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MIDAS ECM

The MIDAS ECM is one of only a few multiparameter current meters that allow real-time operations over several thousand metres of cable, as well as autonomous deployment.

A highly versatile point current meter, it is designed with durability and ease of deployment in mind. Valeport’s latest electronics architecture allows multiple additional sensors, and a variety of communications options. A choice of titanium or acetal housing gives depth rating up to 5000m.


Support

MIDAS ECM Datasheet
MIDAS ECM Operating Manual
DataLog X2 Operating Manual

Software

DataLog X2
1.1.0.1315

Technical Specifications

Sensors

Current

Type
Valeport EM
Range
0 – 5m/s
Accuracy
+/-1%reading
Resolution
0.001m/s

Direction

Type
Fluxgate
Range
0 – 360°
Accuracy
+/-<1°
Resolution
0.001°

Pressure

Type
Piezo-Resistive
Range
Up to 500Bar
Accuracy
+/-0.01%
Resolution
0.001%

Temperature

Type
PRT
Range
-5 - +35°C
Accuracy
+/-0.005°C
Resolution
0.002°C

Conductivity

Type
Inductive Cell
Range
0 – 80mS/cm
Accuracy
+/-0.01mS/cm
Resolution
0.002mS/cm

Turbidity

Type
Seapoint STM
Range
0 – 2000FTU
Accuracy
+/-2%
Resolution
0.002%

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 value.
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 variety of cable lengths, all fitted as standard and selected by pin choice on the output connector:

Standard

RS232
Up to 200m cable, direct to serial port via USB adapter
RS485
Up 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-volatile FLASH memory. Total capacity depends on sampling mode; continuous & burst modes have a single time stamp at the start of the file, trip mode (profiling) stores a time stamp with each reading. A single 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)

Software

System is supplied with DataLog X2 Windows based PC software, for instrument setup, data extraction and display. DataLog X2 is licence free.

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

Ordering

0808007A
MIDAS ECM Current Meter (Titanium) -
is supplied with:
· Deployment cage
· SubConn switch plug
· 3m communications lead
· USB adapter
· DataLog x2 software
· Manual, tool kit and transit case

Options

0808007B
MIDAS ECM, titanium housed, standard
package with FSK communications option
0808007C-XX
MIDAS ECM, titanium housed, standard
package with Pressure option
0400011
Conductivity sensor
0808007D-XX
MIDAS ECM, titanium housed, standard
package with Pressure & FSK communications
options
0808007E-XX
MIDAS ECM, titanium housed, standard
package with CTD options
0808007F-XX
MIDAS ECM, titanium housed, standard
package with CTD & FSK communications
0808007G-XX
MIDAS ECM, titanium housed, standard
package with CTD & Turbidity options
0808007H-XX
MIDAS ECM, titanium housed, standard
package with CTD, Turbidity & FSK
communications options
Note
XX on code denotes pressure transducer range.
Select from 10, 20, 30, 50, 100, 200, 300, 400, or
600bar (for 5000m operational use)

Cables

0400EA50CD
50m Signal cable on hand reel. Fitted with
Subconn 10 way connectors.
Note
Further cable options available,
consult Valeport.

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