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Home Pneumatic system MIDAS ECM Self Recording Electromagnetic Current Meter

MIDAS ECM Self Recording Electromagnetic Current Meter

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MIDAS ECM – Electromagnetic Current Meter

The MIDAS ECM is a highly versatile point current meter, designed with durability and ease of deployment in mind.

Valeport’s latest electronics architecture allows multiple additional sensors, and a variety of communications options, making it one of the few multiparameter current meters that allows real time operations over several thousand metres of cable, as well autonomous deployments. A choice of titanium or acetal housing gives depth rating up to 5000m.

MIDAS ECM Self Recording Electromagnetic Current Meter
MIDAS ECM Self Recording Electromagnetic Current Meter

Sensors

SensorTypeRangeAccuracyResolution
CurrentValeport EM0 – 5m/s+/-1% reading0.001m/s
DirectionFluxgate0 – 360°+/-<1°0.001°
PressurePiezo-Resistiv eUp to 500Bar+/-0.01%0.001%
TemperaturePRT-5 – +35°C+/-0.005°C0.002°C
Conductiv ityInductive Cell0 – 80mS/cm+/-0.01mS/cm0.002mS/cm
TurbiditySeapoint STM0 – 2000FTU+/-2%0.001%

 

Data Acquisition
Continuous :Regular output from all sensors at 1, 2, 4 or 8Hz.
Burst :Regular sampling pattern, where instrument takes a number of readings, then sleeps for a defined time.
Conditional :Instrument sleeps until a selected parameter reaches a set v alue.
Delay :Instrument sleeps until predefined start time

Communications

The instrument will operate autonomously, with setup and data extraction performed by direct communications with PC before and after deployment. It also operates in real time, with a choice of communication protocols for a v ariety of cable lengths, all fitted as standard and selected by pin choice on the output connector :

Standard
RS232Up to 200m cable, direct to serial port via USB adapter
RS485Up to 1000m cable, addressable half duplex comms
Optional FSK
2 wire power & comms up to 6000m cable (cable dependent)
Baud Rate :2400 – 115200 (FSK fixed at 19200, USB 460800)
Protocol :8 data bits, 1 stop bit, No parity, No flow control

Memory

The MIDAS ECM is fitted with 16Mb solid-state non-v olatile FLASH memory. Total capacity depends on sampling mode; continuous & burst modes hav e a single time stamp at the start of the file, trip mode (profiling) stores a time stamp with each reading. Asingle line of current data uses 10bytes, with each additional parameter taking 2bytes and
a time stamp uses 7 bytes. The examples are for an instrument measuring speed, direction and CTD.

Continuous :>520,000 data points
Profile :>360,000 data points (>15 profiles to 5000m).

 

Electrical
Internal :8x D cells, 1.5V alkaline or 3.6V lithium
External :9 – 30V DC
Power :1.7W (sampling), <1mW (sleeping)
Battery Life :>100 hours operation (alkaline)
>250 hours operation (lithium)
Connector :SubConn MCBH10F

 

Physical
Materials :Titanium or Acetal housing, polyurethane
sensor components, stainless steel (316) cage
Depth Rating :5000m (titanium), 500m (acetal)
Instrument Size :150mmØ x 700mm long
Cage Size :210mm Ø x 732mm long
Weight : (in cage)20kg – Titanium
12kg – Acetal
Shipping :130 x 37 x 32cm, 38kg – Titanium
130 x 37 x 32cm, 34kg – Acetal

Software

System is supplied with DataLog Express Windows based PC software, for instrument setup, data extraction and display.
DataLog Express is license free.

Ordering
0808007MIDAS ECM Current Meter (Titanium)
0808008MIDAS ECM Current Meter (Acetal)

measuring speed and direction the system is supplied with :

  • Deployment cage.
  • SubConn switch plug.
  • 3m communications lead.
  • USB adapter.
  • DataLog x2 software, Manual, tool kit and transit case.
Options
04000565Pressure sensor (specify range)
0400012PRT Temperature sensor
0400011Conductiv ity sensor
0400021Turbidity sensor
040000216 Mbyte memory upgrade (max 64 Mbyte)
0400EA5FSK modem adapter
TB0400FSKProbe board set required for FSK operation

Read more : miniIPS – Intelligent Pressure Sensor; CTD and Multiparameter Instruments; Current Meters And Open Channel Meters; Model 803 ROV Electromagnetic Current Meter; Model 001 & 002 Open Channel Flow Meters

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