Description
FIELDS OF APPLICATION
The RQ-30L is mainly applied where existing measuring sites (e.g. gauging sites) should be upgraded in terms of quality without the need for big investments. While the water level can be measured as before, the radar sensor improves the accuracy by additionally determining the surface flow velocity. Therefore the RQ-30L is a very effective extension to all sites where the water level should (or must) be measured by a separate instrument other than the RQ-30.
MEASURING PRINCIPLE
The water level (water gauge) is determined by any measurement device other than the RQ-30L and provided the same as an analog data input for the discharge calculation.
TECHNICAL DETAILS
GENERAL
- Dimensions 241 mm x 246 mm x 154 mm
- Total weight 2.7 kg
- Protection class IP 67
- Power supply 6 … 30 V
- Power consumption at 12V standby approx. 1.5 mA; active operation approx. 140 mA
- operating temperature – 35 … 60°C
- Miscellaneous over-voltage protection, reverse power protection, lightning protection
SURFACE VELOCITY MEASUREMENT
- Measuring range 0.08 … 16 m/s (depending on flow conditions)
- Accuracy +/- 0.01 m/s; +/- 1 % FS
- Resolution 1 mm/s
- Direction recognition +/-
- Measurement duration 5 … 240 sec.
- Measurement interval 8 sec. … 5h
- Measuring frequency 24 GHz (K-Band)
- Radar opening angle 12°
- Distance to water surface 0.50 … 35 m
- The necessary minimum swell is 3 mm
AUTOMATICAL VERTICAL ANGLE COMPENSATION
- Accuracy +/- 1°
- Resolution +/- 0.1°
INTERFACE
- Interface 1 x SDI-12; 1 x RS 485 or Modbus; transfer rate: 1.2 to 115.2 kBd; protocol: various ASCII-protocols; output: discharge rate, flow velocity, water level, quality parameters
- Input (water level values) electrical signal: 4 … 20 mA or 0 … 2.5 V
- Output 3x analog outputs, 4 … 20 mA; for water level, flow velocity, and discharge rate
