GTT Canoga C924 Series, Installation Manual

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Canoga™ Vehicle Detectors
Canoga™ C924X Series Installation Manual
Vehicle Detector Setup & Configuration– 27
5. If your vehicle detector is connected to a loop, click the Default radio button for each channel
connected to a loop.
6. For every vehicle detector channel connected to a Microloop, click on the
Microloop radio
button.
For vehicle detector channels set to Microloop, you
must set the Threshold Multiplier, Slope
Timer, and Slope Divisor. You may make an initial setting for the Threshold Multiplier, Slope
Timer, and Slope Divisor by accepting the values given by the Suggest button.
Set channel
Sensitivity prior to clicking on the Suggest button. The suggest values are tailored for
channels connected to single-probe Microloop sensors which have a typical magnitude response
to automobile presence, e.g. 400 to 600 nanohenries. As a general rule, the Threshold
Multiplier must be doubled when the channel is attached to a dual-probe or triple-probe
Microloops. The settings for Threshold Multiplier and Slope Divisor are dependent on the
Channel sensitivity setting. Thus this step must be done every time the channel sensitivity is
changed.
If the sensor type is a Microloop, press
Suggest and accept the settings.
Then set Bridge Time to what you feel is the “typical minimum” time gap (time from when
detection drops on the leading vehicle to when detection starts for the trailing vehicle)
between vehicles.
7. Complete these settings for each channel. Wait to click on Apply until after all initial settings
changes have been selected.
NOTE: A channel configured for optimal performance for an inductive loop will generally
not perform as desired when connected to a Microloop. However, if the procedures for