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Valeport Ltd © 2019 

0803805i - Model 803 ECM

Page 16

6.  Maintenance

6.1.  Cleaning

The EM sensor calibration will be affected by large amounts of marine growth as the water flow characteristics
will be altered, so it advisable to periodically clean the sensor.

The sensing electrodes should not be covered in grease or any form of insulating substance.

6.2.  Seal Sizes

Underwater Housing

End Cap, sensor end

2x O-Ring 200-143-4470

End Cap, sensor end

2x Anti-Extrusion Ring BS143

End Cap, connector end 2x O-Ring 200-143-4470

End Cap, connector end 2x Anti-Extrusion Ring BS143

SubConn Connector

2x O-ring 200-121-4470

Summary of Contents for 803

Page 1: ...y material 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 writte...

Page 2: ...Output Communications 9 2 2 2 Changing the Baud Rate 10 2 2 3 Changing Data Rate 10 2 2 4 Changing the Data Format 10 2 2 5 Reading Serial Number and Software Version 11 2 2 6 Changing the Baud Rate o...

Page 3: ...t 18 7 4 RS232 Communications Lead with 4 20mA Analogue Output Pigtail 19 8 Appendix 2 Filter Characteristics 19 8 1 801 802 803 Digital Filter Characteristics Attenuation dB 19 8 2 801 802 803 Digita...

Page 4: ...icle The lightweight design of the instrument leads to minimal effect on the vehicle balance yet permits a depth rating of up to 3000m Titanium version Available as a complete self contained instrumen...

Page 5: ...32 or RS485 factory set Factory default is 4800 baud 8 data bits 1 stop bit no parity bits Baud rate can be changed by user to 2400 4800 9600 or 19200 String format Knots sXX XX TAB sYY YY cr lf m s s...

Page 6: ...Material Black Acetal or Titanium Size 92mm x 237mm length Acetal 76mm x 237mm length Titanium Depth Rating 1000m Acetal 3000m Titanium OEM Head and Electronics Size 76mm x 250mm length Depth Rating...

Page 7: ...Valeport Ltd 2019 Introduction Page 7 1 2 4 3 Dimensions...

Page 8: ...e place of the polished mark or painted dot in diagram below The approximate measurement volume for the sensor is a cylinder projecting from the face of the sensor of diameter 90mm approximate electro...

Page 9: ...unications over long cable lengths 2 2 Operation The unit is made operational by applying power A software program ROVLog is provided to allow easy setup and data display but some users may wish to si...

Page 10: ...on which output mode has been selected The output string format is shown below and is dependant upon the units last entered into the unit sXX XX TAB sYY YY cr lf or sX XXX TAB sY YYY cr lf or sXXXXX...

Page 11: ...am on to the PC Remove the lid of the Y lead box With the Y lead connected to a PSU and the PC turn the power on and press the push button on the side of the KD 485 unit until the EXE led flashes Rele...

Page 12: ...ircuit board inside the instrument board number 0801507A If fitted this board gives a standard analogue output of 5V full scale with 11bit resolution for each of the two channels X and Y axes This wil...

Page 13: ...oth graphical and tabular form in Appendix 2 A characteristic of the filters are that they have a fixed time delay for the output signal i e phase delay is independent of signal frequency If data is b...

Page 14: ...to the 3 way connection on the 0801509D circuit board labeled RS232 Do not adjust the position of the four way Harwin connector with the red and blue wires If the unit has the optional analogue output...

Page 15: ...orrectly fitted cable Check connections and try again Illegible characters Incorrect baud rate In RS232 mode check instrument baud rate and HyperTerminal or ROVLog baud rate In RS485 mode check instru...

Page 16: ...so it advisable to periodically clean the sensor The sensing electrodes should not be covered in grease or any form of insulating substance 6 2 Seal Sizes Underwater Housing End Cap sensor end 2x O R...

Page 17: ...mmunications Lead SubConn Cable Analogue Signal Sockets in cable box Power In Banana Pins RS232 9 way D type Pin Function Pin Pin Function Pin 1 ve Supply Red plug 2 Analogue X X 3 Analogue Gnd X Y 4...

Page 18: ...X Right 4 Analogue X ve 4mm socket Red X Right 5 Analogue Y ve 4mm socket Red Y left 6 Analogue Y ve 4mm socket Black Y left 7 RS232 out of unit 2 8 RS232 into unit 3 9 RS232 ground 5 link to 1 6 8 9...

Page 19: ...Ltd 2019 Appendix 2 Filter Characteristics Page 19 8 Appendix 2 Filter Characteristics 8 1 801 802 803 Digital Filter Characteristics Attenuation dB 8 2 801 802 803 Digital Filter Characteristics Sign...

Page 20: ...Valeport Ltd 2019 0803805i Model 803 ECM Page 20...

Page 21: ...Valeport Ltd 2019 Appendix 2 Filter Characteristics Page 21...

Page 22: ...nnel X 173 Nothing Returns the zero offset for channel Y 174 X_Gain_Factor cr Sets the GAIN_FACTOR for channel X 175 Y_Gain_Factor cr Sets the GAIN_FACTOR for channel Y 176 Nothing Returns the GAIN_FA...

Page 23: ...put format units mm mm s m m s or knots 213 Nothing Returns Output Format units mm s m s or knots 214 X_DAC_Cal_Knots cr Sets X DAC cal for Knots 215 Nothing Returns X DAC cal for Knots 216 Y_DAC_Cal_...

Page 24: ...to a sensor sensor axis and electronics The zero counts are shown on the calibration sheet Gain Factor This is the factor by which the sensors counts per metre sec must be multiplied to normalise it...

Page 25: ...traight line fit 4 Four straight line fit 5 Five straight line fit Thus for example a three line fit calibration for the X channel will be entered in the format shown below note the single space betwe...

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