Schloder ESD User manual

User Manual
ESD Generators
SESD 216 I SESD 230

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Electrostatic Discharge
Generators
SESD 216 16,5 kV
SESD 230 30,0 kV
ATTENTION
This unit generates high voltages and is inherently dangerous. The local, national and all applicable safety
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 removed from the test area.
Before using the generator please read this manual and the warnings to the safety points.
This generator contains a Li-Ion battery.
Please note also Section 5.13.1 “Note / Internal battery”
Scope of delivery:
Transport case with
▪ESD generator SESD 216 / 230
▪Charger with connecting cable
▪Test probes for air discharge (SESD 3020)
▪Test probes for contact discharge (SESD 3021)
▪Ground strap (SESD 231)
▪User manual

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Content
1Introduction .................................................................................................................5
2Safety Instructions........................................................................................................6
2.1 Symbols used ...............................................................................................................6
2.2 Safety Regulations........................................................................................................6
2.3 Impairment of safety....................................................................................................7
3ESD - Definition.............................................................................................................8
4Device functions ...........................................................................................................9
4.1 Front panel...................................................................................................................9
4.2 Casing.........................................................................................................................10
5Function description...................................................................................................11
5.1 ON / OFF - switch .......................................................................................................11
5.2 Output voltage adjust ................................................................................................11
5.3 Polarity switching.......................................................................................................11
5.4 Mode CON / AIR........................................................................................................11
5.4.1 Special function - contact control at Contact Discharge................................12
5.4.2 Special function –displaying of the real discharge voltage at AIR mode ......13
5.5 Repetition frequency .................................................................................................13
5.6 Counter Mode............................................................................................................13
5.6.1 Standard „Counter – Mode“ ..........................................................................13
5.6.2 Polarity changing during the „Counter-Mode“..............................................14
5.7 Continuous discharge.................................................................................................14
5.8 LCD - Display...............................................................................................................15
5.9 Trigger button ............................................................................................................15
5.10 Discharge return cable...............................................................................................15
5.11 Discharge electrodes CON / AIR.................................................................................15
5.12 Power supply..............................................................................................................16
5.13 Display battery charge ...............................................................................................16
5.13.1 Note / Internal battery...................................................................................16
5.14 Connector for a tripod ...............................................................................................16
5.15 Adjustment LCD –Display contrast............................................................................17
5.16 Serial number.............................................................................................................17
6RECALL –Test levels 1 –4 according to IEC/EN 61000-4-2 ...........................................18
6.1 Activation of the function ..........................................................................................18
6.2 Standard test in Counter mode..................................................................................18

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7Setup functions...........................................................................................................19
7.1 Activation of the function ..........................................................................................19
7.2Automatic test............................................................................................................19
7.3 Programming the automatic tests .............................................................................20
7.3.1 Parameters input ...........................................................................................20
7.3.2 Storage oft he parameters.............................................................................21
7.3.3 Clear entry......................................................................................................21
8Self-test –function test...............................................................................................22
8.1 Description of the self-test ........................................................................................22
8.2 Individual description of the steps.............................................................................23
8.2.1 Check of the power supply ............................................................................23
8.2.2 Check at positive polarity...............................................................................23
8.2.3 Check at negative polarity..............................................................................23
9Calibration..................................................................................................................24
9.1 Test equipment for the calibration procedure..........................................................24
9.2 Checking the ESD-pulse..............................................................................................24
10 Test setup...................................................................................................................24
11 Technical data.............................................................................................................25
12 Options.......................................................................................................................26
13 Schematic block diagram ............................................................................................26
14 Maintenance / calibration...........................................................................................27
15 Packing / transport .....................................................................................................27
16 Disposal......................................................................................................................27
17 Manufacturer .............................................................................................................27

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Important Note !
The approach to air discharge should be from a distance of at least 20 cm, otherwise there
is a risk of multiple discharges in single-shot mode (discharge voltage cannot build up com-
pletely and is recharged).
In the event of contact discharge, the pulses are not triggered if there is no contact (e.g.
painted or oxidized surface)! The display shows "No contact". This ensures that a discharge
process actually takes place in the event of contact discharge.
1Introduction
The ESD simulator SESD 216 / SESD 230 is suitable for performing EMC tests on systems and equipment in
accordance with the IEC / EN 61000-4 Part 2 standard. This test is concerned with the immunity behavior to
electrostatic discharge. Depending on the DUT and test setup, two test procedures are to be used:
a) Air Discharge
The discharge electrode with the domed point should first be connected to the SESD. The high voltage dis-
charge 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 electrical contact with the EUT (e.g. varnished or oxidized surfaces) there will be no
triggering of impulses. The display will show "NO contact". This feature makes sure that a discharge took
place in the contact discharge mode
The concept of the ESD generator is designed to work in battery mode. The included power supply unit en-
ables timely charging or "mains operation". In addition to the controlled contact discharge, value was also
placed on a clear and simple operation of the generator.
Automatic test sequences are programmable and easy to activate.

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2Safety Instructions
2.1 Symbols used
Note
This symbol points out additional hints, application tips or information.
Warning / Danger
is used if not following the instructions may cause personal injury, material damage or
environmental damage.
Danger is used if not following the instructions may result in danger of life. Regard these
instructions and take care of your actions.
Electric shock
This symbol warns against danger for life caused by electric shock. Regard these instruc-
tions and take care of your actions.
2.2 Safety Regulations
The SESD 216 and SESD 230 test generators generate high voltages of up to 16,500 volts and up to 30,000
volts respectively. The energy of this high voltage is so limited that it is normally not life-threatening for
humans. Nevertheless, consequential damage may possibly be caused by contact (e.g. shock, etc.).
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.
The tests with the SESD generator on test specimens shall be carried out by a qualified electrician as defined
in DIN 570105 / VDE 0105 part 1 or VBG 4. Care must be taken to ensure that the power supply unit is
operated only with the appropriate protective grounded sockets; the breaking of the grounding connection
is not permitted. The housing and the grounding jack are connected to the protective conductor of the mains.
Attention is drawn to the observance of the accident prevention regulations "Electrical systems and equip-
ment" (VBG1 and VBG2) with implementing instructions.
Warning / Danger
While using the ESD generators it must be made 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!
.
Warning / Danger
The handling of the generator is only allowed to experienced and instructed persons ac-
cording to DIN 570105 / VDE 0105 part 1.
Persons with a cardiac pacemaker are not allowed to handle this unit.
.

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Electric shock !
We warn from untrained staff opening the unit. There is high voltage inside EVEN WHEN
SWITCHED OFF. The warranty will be void if the unit is opened.
The ESD generators SESD 216 and SESD 230 are according to its specifications designedonly forlaboratory
use in the industrial surrounding (tests in a Faraday’s cage).
2.3 Impairment of safety
If the unit has visible damage so that a save operation is no longer possible, it has to be set out of operation.
It has to be ensured against unauthorized usage. The unit has to be send immediately to the manufacture /
dealer with a description of the damage!
Warning / Danger
The absence of a protective earth connection presents a danger to the user and can also
destroy the power supply of the ESD generator. Damage to the power supply due to lack of
protective earth is not covered by the warranty.

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3ESD - Definition
Figure 1: Representation of the ESD pulse according to the standard
Test
level
Test voltage
Air discharge
Test voltage
Con discharge
Rise Time
„CON“
(25 %)
1. peak
current
(15 %)
Current after
30 ns
(30 %)
Current after
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

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4Device functions
4.1 Front panel
Nr.
Normal Mode
Setup Mode
[1]
On / Off
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
8
5
7
1
6
4
3
2

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4.2 Casing
Figure 2: Housing functions
[9] Connector for an optical RS 232 converter
[10] Test tip for: a) AIR discharge b) Contact discharge
[11] Connector for the discharge return cable
[12] Trigger button
[13] Connector for the power supply
[14] Connector for a tripod
Technical drawing
14
44
14
4
13
9
14
4
11
44
14
4
12
44
14
4
10
14
4
All data in mm

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5Function description
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 be charged 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.
Figure 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 switching
During the standard test, the electrostatic discharges are to be tested with both polarities - "Positive ( + ) and
Negative ( - )". This changeover is performed by simply pressing the [2] Polarity key. In the display, the voltage
value is preceded by " + " or " - ".
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". Simulta-
neously 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".

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Air Discharge:
1. Setup the ESD Generator to the discharge mode and the voltage you want
2. Press the triggerso that the ESD Gun can chargeup (this takes 50ms) and KEEP THE TRIGGER
BUTTON PRESSED! A * appears in the upper left corner of the display.
3. Move the tip of the ESD Generator from a distance of at least 20 cm to the surface of the
EUT and move slowly to the EUT until the discharge happens.
4. In the test mode "single" the "real discharge voltage" can be shown in the display. When
keeping the trigger button pressed after the discharge, the voltage in the display changes
from the set voltage to the real discharge voltage.
Example: Adjusted voltage 12.0 kV: 9.7 kV is flashing. That means the value 9.7 kV is the
actual discharge voltage and the difference between the value of the adjusted voltage (12.0
kV) and the residual voltage on the capacitor (2.3 kV).
Contact Discharge:
1. Setup the ESD Generator to air discharge and the voltage you want.
2. Touch the EUT with the tip of the ESD Generator.
3. Press the trigger and the discharge of the adjusted voltage will happen.
4. If the discharge does not happen, e.g. due to high electrical resistance of the EUT, a message
"NO CONTACT" is shown on the display (see point 5.4.1).
5.4.1 Special function - contact control at Contact Discharge
If the test mode is set to "CON" the triggering can only be detected if the serial resistance in the test circuit
is lower than 4 M. 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 "NO CONTACT". At these
levels the discharge occur even if the serial resistance is lower than 4 M
Switch OFF contact control at CON
➔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 [Coun-
ter] 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 between ON and OF.
With the button „Perm“ [4] = „Escape“ you leave this menu and goes to the normal mode.

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5.4.2 Special function –displaying of the real discharge voltage at AIR mode
In the test mode “AIR” and “Single” the “real discharge voltage” can be shown 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 actual discharging voltage a is the difference between the value of the
adjusted voltage (12.0 kV) and the residual voltage on the capacitor (2.3 kV).
5.5 Repetition frequency
By pressing the button „Rep. Freq.“ [7], 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 repeat).
Contact discharge: SINGLE, 0,1 Hz; 0,2 Hz; 1 Hz; 2 Hz; 5 Hz; 10 Hz or 20 Hz.
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. After pressing the button „Counter“ [6] again the displayed value is stored 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 adjusted total number of pulses. When the coun-
ter 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 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 released and
when the key is released, the normal display appears without the information C: XXXX.

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Note !
We recommend using the counter function only with contact discharge, because only in this
mode is correct counting guaranteed. With air discharges, even partial discharges can cause
a counting process and thus falsify the number of actual test cycles.
5.6.2 Polarity changing during the „Counter-Mode“
In the standard mode the ESD pulse discharge positive „+“ or negative „-“. The display shows:
+ 6,5 kV
C: 140/ 140
By using the counter mode it is possible to change the polarity after half of the nominal discharges happened:
1. Activate the „Counter“ mode with button [6].
2. On the right side in the second line the last selection is shown.
3. Push the button „Polarity“ [2]. Behind the letter “C” the symbols + - or - +.
4. By pressing the button „Counter“ [6] the display show:
+ 6,5 kV or - 6,5 kV
C: + - 140/ 140 C: - + 140/ 140
With this setting and pressing the trigger key [12] the counter is reduced and after half of the triggered pulses
the polarity is changed automatically.
5.7 Continuous discharge
At longer tests or by using the tripod it is useful to work in automatic mode.
Switch on: Push button "Perm.“ [4]. The display show the picture below. Push the trigger button [12]
and release it. The function "continuous discharge" is activated. The display shows in the
first line „Perm“.
Switch off: Press the trigger button [12] –the function "continuous discharge" is stopped.
The function "continuous discharge" is always possible –in a normal mode and in the counter mode.
Simply press the button „Perm“ [4] and the trigger button [12]. In the counter mode the information „Perm“
is also displayed.
Information:
Regarding the function „RECALL →MOVE POT FOR SETUP“ please see chapter 6 and 7.

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5.8 LCD - Display
The upper line of the display shows the test voltage in kV and polarity. The second line is empty. In the
counter mode –see chapter 5.6 –the display shows the quantity of discharged pulses.
The left side of the third line gives information about the test mode (CON / AIR), the right side shows the
selected repetition frequency.
The bottom line informs about the status of the accumulator charge. The accumulator should be charged if
the display shows two squares only.
Special information " * " and " _ " :
The " * "- sign in the left hand side of the upper line signifies "Attention! High Voltage" at the test tip. The
information is displayed as long as the trigger button [12] is pressed. After releasing the button [12] the sign
"_" appears for two or three seconds. During this time the high voltage is discharged internally. While the
symbol "_" is displayed, you should not try to change the test tips.
5.9 Trigger button
With the button [12] the discharge is released. There are also special functions that are shown in previous
chapters.
5.10 Discharge return cable
The discharge return cable has to be connected to the ground connector [11]. The other end has to be con-
nected to ground, either to the ground plane of the test bay or directly to the EUT
5.11 Discharge electrodes CON / AIR
The test probes can then be changed by simply pulling and plugging them on. Please ensure that the correct
test probes are used according to the selected test mode ("pointed" for contact discharge, "round" for air
discharge). If the "wrong" test probes are used, the triggered pulses will not comply with the technical spec-
ification and the standard.
Attention!
Before the discharge electrodes are changed, please switch the generator off and wait for
two or three seconds to allow the high voltages to be internally discharged.

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5.12 Power supply
The generator is connected to the power supply via the socket [13]. The ESD generator can be used either
independently, using the built in batteries or while connected to the mains supply.
After the charging of the accumulator (the charge line is than showing full on the display), the power supply
can be removed and the testing can go on with the accumulator only.
The charging of the accumulator can be interrupted at any time in case the power supply cord is hindering
the use of the generator.
The default usage of the generator is in the accumulator-supply
The power supply can be used in a wide range of voltage (85 V to 264 V) and frequency (47 Hz to 63 Hz).
5.13 Display battery charge
The ESD generator has a Lithium-Ion accumulator. A special electronic is responsible to control and charge
the batteries.
During the charging of the accumulator the display shows in the bottom line:
LINE CHARGE _ _ _ _ _ 
The continuous under lines shows the charge function. During the charging the ESD generator can be used
without restrictions.
In case the generator is switched off during the charging, the display continuously shows the charging pro-
cedure.
5.13.1 Note / Internal battery
The generator is equipped with a high-quality lithium-ion battery. This battery has a long lifetime and is de-
signed for several hundred charging cycles. However, the battery shall never be deeply discharged. For this
reason the generator is switched off automatically at a certain minimum voltage and only a small technically
related leakage current of approx. 100 µA flows. This however has the consequence that, after a certain time,
the self-discharge of the battery would still cause the deep discharge. For safety reasons, a deeplydischarged
battery will be protected permanently from further charging by an internal protection circuit and thus must
be replaced by the manufacturer.
To prevent this from occurring, the user has to ensure that, when not using the generator, the battery has
always to be charged previously. We recommend in addition the check the charge level at least every 8 weeks
and reload in case of need.
5.14 Connector for a tripod
Normal tripods can be used for continuous testing. The continuous discharge is explained in chapter 5.7

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5.15 Adjustment LCD –Display contrast
➔Switch OFF the ESD generator. Press the [Rep. Req.] button [7] and hold down, then press
shortly the "ON / OFF" button.
The display shows "ADJUSTMENT OF CONTRAST".
With the potentiometer [5] the contrast can be changed. By pressing the button [Rep. Freq.] again, the new
parameters are saved.
5.16 Serial number
Each ESD generator has a serial number written into the software. You can display the number on the LCD
display as follows:
Switch OFF the ESD generator. Press and hold down the buttons [Perm], [Polarity] and [Counter], then press
shortly the “ON/OFF” button. The display shows now the serial number in the upper line on the right side.
This will be displayed for some seconds.

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6RECALL –Test levels 1 –4 according to IEC/EN 61000-4-2
6.1 Activation of the function
Push button „Perm“ [4], the display shows:
Turn the potentiometer [5] to left for activating the test level according to the standard. Successively the test
level 4, 3, 2, 1 are displayed. Turn the potentiometer to right, the test level are displayed increasing.
By selecting test level 4 and pressing the key „Polarity“ [5] the test parameters according the standard level
4 will displayed.
A test can be started directly by pressing the trigger button [12]. The adjustment can be changed at any time.
The basic parameters of the test levels cannot be changed.
6.2 Standard test in Counter mode
Press button „Perm“ [4] and follow the instruction in chapter 6.1 and set the parameters in the display. Now
press button „Counter“ [6] and adjust the quantity of the discharge pulses –see chapter 5.6 “Counter Mode”.

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7Setup functions
7.1 Activation of the function
After pressing the button „Perm“ [4] the display shows the picture below:
Turn the potentiometer [5] to right for activating several setups. Successively the setups SET 01, SET 02 and
so on are displayed. There are maximum 20 setups possible. The picture below shows an example with SET
01.
7.2 Automatic test
After selecting the appropriate setup program - e.g. SET 02 - the stored values are transferred to the display
by means of the "Polarity" button [2] - see the following example:
In addition to the usual view, the display shows SET 02 in the second line on the left and the total number of
test steps (SP) in the third line next to "CON". The number of test steps "SP" is a calculatory value which
results from the parameters initial voltage (STA), final voltage (END) and step size (STE). In the example
shown, there are a total of 46 steps, with five ESD discharges per step.
The total test time depends on the selected repetition frequency.
The automatic test procedure is started by means of the release button [12].

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7.3 Programming the automatic tests
After activating the setup function - chapter 7.1 - select a memory location that you want to program. In
principle, existing memory locations SET 01 - SET 20 can be overwritten or, if not yet occupied, rewritten. All
20 memory locations are numbered, these numbers - SET 01 to SET 20 - cannot be changed.
The 5 buttons and the potentiometer are double assigned. In setup mode they get another function.
Nr.
Normal Mode
Setup Mode
2
Polarity
Polarity of the pulse,
positive and negative
Use
Take over the adjusted
parameters
3
Con/Air
Mode CON / AIR
Contact discharge or air
discharge
→
Selection of 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 Setup
6
Counter
Counter pre-selectable
Clear
Clear of the setup values
7
Rep. Freq.
Repetition frequency
Store
Store of the setup values
7.3.1 Parameters input
The example describes programming an empty memory location - e.g. SET 10.
To the right of "SET 10" an arrow (arrow direction left) can be seen. This arrow marks the position of the
input fields. The arrow can be "scanned" to any position using the "Con / Air" button. Values on the individual
positions can be adjusted with the aid of the potentiometer.
Example:
MOD The rotation of the potentiometers causes the indication AIR or CON. Similarly
some parameters are activated, depending on the choice AIR or CON.
REP The repetition frequencies are stored and can be selected.
POL Choice of the polarity
SPA The arrow points to the right, the „Starting voltage“ can be set.
STE Enter the „voltage step“ or „ increment “.
END Entering the „final voltage“ or the maximum test voltage.
NBSTEP „Number of steps“ – indicating the number of test pulses per increment.
Depending on the voltage swing (beginning and end) and the step size results in a maximum
possible number of discharges per step. A higher number cannot be set.