28 tina83e1-d (2018-12)
3.2 Power Connection
Make sure the vacuum connection is properly made
(→ 24).
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 (PELV) and limited power source
(LPS), Class 2. The connection to the gauge has to
be fused.
5)
Ground loops, differences of potential, or EMC problems
may affect the measurement signal. For optimum signal
quality, please do observe the following notes:
• Use an overall metal braided shielded cable. The
connector must have a metal case.
• Connect the supply common with protective ground
directly at the power.
• Use differential measurement input (signal common
and supply common conducted separately).
• Potential difference between supply common and
housing ≤6 V (overvoltage protection).
5)
INFICON controllers fulfill these requirements.
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