Wika CPB3800 Manual de usuario descargar pdf (Pagina 38)

WIKA operating instructions model CPB3800

14062232.03 12/2013 GB/D

7. Maintenance, cleaning and recalibration

This covers stripping the unit to enable simple repairs and the tting of recommended

spare parts to be carried out.

7.3 Cleaning

Cleaning the unit and checking the liquid levels.

Oil operation

Keep the system clean and free from spilt oil. Wipe out the oil cups under the gauge

stands as necessary. Do not use any cleansing solvents as they may damage the seals.

Ensure that the reservoir contains sucient liquid to carry out any calibrations required.

If necessary top up the reservoir with the same liquid that is already being used. Do not

mix various types or brands of liquid in the pressure balance.

If the oil in the system becomes dirty, use the spindle pump to ush through the clean oil

with a drain screwed in the gauge stand. (An angle connection is suitable). The spindle

pump should be turned fully clockwise before starting.

Wear safety goggles!

Protect eyes from ying particles and liquid splashes.

For information on returning the instrument see chapter 9.1 "Return".

7.4 Recalibration

UKAS, DKD/DAkkS certicate - Certicates:

We recommend that the instrument is regularly recalibrated by the manufacturer, with

time intervals of 5 years. The basic settings will be corrected if necessary.

7.4.1 Factory overhaul and re-certication of pressure balances maintenance of

accuracy.

The accuracy of a pressure balance depends primarily on the eective area of the

piston unit and on the weights applied to the piston. The eective area of the piston unit

can be aected by wear of the unit. This is generally caused by contamination of the oil

in the pressure balance by foreign matter from instruments being calibrated, by water, or

by chemicals from instruments, or by rust or corrosion caused by contaminants.

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Wika CPB3800 Manual de usuario Pagina 38