Trek 50-12 User Manual
Trek Model 50/12
High-Voltage Power Amplifier
The Model 50/12 is a DC-stable, high-voltage power amplifier featuring an all solid-state design for high slew
rate, wide bandwidth, and low-noise operation. It is designed to provide precise control of output voltages in the
range of 0 to ±50 kV DC or peak AC with an output current range of 0 to ±12 mA DC or peak AC.
The 4-quadrant, active output stage sinks or sources current to reactive or resistive loads throughout the
output voltage range. This is essential to achieve the accurate output response and high slew rates demanded
by reactive loads.
Key Specifications
! Output Voltage Range:
! Output Current Range: peak AC
! Slew Rate: Greater than 350 V/
Large Signal Bandwidth: DC to greater than 1.4 kHz
!
(2% Distortion)
DC Voltage Gain: Fixed at 5000 V/V
!
0 to ±50 kV DC or peak AC
0 to ±12 mA DC or
µs
Typical Applications Include
! Dielectric studies
! Electron beam ion traps and ion sourcing
! Electrospinning
! Electrostatic deflection (including ion beam steering)
! Electrostatic flame control
! Electrostatic levitation
! Electrostatic precipitation
! High-voltage cable testing
! High-voltage component testing
! Plasma studies (including dielectric barrier discharge)
Features and Benefits
! Four-quadrant output for driving capacitive loads
Closed loop system for high accuracy
!
Short-circuit protected for equipment protection
!
All solid-state design for maintenance free operation
!
DC-stable for programmable supply applications
!
Low output noise for ultra-accurate outputs
!
NIST-traceable Certificate of Calibration provided with each unit
!
compliant
!
TREK, INC. • 190 Walnut Street • Lockport, NY 14094 • USA • 800-FOR TREK
(fax) • www.trekinc.com • sales@trekinc.com 716-438-7555 • 716-201-1804
Features
High-Voltage On/Off
Local
Individual push-button switches
Remote
TTL compatible input. TTL high (or open) turns
off high-voltage output. TTL low turns on highvoltage output.
Dynamic Adjustment
Graduated 1-turn potentiometer is used to
optimize the AC response for various load
parameters.
Current Limit/Trip
Switch selectable for limit or trip. Graduated 1turn panel potentiometer is used to adjust limit
or trip level from 0 to ±12 mA.
Out of Regulation
Status Indicator and
Connnector
Illuminates and TTL low is provided when unit
fails to produce required HV output such as
during current limit.
Limit/Trip Status
Indicator and
Connector
An indicator will illuminate and a BNC will
provide a TTL low when the high-voltage output
is disabled due to the output current trip level,
the detection of a high-voltage power supply
fault, removal of one of the panels, or if the
Model 50/12 is in an out of regulation status for
greater than 500 ms.
Mechanical
Dimensions
1473.5 mm H x 628.7 mm W 948.4 mm D
(58.01” H x 24.75” W x 37.34” D)
Weight
125-136 kg (275-300 lb)
HV Connector
High Voltage Connector
BNC Connectors
Amplifier Input, Voltage Monitor, Current Monitor,
Remote High Voltage ON/OFF, Out of Regulation
Status, Fault/Trip Status
Operating Conditions
Temperature
0°C to 40°C (32°F to 104°F)
Relative Humidity
To 75%, noncondensing
Altitude
To 1524 meters (5000 ft.)
Electrical
Line Voltage
180 to 250 V AC at 48 to 63 Hz
Power Consumption
1800 VA, maximum
AC Line Receptacle
Standard 3-prong with integral fuse holder
Supplied Accessories
Operators Manual
PN: 23459
Shorting BNC Cap
PN: B3060
HV Output Cable
PN: 43466
Line Cord, Fuses
Selected per geographic destination
Model 50/12 Specifications
Performance
Output Voltage
Range
0 to ±50 kV DC or peak AC
Output Current
Range
0 to ±12 mA DC or peak AC
Input Voltage Range
0 to ±10 V DC or peak AC
Input Impedance
25 kW, nominal (inverting/differential option
50 kW nominal)
DC Voltage Gain
5000 V/V
DC Voltage Gain
Accuracy
Better than 0.1% of full scale
Offset Voltage
Less than ±5 V
Output Noise
Less than 10 V rms*
Slew Rate
(10% to 90%, typical)
Greater than 350 V/µs
Small Signal
Bandwidth (-3dB)
DC to greater than 20 kHz
Large Signal
Bandwidth
(2% distortion)
DC to greater than 1.4 kHz
Stability
Drift with Time
Less than 50 ppm/hr, noncumulative
Drift with
Temperature-
Less than 100 ppm/°C
Voltage Monitor
Ratio
1 V / 5000 V
DC Accuracy
Better than 0.1% of full scale
DC Offset Voltage
Less than ±4 mV
Output Noise
Less than 20 mV rms*
Output Impedance
47 W
Current Monitor
Ratio
0.5 V/mA
DC Accuracy
Better than 2% of full scale
Offset Voltage
Less than ±10 mV
Output Noise
Less than 30 mV rms*
Bandwidth (-3dB)
DC to greater than 5 kHz
Output Impedance
47 W
*Measured using the true rms feature of the Hewlett Packard Model
34401A digital multimeter
Copyright ã 2012 TREK, INC. All specifications are subject to change. 1248/JRB
Measurement and Power Solutions
TM
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