Page 6
Operating Manual Isotest II T / II RT
1.3.1
Setting the Test High Voltage
!
This section applies only to II RT(-F) testers with variable
!
test voltage.
The required test voltage level is set via a rotary scale
Ž • •
(see figure). The
display on the rotary scale is given in millimetres (corresponding to the distance
between the spheres in the sphere gap). In order to set a given
voltage
(in kV), the
corresponding
distance
(S in mm) must be read off from the chart
Œ
alongside the
rotary knob.
Caution!
The scale is different on the II RT-F.
Subsequently release the lock of the rotary knob by moving lever
•
in counter-
clockwise direction.
Setting is now carried out with the black inner part of rotary knob
Ž
. The numeric
value before the comma (decimal point) must appear in the window
•
of the rotary
knob, the numeric value after the comma must be set with the inner ring
•
(linked to
the black knob).
After setting, lock the rotary knob again by moving lever
•
in clockwise direction.
If a voltage value is to be set which is not listed in the chart on the tester, the corres-
ponding setting can be determined from the tables in the Annex (see page 20).
!
CAUTION!
!
The setting range of the rotary scale is limited mechanically
below the value 0.0 and above the value 13.55.
Forcible turning beyond these values will result in
destruction of the rotary scale.
