a. Type upper case OPEN. You should now see a prompt. Type STAT. You should get a bunch of info
on the status of the CT-12K. If you don’t, double check your connection to the laptop.
b. There is no back space when talking to the CT-12K and everything is case sensitive and needs to
be upper case
c. Type PMOD OFF. You should see Automatic Mode On. Make sure in the status or be sure to type.
Then type CLOS. At that point you should soon see data flowing by 30 seconds. If you cycle
power on the CT-12K, then at the outset you should get a STATUS message rather than a data
message. See the Vaisala manual for how to interpret the messages and the info available at
http://inscc.utah.edu/~jyoung/ceilview/about/reading_raw.php.
C. Connecting the CT-12K for real-time data collection
We hope you are willing to keep one or more CT-12Ks reporting in real time as part of a national network of such
units. See http://inscc.utah.edu/~jyoung/ceilview/ for an example. We’ll be working on developing a database to
store the info from all available ceilometers.
1. We had to drill out and file the hole to the right of the power connectors to fit the extension cord into the
enclosure to attach to the 2-foot 3 socket plug.
2. You will need a crossover cable to configure the serial input to the Aexeon device.
http://en.wikipedia.org/wiki/Ethernet_crossover_cable
3. Aaxeon Technologies. 445 Capricorn Street. Brea, CA 92821. 714-671-9000. www.aaxeon.com. 1 PA-STX-
US Power Adapter for STE(W)-501/601 & LNX/IMC, (US Plug) ($15). 1 STE-501C. 1-Port RS-232/422/485 To
Ethernet Device Server ($95.00)
4. Use monitor.exe in the STE-501C subfolder on the CD-ROM to see the MAC address for this device
5. You need to tell whomever controls your network what the MAC address is so that your device will be
recognized on the network
6. The following is a somewhat painful process to do. As discussed in one line in the Aexeon manual, you
need to have your laptop and the Aexeon on the same subnet to make one change. The device will come
up with it having an ip address of 10.0.50.100 with gateway 10.0.0.254 and mask 255.255.0.0.
7. Go to the Network and Sharing Center control panel
8. Change Adapter Settings
9. Right click on the Local Area Network and select Properties
10. Select the Internet Protocol Version 4 and click on Properties
11. Change from Obtain IP address dynamically to “Use the following IP address”.
a. 10.0.50.101
b. 255.255.0.0
c. 10.0.0.254
12. Restart your laptop (you shouldn’t have to, but I do it because this has been a hassle to make
sure it works)
13. Run hyperterminal or another program and create a telnet session using the defaults including port 23
14. You should now see Fig 3.5 the main menu for the Aexeon device. If not, start checking the above steps.
15. You can now configure the serial input
a. Option 2. COM port. Change baud rate to 2400, data bit to 7, etc.
16. Exit out
17. Create a different telnet session using port 4660 (to program the device it is 23; 4660 is to access the
serial port)
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