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.
|Current||Valeport EM||0 – 5m/s||+/-1% reading||0.001m/s|
|Direction||Fluxgate||0 – 360°||+/-<1°||0.001°|
|Pressure||Piezo-Resistiv e||Up to 500Bar||+/-0.01%||0.001%|
|Temperature||PRT||-5 – +35°C||+/-0.005°C||0.002°C|
|Conductiv ity||Inductive Cell||0 – 80mS/cm||+/-0.01mS/cm||0.002mS/cm|
|Turbidity||Seapoint STM||0 – 2000FTU||+/-2%||0.001%|
|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|
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 :
|RS232||Up to 200m cable, direct to serial port via USB adapter|
|RS485||Up to 1000m cable, addressable half duplex comms|
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|
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).|
|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|
|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
System is supplied with DataLog Express Windows based PC software, for instrument setup, data extraction and display.
DataLog Express is license free.
|0808007||MIDAS ECM Current Meter (Titanium)|
|0808008||MIDAS 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.
|04000565||Pressure sensor (specify range)|
|0400012||PRT Temperature sensor|
|0400011||Conductiv ity sensor|
|0400002||16 Mbyte memory upgrade (max 64 Mbyte)|
|0400EA5||FSK modem adapter|
|TB0400FSK||Probe 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