Delta-T HH2, User Manual

Page: 83 / 124

76

Linearisation Tables Format Moisture Meter User Manual 4.0
Linearisation Tables Format
.LIN File Format
The HH2 linearisation table for SM200, ML1, ML2, PR1 or PR2 devices may be
changed by loading a ".lin" format file from the PC using HH2Read. This facility is
provided to enable Delta-T to provide updates to linearisation tables for these
devices.
These tables contain pairs of mV values and square root of the soil permittivity
values.
These are text files which you can view with any text editor, such as Notepad under
Windows.
The file must be formatted as follows:
<Label><CR><LF>
<Number of Data Points n><CR><LF>
<mV Value 1>
,
<Converted Value 1><CR><LF>
" " 2
,
" " 2 " "
" " " " " "
" " " " " "
<mV Value n>
,
<Converted Value n><CR><LF>
Each line must be terminated with the ASCII codes for Carriage Return CR and Line
Feed LF.
<Label> The first line of the file contains exactly 10 characters, including white
space, describing the table - such as its name and version information - to be stored
in the HH2.
<Number of Data Points n> The next line contains the number of values in the
linearisation table. This must be a 2 digit integer (zero padded) to indicate the number
of data point pairs in the table. It can have the value 02 to 20.
<mV Value n>,<Converted Value n> The remaining lines contain pairs of
linearisation table values. There can be between 2 and 20 pairs of data points. A
comma separates the two values. If there are less than 20 data point pairs then the
remaining rows should be padded with zeros as shown in the example below.
<mV Value n> This represents the mV output signal from the sensor. The mV
value is an integer value between 0 and 2000. The values are zero padded to ensure
that they are always of the form nnnn e.g. 0013.
<Converted Value n> This represents the square root of the soil permittivity. The
converted value must be a number between 0 and 999.999, to three decimal places.