20
BG 5171 BEN / B (2017-02) PBR 260
• Pin approx. ø1.3 × 50 mm (e.g. a bent open paper clip)
The push button used for the adjustment at atmospheric pressure is also used for
the zero point adjustment (→ above).
Operate gauge for approx. 10 minutes at a pressure of ≤1×10
-4
hPa.
Insert the pin through the opening marked <ATM> and push the button
inside for at least 2 s.
The adjustment is done automatically and ends after 2 minutes.
Small deposits on the electrode system can be removed by baking the anode
(Degas → 18). In the case of severe contamination the baffle can be exchanged
(→ 22). The sensor cannot be cleaned and must be replaced if it is severely
contaminated (→ 23).
For cleaning the outside, a moist cloth is usually sufficient. Do not use any
aggressive or abrasive cleaning agents.
Caution
Make sure that no liquids get inside the product. Allow the gauge to
dry thoroughly before putting it into operation again.
In severely contaminating processes and to optically protect the measurement
electrodes against light and fast particles, replacement of the built-in grid by the
optional baffle is recommended (→ 26).
Caution
Caution: dirt sensitive area
Dirt prolongs the pumpdown process.
Always wear clean, lint-free gloves and use clean tools when working
in this area.
• Baffle (→ 26)
• Tweezers
• Stick (e.g. pencil)
Required tools
Procedure
5.3 Cleaning the Gauge
5.4 Installing the Baffle
Tools / material required
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