Changing The Hydraulic Oil; Recalibration - WIKA CPB 3000 Betriebsanleitung

Pressure Balance
CPB 3000

5.3 Changing the Hydraulic Oil

The hydraulic oil should be changed whenever visible contamination is present.
Removing hydraulic oil
Remove the piston/cylinder system and the test specimen from the pressure connections
Open the shut-off valve for the reservoir, by unscrewing it completely.
Take the transparent lid off.
Draw the liquid out of the reservoir e.g. with a suitable syringe.
In addition, any small residual quantities of oil can be drawn off at the pressure connections, by
slowly turning the spindle pump, with the shut-off valve closed.
Minute amounts of oil residue may remain in the piping
In case of severe contamination of the hydraulic oil, the complete cleaning of all
media-contacted individual components of the basement in a dismantled state may be
advisable. This procedure may be performed by the manufacturer only.
Waste oil must be disposed of according to legal requirements.
To refill and vent the system follow the instructions already given in chapter

5.4 Recalibration

The recommended interval between recalibrations is 5 years.
This is the recommendation of the German Calibration Service (DKD)
This interval assumes the system and weights are handled carefully.
If the system is in rough usage, we recommend shortening the interval to about three years.
The pressure balance should be immediately maintained and recalibrated, if:
the operating characteristics deteriorate (duration of free rotation, sink rate, sensitivity)
the weight pieces are damaged or corroded
For recalibration or if you have questions about the optimal recalibration cycle, the DKD lab would be
happy to assist you:
WIKA Alexander Wiegand SE & Co. KG
DKD-Kalibrierlaboratorium
Alexander-Wiegand-Strasse
63911 Klingenberg / Germany
Phone: (+49) 93 72 / 132 – 473
Fax: (+49) 93 72 / 132 - 8767
E-Mail: calibration@wika.de
WIKA Operating Instructions Pressure Balance Version 1.1
3.1.2 to 3.1.5.
GB
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