient the orifice with its threaded port facing

outward.

4. Turn on the pump.

5. Perform the flow test described below after cleaning or replacing the filter or orifice.

HB4014-02

EVOLUTION SERIES CM2010 OZONE ANALYSER

. Replace the filter and check and clean the orifice to en-

Orifice/filter removal tool (P/N 98000190)