Haefely 2830, User Manual, Page: 60 / 124

52 Software
In the field “Quantity” you define how many
liquid test cells you will use (the maximum are
10 liquid test cells). For all liquid test cells you
have to set the “File Name” (either you make a
new file or you open an existing file, see 9.2
File
Manager
), the “Serial No.”, the
capacitance of the empty test cell (C Air), the
temperature of the empty test cell, and the
calibration date.
You can use the sequence “Test Cell
Calibration” for an automatic determination of
the C Air , the Temperature and the date. The
heat up will also be done automatically.
The “C
air
” is used for the calculation of relative
permittivity and the DC resistivity.
The plate distance in cm (generally the
thickness of the solid sample) is used for the
calculation of relative permittivity and the DC
resistivity.
The thickness of the solid sample has to be
measured manually.