Acumen DataBridge SDR2-CF User Manual download pdf

Ceilometer Installation at U/U

The following is not the only way to proceed, but it works. If you decide to try other approaches, let us know how

it goes. We have installed units either with Ethernet connectivity for real-time display (preferred and less

expensive) and remote on-site storage (works fine but our approach is pricy). For background info, see Vaisala

manual on the CT-12K posted at http://inscc.utah.edu/~jyoung/ceilview/about/ct12k.pdf , but NWS manual that

we have in paper copy even better (see if they have one at your nearby WFO).

For permanent install, you could use the CT-12K mounting stand. We’ve found putting on a couple of cinder blocks

is fine especially for building roofs.

A. Connecting power cords

1. 2 power cords with 3 18 gauge wires (one for power to ceilometer and other for hood. If you are planning

on communicating via Ethernet, then these should be order 12-18 inches. If for testing/on-site storage,

they can be of length 3 feet or longer.

2. 2 foot three prong heavy duty 18 gauge extension cord + extension cord of length to reach power supply

3. You’ll need a short stubby straight screwdriver to fit in the tight space

4. Attach u-shaped spade fittings to both power cords

5. You’ll have the ground lines for both attached to the central connector with power connectors to CT-12K

on left and hood connectors on right

B. Communicating with the CT-12K by laptop to test and download data.

You will need:

1. basic serial telnet type software. Because of some history with using it when it was free, we purchased

Hyperterminal Private Edition (~$50), but you can use putty or other options.

2. USB to serial cable. These have been a pain for us over the last couple of years, but have found the best

ones to be: http://www.rs232-converters.com/single_usb_to_rs232_converter.htm (~$25)

3. You need to be familiar with looking on a windows laptop in the device manager to know which COMM

port the USB to serial cable is connected

Steps:

1. Create a telnet connection at 2400 baud, parity none, 7 bit, 1 stop bit and leave everything else as

defaults

2. Facing the power strip and to the left of the power strip, disconnect the 6-9 inch cord with a 9 pin serial

connector from the RX/TX ASOS connector.

3. Connect the USB to serial cable to the ceilometer serial interface. You may need to use gender bender

serial connectors to make the connection.

4. Don’t look down into the laser, although it is eye safe. Turn on the ceilometer using the CB1 toggle on the

left. You should see a blinking green light in the upper left of the unit.

5. The CB2 toggle on the right is for the blower/heater. You will get an error regarding the box temperature

if you don’t have the blower/heater plugged in, but you don’t need it connected for testing.

6. If everything is right, you should just start seeing some hexadecimal numbers scrolling by every 15-30

seconds. If you don’t:

1 2 3 4

Summary of Contents

Page 1

Ceilometer Installation at U/U The following is not the only way to proceed, but it works. If you decide to try other approaches, let us know how it g

Page 2

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 che

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18. You should be able to see data flowing. And do an OPEN command, STA etc. 19. If everything is working, then you have two options for the follow

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E. Using the maintenance port for comms and soldering instructions 1. Initially we used for all applications the maintenance port located underneath

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