5300.9677.72 - 1.9 - EN-4
Chapter 1 Safety
Note Instances occurring in practice continue to show that a short circuit triggered by a metal
hand tool causes severe burns. A short circuit causes an arc and the rated output of the
power supply sets up continuous welding.
Exercise the same amount of caution for measurements on low impedance supplies;
e.g. for repair purposes or to optimize the power consumption of the transmitter, as you
would when performing measurements on supply voltages constituting a shock hazard.
If necessary the appropriate protective equipment will have to be installed.
Before opening a transmitter or removing a cover, switch off the energizing voltage and
wait a further 5 minutes until all capacitors are properly discharged.
Do not discharge capacitors by short-circuiting them.
4.3 Hazards from RF Radiation
4.3.1 Obligation to Instruct Personnel
The operator must train all personnel in the operation of this transmitter or equipment in
accordance with EN 60215 and/or IEC 215. It is essential that these regular instruction
sessions emphasize the dangers related to high frequency that exist on the respective
transmitter or equipment. Operators are only authorized to adjust and operate the equip-
ment after successful completion of the respective instruction sessions and after the re-
sults have been placed on record.
High-energy RF circuits inside the transmitter or equipment are routed via conventional re-
movable RF connectors (e.g. type N). Depending on the output power of the transmitter,
the output ports of the equipment are equipped with screw-type or plug-in RF lines or ducts.
Where an RF cable or module carries high power, the connection point or the entire module
is tagged with the general danger warning label (yellow triangle with a black exclamation
mark).
4.3.2 Antenna Connector
If the output power is low, the antenna connector is provided with an appropriately low-pow-
er connector, e.g. "N". It is possible for the antenna connector to be confused with other
signal I/Os that use connectors of the same type.
For the safety of the user it is therefore important not to open the antenna connector while
the transmitter is operating. There is a very real danger of injury from a RF electric arc.
4.3.3 RF Shielding
Life threatening field strengths exist in the interior of cables and modules that conduct RF.
RF cables must therefore never be disconnected when the equipment is operational and
modules must never be operated when they have been opened.
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