User manual SESD 216 / SESD 230
281606
page 9 of 20
5.4
Mode CON / AIR
With this key the test mode can be changed between contact discharge and air discharge. While pressing
the key the display shows in the third line the information "CON DISCHARGE" or "AIR DISCHARGE".
Simultaneously the admissible voltage ranges are changed - see point [5.2].
Make sure that the right test tips are connected to the generator - air discharge "round" and contact dis-
charge "sharp".
5.4.1
Special function - contact control at CON
If the test mode is set to "CON" the triggering can only be detected if the serial resistance in the test cir-
cuit is smaller than 4 M
Ω
. In other cases the display shows "NO CONTACT".
At the level < 1,0 kV (SESD 216) or < 1,5 kV (SESD 230) the display doesn’t show usually "NO CON-
TACT". Notice, in this case a discharge will be done.
Switch OFF contact control
If you don’t want the special function “CM (Contact Mode)”, you can “switch OFF” and “switch ON”
the function as below:
Switch OFF the ESD generator. Now press and hold the buttons [Perm], [Polarity] and [Counter]
and switch on the generator by pressing the button [ON/OFF].
The bottom line shows on the left side CM = ON. With the button Con/Air [3] you can select be-
tween ON and OF. With the button „Perm“ [4] = „Escape“ you leave this menu and goes to the
normal mode
5.4.2
Special function – displaying of the real discharge at AIR
In the test mode “AIR” and “Single” the “real discharge voltage” we can show in the display.
After the discharge and hold-on the trigger button [9] the voltage in the display changes from the adjusted
voltage to the real discharge voltage. This voltage is shown as sparkled information.
Example:
Adjusted voltage: 12.0 kV -> after the discharge the value 9.7 kV is flashing.
That means the value 9.7 kV is the different value between the adjusted voltage (12.0 kV) and the residu-
al voltage of the discharge capacitor (2.3 kV)
5.5
Repetition frequency
By pressing the button „Rep. Freq.“ [7] a number of times the following repetition frequencies (shown on
the right hand in the third line of the display) can be chosen.
Air discharge:
SINGLE or REP (single pulse or repeated).
Contact discharge:
SINGLE, 0,1 Hz, 0,2 Hz, 1 Hz, 2 Hz, 5 Hz, 10 Hz or 20 Hz.
