Schloder SESD 216, Operation Manual

Page: 10 / 20

User manual SESD 216 / SESD 230 281606 page 10 of 20
5.6 Counter Mode
5.6.1 Standard „Counter – Mode“
After pressing the button „Counter“ [6] the display shows in the first and second line
"COUNTER SET“
C: XXXX ".
The last selected value appears, e.g. C: 140. Using the potentiometer [5] the values can be changed
from C 00 up to C 9999 are available. After pressing the button „Counter“ [6] again the displayed value is
fixed in the pre-select counter.
For example the second line shows
C: 140/ 140
Now you can start the test by pressing the trigger button [12]. Depending of the adjusted repetition fre-
quency the counter counts down the first value of the displayed 140/ 140.
The second value will never change. It shows always the nominal value of the pulses. When the counter
counts to zero "00", no discharge is possible. After releasing the trigger button the display show again the
originally value, e.g.
C: 140/ 140.
A further test with the same condition is possible by pressing the trigger button again. The test voltage
can change every time.
To change the counter adjustment, press the button „Counter“ [6] to go into the „Counter Set-Program“.
Now you can change the values.
For further usage of the generator, the pre-select counter must either be programmed again or cleared.
By pressing and holding button [6] for > 1 sec the pre-select counter will be cleared after the key is re-
leased.
5.6.2 Polarity changing during the „Counter-Mode“
In the standard mode the ESD pulse discharge positive „+“ or negative „-“. The display can show:
+ 6,5 kV
C:
140/ 140
By using the counter mode it is possible to change the polarity after the half of the nominal discharges.
Activate the „Counter“ mode with button [6]. On the right side in the second line the last selection is
shown. Push the button „Polarity“ [2]. Behind the letter “C” the s - or - +. Was the polarity before
adjust to „positive“, you see +-. Was the polarity before adjust to „negative“, you see -+. By pressing the
button „Counter“ [6] the display show:
+ 6,5 kV oder - 6,5 kV
C: + - 140/ 140 C: - + 140/ 140
With this adjustment and pressing the trigger button the counter counts down and change the polarity
after the half of the values (at 70 at our example)