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HY-CDP22 Tunnels Entrance Photometer
Publish User:admin Publish Date:2010-01-13 16:17:57
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HY-CDP22 Tunnels Entrance Photometer


Overview

The HY-CDP22 Photometer measures the level of luminance, or brightness, created by natural light at the tunnel entrance / exit to ensure that the visual perception of drivers will be maintained, both day and night, by avoiding sudden variations in lighting levels and potential “black hole effect” when entering and exiting a tunnel.

The HY-CDP22 Photometer uses a specially designed, highly light-sensitive photocell, filtered to provide a spectral response close to that of the average human eye, to react to changes in light levels within the tunnel environment. This reaction is virtually instantaneous. The light receptor measures the average luminance within an acceptance angle subtending 20 degree.

The HY-CDP22 Photometer is a self contained intelligent analyser and the measurements are converted into an output signal of 4-20 mA (directly proportional to the luminance measurement).

The HY-CDP22 Photometer also comes with alarm relay contacts and ModBus serial  communications protocol.

The HY-CDP22 Photometer has been designed to enable it to withstand extremes of weather conditions. The complete electronic system is contained within a water-proof, heated housing of powder coated steel with an IP66 protection rating.

The HY-CDP22 Photometer has an operating temperature range from -30‚ - +70‚C which ensures stable readings across all prevailing ambient temperature conditions.


Applications

  1. CIE Approved measurement technology
  2. Accurate measurement of tunnel entrance luminance
  3. Designed specifically for tunnels
  4. Rugged construction
  5. Simple installation/operation
  6. Isolated 4-20mA analogue outputs
  7. Alarm relay contacts
  8. ModBus serial comms


Specification:


No.

Parameter

Units

Min

Max

Comment

1

Detector

Silicon photo diode

2

Measuring Angle

20

20

3

Measurement Range

cd /m2

0

7,000

4

Accuracy

%

-3

+  3

Relative to reading

5

Voltage

VAC

85

264

50/60Hz

VDC

100

370

6

Power Consumption

W

15

TBC

7

Serial Outputs

ModBus RTU (RS485)

8

Analogue Outputs

mA

4.0

20.0

9

Relay Contacts

4

10

Ingress Protection

IP66

11

Operating Temperature

°C

-30

+70

12

Storage Temperature

°C

-30

+70

13

Operating Humidity

%

0

100

14

Materials

Powder coated aluminum casting

15

Dimensions

mm

370x189x167

16

Weight (each)

Kg

3.5

17

Mounting

Adjustable brackets available for wall or post / pole mounting (optional)

18

Warranty

Months

24





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