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S p e z i a l e l e k t r o n i k     G m b H

iseg Spezialelektronik GmbH

Email: [email protected]

Phone ++ 49 351 / 26 996 - 0

Bautzner Landstr. 23

http://www.iseg-hv.com

Fax

++ 49 351 / 26 996 - 21

D - 01454 Radeberg / Rossendorf

Germany

2

1. General information

The EHQ´s are one channel high voltage supplies in a 3U Eurocard Chassis, 8TE wide. The units offers manual
control and operation via RS232 interface (option: CAN Bus interface instead RS232). The use of the interface
supports more then the manual control functionality.
The high voltage supplies special provide high precision output voltage together with very low ripple and noise,
even under full load. Separate 10%-steps hardware switches put voltage and current limits. An INHIBIT input
protects connected sensitive devices. Additionally, the maximal output current is programmable via the interface.
The high voltage output protected against overload and short circuit. The output polarity can be switched over.

2. Technical data

Type (with RS 232)

EHQ 102M

EHQ 103M

EHQ 104M

EHQ 105M

Output voltage V

O

0 ... 2 kV

0 ... 3 kV

0 ... 4 kV

0 ... 5 kV

Output current I

O 24

0 ... 6 mA

0 ... 4 mA

0 ... 3 mA

0 ... 2 mA

Ripple and noise

< 2 mV

P-P

< 5 mV

P-P

Resolution of current measurement

1 µA; Option 0n1: I

O max

 = 100 µA 

 100 nA

Resolution of voltage measurement

1 V

Accuracy

current measurement

± (0,05% I

O

 + 0,02% I

O max

 + 1 digit) for one year

voltage measurement

± (0,05% V

O

 + 0,02% V

O max

 + 1 digit) for one year

LCD display

4 digits with sign, switch controlled

- voltage display in [V]

- current display in [µA]

Stability

 V

O

 (no load / load)

< 5 

 10

-5

 V

O

/V

INPUT

< 5 

 10

-5

Temperature coefficient

< 5 

 10

-5

/K

Voltage control

CONTROL switch in position

-manual: 

10-turn potentiometer,

-DAC: 

control via serial interface

Rate of change of

HV -ON/OFF

500 V/s (hardware ramp)

output voltage

remote control

2 ... 255 V/s (software ramp)

Protection

-separate current and voltage limit
 (hardware, rotary switch in10%-steps)

-INHIBIT (external signal, TTL level, Low=active)

-programmable current limit (software)

Power requirement V

INPUT

±

 24 V  (< 500 mA), 

Option:

 

±

 12 V 

 I

O 12 

= I

O 24

/2

Operating temperature

0 . . . 50 °C

Storage temperature

-20 . . . +60 °C

Packing

3U Euro cassette / 160 mm depth / 40,8 mm wide

Connector

96-pin connector according to DIN 41612

HV connector

SHV-Connector at the front panel

Inhibit connector

1-pin Lemo-hub

Содержание EHQ 102M

Страница 1: ... A Block diagram Appendix B Rotary switch locations Attention The unit shall not be operated with the cover removed We decline all responsibility for damages and injuries caused by an improper use of the mo dule It is highly recommended to read the operators manual before any kind of operation Note The information in this manual is subject to change without notice We take no responsibility whatsoe...

Страница 2: ...tage VO 0 2 kV 0 3 kV 0 4 kV 0 5 kV Output current IO 24 0 6 mA 0 4 mA 0 3 mA 0 2 mA Ripple and noise 2 mVP P 5 mVP P Resolution of current measurement 1 µA Option 0n1 IO max 100 µA 100 nA Resolution of voltage measurement 1 V Accuracy current measurement 0 05 IO 0 02 IO max 1 digit for one year voltage measurement 0 05 VO 0 02 VO max 1 digit for one year LCD display 4 digits with sign switch cont...

Страница 3: ...ed with very high precision to the set point Separate security circuits prevent exceeding the front panel switch settings for the current Imax and voltage Vmax limits A monitoring circuit prevents malfunction caused by low supply voltage The internal error detection logic evaluates the corresponding error signals and the external INHIBIT signal It allows the detection of short overcurrent due to s...

Страница 4: ...1 and a sign on the LCD display 1 Attention It is not allowed to change the polarity under power An undefined switch setting not at one of the end positions will cause no output voltage High voltage output is switched on with HV ON switch 5 at the front panel The viability is signalled by the yellow LED 9 Attention If the CONTROL switch 6 is in upper position manual control high voltage is generat...

Страница 5: ...ight position ENABLE KILL The output voltage will be shut off permanently without ramp on exceeding Vmax Imax or in the presence of an INHIBIT signal Low active at the INHIBIT input 8 Restoring the output voltage is possible after operating the switches HV ON 5 or KILL 7 or Read status word and then Start voltage change by DAC control If Auto start is active Start voltage change is not necessary N...

Страница 6: ...e of the break time allow the computer to receive and evaluate the incoming data Break time is setting 3 ms at works The hardware setting of the RS232 interface is 9600 bit s 8 bit character no parity 1 stop bit Signal transmission is performed potential free via the RxD and TxD relative to GND The pin assignment when a PC is used is given in table 1 Control signals to be bridged on the PC side wh...

Страница 7: ... ramp speed 2 255 V s Start voltage change channel 1 G1 G1 S1 xxx S1 Status information Write current trip cannel 1 L1 nnnn L1 nnnn corresponding resolution current 0 Read current trip channel 1 L1 L1 nnnn s a for nnnn 0 no current trip Read status word channel 1 S1 S1 xxx S1 Status information Read module status channel 1 T1 T1 nnn code 0 255 Module status Write auto start channel 1 A1 nn A1 nn c...

Страница 8: ...ON position 0 POL Polarity set to positive 2 1 4 negative 0 MAN Control manual 1 1 2 via RS 232 interface 0 T1 U I Display dialled to voltage measurement 0 1 1 current measurement 0 Auto start Description Bit Valency If module status OFF ERR INH MAN 0 output voltage of the channel ramping at set voltage G command is not necessary after D command POWER ON and OFF ON If output voltage shut off perma...

Страница 9: ...d unsigned char readU U 1 cr lf etx read voltage unsigned char sendU D 1 1 0 cr lf etx set voltage to 10V unsigned char ptr unsigned char rby int i cnt booleanok void main void clrscr COM2_init COM2_set 9600 COM2 9600 baud 8 databits no parity 1 stopbit ok True_ ptr readU for if ptr etx break COM2_send ptr send one byte rby COM2_read read one byte if rby ptr ok False_ compare sent with read data e...

Страница 10: ...ay driver Microcontroller Reference voltage ADC MUX DAC 1 DAC 2 Front panel Operating elements Resonance Converter HV Transformer Rectifier Polarity switch HV Filter HV OUTPUT Channel A rectifier AGC amplifier Precision V monitoring max I monitoring max Error logic Inhibit Supply voltage monitoring Hardware voltage ramp Filter 24V 96 pin connector according to DIN 41612 Filter Appendix A Block dia...

Страница 11: ...Phone 49 351 26 996 0 Bautzner Landstr 23 http www iseg hv com Fax 49 351 26 996 21 D 01454 Radeberg Rossendorf Germany 11 Imax Vmax 10 2 4 6 8 10 2 4 6 8 POLARITY NEG POS Appendix B EHQ side cover Polarity rotary switch e g polarity negative Rotary switches for Vmax and Imax ...

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