Campbell PC208W Manual de usuario descargar pdf (Pagina 17)

MicroMet Manual Pg. 14

Checking MicroMet Communications Performance

1. Connect the MicroMet cable between the PC and J3 of the MicroMet unit.

2. Type the command Verbose 5 followed by the ENTER key. MicroMet should

respond ‘Verbosity 5’. This tells MicroMet to display level five warnings and

advisories.

3. Set the MicroMet time with the time command. The time command uses the form:

time YY MM DD HHMM. MicroMet will respond with the correct time.

4. With verbosity set to level five (verbose 5), MicroMet will print an advisory each time

a new data message is received from the CR10X (usually on the hour), and will print

an advisory each time a message is delivered to the Master Station.

5. Use the Stat command to display MicroMet performance statistics. Stats are

compiled for the current day as well as the current hour. Transmit to

Acknowledgement ratio is an important performance statistic. This ratio should not

normally exceed 10 to 1, and should usually be in the range of 2 or 3 to 1 over a

long period of time. (See stat command explanation, pg 8, for a description of

information displayed).

Warning: Sometimes the PC can interfere with the radio receiver. When this is

happening, the SP light will flash more frequently, and the SP to SYNC ratio will be low.

It is generally a good idea to unplug the cable at the MicroMet J3 connector between

uses. Plug in, check status, then unplug.

Since I am impatient, and I don’t like to wait for the data logger to generate messages, I

usually use canmsg to generate a few messages very quickly. To do this:

1. Set the MicroMet time. Time YY MM DD HHMM

2. Turn on canned message mode. Canmsg 8. The parameters here should match

the number of sensors expected from the CR10X.

3. Observe the messages being generated and take stats occasionally. Canmsg will

post a new message every minute.

4. Don’t forget to turn the canned message mode off when you are through testing!

Canmsg off.

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Campbell PC208W Manual de usuario Pagina 17