Raven Envizio Pro, Руководство по установке и эксплуатации

Страница: 197 / 232

APPENDIX
B
Manual No. 016-0171-148 187
Appendix B
Testing Cables
Speed Sensor Extension Cable
Disconnect the extension cable from the speed sensor assembly cable. Hold the extension cable connector so
that the keyway is pointing in the 12 o’clock position as shown below.
FIGURE 1.
Speed Sensor Extension Cable Pin Diagram
Note:
If a radar type speed sensor is used, the voltage between the 10 o’clock and 2 o’clock positions
may read 12 VDC.
If a +5V DC voltage reading is not present, disconnect the flow meter cable and re-test the speed
sensor cable. If the voltage reads +5V DC when the flow meter cable is disconnected, test the flow
meter cable per Testing the Flow Meter/Encoder Cable section on page 188.
Testing the Speed Sensor Extension Cable
1.
Enter a speed cal of 9999 by touching the Speed button on the Product Control screen.
2.
Zero the odometer by entering a zero value in the Distance button.
3.
With a small jumper wire (or paper clip), short between the 10 o’clock and 6 o’clock sockets with a ‘short-no-
short’ motion. Each time contact is made, the distance total should increase by increments of 1 or more.
4.
If the distance total does not increase, remove the section of cable and repeat the test at the connector that
is the next closest to the node. If the distance total now increases with the short-no-short test, replace the
defective cable as required.
5.
If no pulses are registered, perform the above voltage checks.
6.
If all of the cables test ‘good’, replace the speed sensor.
Note:
After testing is complete, re-enter the correct speed cal before starting an application.
10 o’clock
Ground 2 o’clock
Power
Keyway
6 o’clock
Signal
5 VDC
5 VDC