This command tells the WLTS to take a measurement. However, the measurement is not returned after this command. Instead, the time and number of measurements that can be expected will be replied. For example: 0M!/00102<CR><LF> where the first "0" is the WLTS address, the next three digits "010" represent the time in seconds it will take the WLTS to take the readings, and the final "2" indicates how many readings will be returned. The Solinst WLTS will return a temperature and level measurement which are always ready to be read after the specified time, after that the SDI-12 recorder can issue the Send Data command 0D0! to retrieve the measurement data. Other start measurement commands such as aM1 to aM9 are reserved for future use.
