Download Gamma series (628, 728, 828, 2878, 2928)

Gamma series
(628, 728, 828, 2878, 2928)
Precision Laboratory HV Power Supplies
Variable Output Voltages to 100kV
100 Watts Power Rating
Features
q Mains input 220/240V 50/60Hz
With compliments
Helmut Singer Elektronik
www.helmut-singer.de [email protected]
fon +49 241 155 315
fax +49 241 152 066
Feldchen 16-24 D-52070 Aachen Germany
q Output reversible by fitting alternative
multiplier module within the supply.
q Local or remote control - switch selectable
q Analogue voltage and current meters
q Highly stable output with low ripple and drift
q Overload trip - push button reset
Description
The Gamma series of precision laboratory high voltage supplies includes five models to cover the range of
voltages from 1kV to 100kV at power levels up to 100 Watts. Operating from standard 220/240V mains power,
these units provide a well stabilised, low ripple output with good line and load regulation. The high voltage
sections are fully encapsulated, and alternative plug-in voltage multiplier assemblies are available to enable
a single unit to generate either positive or negative output polarity as required, the polarity selected being
indicated by a front panel lamp. Front panel controls and analogue voltage and current meters are fitted, with
a switch to select local or remote control.
The units incorporate comprehensive protection, with an electronic overload trip circuit which operates an
electromagnetic circuit breaker. They are designed for bench use or rack mounting, the units up to 30kV being
of 4U height and the 50kV and 100kV units of 8U height.
Ordering Information
All versions have internal selector to select nominal input voltage: 220V or 240V at 50/60Hz
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Output Voltage
Range
Polarity of
Multiplier Supplied
Output Current
Output Ripple
(pk-pk.) at full load
Ordering Code
1kV to 10kV
1kV to 10kV
1kV to 10kV
2kV to 20kV
2kV to 20kV
2kV to 20kV
3kV to 30kV
3kV to 30kV
3kV to 30kV
5kV to 50kV
5kV to 50kV
5kV to 50kV
10kV to 100kV
10kV to 100kV
10kV to 100kV
Positive
Negative
Both
Positive
Negative
Both
Positive
Negative
Both
Positive
Negative
Both
Positive
Negative
Both
0 to 10mA
0 to 10mA
0 to 10mA
0 to 5mA
0 to 5mA
0 to 5mA
0 to 3mA
0 to 3mA
0 to 3mA
0 to 2mA
0 to 2mA
0 to 2mA
0 to 1mA
0 to 1mA
0 to 1mA
5V
5V
5V
10V
10V
10V
15V
15V
15V
25V
25V
25V
50V
50V
250V
628-10
628-20
628-30
728-10
728-20
728-30
828-10
828-20
828-30
2878-10
2878-20
2878-30
2928-10
2928-20
2928-30
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Gamma (628, 728, 828, 2878, 2928) series
Electrical Specification
AC supply input
Input power at full load
Output voltage range
Output polarity
Polarity indication
Output current range
Control of output (Local)
(Remote)
Output ripple
Line regulation
Load regulation
Output drift
Temperature coefficient
Protection
220V to 240V, 48 to 62Hz. (110/120V versions available upon request).
280 VA approx.
see Ordering Information
Positive or negative, depending on which multiplier module is fitted, this may be changed by
the user. Note: the multiplier module is housed within the supply and is accessible via the top
cover and side panel.
Front panel lamps.
see Ordering Information.
Front panel VOLTAGE (coarse) and VOLTAGE (fine) controls are effective.
Output voltage is controlled by input to REMOTE connector on rear panel. +1V to +10V dc
input varies output from 10% to 100% of maximum (see Ordering Information)
see Ordering Information
200 ppm (max.) for ±7.5% mains voltage change
500 ppm (max.) for zero to full load
150 ppm (max.) in any 15 min. period (after 150 min. warm-up)
110 ppm per deg.C (typ.)
Electronic trip circuit actuating an electromechanical circuit breaker with push button reset.
Front Panel Meters
Analogue voltmeter
Analogue current meter
Reads from zero to the maximum output voltage (see Ordering Information)
Reads from zero to the maximum output current (see Ordering Information)
Operation of Front Panel Controls
Mains ON/OFF push button When switched ON, the indicator lamp is lit and the control circuits are activated. The HV
output circuits are not activated until the EHT ON/OFF push button is pressed.
Polarity indicator lamps
When mains switch is ON, the + or – indicator lamp lights to show the output polarity,
depending on which HV multiplier module is fitted.
EHT ON/OFF push button Pressing this switch toggles the HV output circuits ON and OFF. When ON, the HV indicator
lamp is lit.
Voltage controls
COARSE and FINE potentiometers set the output voltage when LOCAL is selected
Environmental Specification
Operating temperature range 0 to +35 deg.C
All high voltage assemblies are fully encapsulated for protection against high humidity
Mechanical Specification
Mechanical Specification
Models 628, 728, 828
Models 2878, 2928
Dimensions
Weight
Connections:
Mains
HV output
Dimensions
Weight
Connections:
Mains
HV output
HV return
Remote
482mm (w) x 178mm (h) x 486mm (d)
23kg approx.
A 3-core mains lead with plug is fitted.
Brandenburg Type 37 moulded socket.
A 2m long output cable with mating
connector is supplied
Screw terminal, internally linked to
chassis
5 way DIN connector
Pin 4 : Remote control input
Pin 5 : Control 0 V
For outline drawing see Alpha 3
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HV return
Remote
482mm (w) x 356mm (h) x 448mm (d)
35kg approx.
A 3-core mains lead with plug is fitted.
2 metres polythene insulated screened
cable and cable clamps (other lengths to
order)
Screw terminal, internally linked to
chassis
5 way DIN connector
Pin 4 : Remote control input
Pin 5 : Control 0 V
For outline drawing see Alpha 3
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