EM Test CWS500 D
User manual V 1.07 16 / 34
5. Starting Operation
5.1. Safety Aspects
Tests performed with RF-disturbances, induced by radio-frequency fields, are immunity tests on electronic
equipment. Therefore it is the responsibility of the user to avoid critical failures and risks to the environment and
the operators.
Long power supply lines to the EUT may radiate energy. It is the responsibility of the user to determine whether
it is allowed to conduct immunity tests in a given location.
The RF voltages on the center pin of the RF output connector can be hazardous. The RF output connector must
be connected to a load before AC power is applied to the CWS 500D. Do not touch the center pin of the RF
output connector or accessories which are connected to it. Switch the equipment to the “Test OFF” position
before disconnecting or connecting the load to the RF output connector.
During this test RF interference is generated at a power of 100W or more. Therefore, the test should be
performed in a shielded room to prevent interference with other equipment in the vicinity. Also see the
information included in the declaration of conformity for the CE mark.
For the test setup, national and international safety regulations must be observed.
Persons beings with pacemakers must not be allowed to perform such tests.
Special Information For Operating the CWS 500D :
1. The intake and outlet for the cooling system must not be covered. Free air circulation of is required for
proper function of the CWS 500D. Blockage of the cooling air system may result in damage to the RF
amplifier or intermittent shut down of the equipment.
2. All panels must be installed. They are important components of the cooling system. Never perform tests
with a partially or completely open generator.
3. Before a test or a calibration may be performed, the CWS 500D must be operating for at least 15 minutes
warm up time. After this time the CWS 500D output becomes stable
4. High voltage components will only be exposed when the 3 cover panels are removed (unscrewed). To
service the inside the generator, the power supply must be turned off and the power cord must be removed
before opening the equipment.
5. CDN’s are coupling/decoupling networks as specified in IEC 61000-4-6 . Due to this specification, higher
ground current exists as a result of increased value of the Y-capacitors. Therefore, the general use of fault
current protection relays is not possible. The use of isolating transformers for the power supply may be
required.
6. Some CDN’s are designed for higher and hazardous voltages. It is necessary to remove the power cord
from the input connection of the CDN’s before opening the housing.
7. Only trained and qualified service technicians are allowed to perform service and repair the instruments.
Please contact an EM TEST service center or your local sales partner for repairing or servicing the units.
8. The calibration of the test setup has to be done on the output of the CDN’s. To connect the 150-to-50Ω
matching resistor, special adapters are required (e.g. power supply connector to single pole plugs).
9. Make sure to read carefully and completely all the manuals.
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