Campbell SDMS40, Product Manual

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when you move the sensor. This is done by issuing a calibration request command (SDI-12 aXA!
or RS-232
@ac
). When using the RS-232 command, the sensor will ask to confirm the request.
Enter y to proceed.
10.2.2 Manual calibration
Manual calibration is only required if automatic calibration fails. After installation, enter the
height of the sensor and run a ground level resetting procedure.
Entering the height can be done by sending the appropriate command (SDI-12
aXHxxxx!
or
RS-232 @h xxxx , where xxxx is the sensor height). When using the RS-232 command, the
sensor will ask to confirm the height. Enter y to proceed.
After entering the sensor height, initiate a ground level reset (SDI-12
aXG!
or RS-232
@g
). When
using the RS-232 command, the sensor will ask to confirm the request. Enter y to proceed.
10.3 Updating operating system
To update the sensor operating system, download the operating system available from:
www.campbellsci.com/sdms40 . A terminal emulator software such as PuTTY Portable is required
to do this update. PuTTY Portable is available at no charge from
https://portableapps.com/apps/internet/putty_portable .
Table 10-1: Updating operating system procedure
Step Procedure
1
Wire the SDMS40 sensor to a DB9 female terminal block (see Table 10-2 (p.
21)).
2
Connect the DB9 female to your computer RS-232 port using a standard serial
cable or to a USB port using a serial-to-USB adapter.
3
Extract the operating system .zip file (sdms-firmware-update-utility.zip) down-
loaded from the website and open PuTTYPortable.exe.
SDMS40 Multipoint Scanning Snowfall Sensor 16