The data stored for each tagged point 
includes: 
-  Time when the point was tagged. 
-  Serial number of the probe that 
was used (useful for identifying 
the point) 
-  Measured value of each 
parameter. 
Press the 
 button to delete the 
point that is currently shown. To delete 
all points in memory, hold down the 
 
 
HM40 can store up to 40 tagged points. If a new 
tagged point is stored when the memory is full, the 
oldest tagged point is silently deleted to make 
room for the new point. 
Graph Duration 
 
In the 
 screen, you 
can select the timescale of the 
Graph view. The shortest selectable 
timescale is 1.5 minutes, the longest 
32 hours. 
You can also select 
, 
which means that the timescale will 
automatically adjust to show all of 
the measurement data in memory, 
up to the maximum of 32 h.