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Related Manuals for WATSON INDUSTRIES DMS-EGP02
Summary of Contents for WATSON INDUSTRIES DMS-EGP02
- Page 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 Watson Industries, Inc. DMS-EGP02 Rev A 03/28/2008...
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Page 2: Table Of Contents
Appendix C....................... 24 Watson Industries prides itself on solving customer problems and serving their needs in a timely fashion. This manual is intended to facilitate this goal and to provide written information about your product. We ask that you carefully read this manual. -
Page 3: Introduction
Calibration is achieved by using the maintenance software to store data in non-volatile memory within the DMS. The DMS-EGP02 differs from a “standard” DMS with the addition of a Dual antenna GPS system. This allows the DMS to output actual heading instead of relative heading. -
Page 4: Installation
DMS signal system. The mating connector for the Power/Analog Output Connector is a 25 Pin female D-Sub. Both GPS antenna connectors are on the side. For more information on the connectors and pinout of the DMS-EGP02, see Figure 2. Calibration The DMS is calibrated at the factory before it is shipped to the user. -
Page 5: Operation
The message can be read by using a terminal program or by using the terminal mode of Watson Industries’ communication software. The DMS can also be “re-initialized” after it has been turned on. This is especially useful if the sensor has been used in severe maneuvers that have over-ranged the angular rate sensors and caused significant errors to accumulate. -
Page 6: Free Mode
The maximum rate is 71.11 strings per second. See Appendix A for information on how to change the data string. The contents of a typical string are formed as follows: Watson Industries, Inc. DMS-EGP02 Rev A 03/28/2008... - Page 7 The string transmission rate can be improved by reducing the amount of information (data items) transmitted. The data items transmitted can be changed by using special commands to modify the Watson Industries, Inc. DMS-EGP02 Rev A 03/28/2008...
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Page 8: Rs-232 Input Commands
Free Mode Command until the next time the unit is powered up. This mode is used in installation to physically align the unit. Double spacebar at initialization is required for access to this command. Watson Industries, Inc. DMS-EGP02 Rev A 03/28/2008... - Page 9 This will not happen in the decimal or hexadecimal modes because command characters recognized by the system are not produced in those modes. Please note that the signal and power ground are isolated from one another. Watson Industries, Inc. DMS-EGP02 Rev A 03/28/2008...
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Page 10: Analog Outputs
Many other 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. Watson Industries, Inc. DMS-EGP02 Rev A 03/28/2008... -
Page 11: Output Logic Commands
Leave pin open if not in use. Ground to command. NOTE: The digital logic inputs are all disabled if any one equivalent serial command is sent via RS-232. This is to prevent hardware/software conflicts. Watson Industries, Inc. DMS-EGP02 Rev A 03/28/2008... -
Page 12: Specifications
Using velocity data with GPS mode on. Actual accuracy can be calculated as the listed percentage multiplied by the change in value over the entire dynamic maneuver. Specifications are subject to change without notice. Watson Industries, Inc. DMS-EGP02 Rev A 03/28/2008... -
Page 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. Figure 1 Watson Industries, Inc. DMS-EGP02 Rev A 03/28/2008... -
Page 14: Connections / Dimensions
Reference Command Pitch Rate Analog Output ** The user receives on this line. Bank Angle Analog Output Yaw Rate Analog Output * Power Ground & Signal Ground are electrically isolated Figure 2 DMS-EGP02 Watson Industries, Inc. DMS-EGP02 Rev A 03/28/2008... -
Page 15: Warning
Figure 3 Antenna Dimensions Warning Rough handling, dropping, or miswiring this unit is likely to cause damage. Watson Industries, Inc. DMS-EGP02 Rev A 03/28/2008... - Page 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 uses should not be taken as inducements to infringe upon any patents.
- Page 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, WI 54703...
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Page 18: Appendix A
The Flag Bits contains the following information: Description (If Set) GPS ground track heading data loss GPS ground track velocity data loss GPS true heading data loss Reference Command selected GPS enabled Free Mode selected Logic Input Switches disabled Watson Industries, Inc. DMS-EGP02 Rev A 03/28/2008... -
Page 19: Determining And Setting Output Channels
To accept channels type 'N', then hit space bar output data to resume. To make this channel selection the default the next time you power the unit on type in " (a quote mark) Watson Industries, Inc. DMS-EGP02 Rev A 03/28/2008... -
Page 20: Setting Output Format
To set the heading mode to Relative Heading type ‘2’. This is the normal DMS mode (non-GPS). In this mode, the GPS antenna does not need to be connected. To make any of these modes the default the next time you power the unit on type in " (double quote) Watson Industries, Inc. DMS-EGP02 Rev A 03/28/2008... -
Page 21: Setting Velocity Mode
To calibrate the heading, type “G”, only uppercase will be accepted. It is ESSENTIAL that this be done if the antennas are not physically aligned to the vehicle forward vector. Failure to do this may have serious consequences on dynamic error corrections. Watson Industries, Inc. DMS-EGP02 Rev A 03/28/2008... -
Page 22: Appendix B
The values of Forward, Lateral and Vertical Acceleration should remain at the values when level. Repeat the test for the roll axis of the sensor. Under this test, Y and Z acceleration will read 0.71G and the X acceleration will retain its value at level. Watson Industries, Inc. DMS-EGP02 Rev A 03/28/2008... - Page 23 100 °/sec limit. The sensor should then be rotated about the vertical and the Yaw output will respond accordingly. The test should then be repeated for the Roll axis. Watson Industries, Inc. DMS-EGP02 Rev A 03/28/2008...
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Page 24: Appendix C
All of the data words have a high sign bit, but the delimiter byte is an ASCII carriage return character, which has a low sign bit. The nominal interface settings are: 9600 Baud 8 Bit Data 1 Start Bit 1 Stop Bit No Parity No Handshake Watson Industries, Inc. DMS-EGP02 Rev A 03/28/2008...
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