Valeport MIDAS ECM User manual

MIDAS ECM - OPERATING MANUAL
Document ID
MANUAL-738407771-1 | issue: 1.3
Date:
January 2022
This confidential document was prepared by the staff of Valeport Limited, the Company, and is the
property of the Company, which also owns the copyright therein. All rights conferred by the law of
the copyright and by virtue of international copyright conventions are reserved to the Company.
This document must not be copied, reprinted or reproduced in any material form, either wholly or in
part, and the contents of this document, and any method or technique available there from, must
not be disclosed to any other person whatsoever without the prior written consent of the Company.
© 2022 Valeport Ltd
Valeport Ltd
St Peter's Quay
Totnes TQ9 5EW
United Kingdom
Phone:
email:
Web:
[phone]
[email protected]
www.valeport.co.uk
As part of our policy of continuous development, we reserve the right to alter, without prior notice,
all specifications, designs, prices and conditions of supply for all our equipment

Contents
©2022 –Valeport Ltd
Page | b
Table of Content
1. Introduction..................................................................................................................1
2. Specifications...............................................................................................................2
2.1. Sensor Specifications..........................................................................................................2
2.2. Mechanical Specifications...................................................................................................3
Materials ............................................................................................................................3
Connectors.........................................................................................................................3
2.3. Performance Specifications.................................................................................................3
3. Installation....................................................................................................................4
3.1. Communications With PC ...................................................................................................4
3.2. Deploying the MIDAS ECM.................................................................................................5
Real Time Operation..........................................................................................................6
Self-Recording Operation...................................................................................................6
LED Flashing Sequence ....................................................................................................6
3.3. Altimeter Configuration........................................................................................................6
4. Recovery......................................................................................................................7
5. Sample Battery Lifetime Calculations...........................................................................8
5.1. Calculations - Based on Memory........................................................................................8
Continuous Data Sampling - 8Hz.......................................................................................8
Burst Sampling - 4Hz.........................................................................................................8
Profiling..............................................................................................................................8
A Note About Removable Memory.....................................................................................9
5.2. Calculations - Based on Batteries.....................................................................................10
Continuous data sampling - 8Hz......................................................................................10
Burst sampling - 4Hz........................................................................................................10
A Note About Rechargeable Cells....................................................................................11
6. Maintenance ..............................................................................................................12
6.1. Changing Batteries............................................................................................................12
6.2. Seals..................................................................................................................................14
O-Rings............................................................................................................................14
7. Wiring Information......................................................................................................15
7.1. Switch Plug........................................................................................................................15
7.2. 3m Y Lead (RS232)...........................................................................................................15
7.3. 3m Switched Y Lead (RS485 & RS422)...........................................................................16
7.4. Altimeter Interface (optional).............................................................................................16
8. Ordering and Part Numbers .......................................................................................17
Appendix 1: FAQ’s ...........................................................................................................19

MIDAS ECM - Operating Manual
MANUAL-738407771-1 | issue: 1.3
Page | 1
©2022 –Valeport Ltd
1. Introduction
This manual covers the specification, wiring details and basic maintenance procedures for the
Valeport MIDAS ECM Electromagnetic Current Meter. Full details of how to operate the instrument
with the DataLog Express software supplied are given in a separate manual.
As standard, the MIDAS ECM system consists of the following components:
•Titanium or Acetal housed instrument
•Stainless steel deployment cage
•3m Y lead (interface to PC)
•Switching Plug
•Basic maintenance tools and spare O-rings
•DataLog Express Software CD
•Operating Manual
•Transit case
In addition, the following components may be supplied as optional extras:
•RS485 communications adapter
•RS422 communications adapter
•FSK modem communications adapter (includes PCB inside the instrument)
•Various lengths & types of signal cable are also available
Instruments are often supplied (on request) with minor adjustments to the above list, such as
a 5m Y lead instead of a 3m Y lead for example. Such variations will be detailed on the in-
strument packing list, and not in this manual
If you have any questions about the operation of the instrument, which are not answered by this
manual, please contact your supplier if appropriate, or contact Valeport Ltd directly at the address
given at the front of this manual.

Section 2 | Specifications
©2022 –Valeport Ltd
Page | 2
2. Specifications
2.1. Sensor Specifications
The unit is fitted with the following sensors as standard:
Current Speed
Current Direction
Type:
Valeport 11cm discus EM sensor
Valeport flux gate compass
Range:
0 – 5m/s
0 – 360°
Accuracy:
± (1% of reading + 0.005m/s)
± <1°
Resolution:
0.001m/s
0.001°
It may also be fitted with the following optional sensors:
Conductivity
Pressure
Type:
Valeport inductive coils
Strain Gauge
Range:
0 - 80mS/cm
Various available to 500Bar max
Accuracy:
± 0.01mS/cm
±0.04% range
Resolution:
0.002mS/cm
0.001% range
Temperature
Sound Velocity
Type:
Fast response PRT
Valeport digital time of flight
Range:
-5 to +35°C
1400 –1600m/s
Accuracy:
± 0.01°C
±0.03m/s
Resolution:
0.002°C
0.001m/s
The MIDAS ECM is technically capable of supporting other sensor types, such as Turbidity,
Dissolved Oxygen, Fluorometer, Altimeter etc. Such sensors require additional user atten-
tion, such as control of output gain or regular calibration
MIDAS ECM units fitted with such sensors are, therefore, not compatible with DataLog Ex-
press software and users should run DataLog 400 or DataLog Pro software instead.
The EM Current meter sensor is rated to 5000m. In order to operate to a depth of 5000m, a
6000m (600 Bar) rated pressure sensor is fitted.
The maximum operational depth of the Titanium housed instrument is 5000m.
The maximum operational depth of the Acetal housed instrument is 500m
if you see an instrument engraved as shown in the pic-
ture to the right, this is a reference to the pressure sen-
sor, not the instrument –be careful! The instrument is
rated to 5000m (500bar).

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Page | 3
©2022 –Valeport Ltd
2.2. Mechanical Specifications
Materials
Housing:
Titanium or Acetal, as specified at time of purchase
Exceptions:
EM current sensor is polyurethane
Cage:
Stainless steel (316 grade) with polypropylene clamping brackets
Dimensions:
Instrument - 150mm Ø, 700mm long (including connector)
Cage –210mm Ø x 732mm long
Weight:
20kg (titanium), 11kg (Acetal).
Depth Rating:
5000m (Titanium), 500m (Acetal)
Connectors
Instrument:
10 pin female SubConn bulkhead type (MCBH10F) with lock ring.
(If fitted with altimeter connection–6 pin male SubConn bulkhead type
(MCBH6F) with lock ring)
Comms Cable:
Valeport 3m Y lead. 10 pin male Subconn line type (MCIL10M) to instru-
ment, 2 x 4mm bunch pins to external power, 9 pin female D type to PC.
Switching Plug:
10 pin male Subconn line type (MCIL10M), with lock ring. Note that the
switch cap contains wiring links to activate the instrument
It is not a dummy plug
2.3. Performance Specifications
Memory:
16Mb solid state memory (upgradeable in 16Mb steps to 64Mb)
Internal Power:
8 x 1.5V alkaline D cells. The unit will accept 8 x 3.6V Lithium D cells with
no alterations required. Do not mix battery types.
External Power:
Between 9 and 30V DC.
Current Drain:
~140mA at 12V when running, and 0.25mA when in sleep mode.
Sampling Rate:
1, 2, 4 or 8Hz (synchronised)
Data Output:
RS232, RS485, RS422, FSK depending on pin selection. Baud rate is
user selectable from 2400 to 460800.
If FSK option is fitted, baud rate will be fixed at 34800

Section 3 | Installation
©2022 –Valeport Ltd
Page | 4
3. Installation
The standard system is supplied in an ABS transit case, together with any communications adapt-
ers ordered. Any additional lengths of signal cable are packed separately.
3.1. Communications With PC
The MIDAS ECM can be set up and interrogated using the DataLog Express software supplied
(DataLog 400 or DataLog Pro for more complex systems). Please refer to the separate manual for
details of how to use the software.
To connect the instrument directly to a PC for RS232 communications, use the 3m Y lead supplied.
This lead is fitted with a 10 pin Subconn type connector, which should be plugged directly into the
connector on the top of the housing (or to a length of signal cable). The lead also features 2 x
4mm bunch pins for application of external power if required and a 9 way D type connector which
should plug directly into a spare communications port on the back of the PC.
If non-RS232 communications are to be used, via the optional RS485, RS422 or FSK methods,
then the appropriate adapter should be used. Each adapter is supplied with an alternative Y lead,
which should be connected as follows:
If FSK option is fitted, baud rate will be fixed at 34800
Comms Method
Adaptor Part No.
Connections
RS485
0400029
Connect 15 pin D type and 4mm plugs from Y lead into
adapter. Connect 9 pin D type from adapter to PC, and
4mm plugs from adapter to external power, as indicated on
adapter housing.
RS422
0400030
Connect 15 pin D type and 4mm plugs from Y lead into
adapter. Connect 9 pin D type from adapter to PC, and
4mm plugs from adapter to external power, as indicated on
adapter housing.
FSK
0400005
Connect 4mm plugs from Y lead into adapter, leaving D
types unconnected (FSK uses power and signal on just two
wires). Connect 9 pin D type from adapter to PC, and
4mm plugs from adapter to external power, as indicated on
adapter

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Page | 5
©2022 –Valeport Ltd
3.2. Deploying the MIDAS ECM
All parts of the standard system (with the exception of the top part of the 3m Y lead) are designed
for immersion. All communications adapters (RS485, RS422, FSK) are splash proof, but should be
sited in a dry place, as close to the PC as possible.
When ordering the MIDAS ECM your preference for operation: Sensors Upward Facing or Sensors
Downward Facing must be specified. This is so the compass module is fitted correctly. It is imper-
ative that the instrument is deployed in the correct orientation.
The housing will be marked accordingly:
The MIDAS ECM is supplied with a stainless-steel protective cage, but care should still be taken at
all times not to damage the instrument.
The frame can be used to deploy the MIDAS ECM either way up. For Sensors Upward Facing the
ring above the sensor endcap can be used. For deployment with the Sensors Downward Facing
the provided strop should be used and fitted as shown below.
For fixed deployments, the user may wish to remove the cage and use the grooves in the instru-
ment housing as clamping points.

Section 3 | Installation
©2022 –Valeport Ltd
Page | 6
Real Time Operation
For real time data output, connect the signal cable to the 10 pin Subconn connector on the instru-
ment. All Valeport signal cables include a suspension point for strain relief, and a similar arrange-
ment is recommended for other cable types. Connect the top end of the cable to a PC using the
appropriate method as described above.
Self-Recording Operation
For self-recording only deployments, the instrument is switched on by insertion of the SubConn
style switch plug. This plug must be inserted for the unit to operate.
the switch plug is NOT just a dummy plug; it contains links between some of the pins as de-
scribed in Section 5, which are used to turn the instrument on
LED Flashing Sequence
The MIDAS ECM is fitted with an LED visible through a polycarbonate window in the battery pack.
The LED will flash as detailed below to indicate various states.
Continuous ON for 15 seconds
Occurs when the Switch Plug or cable is connected, indicating
that instrument is on and awaiting communication
1Hz Continual Flashing
Insufficient Power. Change internal batteries, or completely re-
move external power, and apply higher voltage
Continuous ON for 2 seconds
Indicates the start of Burst Sampling pattern
5 Rapid Flashes
Indicates the end of Burst Sampling pattern. The duration of the
burst may be calculated as the time between the start and stop
LED sequences, less 5 seconds.
3.3. Altimeter Configuration
Systems can be specified with Tritech PA series Altimeters. For the Midas ECM to correctly com-
municate with the Altimeter, it needs to be configured as follows:
Communication
RS232
Use
Free Run ASCII/Zero No Detect (ZNE)
Data Format
9600, 1, 8, 1
Power
12V

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Page | 7
©2022 –Valeport Ltd
4. Recovery
On recovery, data can be extracted to PC via the 3m Y lead. This procedure is covered in the sep-
arate software manual for DataLog Express or DataLog 400 / DataLog Pro as applicable.
To prolong the lifetime of the instrument the following procedures should be carried out once the
instrument has been recovered:
•Remove any significant growth from the instrument, paying attention to the face and electrodes
of the EM sensor, the core of the conductivity sensor (if fitted), and the face of the sound veloc-
ity sensor (if fitted). Be careful not to damage the sensors. A high pressure water jet or stiff
(not metal) brush is suitable –a hard toothbrush is ideal.
•Remove any significant growth from the pressure sensor port. Take care not to introduce any
sharp objects onto the sensor face –this may result in sensor damage.
•Check instrument for signs of damage.
•Rinse the instrument in fresh water
•Dry the instrument if possible, paying particular attention to the sensors and connector.
•Repack the instrument in the transit case provided.

Section 5 | Sample Battery Lifetime Calculations
©2022 –Valeport Ltd
Page | 8
5. Sample Battery Lifetime Calculations
5.1. Calculations - Based on Memory
Lifetime based on memory is dependent on the sensors fitted. All parameters use 2 bytes of
memory per sample, with the exception of the optional sound velocity sensor which uses 4 bytes.
With a typical configuration of Speed, Direction and Pressure, lifetime can be calculated as follows:
Total memory used per record is 2 x 3 = 6 bytes.
In Profile mode, each record is also assigned a date/time stamp, which uses a further 7
bytes.
The 16 Mbyte memory actually contains 16,777,216 bytes. Allowing a small amount of memory
usage for header files, the memory will store over 1.2 million records in Profiling mode, and over
2½ million records in other modes. The length of time that this memory will last for obviously de-
pends on sampling scenario. Here are three examples:
Continuous Data Sampling - 8Hz
•Memory used per second is 6 x 8 bytes = 48 bytes
•Total memory fitted is 16,777,216 bytes
•Seconds before memory full is 16,777,216 / 48 = 349,500 seconds approximately
-equivalent to 97 hours
•This period could be doubled by sampling at 4Hz
Burst Sampling - 4Hz
Sampling 1 minute in every 10 minutes | recording all data points:
•Memory used per burst is 6 bytes x 4Hz x 60 seconds = 1440 bytes
•The memory will be full after 16,777,216 / 1440 bursts = 11650 bursts
•At a 10 minute cycle time, this is 116500 minutes
-equivalent to 80 days.
Profiling
5000m cast | measuring every metre
•1 reading every metre of both descent and ascent
•This means 5000 data points descending, and a further 5000 ascending
•Each record consists of 6 bytes of data and 7 bytes of time stamp
-Each record therefore uses 13 bytes
•A single cast will take 10,000 such records and will therefore use 130,000 bytes.
•The 16Mbyte memory will therefore hold approximately 125 casts worth of data.

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Page | 9
©2022 –Valeport Ltd
A Note About Removable Memory
We are sometimes asked whether we offer these devices with removable memory. The answer is
no we don’t, but there are sound reasons for this. It is natural to think that since removable
memory cards are now the norm in consumer electronics, they must be “state of the art” and there-
fore desirable in all applications, but this is not necessarily the case.
•An essential feature of an underwater instrument is that it is water-tight; this is achieved by us-
ing various seals on the mechanical parts of the device. Every time that one of these seals is
broken and remade, it introduces a small risk that the seal is not correctly made, and the in-
strument could leak. The fewer times that the device has to be opened, the better –you cer-
tainly wouldn’t want to do it after every profile to get the memory card out.
•All memory cards are susceptible to ESD shock (static electricity) while being handled. We
take the view that the value of your data means it shouldn’t be exposed to the possibility of this
risk, which could result in loss of all data on the card.
•Memory cards are not particularly efficient at storing data –they will only accept minimum
sized lumps of data at a time. This may be perfect for a camera where you instantly generate
a few Mbytes, not so for an application where you only want to store a few bytes of data at a
time.
•From a practical point of view, the time taken to connect a cable and extract the data to PC is
actually typically much less than the time to open the device, remove the memory, replace the
memory, and close the device up again.
•The implementation of removable memory is not technically difficult, but we believe that the
disadvantages currently outweigh any possible advantages in this product and its applications.
However, should circumstances change it will of course be considered for future product en-
hancements.

Section 5 | Sample Battery Lifetime Calculations
©2022 –Valeport Ltd
Page | 10
5.2. Calculations - Based on Batteries
The MIDAS ECM will function with a voltage supply of between 9 and 30V DC. The voltage output
of the 8x D cell battery pack will vary according to the type of cell fitted. The most likely cells to be
used will be standard alkaline type (1.5v each) or Lithium cells (3.6v each), giving a 12v nominal
output for alkaline cells, or 28.8v nominal for Lithium cells. The following calculations are based on
the same sampling scenarios as the memory calculations, using figures for a 12v alkaline battery
pack. Each example also gives a figure for a Lithium battery pack, calculated from a basic ratio of
alkaline to Lithium performance.
In all examples, it is taken that an 8 D cell alkaline battery pack will have a nominal capacity of
14Ah, and will be 75% efficient (total available charge, 10.5Ah), and that an 8x D cell Lithium pack
will have a nominal capacity of 17.5Ah, and will be 95% efficient (total available charge, 16.6Ah).
Continuous data sampling - 8Hz
•At 12V, the instrument draws 140mA when sampling
-Total charge available is 10500mAh
•Number of hours available is therefore 10500mAh / 140mA = 75 hours
-equivalent to just over 3 days
•For Lithium cells, a similar calculation gives around 11 days
The instrument is effectively operating continuously when in Trip sampling mode, so similar
calculations will apply
Burst sampling - 4Hz
Sampling for 1 minute in every 10 minutes:
•At 12V, instrument draws 140mA when sampling
-plus 140mA for 5 seconds at the start of each burst
-it draws 0.25mA when in sleep mode between bursts
•In this scenario:
-the instrument will draw 140mA for 65 seconds
-then 0.25mA for 535 seconds. On average, it will draw:
(140 x 65) + (0.25 x 535)
(65 + 535)
= 15.39mA
•Total charge available is 10500mAh.
•Number of hours available is therefore 10500mAh / 15.39mA = 682 hours.
-equivalent to approximately 28 days.
•For Lithium cells, a similar calculation gives approximately 105 days.
The above examples are intended as guides only
Valeport accepts no responsibility for variation in actual performance
Note that performance of individual battery cells is not always consistent

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Page | 11
©2022 –Valeport Ltd
A Note About Rechargeable Cells
We are often asked if rechargeable cells can be used. Yes, it is possible to use rechargeable cells,
but we do not recommend it:
•Firstly, the cells cannot be recharged in-situ due to the possibility of the cells giving out gas in-
side a sealed instrument, effectively turning it into an explosive device. Whilst this risk is
small, it does exist and therefore must be considered. The risk could be overcome by adding
an air vent to the housing, but this could compromise the water-tight nature of the housing.
Better to remove the risk altogether.
•Secondly, the most commonly used rechargeable cells are NiCad type. These only operate at
around 1.2V maximum and have about 25% of the capacity of an alkaline cell; they therefore
give greatly reduced operating times.
•Modern Li-ion or NiMH cells are more efficient than NiCad cells, but do not yet compare with
alkaline cells. They are also considerably more expensive.

Section 6 | Maintenance
©2022 –Valeport Ltd
Page | 12
6. Maintenance
The MIDAS ECM is completely solid state, and therefore requires very little maintenance. Other
than keeping the instrument relatively clean (as described in Section 3.3, Recovery), the only pro-
cedure that the customer will be required to carry out on a regular basis is to change the batteries.
This Chapter also covers details of the O-rings that are fitted to the instrument, and which should
be checked periodically for damage and replaced if necessary.
6.1. Changing Batteries
The MIDAS ECM accepts 8 x D cells, of either 1.5V alkaline or 3.6V Lithium type. These cells are
arranged in series, so the output voltage is 12V (alkaline) or 28.8V (Lithium). Some example sce-
narios for the operational life of these batteries are given in Section 5.
The batteries are located in a holder in the top of the instrument, and should be accessed by re-
moving the connector bulkhead.
1.
2. Remove the instrument from the protective cage by loosening the 4 x M10 nuts on the top of the
cage. Lift off the top cage ring and the 4 spacer tubes below.

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Page | 13
©2022 –Valeport Ltd
3. Lift the instrument out of the cage, complete with the polypropylene mounting brackets. Take
care to catch the central spacer tubes as you lift.
4. Remove the 3 M5 x 20 socket cap screws in the connector bulkhead, using the Allen key pro-
vided. Note that on titanium instruments these screws are also titanium, and should be re-
placed with titanium screws if lost. Other materials may suffer galvanic corrosion and may be
destroyed.
5. Without twisting or putting undue stress on the Subconn connector slide the bulkhead and at-
tached battery pack out of the main housing. A slot between the tube and the bulkhead allows
levering with a screwdriver if necessary. Take care not to scratch the bore of the tube.
6. A lead connects the battery pack to the electronics inside the tube. This may be disconnected
at the battery pack if required, for ease.
7. Replace the batteries.
8. Check the condition of the bore seal O-rings, and apply a light coating of silicon grease. En-
sure that both they and the anti-extrusion rings (titanium instruments only) sit in the groove
correctly, and are free from damage. Replace them if necessary (refer to Section 4.2).
9. Reattach the connector to the electronics if necessary, and gently slide the battery pack back
into the tube, ensuring that the fixing holes are correctly aligned. Again, take care not to
scratch the bore.
10. Replace the 3 x M5 titanium screws, using a small amount of grease (supplied). Do not force
the screws, just tighten firmly.
11. Finally, slide the instrument back into the protective cage, refitting the spacers and top ring.
Secure the ring in place with the 4 x M10 nuts.

Section 6 | Maintenance
©2022 –Valeport Ltd
Page | 14
6.2. Seals
The MIDAS ECM is kept watertight by using a double O-ring seal at each end of the housing, alt-
hough the customer should have no reason to open any seal other than that at the battery end.
A set of spare O-rings is included with the equipment. If an O-ring needs replacing, be sure to use
the correct size. If obtaining further spare O-rings from an alternative source, be sure to obtain the
correct material (signified by the last 4 digits of the O-ring code number).
O-ring size: 200-158-4470
O-Rings
To help preserve the watertight nature of the equipment, please observe the following guidelines:
•Ensure that all O-rings are free from cuts, abrasions or perishing.
•Ensure that all O-rings are free from dirt, grit, sand, hair and other foreign objects.
•Whenever an O-ring seal is opened (e.g. when changing batteries), ensure that a light coating
of silicon grease is applied to the O-ring before the seal is closed.
•Ensure that all O-ring protected seals are tightened.

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Page | 15
©2022 –Valeport Ltd
7. Wiring Information
7.1. Switch Plug
10 Way Male SubConn
Function
1
Link to Pin 10
2
NC
3
NC
4
NC
5
NC
6
NC
7
NC
8
NC
9
NC
10
Link to Pin 1
7.2. 3m Y Lead (RS232)
END 1:
10 Way SubConn
MCIL10M+DLSA-M
END 2:
BANANA PLUG
END 3:
9 Way D-TYPE
FUNCTION
PIN
CONNECTOR
PIN
PIN
1
Black 4mm Plug
1
-V SUPPLY
2
Red 4mm Plug
2
+V SUPPLY
3
RS422 TXA (N.C.)
4
RS422 TXB (N.C.)
5
RS422 RXA (N.C.)
6
RS422 RXB (N.C.)
7
2
RS232 TX (out of unit)
8
3
RS232 RX (in to unit)
9
5 (link to 1,6,8,9)
RS232 GND
10 Linked to Pin 1
(Join in Y-splice)
INTERNAL BATTERY
ENABLE

Section 7 | Wiring Information
©2022 –Valeport Ltd
Page | 16
7.3. 3m Switched Y Lead (RS485 & RS422)
10 Way Male
SubConn
S
W
I
T
C
H
B
O
X
4mm Banana
Plugs
15 Way D
Type
9 Way D Type
Function
1
Black
Power Ground
2
Red
Power +V
3
9
RS422 TxA
4
10
RS422 TxB
5
11
RS422 RxA
6
12
RS422 RxB
7
2
RS232 Tx (To PC)
8
3
RS232 Rx (From PC)
9
5
5 (link to 1,6,8,9)
RS232 Ground
10
SHELL
SHELL
Internal Battery Enable
7.4. Altimeter Interface (optional)
End 1:
Altimeter SubConn MCIL6M
End 2:
TriTech Connector (RS232)
Function
Pin
Pin
1
4
Sensor Power (0V)/RS232 GND
2
1
RS232 Rx into Logger
4
3
Sensor Power (+24V)
6
3
2
RS232 Tx Out of Logger
5
6 (SCREEN)
Chassis Ground

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Page | 17
©2022 –Valeport Ltd
8. Ordering and Part Numbers
Part No.
Description
Basic Instruments
0808007A
Self-recording / Direct reading ElectroMagnetic Current meter
Titanium housing
Fitted with:
•11cm discus sensor and compass measuring speed and direction
•16Mbyte Flash memory
•internal battery pack (8 x 'D' cell)
Supplied with:
-Deployment frame
-SubConn switch plug
-DataLog x2 Windows software package
-3m “Y” lead (probe to PC and power supply)
-RS232/USB adapter, tool kit, operating manual and system transit case
0808008A
Self-recording / Direct reading ElectroMagnetic Current meter
Acetal housing.
Fitted with:
•11cm discus sensor and compass, measuring speed and direction
•16Mbyte Flash memory
•internal battery pack (8 x 'D' cell)
Supplied with:
-Deployment frame
-SubConn switch plug
-DataLog x2 Windows software package
-3m “Y” lead (probe to PC and power supply)
-RS232/USB adapter, tool kit, operating manual and system transit case

Section 8 | Ordering and Part Numbers
©2022 –Valeport Ltd
Page | 18
Options
The part numbers below are full package options as above but with extra parameters or commu-
nication variants.
0808007B
MIDAS ECM | Titanium housing | standard package
with FSK communications
0808007C-XX
MIDAS ECM | Titanium housing | standard package
with Pressure
0808007D-300
MIDAS ECM | Titanium housing | standard package
with Pressure & FSK communications
0808007E-XX
MIDAS ECM | Titanium housing | standard package
with CTD
0808007F-XX
MIDAS ECM | Titanium housing | standard package
with CTD & FSK communications
0808007G-XX
MIDAS ECM | Titanium housing | standard package
with CTD & Turbidity
0808007H-XX
MIDAS ECM | Titanium housing | standard package
with CTD, Turbidity & FSK communications
0808008B
MIDAS ECM | Acetal housing | standard package
with FSK communications
0808008C-XX
MIDAS ECM | Acetal housing | standard package
with Pressure
0808008D-50
MIDAS ECM | Acetal housing | standard package
with Pressure & FSK communications
0808008E-XX
MIDAS ECM | Acetal housing | standard package
with CTD
0808008F-50
MIDAS ECM | Acetal housing | standard package
with CTD & FSK communications
0808008G-XX
MIDAS ECM | Acetal housing | standard package
with CTD & Turbidity
0808008H-50
MIDAS ECM | Acetal housing | standard package
with CTD, Turbidity & FSK communications
XX on the code denotes pressure transducer range: select from 10, 50, 100, 300 or 600 bar
Accessories for Direct Reading Operation
0400EA50CD
50m Signal cable on hand reel
Fitted with SubConn 10 way connectors.
0400EA100CD
100m Signal cable on hand reel
Fitted with SubConn 10 way connectors.
0400EA200CD
200m Signal cable on hand reel
Fitted with SubConn 10 way connectors.