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WATSON INDUSTRIES DMS-EGP02 Owner's Manual

Manual is about: GPS Module & Dual Antenna System

Summary of DMS-EGP02

  • Page 1

    Watson industries, inc. Dms-egp02 rev a 03/28/2008 1 dynamic measurement system owner's manual part number: dms-egp02 gps module & dual antenna system watson industries, inc. 3041 melby road eau claire, wi 54703 phone: (715) 839-0628 fax: (715) 839-8248 email: support@watson-gyro.Com.

  • Page 2

    Watson industries, inc. Dms-egp02 rev a 03/28/2008 2 table of contents 1. Introduction ........................................................................................................ 3 2. Product description.......................................................................................

  • Page 3: Caution!

    Watson industries, inc. Dms-egp02 rev a 03/28/2008 3 caution! Watson sensors are rugged devices that have been used successfully in a number of harsh environments. The components have been qualified to withstand a mechanical shock of 200g 's or greater, and most enclosures provide an added level of ...

  • Page 4

    Watson industries, inc. Dms-egp02 rev a 03/28/2008 4 velocity scale factors can be handled through simple changes in the scale factor stored in the eeprom in the microprocessor. This can be done with a pc and the assistance of the factory. Installation orientation the connector face of the unit must...

  • Page 5

    Watson industries, inc. Dms-egp02 rev a 03/28/2008 5 operation initialization ideally, the dms should be stationary and level when it is turned on. If not, the sensor readings may not be accurate after initialization. The time required for the initialization process is not the same for every type of...

  • Page 6

    Watson industries, inc. Dms-egp02 rev a 03/28/2008 6 bank and elevation are obtained directly from the accelerometers - no gyro stabilization. No heading information is available. Angular rate sensors are not close-loop bias corrected. The reference mode can be selected either through the terminal m...

  • Page 7

    Watson industries, inc. Dms-egp02 rev a 03/28/2008 7 1. A single letter and a space used to indicate the start of the data string. The letter “g” indicates the start of an inertial data string with successful gps data input. The letter “i” indicates the start of an inertial data string with gps disa...

  • Page 8

    Watson industries, inc. Dms-egp02 rev a 03/28/2008 8 eeprom of the unit (see appendix a). In addition, more channels are available for output (see appendix a). The system is protected from inadvertent write-over of the eeprom by requiring two spacebar commands during the initialization interval to a...

  • Page 9

    Watson industries, inc. Dms-egp02 rev a 03/28/2008 9 2. An “i” or “i” sets the unit to inertial mode. This is the default mode at power up and is the normal operating mode. Switching to this mode clears the reference command mode. This will also disable the logic input reference command and free mod...

  • Page 10

    Watson industries, inc. Dms-egp02 rev a 03/28/2008 10 analog outputs analog signals are output from a 12 bit digital to analog converter with a series resistor to protect the analog buffer amplifier. The output range for all of the analog output channels is ± 10 volts with respect to the common sign...

  • Page 11

    Watson industries, inc. Dms-egp02 rev a 03/28/2008 11 output logic commands initialization lasts 5 seconds, during which time the "ready" signal is set low (0v). Once initialization is complete, the "ready" signal is set high (+5vdc). The ready signal is on pin 9 of the 25 pin connector. Input logic...

  • Page 12

    Watson industries, inc. Dms-egp02 rev a 03/28/2008 12 specifications attitude range: bank ±180° range: elevation ±75° resolution: 0.02° binary mode (14 bit) analog scale factor: 18°/v ±10v output accuracy: static ±0.25° * accuracy: dynamic ±2% heading range: 0° - 360° resolution: 0.02° binary mode (...

  • Page 13

    Watson industries, inc. Dms-egp02 rev a 03/28/2008 13 figure 1 up position - receive from 9-pin connector this is non-gps mode. Allows keyboard commands to be input into the unit. Down position – receive from gps module. This is the gps mode. Keyboard commands are not recognized..

  • Page 14

    Watson industries, inc. Dms-egp02 rev a 03/28/2008 14 connections / dimensions 25 pin male d-sub power/analog output connector 9 –pin female d-sub rs-232 serial communication connector pin description pin description pin description 1 power ground * 15 elevation angle analog output 1 no connection 2...

  • Page 15

    Watson industries, inc. Dms-egp02 rev a 03/28/2008 15 figure 3 antenna dimensions warning rough handling, dropping, or miswiring this unit is likely to cause damage..

  • Page 16

    Watson industries, inc. Dms-egp02 rev a 03/28/2008 16 disclaimer the information contained in this manual is believed to be accurate and reliable; however, it is the user’s responsibility to test and to determine whether a watson industries’ product is suitable for a particular use. Suggestion of us...

  • Page 17

    Watson industries, inc. Dms-egp02 rev a 03/28/2008 17 service watson industries, inc. Has no service outlets. All service is performed at the factory. In order to insure prompt service, prior to returning units for repair please call, write or fax: watson industries, inc. 3041 melby road eau claire,...

  • Page 18

    Watson industries, inc. Dms-egp02 rev a 03/28/2008 18 appendix a the following outputs are available via the rs-232 serial link. Their full scale ranges are listed for both decimal and binary format. Inertial output full scale decimal full scale binary time since reset 65,535 seconds 16,383 seconds ...

  • Page 19

    Watson industries, inc. Dms-egp02 rev a 03/28/2008 19 determining and setting output channels to determine which channels are present. Hook the unit up to your computer’s serial port. Use a terminal program to interface with the unit. Make sure the switch is in the up position so that unit can recei...

  • Page 20

    Watson industries, inc. Dms-egp02 rev a 03/28/2008 20 setting output format there are two output formats: decimal output – “_” command. Binary output – “^” command. To change the output format: hook the unit up to your computer’s serial port. Use a terminal program to interface with the unit. Make s...

  • Page 21

    Watson industries, inc. Dms-egp02 rev a 03/28/2008 21 setting velocity mode: hook the unit up to your computer’s serial port. Use a terminal program to interface with the unit. Make sure the switch is in the up position so that the unit can receive computer commands. Turn on unit. Wait for the start...

  • Page 22

    Watson industries, inc. Dms-egp02 rev a 03/28/2008 22 appendix b sensor test instructions tests within this section have been designed to allow the user to verify the correct operation of the sensor without the use of elaborate test equipment other than a means of accurately observing the outputs. T...

  • Page 23

    Watson industries, inc. Dms-egp02 rev a 03/28/2008 23 b.4 leveled accelerometer test after successful initialization, place the sensor on a level surface, and observe the pitch and roll displacement signals as well as acceleration outputs. The forward, lateral and vertical outputs should correspond ...

  • Page 24

    Watson industries, inc. Dms-egp02 rev a 03/28/2008 24 appendix c 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 data word msb lsb as the data words are received, the lsb is shifted left to shift out the sign bit. The msb is then connected to the lsb as a 16 bit word. This word is then shifted left to shift out the...