Alpha/Delta (Kinetic Operator) Installation and Maintenance Manual
Revision 1 - MAY 2023
165
VEHICLE DETECTOR AND LOOP FAULT DIAGNOSTICS
Table 14. Setting Loop Presence
Sub-menu Item Display
Example Site Scenario
PR 0
(LONG)
With sensitivity set to A (AUTO) and a large sedan stationary on
loop, LONG presence may hold call for many hours before vehicle’s
presence is tuned out. Then, stationary vehicle is ignored and
unaffected portion of loop becomes operational. In contrast, with
sensitivity set to M (MOTORCYCLE), default threshold only lasts
about 1 hour before presence of motorcycle on loop is tuned out.
PR 1
(INFINITE)
On a site where standing or parked vehicular traffic (on large area
loops) is on a daily or consistent basis, INFINITE presence setting
is a viable option. When loop may have vehicles parked on it for
more than several hours and it must hold the call, set presence
to INFINITE.
HY5B has ability to continue counting
vehicles passing over loop even
though a stationary vehicle may
be on a portion of loop. Controller
and HY5B detector also exchange
pertinent information, so if a power
failure were to occur, controller can
determine if a vehicle is on loop
when power returns.
Frequency:
Knowing the exact frequency of a loop can be useful as a diagnostic tool, and verifying the stability of the
loop frequency is valuable information. To view the actual loop frequency of a specific vehicle detector,
go to the setting for that detector in the Installer Menu, switch the selection from 0 to 1, and press the
Select button. The display will show the loop frequency. The frequency is usually between 20,000 to
80,000 Hertz.
Changing the Loop Frequency:
HY5B detectors can never crosstalk. If for any reason, you want to manually change the loop frequency,
change the Installer Menu option for the desired loop from 0 to 3, and then press the Select button. Each
detector has a choice of four frequencies. Press the Select button when the desired frequency setting is
found, and the controller will perform a reset and tune to the new frequency setting.
Call Strength Level:
Knowing the call strength of a detector is valuable because it provides information about how well the
loop is actually “seeing” a specific vehicle. For example, it may be useful to check to see if the loop is easily
detecting the middle of a high bed semi-truck. The strength of a detector call can be displayed in real time,
on a scale of 0 to 7. As indicated in the table below, when the Installer Menu setting for a given detector is
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