Watson Industries, Inc
AHRS-S305 Rev J 03/22/2018
18
Appendix B
Activating Command Mode (Double Spacebar Mode)
1) Connect the unit to a DC power source that is off.
2) The viewing computer needs a valid bi-directional RS-232 serial port. Connect the serial
port of the Watson sensor to the computer’s serial port.
3) Open a terminal program (such as HyperTerminal) to interface with the unit. The default
baud rate of the unit is 9600 baud. Make sure the computer’s serial port is open.
4) Power-on the unit. A startup message will be transmitted by the unit and will appear in
the terminal window unless it has been suppressed (See RS-232 Input Commands above).
5) During initialization, hit the space bar twice within close succession.
Note: The sensor initialization time begins after the startup message is transmitted.
Typically, this time period lasts 5 seconds, but could be as long as 127 seconds
depending on your sensor.
6) Wait until after initialization is finished. At this point, command mode will be activated
and the unit will accept keyboard commands.
Note: Most Watson sensors have initialization times that are shorter than 30 seconds. Any
extra keystrokes (other than two spacebars) sent during initialization will deactivate
command mode.
**It can often take a few attempts to get the hang of step 5. Repeat steps 4-6 until successful.
Determining Output Channels
1) Activate Command Mode (See above).
2) To determine which channel present, first type '&'.
This will bring up the main menu:
3)
Typing in '3' will show which channels are currently active.
Setting Output Channels
1) Activate Command Mode (See above).
2) To change which channels are output type '&' (this will bring up the main menu again)
3) Now type '2' to set up channels.
The following message will appear:
TO SET FOR OUTPUT FOR ANY OF THE FOLLOWING DATA ITEMS, PRESS Y
TO AVOID ANY OF THE FOLLOWING DATA ITEMS, PRESS N
TO QUIT AND DISREGARD ANY OTHER DATA, PRESS Q
*** DO YOU WANT TO PROCEED? (Y/N/Q)
TYPE IN THE NUMBER OF YOUR SELECTION (OR 'Q' TO QUIT):
1 = ADJUST TIME CONSTANTS
2 = SET OUTPUT CHANNELS
3 = LIST CURRENT OUTPUT CHANNEL SELECTION
4 = SET NEW BAUD RATE
