Power and communication questions What communications options are available? Can I use RS-485 transmission? What is the maximum cable length for serial RS-232 transmission? Is it possible to read realtime data from my instrument? Is it possible to use external power with my instruments? What type of MCBH connectors are used? What types of batteries can I use? What happens to my data when the batteries run out of power? When happens to the clock or configuration settings if the battery is removed and replaced prior to deployment? Can I still connect to an instrument and download my data if the batteries are dead or removed? How fast is Wi-Fi download compared to cabled download?