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Instruction Manual
When making a CF flange connection, it may be advantageous to temporarily remove the electronics unit as
shown below.
WARNING! Helium may cause electric arcing with detrimental effects on the electronics of the product.
Before performing any leak tests disconnect power and remove the electronics unit.
3.2 Electrical Installation
3.2.1
Grounding
WARNING! Be sure the vacuum gauge and the rest of your vacuum system are properly grounded for
safety as well as intended operation of the equipment. When using KF flanges, metal clamps must be used to
ensure proper grounding.
WARNING! The gauge may only be connected to power supplies, 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:
• 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 ≤16 V (overvoltage protection).
InstruTech
Hexagon socket AF 2
Protective lid
CCM502 Hornet
Page 11
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