INFICON Edge CDG045D2 1 … 1000Torr / mbar - Manual (Page 20)

20 tina86e1 (2013-11)
3.2 Power Connection
Make sure the vacuum connection is properly made
( →  16).
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
6)
.
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 cable shield to ground at one side via the
connector case. Make sure the connector case has
direct contact to the cable's shield on its whole cir-
cumference.
Do not connect the other side of the
shield.
• 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 ≤18 V (overvoltage protection).
6)
INFICON controllers fulfill this requirement.