EM TEST (Switzerland) GmbH
PFM 200N100.1
User’s Guide
Ver. 1.12
7 / 43
2.2.
Care During Testing
All tests using high voltage or EMC generators are immunity tests for electrical devices. The device under test
(DUTs) can react incorrectly which may lead to a dangerous situation. The user is responsible to take care to
avoid the risk to man and material.
One must carefully follow all relevant international guidelines and requirements for the protection of people. This
is especially important in unusual setups or where pulses may be coupled.
People at risk are prohibited from using the system; for example, people with pacemakers.
Long cables leading to the DUT can radiate and effect devices in the area, including devices that do not belong to
the test setup. It is the user’s responsibility to decide if and when the use of an area is acceptable for EMC
testing.
Tests with high voltage can lead to sparks. It is strictly forbidden to perform tests in areas where there exists a
risk of explosion.
2.2.1.
Switching Off
- The CDN has
no internal protection
.
Switching off of the DUT is accomplished with an electronic switch that contains a current measurement that
can be overloaded to 400 A when the DUT power is switched off.
CAUTION
In extreme cases, like when using an automotive battery into a short, can result in currents well
over 400 A. In these cases, the electronic switch can no longer switch off.
Therefore, additional protection, like an inline fuse, is recommended to ensure safety when using
an automotive battery.
The user must provide a breaker for the DUT. Special adapters with switching and breakers are available, but
must be specified by the user.
- To couple a disturbance on a data or signal line, the coupling method must first be carefully defined.
- If a data or signal line is not to have pulses coupled, the lines shall be removed entirely from the CDN!
2.2.2.
Danger to the Device Under Test (DUT)
The pulses can lead to an unexpected condition of the DUT that results in a dangerous situation.
Therefore, the following conditions should be carefully observed:
Stop the test when the DUT behaves abnormally.
Due to an internal defect, high voltage components may make contact to the DUT housing.
Cables and connectors can be overloaded by overvoltage.
Internal destruction of components can lead to fire or explosion.
Accidental operation of the DUT can cause dangerous situations.
DANGER Never approach a DUT during test!
2.2.3.
Input Capacitance
In order to achieve the necessary switching time, the PFM 200N100.1 contains capacitance at the battery input
PF1. Ripple tests may not be performed when the PFM 200N100.1 is connected because the capacitive
reactance of this buffer capacitor will cause the VDS 200 to go into current limit. The VDS 200Q series is
prepared with a jumper to easily isolate the PFM 200N100.1 when it is not needed.
