Haefely 2830, User Manual, Page: 77 / 124

Software
69
Set Voltage
In this text field the DC test voltage and the polarity
can be set.
Positive polarity:
The “U” socket on the front panel is
connected to the DC HV and the “a” socket is
connected to ground.
Negative polarity: The “U” socket on the front panel is
connected to ground and the “a” socket is connected
to the DC HV.
If the option “Touch screen” is set in the sub tab sheet
Options (see 9.3.4 Options) a voltage input dialog will
be opened. The info text on the right side will be
displayed where the range of the settable voltage is
specified.
If the option “external” is selected then no voltage
input dialog will be opened. The voltage can be typed
directly into the text field.
If a positive voltage higher than 1.8 kV (with the
accuracy of +10% + 20 V @ 1.8 kV = max. 2 kV) is
set then a warning message will pop up because the
maximal positive voltage for the liquid and solid Tettex
test cells is 2 kV. The maximal negative voltage is
– 1
kV.
If a voltage out of range is set this info message will
pop up.
Only the following three states of the Start/Stop Test button are described here. The other buttons
are descried in the chapter 9.1.4 Basic Buttons.
Disabled Test
When the Start Test Button is disabled then no heater or test cell is selected,
the emergency button is pressed, one of the interlock connectors are not
connected, another measurement is running or the DC Resistivity measuring
unit is not ready.
Start Test
This button state is used to start the measurement.