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© 2018 Valeport Ltd

0606829a - MIDAS CTD+

Page 4

2.  Specifications

2.1.  Sensor Specifications

The unit is fitted with the following standard sensors:

Conductivity

Type:

Pressure balanced inductive coils

Range:

0.1 to 80 mS/cm

Accuracy:

± 0.01mS/cm

Resolution:

0.004mS/cm

Pressure

Type:

Strain Gauge

Range:

20Bar absolute (approx 200m water depth)

as standard, others available on request

Accuracy:

± 0.1% Full scale

Resolution:

0.005% Full scale

Temperature

Type:

Fast response PRT

Range:

-5 to +35°C

Accuracy:

± 0.01°C

Resolution:

0.002°C

Summary of Contents for MIDAS CTD+

Page 1: ...l form either wholly or in part and the contents of this document and any method or technique available therefrom must not be disclosed to any other person whatsoever without the prior written consent...

Page 2: ...tions 11 3 Installation 11 3 1 Communications With PC 11 3 2 Deploying the MIDAS CTD on its Own 13 3 3 Deployment Of The Water Sampler System 18 4 Maintenance 19 4 1 Changing Batteries 20 4 2 O Ring S...

Page 3: ...t with bulkhead mounted sensors Stainless steel deployment cage 3m Y lead interface to PC Switching Plug Basic maintenance tools and spare o rings DataLog Pro Software Operating Manual Transit case In...

Page 4: ...y Type Pressure balanced inductive coils Range 0 1 to 80 mS cm Accuracy 0 01mS cm Resolution 0 004mS cm Pressure Type Strain Gauge Range 20Bar absolute approx 200m water depth as standard others avail...

Page 5: ...volts or amps as standard the accurate measurement of this signal is the function of the primary sensor calibration which is given in the calibration section of this manual This primary calibration ha...

Page 6: ...mm long including connector Cage 750mm long x 140mm x 120mm Weight in cage 20kg Titanium air 8 5kg water 12kg Acetal air Depth Rating 6000m Titanium unless shallower rated pressure sensor fitted 500m...

Page 7: ...leport MIDAS CTD CTD 1 x WS Envirotech EcoLab system Weight 48kg excluding instruments and bottles 2 3 2 3 Sample Bottles Materials PVC Volume 2 5litre Weight 2kg 2 4 Performance Specifications Memory...

Page 8: ...x 12 bytes 96 bytes Total memory fitted is 8 388 608 bytes Number of seconds before memory full is 8 388 608 96 approx 87 381 seconds This is equivalent to 24 hours This period can be doubled by samp...

Page 9: ...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 8 D cell Lithium pack will have a nominal capacity of 17 5Ah a...

Page 10: ...t It draws 0 25mA when in sleep mode between bursts In this scenario then the instrument will draw 60mA for 65 seconds and then 0 25ms for 535 seconds On average it will draw 60 65 0 25 535 6 72mA 65...

Page 11: ...ms Method Adaptor Part no Connections RS485 0400029 Connect 15 pin D type and 4mm plugs from Y lead into adaptor Connect 9 pin D type from adaptor to PC and 4mm plugs from adaptor to external power as...

Page 12: ...to operate 3 2 3 Recovery On recovery data can be extracted to PC via the 3m Y lead This is covered in Section 2 To prolong the lifetime of the instrument the following procedures should be carried o...

Page 13: ...move all the packaging materials The following components should be present as illustrated 12x 40cm stainless steel rods 12x 20cm stainless steel rods 12x M5 stainless steel screws 1x stainless steel...

Page 14: ...smaller MIDAS CTD brackets should be positioned directly opposite the EcoLab brackets vertically above each other Also note that the MIDAS CTD is supplied with a fluorometer the clamping brackets for...

Page 15: ...rews provided If the rotor arm is loose it must be secured in the correct position To do this it is necessary to communicate with the instrument using the software This procedure is therefore describe...

Page 16: ...ment to the motor unit The lead may be held to the frame by means of cable ties 3 3 3 Loading The Water Bottles The motor and frame are designed to work with 12 x 2 5 litre water bottles The bottles s...

Page 17: ...re the bottle for deployment ensure that the tap on the side of the bottle is pulled out as far as the stop will allow and that the release screw on the top of the bottle is tightly secured 3 3 4 Rele...

Page 18: ...ery little maintenance Other than performing calibration routines on the sensors detailed in a separate document the user will need to keep the instrument relatively clean and to change the batteries...

Page 19: ...irection 3 Remove the 3 M5 x 20 socket cap screws in the connector bulkhead using the Allen key provided Note that these screws are titanium and should be replaced with titanium screws if lost Other m...

Page 20: ...d of the titanium housing although the customer should have no reason to open any seal other than that at the battery end To help preserve the watertight nature of the equipment please observe the fol...

Page 21: ...no significant air bubbles in this fluid since this will affect the pressure balancing of the housing and may result in damage If there are air bubbles present lay the housing horizontal and position...

Page 22: ...ective rubber cap which is used to prevent the sensor from drying out A small amount of reference solution should be put into the cap before it is fitted for storage The pH and Redox sensors are fille...

Page 23: ...d sensors please see the specific manuals For the latest manuals please download from the following websites Valeport Hyperion Fluorometer www valeport co uk Support Manuals SeaPoint Turbidity Meter w...

Page 24: ...und 2 RED Power V 3 4 5 6 7 2 RS232 Tx To PC 8 3 RS232 Rx From PC 9 5 link to 1 6 8 9 RS232 Ground SHELL 10 Internal Battery Enable Link to RS232 Ground 6 2 Remote Fluorometer Flylead END 1 6 WAY MALE...

Page 25: ...rmation Page 25 6 3 Water Sampler Motor Flylead END 1 5 WAY MALE SUBCONN MCIL5M LOCKING SLEEVE END 2 5 WAY FEMALE SUBCONN MCIL5F LOCKING SLEEVE FUNCTION PIN PIN 1 1 Motor 10V 2 2 Motor 0V 3 3 5V Senso...

Page 26: ...2018 Valeport Ltd 0606829a MIDAS CTD Page 26 7 Warranty...

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