B&G Zeus 12 - Manual (Page 61)

60
Missing Data
If instrument data is unavailable the time plot will turn into a dashed line and flatten out
at the point data was lost.
When data becomes available again a dashed line will join up the two points showing an
average trend line where the missing data is.
Barometric Pressure data is stored on the unit even if power is switched off. This enables
the unit to display data from a previous day. Data is not recorded whilst the unit is off.