Operation Manual

301UM0030_01 PD130 Enhanced Vehicle Detector User Manual Page: 10 of 29
3.2.2 Sensitivity
The sensitivity of the detector allows the detector to be selective as to the change of inductance
necessary to produce a detect. There are four sensitivity selections:
SW4 SW3
Off Off High
On Off Medium-High
Off On Medium-Low
On On Low
3.2.3 Automatic Sensitivity Boost
Automatic sensitivity boost is a mode which alters the un-detect level of the detector. This mode is
selected by Switch No. 5 on the front of the enclosure:
SW5
Off Disabled
On Enabled
Automatic sensitivity boost causes the sensitivity level to be boosted to a maximum on detection of a
vehicle, irrespective of current sensitivity level and maintained at this level during the entire presence
of the vehicle over the loop. When the vehicle leaves the loop and the detection is lost, the sensitivity
level reverts to the pre-selected level.
3.2.4 Filter Mode
The filter mode is selected with the mode Switch No. 6 shown below. The filter produces a delay turn-
on time of two seconds when a vehicle occupies the loop. This is to enable small, unwanted objects to
pass over the loop without being detected. The filter option may be used on any sensitivity setting.
SW6
Off Disabled
On Enabled
3.2.5 Pulse Relay
The pulse relay may be made to operate on detect (entry) or on undetect (exit) of a vehicle. This option
is selected with Switch No. 7:
SW7
Off Pulse on Detect
On Pulse on Undetect
3.2.6 Presence Time
The presence time may be set to permanent presence or to limited presence. In permanent presence
mode the detector will continuously compensate for all environmental changes whilst there is a vehicle
present over the loop. The presence mode is set with Switch No. 8:
SW8
Off Limited Presence
On Permanent Presence