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NSG 5500 Automotive transient immunity generator
2.8 Installation / set-up MT 5511
Check the instrument for any mechanical damage. Report any damage found to the carrier immediately.
Ensure that the power is turned off on the NSG 5500 mainframe and that the battery input is disconnected.
Insert the cassette in the most left slot and push in fully. Screw in the four retaining screws fully. The battery
switch is required, ensure that this module is present and inserted fully in the rear of the NSG 5500 main-
frame.
It is vitally important that the unit mains power is connected to protective earth. Turn on the mains input power
on the NSG 5500 mainframe. After approximately a two second delay the power LED (red) on the MT 5511
generator should light. After a further two-second initialisation period, the unit is ready for operation.
The software communications will not start until this initialization time is complete.
The scope test set-up shown in picture 2-11 should be connected and the output pulses should be quickly
checked to ensure that they are of the correct form and shape. As pulses are generated the “Fire” LED should
light briefly.
The MT 5511 should be then verified in accordance with Annex C of ISO 7637-2:2011 or similar section of the
applicable standard.
When correct operation has been verified, the DUT can be connected to the “OUTPUT” terminals at the front
of the unit, and the required tests can be carried out.
2.8.1 Test set-up
The following set-up may be used to check the integrity of the output pulses. The scope probe should be in
conformance with the specifications outlined in ISO 7637-2.
CAUTION!
it is critical to compensate the probe in advance. Because of the exponential
shape of the transients, an uncompensated probe will cause errors on rise time
and voltage measurement, and an incorrect pulse shape.
Ground plane
High impedance
Oscilloscope probe
NSG 5500
output
(in module
FT 5531)
Picture 2–11: Test set-up with the MT 5511 and scope.