Basic Weather Station BWS-200
16
9. Checking the Datalogger Clock (Date/Time) Setting
The CR200X Series Datalogger used in the Basic Weather Station contains the
program in non-volatile flash memory, and this will be retained even when the
main battery power supply is removed. The clock (date and time) settings are also
battery-backed, and will be retained when the datalogger is powered down.
Although your datalogger will have the date and time set before despatch, you
should check the current settings to ensure that they conform to your specific
requirements, as detailed below.
9.1 Using a Personal Computer Running PC200W
You can synchronise the datalogger clock with the computer clock by pressing the
‘Set Clock’ button on the PC200W main screen. PC200W will communicate with
the CR200X Series Datalogger and set its clock time to match your computer time.
Of course, if your computer time is incorrect, the datalogger time will also be
incorrect!
The datalogger clock can be offset from the computer clock in one hour
increments, up to plus or minus 24 hours. Use the up arrow or down arrow to
select an offset (or type in a new value over the old), then press ‘Set Now’ to
implement the change.
10. Running the Datalogger Program and Viewing
Measurements
Now that you have established communications and set the datalogger clock, you
will probably be anxious to view the measurements being obtained by your
weather station. Measurements can be viewed on the computer using PC200W.
Measurements from the sensors are stored as Publicly accessible variables on the
datalogger. These locations each have their own label (name) for easy
identification. See Appendix A for details of the programs supplied with your
Basic Weather Station.
10.1 The Datalogger Program
The datalogger program supplied with your Basic Weather Station has been
carefully designed to suit most applications. Program details are discussed further
in Appendix A.
This program includes information for the optional sensors. If you do not have the
optional sensors fitted please disregard the values returned. Details of which
values are generated from which sensor input can be found in Appendix A.
The datalogger can be re-programmed using ‘Short Cut’ to suit more specific
requirements. Before attempting to construct a new program, or modify the
existing program, please ensure that you are fully conversant with the operation of
the weather station, the datalogger and the PC200W software. Please consult
Appendix A for more information.
