Delta-T HH2, User Manual

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Memory use Moisture Meter User Manual 4.0
Memory use
Stored readings
To see the number of readings taken and memory used, select Options , Status,
Resources.
The number of readings you can save depends on what device and what menu
options you select and how often you change them.
How Many Readings Can I Take?
The number of readings depends on how much information you change each time
you take a reading, on which device you are using, and on how many different
reading units you elect to display and save.
For maximum and minimum numbers of readings for various configuration changes
and sensors see "Maximum Number of Readings" on page 83.
Optimising Memory
More readings can be saved if you if you only select one, not two, sets of engineering
units under Options, Display .
You may change Sample, in the Option, Data for each reading without affecting the
total number of readings. (The Sample number automatically increases by one
otherwise anyway).
To get the most readings try to group all your options together.
Do not worry too much about memory use, the actual memory overhead of changing
a single option is quite small, typically 0.06%.
No additional penalty is incurred if you change your mind before pressing the Store
button. Changing a configuration only affects memory when a reading is stored. If
you change the configuration for soil 10 times but only store the reading after those
10 changes, only the last change is stored so memory is only used once.
When you change any option
other than the Data options -Device ID, Plot ID or
Sample, then extra lines are inserted in the data record saved to the PC. Next time
you press Store, the row by row sequence of readings eventually sent to your PC is
disrupted by the insertion of 9 rows of header information summarising all the options
(plus 2 blank rows) . This can be seen in the example output file shown on page 72
in which the units (Display option) were changed after the fourth reading. If you do
this too often it could make life more complicated later when you come to interpret the
data. It also consumes memory.