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Model 801 Flat Flow Meter

The Model 801 Electromagnetic Flow Meters measure the speed of water in Open Channel environments with exceptional accuracy.

The Model 801 Electromagnetic Flow Meters measure the speed of water in Open Channel environments with exceptional accuracy.

The small sampling volume of the flat sensor makes it suitable for shallow flows, or measurements in confined spaces.

Support

Model 801 Flat Datasheet
Model 801 Flat Datasheet - French
Model 801 Flat Operating Manual
CDU Express Operating Manual

Software

CDU Express
C3

Technical Specifications

Model 801 - Flat Type

Range:
-5 m/s to +5 m/s
Accuracy:
±0.5% of reading plus 5 mm/s
Zero Drift:
<5 mm/s
Sensing Volume:
Cylinder of approx. Ø20 mm x 10 mm high
Minimum Depth:
5 cm

Data Acquisition

The Model 801 Flow Meter is supplied with a dedicated Control Display Unit that both drives the sensor and provides data display of the measured water velocity. Data is updated at 1 Hz, and may be averaged over any number of seconds from 1 to 600. The display will show real-time speed data at a resolution of 1mm/s, as well as the result of the data average, and a Standard Deviation figure to give added data confidence. A solid state memory records all results (up to 999 averaged readings), and the data may be downloaded to PC using
the RS232 interface lead supplied.

Calibration

The Model 801 is calibrated at Valeport’s own premises up to speeds of 1 m/s. Higher speed measurements are based on linear extrapolation. Specific high speed calibrations can be arranged at a third party facility on request.

Control Display Unit

Size:
244 mm x 163 mm x 94 mm, 2 kg
Environmental:
Sealed to IP67
Power:
8x alkaline C cells, up to 37 hrs operation
Operating Temp:
-5°C to +50°C (display unit)
-5°C to + 40°C (sensor)

Configuration

Available for use as hand held “Wading Sets” only, with the operator standing in the channel, holding the instrument in position. The system is supplied with 1.5m wading rod (3x 0.5m sections), graduated in cm, and a 3m cable from instrument to display unit.
Alternatively, a “top-setting” wading rod system is available, which allows the vertical position of the instrument to be set without removing the wading rods from the water.

Software

System is supplied with CDU Express Windows-based PC software, for data extraction from the display unit. CDU Express is licence free.

Shipping

Standard:
62 x 42 x 34cm, 9kg (wading set)

Ordering

0801002
Single Axis - Flat Sensor with Control Display Unit, interface
cable and operating manual in an ABS transit case
The above system is supplied with:
· 2, 5 or 12m cable (different lengths on request)
· Wading rod set
3x 0.5m graduated rods, base and direction knob, in a canvas carrying bag

Options

0801003
Wading Rod Set supplied with:
· 3x 0.5m graduated rods, base and direction knob, in a
canvas carrying bag
0001050
Top Setting Wading Rod Set for use with standard wading
rod set consisting of:
· 3x 0.5m graduated rods and necessary mounting
brackets, in a canvas carrying bag
0801011
Large transit case for instrument and wading rods
0300EA3
External DC power option (includes DC power input lead)

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