Haefely 2830, User Manual, Page: 103 / 124

Software
95
measurement parameters” where the test parameters can be adapted fast such as the test
temperature, voltage, frequency etc.
If a own sequence is programmed it is recommended to copy a pre-installed sequence and to
adapt it (see chapter 9.6.3 Program a sequence).
Test Cell Calibration.seq
At the beginning of each pre-installed sequence are two comment lines with the name
of the actual sequence and an asterisk underline.
//Test Cell Calibration
//**********************
The next section is the variables declaration whose length varies depending on the
number and the kind of test are made. In all pre-installed sequences are variables
declared what have descriptive labelling such as DF (dissipation factor), RP (relative
permittivity) or RE (resistivity) etc. In this sample only one C Tan

measurement will be
made therefore no RE or DC prefix variables are used.
In the “IEC 60247 2004 Standard.seq” almost all variables are listed what are used in
the pre-installed sequences.
var
Cair: double;
DF: double;
ACVoltage: double;
ACStress: double;
ACFrequency: double;
ACTemp: double;
TempTol: double;
In more complex sequences like the
“IEC 60247 2004 Standard.seq” are procedures
defined before the keyword
begin
in the declaration section.
Direct after the keyword
begin
are the values assigned to the variables with the
measurement parameters. To each of this variables is a description written as
comment of the parameter range or the exact value which is specified in the according
standard.
begin
//Definition of measurement parameters
ACVoltage:=2000; //According to the used standard (max. 2000V with
//the oil test cell 2903)
ACFrequency:=50; //According to the used standard (40 Hz - 65 Hz
//possible with 2831)
ACTemp:=90; //According to the used standard (room temp - max
150°C
//with 2903)
TempTol:=0.5; //According to the used standard
Then the measurement sequence is following. In this case an AC measurement (C Tan

) is programmed without the relative permittivity (RP) because it is not needed for the
test cell calibration.
//AC measurement
DoHeat(ACTemp, TempTol);
AC_ApplyVoltage(ACVoltage, ACFrequency, 'Cell Calib');