VisGuard 2 In-situ
Visibility Monitor
The VisGuard measures the scattered light intensity of a sample drawn into the instrument. Filtered purge air is fed through the flow cell, thus enveloping the sample in a protective shroud of clean air. This effectively keeps the optics clean. Installations are either in the tunnel cavity/niches (in-situ) respectively using extractive sampling away from the cavity. An optional sample heater eliminates the influence of any mist effects.
Advantages
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Easy to service, high sensitivity, stability and accuracy
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Easy zero-point checking, even when visibility is poor
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A special sample flow concept entirely eliminates the danger of flow cell contamination
Technical data
- Nominal range
- 0 .. 100 PLA (Polystyrol-Latex-Aerosols)
0 .. 3'000 mE/m - Protection class
- IP66 (only with mounted protection caps)
- Enclosure
- Stainless steel 1.4435 / 1.4571
- Measuring principle
- 30° scattered light
- Operation voltage
- 24 VDC
- Weight
- 6.5 kg
- Power consumption
- 7 W
Option: heater 10 W - Dimensions
- approx. Ø 209 x 366 mm
- Resolution
- 0.001 mE/m
- Ambient temperature
- -30 °C .. +55 °C
- Ambient humidity
- 0 .. 100 % rel. Humidity
- Wavelength
- 880 nm
- Connection box SIPORT 2
- Power supply: 100 .. 240 VAC; 47 .. 63 Hz
- Power input: max. 25 W / 45 VA
- Protection: IP66
- Enclosure: Polyester, fibre glass reinforced
- Weight: 1.3 kg
- Dimensions: approx. 220 x 155 x 91 mm
- Modules for SIPORT 2
- Interface Module Profibus DP
- Interface Module Modbus RTU
- Interface Module PowerRel:
- 2 x 0/4 .. 20 mA, max. 500 Ω, galvanic separated
- 3 x Semiconductor relays max. 30 V, max. 0.12 A, Ron max. 25 Ω- Hand-held control unit
- SICON-C for SIPORT 2:
Graphics TFT with touch operation - Conformities
- ASTRA «Guideline – Ventilation in road tunnels (2008)»
RABT (2006)
RVS 09.02.22