How do I calculate the mean and standard deviation of my data?.How do I submit data to the WDCA archive?.How do I review data before submitting to the WDCA archive?.Do you have a tutorial about extracting data from the db system?.Is there a simple way to extract edited, averaged data from the db system?.
How do I download data from the virtual machine to my personal computer?.How do I duplicate tabs/graphs/variables for a station or between stations?.How do I change the axis range on plots in cpx2?.Should I invalidate the data if the stack flow rate is not 850 VLPM?.How do I invalidate data for just one size cut?.How does CPD2 contamination flagging work?.How can I fetch the most recent data recorded by the 'cpd' program from my LiveCPD system?.How do I configure LiveCPD to allow login from a remote system without a password?.How do I set up the networking for LiveCPD?.What should I do when I see the message: Clock is not synchronized to an NTP server in the daily email message?.How do I set the NTP server (so the laptop has the correct time)?.How do I set the computer clock to UTC?.What should I do if I think my CPC is counting low?.Should I expect number concentration to co-vary with light scattering and/or light absorption?.How do I check that the GPS is working and acting as an NTP server?.How do I know if I need a new battery for the system laptop?.How do I change the BIOS settings on the system laptop and what should they be?.What should the pumpbox magnehelic be set at to achieve 850 vlpm stack flow?.How can I tell if the stack heater is working?.Why is the impactor flow rate set at 30 lpm and the screen on the laptop says something different?.What are my options if the neph backscatter motor appears to be failing?.What can cause a negative span check error?.What does a negative span check error mean?.How do I return the neph lamp to 75W power after a lamp change?.What do neph error messages in the daily email messages mean?.The span check error is slowly getting worse – why? what can I do?.How do I interpret the span check results in the nk_ file?.At what temperature should I run the station air conditioner?.To suggest new additions to this FAQ page, please email Betsy Andrews.įor questions relating to data processing and the 'DB' system, please To return to the list of questions, click "Return to Top" at the bottom of the answer. To view the answer to a question, simply click on the question. Below are some frequently asked questions regarding Aerosol Group operations.