Hydrologic

FLOW

Acquisition and storing measurements

DATA ACQUISITION UNIT
Alphée 2012


  • A completely configureable data acquisition unit
  • 12 possible inputs :
    • 4 digital pulse inputs for counting and/or position encoding.
    • 4 unbalanced (unipolar) analogue inputs 0-10 V or 4-20 mA with 14 bits resolution.
      Only one of the analogue inputs can accept a PT 100.

    4 remote monitoring inputs :

    • 4 On/Off inputs for monitoring contact status.
  • 4 outputs available :
    2 On/Off relay outputs for alarms or commands.
    2 RS 232 serial digital interfaces for the in-house service console or for a modem.
Functions
 
  • The 4 transducers for the analogue inputs can be powered from the unit with choice of supply time per channel.
    •
  • Acquisition time period and storing time period for different and independent measurements can be varied between 5 s and 24 h.
    •
  • Calculation of moving hourly average and of cumulative and partial totals for each measurement.
    •
  • Monitoring of data in relation to thresholds.
    •
  • Control of sampling unit.
    •
  • Control of internal operational status (auto diagnostic).
    •
  • RAM Data Storage size 128 Kbytes to 640 Kbytes.
    •
  • Dynamic memory allocation by block and by measurement data.
    •
  • Operation of alarms possible via a control relay ;
    alarm signal from PC alarm receiver and/or a pager.
  • Capability of 4 virtual measurements, hence 12 values from 8 data inputs.
    Pressure

    Level (real measurement)

    Flow rate (virtual)
    •
  • EMC (Electromagnetic compatibility) performance : Level 3
  • Low consumption
  • The unit is housed in a metal box for mounting on a DIN rail or in a plastic enclosure for wall mounting.
    • Technical
    specifications
     
    ANALOGUE INPUTS
    Voltage
    		 0 - 10 V
    Current
    		 4 - 20 mA ou 0 - 20 mA
    Resistance board
    		 PT 100
    Resolution
    		 14 bits
    Accuracy
    		 10 -3 Full scale at 20°C
    Conversion time
    		 approximately 60 ms
    Filtering
    		 20 ms per channel
    Transducer power supply
    		 12 VDC (10 mA/channel)
    Can be set (1 to 5 s)
    NUMERICAL PULSE INPUTS
    Floating contact inputs
    		 (i.e. with no potential)
    or at 0 to 5 VDC
    Filtering
    		 5 ms per channel
    Count frequency
    		 < 100 pulse per second
    Encoder resolution
    		 < 100 points/turn
    Encoder speed
    		 < 100 points per second
    Transducer power supply
    		 5 VDC (20 mA)
    ON/OFF INPUTS
    Inputs for floating contacts
    		 (i.e. with no potential)
    Filtering
    		 20 ms per channel
    ON/OFF OUTPUTS
    Relay Contact
    		 One Make contact (floating)
    Voltage
    		 < 240 VAC
    Current
    		 < 8 A
    COMMUNICATION INTERFACE
    Digital interface
    		 RS 232 C
    Format
    		 7 bits, 1 stop, even parity
    8 bits, 1 stop, without parity can be set
    Transmission speeds
    		 1200, 2400, 4800 and 9600
    Bauds can be set
    POWER SUPPLY
    Nominal voltage
    		 12 VDC
    Variable over a rang
    		 between 9 and 36 VDC
    Current drain
    		 < 100 mA in operation
    < 3 mA in standby
    DATA STORAGE
    RAM
    		  
    Module sizes
    		 128, 256, 640 Kbytes
    RUNNING PARAMETERS
    Sampling period
    		 5 s to 24 h
    Recording period
    		 5 s to 24 h
    Filtering
    		 Linear average
    Thresholds high or low
    		 at between 0 and 100%
    of data range
    Transducer supply
    		 1 to 5 s
    CONVERSION CURVES
    Linear interpolation
    		 y = Ax + B
    Non-linear interpolation
    		 y = Ax3/2 + Bx5/2
    Temperature compensation
    		 z = (A + By)x
    Linear combinaison
    		 z = Ax + By
    Experimental curves
    		 20 points
    HOUSING PAINTED METAL BOX
    Dimensions
    		 200 x 122 x 68 mm
    Protection index
    		 IP 40
    HOUSING PLASTIC ENCLOSURE
    Dimensions
    		 280 x 280 x 120 mm
    Protection index
    		 IP 65
    RUNNING RANGE
    Temperature from
    		 -20°C to +55°C
    There is a version for the range -40°C to +60°C
    Relative humidity
    		 < 80% without condensation
    STANDARDS/DIRECTIVES
    CE Mark
    		  
    EMC C46-023 or 801-4
    		 Level 3 protection tests
    CAN BE USED WITH SERIES 3000
    Transmitters Alphée 3100/3200 and inductive probes Alphée 3120/3220
    Bubbler gauge Alphée 3010/3020

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