Ultra Start 15xx Bedienungsanleitung PDF herunterladen (Seite 87)

10-5

Start Study

Once you have entered the

distance the display shows the

type of study and the current

time so that you can start the

study at a speciﬁc time.

The TDC Ultra is now waiting for you to press the green "A" key to

start the study. Wait until a vehicle crosses the start line, then press the

A key.

When the vehicle crosses the end line in front of you, press the key

(#1-13) that corresponds to the vehicle classiﬁcation based on the clas-

siﬁcation scheme you are using. The TDC Ultra calculates the speed

and displays it on the screen. Wait for the next vehicle to cross the start

line and press the green "A" key. Wait for this vehicle to cross the end

line and press the classiﬁcation key.

The display shows the number

of cars that you have measured,

the speed of the last vehicle

you measured and the class of

that vehicle.

Continue measuring the speed of the vehicles until you are ready to quit.

You can collect data for a ﬁxed period of time, during the peak hour for

example, or until you have enough data points for your requirements.

In general, you want to measure at least 100 vehicles to guarantee a

good statistical sample.

Ending the Study

When you are done collecting data, turn the TDC Ultra off.

Remember, the only way to stop a study is to turn the power off.

Spot Speed

# Speed Class

000 --- ---

16:24:15

Spot Speed

# Speed Class

009 45 02

16:24:15

Chapter 10 — Spot Speed Studies

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Ultra Start 15xx Bedienungsanleitung Seite 87