ST650EX / ST650-CO
2
/ ST350EX
v3.16
14
2.6 RFI (EMI)/EMC protection
The sensing head and signal cable should be protected against external noise sources. Avoid
running connection cables close to interfering sources such as high power cables, inverters,
radio transmission lines, computer communication lines or cables carrying pulses of high
current.
Use the following installation method:
Use the ground connection of the gas detection system as star point grounded to earth. Mount
the ST350EX/ST650EX on a non-conductive structure or base. Use an isolator when mounting
on a conductive surface (like a steel H-profile, aluminium panel or swallow plate) to avoid
connection to local electrical ground.
Connect the shield of the connection cable to the cable gland of the sensing head. Ensure proper
connection by clamping the shield in the centre of the conical bushing of the cable gland. The
other side of the screened cable should be connected with the system ground of the gas
detection control system as described in chapter 2.2 - Cable requirements and Cable installation.
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