AVE VCR 322 PLUS Bedienerhandbuch PDF herunterladen (Seite 17)

tqna49e1 (2010-05) 17

3.2 Power Connection

Make sure the vacuum connection is properly made

(→  14).

DANGER

The gauge may only be connected to power sup-

plies, instruments or control devices that conform

to the requirements of a grounded protective extra-

low voltage (SELV) and limited power source

(LPS), Class 2. The connection to the gauge has to

be fused

Ground loops, differences of potential, or EMC problems

may affect the measurement signal. For optimum signal

quality, please do observe the following notes:

• Connect the cable shield to ground on one side via

the chassis ground. Do not connect the other side of

the shield.

• Connect the supply common with protective ground

directly at the power supply.

• Use differential measurement input (signal common

and supply common conducted separately).

• Potential difference between supply common and

housing ≤18 V (overvoltage protection).

VARIAN controllers fulfill this requirement.

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AVE VCR 322 PLUS Bedienerhandbuch Seite 17