Vaisala FD12P - Manual (Page 56)

User's Guide _______________________________________________________________________
56 ______________________________________________________ M210296en-A
To connect the maintenance terminal, do the following:
1. Disconnect the serial line screw connector or modem interfacing
cable (or the RS-485) from X18.
2. Plug the maintenance cable into X18.
3. Refer to Figure 17 on page 51 (RS-232).
Startup Testing
Before closing the cover of the electronics enclosure, a short startup
must be done as follows:
1. Connect a terminal via serial line to the sensor (See sections
Serial Transmission RS-232 on page 50 or Connecting the
Maintenance Terminal on page 55). Set the terminal baud rate to
300 and set the data frame to contain 7 data bits and 1 stop bit,
even parity.
2. Turn on the main switch at the power supply FDW13.
3. Check that the red LED on the CPU board is lit for a few
seconds, after which the green LED should start blinking. If not,
continue with troubleshooting.
4. After startup, the FD12P outputs:
VAISALA FD 12P V1.XX 19YY-MM-DD SN
(ID is also included, if configured.)
5. Wait for one minute and enter the command mode with the
OPEN command. Check with the STA command that no
hardware errors or warnings are detected.
6. Enter the automatic message mode by typing CLOSE and check
that a message appears every 15 seconds in the display.
Initial Settings
The FD12P Weather Sensor is typically interfaced to a host computer
or a data logger in an automatic weather observing system. After the
physical connection has been made, the communication details can be
configured in the FD12P software. Suitable communication settings
depend on the implementation of the whole system.
By default the sensor transmits a new ASCII data message through the
serial line every 15 seconds. The user can change the interval and