WATSON INDUSTRIES DMS-SGP02 Owner's Manual
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Contents
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Watson Industries, Inc. DMS-SGP02 Rev K 03/22/201824Appendix BSensor Test InstructionsTests within this section have been designed to allow the user to verify the correct operation of thesensor without the use of elaborate test equipment other than a means of accurately observing theoutputs. The “Hyperterminal” program provides a suitable means of observing the outputs.B.1 Parameter Exercise TestAfter successful initialization, move the sensor in all three axes using both linear and angularmotion, making certain each of the measurement parameters responds to the motion.B.2 Angular Displacement Scale Factor TestsAfter successful initialization, place the sensor on a level surface and observe the pitch and rolldisplacement signals. Place the sensor on a pivot and incline the sensor by a small angle of 6 to 10degrees in the pitch. A suitable pivot is a 10mm square bar attached to the sensor base plate withadhesive tape. Give the "Reference" command. The signals from the simulated pendulums will beoutput instead of the normal angular displacement signals. Careful note should be taken of theangles indicated in the reference mode. The sensor should then be tipped on the pivot into theother stable position and the angle again noted.The procedure of tipping the sensor should be repeated in “Inertial Mode”. The angles obtainedshould agree with those noted in “Reference Mode”.Repeat this procedure for the Roll axis. The same pivot may be used, but some care will be neededto avoid exceeding the 100 °/second limit. A more appropriate size of bar would be 5mm square.B.3 Accelerometer Scale TestAfter successful initialization, place the sensor on a level surface and monitor the accelerationoutputs. Observe that the X and Y outputs read near zero while the Z-axis will read -1G within theaccuracy of the sensor.Set the sensor at a 45° angle to the horizontal in Pitch only. The value of X and Z accelerationshould read 0.71G, within the accuracy of the sensor, while the Y acceleration should remain at thelevel value. The values of Forward, Lateral and Vertical Acceleration should remain at the valueswhen level.Repeat the test for the roll axis of the sensor. Under this test, Y and Z acceleration will read 0.71Gand the X acceleration will retain its value at level. |
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