Anderson LA Series Руководство по эксплуатации - Страница 16

Просмотреть онлайн или скачать pdf Руководство по эксплуатации для Передатчик Anderson LA Series. Anderson LA Series 18 страниц. Level transmitter

AGE

Section 3 Maintenance and Troubleshooting

Required maintenance of the LD/LA transmitter includes a yearly calibration program. In

addition, a visual check of the diaphragm and gasket should take place at minimum-6 month

intervals. Small dents in the diaphragm will cause a "pre-load" or positive zero offset, which

generally can be adjusted out. Larger dents, creases, or punctures are very detrimental and

may require a complete repair or replacement.

NOTE:

The transmitter should be left in place for normal cleaning operations. Removal of the

unit opens risk for damage to the diaphragm area. If the transmitter must be removed,

a protective cap should be immediately placed over the diaphragm area. Be sure that

the cap does not press on the diaphragm directly.

•

The transmitter has been designed to withstand typical process environments

including cleaning and washdown. Electronics are self compensating for changes

in process temperature, and provide a linear, repeatable output signal.

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For proper operation, be sure that the diaphragm (sensing) portion of the unit

remains free from damage. This portion should be well protected if the transmitter

is removed from the process.

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A typical "Zero" adjustment should be performed at one (1) year intervals.

To maintain proper accuracy, Anderson recommends yearly ZERO signal (4.00 mA) checks. A

record of these readings will help to maintain a consistent schedule. If re-zeroing does not

correct inaccuracies seen in the receiver, calibration of the receiver itself should be performed.

Consult associated manuals for your individual equipment.

WARNING:

Unless performing full calibration of the unit, do not adjust the "SPAN". This

adjustment is Factory set. Testing of the transmitter "SPAN" will require stepping

through one of the procedures outlined in the Calibration section (section 2) or the

use of a stand alone pressure calibration system. The unit may also be returned to

the factory for calibration. Call Anderson Technical Services directly for further

information.

The model LD/LA Level Transmitter utilizes an integral stainless steel atmospheric vent. The

system vent must be maintained to allow for proper operation of the unit.

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Be sure the atmospheric vent area is not obstructed. These ports must be open

and free from debris. DO NOT use sharp objects to free foriegn material from this

area. Flush with warm-low pressure water.