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Please ensure, that both indicators are turned off whenever the engine reverses the
direction between two runs of the procedure. There are additional options, with
which the run-out and the pause between two passes of the measurement can be
adjusted. If an indicator is not turned off when the engine reverses the direction
then increase the run-out or the pause, respectively.
Measuring with Occupancy Sensors
Start Centre
Stop
Length
Diagram 61: Measurement with Occupancy Sensors
For the measurement with occupancy sensors three occupancy sensors are needed.
These sensors are associated with three contact indicators, called “Start”, “Centre” and
“End”. The length of the track section used for the measurement is determined by the
length of the occupancy section associated with “Centre”. The length of the other occupancy
sections does not matter.
To start the measurement put the engine on the track in a certain distance left of section
“Centre” heading to section “Centre”. The engine will be started in forward direction.
When it reaches the section “Centre” the measurement of the current speed step begins.
When the engine reaches the section “End”, then the engine is decelerated and stopped.
Now the engine reverses the direction and the measurement of the same speed step in
backward direction is performed, now using indicator “Centre” for the beginning of the
measurement and indicator “Start” for the termination. After reaching indicator “Start”
the engine is decelerated and stopped and the measurement is repeated for the next
speed step in both directions.
The whole procedure is repeated until the speed step that corresponds to the specified
maximum speed has been measured.
There must not be any “dead gap” between the occupancy sections. That means
the track sections must be located close together. Track section “Centre” must begin
where the other track sections end and vice versa.
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