INFICON BCG450 ATM to Ultra-High Vacuum Triple Gauge - Manual (Page 45)

tina40e1-b (2011-04)
45
6 Maintenance, Repair
DANGER
DANGER: contaminated parts
Contaminated parts can be detrimental to health and environment.
Before beginning to work, find out whether any parts are contami-
nated. Adhere to the relevant regulations and take the necessary
precautions when handling contaminated parts.
Small deposits on the electrode system can be removed by baking the anode
(Degas
→ 28). In the case of severe contamination, the baffle can be exchanged
easily ( → 16). The sensor itself cannot be cleaned and needs to be replaced in
case of severe contamination ( → 49).
A slightly damp cloth normally suffices for cleaning the outside of the unit. Do not
use any aggressive or scouring cleaning agents.
Make sure that no liquid can penetrate the product. Allow the product to
dry thoroughly before putting it into operation again.
Gauge failures due to contamination or wear and tear, as well as
expendable parts (e.g. filament), are not covered by the warranty.
The gauge is factory-calibrated. Through the use in different climatic conditions,
fitting positions, aging or contamination (
→ 28) and after exchanging the sensor
( → 49) a shifting of the characteristic curve can occur. However, readjustments
are automatically carried out during operation of the gauge.
The ambient atmospheric pressure of the gauge is measured by a separate sensor
built into the electronics unit of the gauge (outside the vacuum chamber).
This sensor can be calibrated against the Capacitance Diaphragm sensor in the
gauge. While the gauge is in a vented state, the gauge electronics compares the
output signals of the two sensors and carries out the necessary adjustments to the
atmospheric pressure sensor signal.
The following adjustment procedure can only be carried out via the
serial interfaces.
Vent vacuum system (or operate gauge in the deinstalled state)
6.1 Maintenance
6.1.1 Cleaning the Gauge
6.2 Adjusting the Gauge
6.3 Adjusting the
Atmosphere Sensor
Adjustment via RS232 interface
(BCG450)