Specifications

Siemens Mobility, Traffic Solutions

Sopers Lane, Poole, Dorset

BH17 7ER

Version 10 Page 48 of 120 Status Issued

Last Editor harry.smyth Date 03 November 2014

Document

Name

GENERAL HANDBOOK FOR HEIMDALL

DETECTORS

Doc. No.

667/HB/31900/000

5.3.4.4 Detector Alignment - Default

The detector uses a movement detection algorithm. Thus, the detector is aimed towards

oncoming traffic and towards the centre of the centre of the carriageway, at a position

approximately 25 metres from the mounting pole position, as shown in Figure 16 below.

Figure 16 – Variable Speed Threshold VA Detector Installation – Plan View

5.3.4.5 Detector Range - Default

The detector uses a movement detection algorithm. The range is typically set by the

appropriate angle and installation height. If the user requires a significant reduction in the

detection range (sensitivity), the detector configuration may be adjusted using DIP switch

6 (reference Table 5-5 below). Alternatively the terminal command RGE could be used

(reference section 7.7.4). The default setting is set for maximum sensitivity.

5.3.4.6 Detector Fault Monitor (DFM)

The detector has a fault monitor function. In the default mode, the detector will generate a

fault output (equivalent to a permanent detect) if the detector has not registered an

activation for a period of twenty hours.

This duration can be adjusted to a user defined value by setting DIP Switch 7 to ‘1’ (On)

and then using the terminal command DFM (reference section 7.7.4).

5.3.4.7 Output Hold Time

The detector continues to hold the detector output for a default period of 1000mS after

actual object detection has ceased. This can be adjusted to an extended and user

defined period by setting DIP Switch 5 to ‘1’ (On) and using the terminal command DHT

(reference section 7.7.4).