Schloder SESD 216 User manual

OPERATION MANUAL
ESD - GENERATORS
SESD 216
SESD 230

User manual SESD 216 / SESD 230 281606 page 2 of 20
OPERATION MANUAL
ELECTRO STATIC DISCHARGE
GENERATORS
SESD 216 16,5 kV
SESD 230 30,0 kV
Warning:
This unit generates high voltages and is inherently dangerous. The local, national and all applicable safe-
ty regulations must be obeyed for operation of this unit. The device must only be used by experienced
electric technicians (see VDE 0140) respectively through qualified operating personal (electrotechnical
instructed person). People using cardiac pacemakers should be excluded from the test area.
Before using the generator please read this manual
and also the warnings to the safety points under item 1
This generator contains a Li-Ionen battery.
Please note also Section 5.13.1 “Note for internal battery:”

User manual SESD 216 / SESD 230 281606 page 3 of 20
Contents
1SAFETY REGULATIONS...................................................................................................................4
1.1 WARNINGS............................................................................................................................................4
1.2 REDUCTION OF SAFETY..........................................................................................................................4
2INTRODUCTION.................................................................................................................................5
3ESD - DEFINITION .............................................................................................................................5
4UNIT FUNCTION ................................................................................................................................6
4.1 FRONT PANEL FUNCTION........................................................................................................................6
4.2 CASE....................................................................................................................................................7
5DESCRIPTION OF FUNCTION..........................................................................................................8
5.1 ON /OFF -SWITCH ...............................................................................................................................8
5.2 OUTPUT VOLTAGE ADJUST......................................................................................................................8
5.3 POLARITY..............................................................................................................................................8
5.4 MODE CON /AIR..................................................................................................................................9
5.4.1 Special function - contact control at CON.................................................................................................. 9
5.4.2 Special function – displaying of the real discharge at AIR......................................................................... 9
5.5 REPETITION FREQUENCY........................................................................................................................9
5.6 COUNTER MODE..................................................................................................................................10
5.6.1 Standard „Counter – Mode“..................................................................................................................... 10
5.6.2 Polarity changing during the „Counter-Mode“.......................................................................................... 10
5.7 CONTINUOUS DISCHARGE.....................................................................................................................11
5.8 LCD -DISPLAY....................................................................................................................................11
5.9 TRIGGER BUTTON ................................................................................................................................12
5.10 DISCHARGE RETURN CABLE..................................................................................................................12
5.11 DISCHARGE ELECTRODES CON /AIR...................................................................................................12
5.12 POWER SUPPLY...................................................................................................................................12
5.13 DISPLAY THE ACCUMULATOR CHARGE...................................................................................................13
5.13.1 Note for internal battery: .......................................................................................................................... 13
5.14 CONNECTOR FOR A TRIPOD..................................................................................................................13
5.15 ADJUST THE CONTRAST OF THE LCD -DISPLAYS ..................................................................................13
5.16 SERIAL NUMBER ..................................................................................................................................13
6RECALL – TEST LEVEL 1 - 4..........................................................................................................14
6.1 ACTIVATION OF THE FUNCTION .............................................................................................................14
6.2 STANDARD TEST IN COUNTER MODE.....................................................................................................14
7SETUP - FUNCTION.........................................................................................................................15
7.1 ACTIVATION OF THE FUNCTION .............................................................................................................15
7.2 AUTOMATIC TEST.................................................................................................................................15
7.3 PROGRAMMING THE AUTOMATIC TESTS.................................................................................................16
7.3.1 Input parameter ....................................................................................................................................... 16
7.3.2 Store the input ......................................................................................................................................... 17
7.3.3 Clear entry............................................................................................................................................... 17
8CALIBRATION..................................................................................................................................18
8.1 TEST EQUIPMENT FOR THE CALIBRATION PROCEDURE............................................................................18
8.2 PROOF OF THE QUALITY OF THE ESD-PULSE.........................................................................................18
9TEST SETUP ....................................................................................................................................18
10 TECHNICAL DATA...........................................................................................................................19
10.1 GENERATOR........................................................................................................................................19
10.2 AIR -/CONTACT DISCHARGE................................................................................................................19
10.3 POWER SUPPLY...................................................................................................................................19
11 SCOPE OF DELIVERY.....................................................................................................................19
12 ADDITIONAL....................................................................................................................................20
13 BLOCK SCHEMATIC DIAGRAM.....................................................................................................20

User manual SESD 216 / SESD 230 281606 page 4 of 20
1 Safety regulations
1.1 Warnings
The test generators SESD 216 and SESD 230 creates high voltage up to 16.500 Volts and 30.000 Volts.
The energy of these high voltages is limited, but injury might be incurred if the probe tip is touched.
The handling of the generator is only allowed to experienced and instructed persons according to
DIN 570105 / VDE 0105 part 1. Persons with a cardiac pacemaker are not allowed to handle this
unit.
The use of the ESD generator assumes, like all measurement tasks and verifications, that the local and
branch specific directions are considered. Precautions should be taken that any part that carries high
voltage and can be touched should be shielded. This is important with both the ESD Generator and the
object under test.
While using the ESD generators it must be sure that the ground / earth connection is fastened at
the generators ground and connected to earth potential.
It is not allowed to use the tripod connector for grounding!
The interference generator SESD 216 and SESD 230 is according to its specifications designed
only for laboratory use in the industrial surrounding (tests in a Faraday’s cage).
1.2 Reduction of safety
If the unit has visible damage so that a save operation is no longer possible, it has to be set out of opera-
tion. It has to be ensured against unauthorized usage. The unit has to be sending immediately to the
manufacture / dealer with a description of the damage!
We warn against untrained staff opening the unit. There is high voltage inside EVEN WHEN
SWITCHED OFF. Your warranty will be void if the unit is opened.

User manual SESD 216 / SESD 230 281606 page 5 of 20
2
Introduction
The test generator SESD 216 / SESD 230 simulates "Electrostatic Discharge" as defined in the standard
IEC /EN 61000-4-2. The standard shows two test modes
a) Air Discharge
The discharge electrode with the domed point should first be connected to the SESD. The high voltage
discharge of the generator is into an air gap. The very short rise time of each single pulse generates a
wide RF spectrum and interference’s. This can be the reason for an influenced EUT.
b) Contact Discharge
The discharge electrode with a sharp point is connected to the EUT. The discharge switch is operated by
a vacuum relay allowing a better reproduction of the test results.
If the probe is not in contact with the EUT (e.g. varnished or oxidized surfaces) there will be no triggering
of impulses. The display will show "NO contact". This item makes sure that a discharge took place in the
contact discharge mode
Important! The approach at air discharge has to be started from a distance of at least 20 cm, otherwise
there is the danger of multiple discharge at the single shot mode (discharge voltage can't rise high
enough and is recharged).
You can use the generator either with the built in batteries or with the mains operated power supply.
Automatic tests are available and easy to activate.
3 ESD - Definition
Drawing 1
Test
level Test voltage Air discharge Test voltage
Con
discharge
Rise time
CON
(±25 %)
1. peak
current
(±15 %)
Current
30 ns
(±30 %)
Current
60 ns
(±30 %)
1
2 kV
2 kV
0,8 ns
7,5 A
4 A
2 A
2
4 kV
4 kV
0,8 ns
15,0 A
8 A
4 A
3
8 kV
6 kV
0,8 ns
22,5 A
12 A
6 A
4
15 kV
8 kV
0,8 ns
30,0 A
16 A
8 A
X*
special
special
* Level "X" is an open level.
Table 1: Severity level and waveform parameters at contact discharge

User manual SESD 216 / SESD 230 281606 page 6 of 20
4 Unit function
4.1 Front panel function
Nr.
Normal Mode
Setup Mode
1
On / Off
ON / OFF switch
ON / OFF switch
2 Polarity
Polarity of the pulse,
positive and negative
Use
Use the adjusted
parameters
3 Con/Air Mode CON / AIR Contact discharge or air
discharge
Selection of various
parameters
4 Perm Selection test level,
Continuous mode and
Setup - Mode
Escape Back without saving the
adjusted parameters
5 Value Potentiometer for
output voltage adjust Value Adjustment test level 1 – 4
and pre-selection parame-
ters
6
Counter
Counter pre-selectable
Clear
Clear of the setup values
7
Rep. Freq.
Repetition frequency
Store
Store of the setup values
8
LCD Display
4 lines
2
3
4
1
7
5
8
6

User manual SESD 216 / SESD 230 281606 page 7 of 20
4.2 Case
Drawing 2
[12] Trigger button
[11] Connector for the
discharge return
cable
[10] Test tip for
a) AIR discharge
b) Contact discharge
[13] Connector for the
power supply
[9] Connector for an opti-
cal RS 232 converter
[14] Connector for a tripod

User manual SESD 216 / SESD 230 281606 page 8 of 20
5 Description of function
5.1 ON / OFF - switch
After switching on the generator the LCD display shows the last used parameters. The bottom line shows
the charge status of the accumulator (drawing 3). The accumulator should charge if the bottom line shows
two boxes only. An operation of the generator during the charging process is possible at any time.
In accumulator mode the generator should be switched off after usage.
Drawing 3
5.2 Output voltage adjust
With the potentiometer [5] the output voltage amplitude can be adjust in a range of:
SESD 216 ± 0,2 kV to ± 16,5 kV AIR discharge
± 0,2 kV to ± 10,0 kV Contact discharge
SESD 230
± 0,5 kV to ± 30,0 kV AIR discharge and Contact discharge
The voltage value is shown in the upper line of the LCD display. The voltage can be changed in steps of
100 Volts by turning the potentiometer slowly. Turning the potentiometer fast will increase the voltage
steps.
On the left hand of the voltage display the respective test level "L1" to "L4" is shown
5.3 Polarity
Referring to the standard tests the electrostatic discharges have to be tested in positive (+) and negative
(-) polarity. The display shows the chosen polarity on the left hand of the voltage value, "+" or "-".

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 MΩ. 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.

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 symbols + - 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)