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Summary of Contents for WATSON INDUSTRIES DMS-E604
- Page 1 DYNAMIC MEASUREMENT SYSTEM OWNER'S MANUAL PART NUMBER: DMS-E604 WATSON INDUSTRIES, INC. 3035 MELBY STREET EAU CLAIRE, WI 54703 Phone: (715) 839-0628 Fax: (715) 839-8248 email: support@watson-gyro.com Watson Industries, Inc. DMS-E604 Rev L 11/01/2017...
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Page 2: Table Of Contents
Appendix D ......................... 22 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
Product Description Watson Industries DMS uses solid-state gyros and silicon accelerometers. Interface to the microprocessor is done through a 16-bit A/D converter. The solid state vibrating structure angular rate gyros used in this system provide extremely high reliability, low power consumption, shock resistance and low cost. -
Page 4: Environment
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 5: Special Operation Modes
Using this mode, the user can retrieve the EEPROM map, baud rates, output formats, and many other operational settings of this sensor. Having access to this information makes the Control Mode useful in assisting the factory to remotely troubleshoot the certain operational Watson Industries, Inc. DMS-E604 Rev L 11/01/2017... -
Page 6: Interface
Example: I +002.5 -05.0 273.4 -00.4 +01.2 +10.4 <CR> ↑ ↑ ↑ ↑ ↑ ↑ Bank elev. Head. X axis Y axis Z axis angle angle angle rate rate rate Watson Industries, Inc. DMS-E604 Rev L 11/01/2017... -
Page 7: Rs-232 Input Commands
These commands are available to the user (others are used at the factory for alignment and calibration). An “R” or “r” will set the outputs (analog and serial) to their Reference Command modes. This will also disable the logic input Reference Command, Free Mode Command and Watson Industries, Inc. DMS-E604 Rev L 11/01/2017... - Page 8 (On to Off; Off to On). This change is made non-volatile in the unit on EEPROM by keying in the quote (“) character. Command mode is required for access to this command. Watson Industries, Inc. DMS-E604 Rev L 11/01/2017...
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Page 9: Analog Outputs
0°/s 10°/s/V 100/s Pitch Rate (Y Axis) ±10V 0°/s 10°/s/V 100/s Yaw Rate (Z Axis) ±10V 0°/s 10°/s/V X Acceleration 10g ±10V 1g/V 10g Y Acceleration ±10V 1g/V 10g Z Acceleration ±10V 1g/V Watson Industries, Inc. DMS-E604 Rev L 11/01/2017... -
Page 10: Analog Inputs
Velocity Inhibit – This is used to isolate the DMS from velocity inputs when velocity signals are noisy or unnecessary. NOTE: The analog digital inputs are all disabled if any equivalent serial command is sent via RS- 232. This is to prevent hardware/software conflicts. Watson Industries, Inc. DMS-E604 Rev L 11/01/2017... -
Page 11: Specifications
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. This product may be subject to export restrictions. Please consult the factory. Watson Industries, Inc. DMS-E604 Rev L 11/01/2017... -
Page 12: Connections / Dimensions
INTERNATIONALLY PATENTED AND PATENTS PENDING Shorted to pin 4 Shorted to pin 8 Shorted to pin 7 No Connection ** The user receives on this line. DMS-E604 CAUTION DELICATE INSTRUMENT HANDLE WITH CARE Figure 1 Watson Industries, Inc. DMS-E604 Rev L 11/01/2017... - Page 13 Figure 2 DMS-E604 Watson Industries, Inc. DMS-E604 Rev L 11/01/2017...
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Page 14: Warning
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 15: Customer Service
Customer Service All repairs, calibrations and upgrades are performed at the factory. Before returning any product, please contact Watson Industries to obtain a Returned Material Authorization number (RMA). Return Address & Contact Information Watson Industries, Inc. 3035 Melby Street Eau Claire, WI 54703... - Page 16 If set, Analog Switches disabled The Status Bits contain the following information: Description (If Set) Bank Error Flag Elevation Error Flag Heading Error Flag System Error Flag Velocity Error Flag Ready Flag Checksum Error Flag Watson Industries, Inc. DMS-E604 Rev L 11/01/2017...
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Page 17: Activating Command Mode (Double Spacebar Mode)
1) To adjust the system time constants, type ‘1’ at the main menu. These settings can dramatically change the operation of the sensor and we recommend that any changes be made with the direction of Watson Industries engineering. Appendix B.2 Set Output Channels 1) To change the output channels, type ‘2’... -
Page 18: Appendix B.3 List Output Channels
2) Change the baud rate to a new setting. To change to 38,400 Baud, type ‘1’. To change to 19,200 Baud, type ‘2’. To change to 9,600 Baud, type ‘3’. To change to 4,800 Baud, type ‘4’. Watson Industries, Inc. DMS-E604 Rev L 11/01/2017... - Page 19 Note: The baud rate of the software that is communicating to the sensor will need to be changed to match the new setting. 3) Press the space bar to resume data transmission. The factory settings for serial communications are 9.6K baud with 8 bits and one stop bit, no parity. Watson Industries, Inc. DMS-E604 Rev L 11/01/2017...
- Page 20 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-E604 Rev L 11/01/2017...
- Page 21 100 deg/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-E604 Rev L 11/01/2017...
- Page 22 Shift lower byte left once (to remove 1 bit space between bytes): Bank Elevation Heading X Rate Y Rate Z Rate 0x05 0x7E 0x70 0x03 0x7B 0x11 0x54 0x38 0x00 0x32 0x32 0x98 Watson Industries, Inc. DMS-E604 Rev L 11/01/2017...
- Page 23 LSB as a 16 bit word. This word is then shifted left to shift out the 7th bit (always set to 1). What remains is a signed fractional word with a resolution of 13 bits plus a sign bit. Watson Industries, Inc. DMS-E604 Rev L 11/01/2017...
- Page 24 For Angular Rates: Scale factor is: (200 ˚/sec) / 32768 counts X Accel Y Accel Z Accel X angular rate Y angular rate Z angular rate 0.0000g -0.2808g -0.9595g 9.985 ˚/sec -15.015 ˚/sec 54.980 ˚/sec Watson Industries, Inc. DMS-E604 Rev L 11/01/2017...
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