Trek 20-20C-HS User Manual
Trek Model 20/20C-HS
High-Speed High-Voltage Power Amplifier
The Model 20/20C-HS is a DC-stable, high-speed, highvoltage power amplifier used in industrial and research
applications. It features an all-solid-state design for high slew
rate, wide bandwidth and low-noise operation. The fourquadrant, active output stage sinks or sources current into
reactive or resistive loads throughout the output voltage range.
This type of output is essential to achieve an accurate output
response and high slew rate demanded by a variety of loads
such as highly capacitive or reactive loads. It is configured as a
non-inverting amplifier.
Key Specifications
! Output Voltage Range:
! Output Current Range: peak AC for 1 ms (must not exceed 20 mA rms)
! Slew Rate: Greater than 800 V/
!
Large Signal Bandwidth (1% Distortion): DC to greater than 5.2 kHz
!
DC Voltage Gain: Fixed at 2000 V/V
0 to ±20 kV DC or peak AC
0 to ±20 mA DC or 60 mA
µs
Typical Applications Include
! Electrostatic deflection
! Electrophoresis
! Electrorheological fluids
! Electro-optic modulation
! Material poling
! AC or DC biasing
! Ion beam steering
! Particle accelerators
! Mass spectrometers
! Material characterization
! Ferroelectrics
! Atmospheric plasma
! 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
CE compliant for assured reliability
!
All solid-state design for maintenance free operation
!
DC-stable for programmable supply applications
!
Low output noise for ultra-accurate outputs
!
TREK, INC. • 190 Walnut Street • Lockport, NY 14094 • USA • 800-FOR TREK
716-438-7555 • 716-201-1804 (fax) • www.trekinc.com • sales@trekinc.com
Features (cont.)
Dynamic Adjustment
Graduated 1-turn potentiometer is used to
optimize the AC response for various load
parameters
Limit/Trip Mode
Switch selectable for either limit or trip.
Graduated 1-turn potentiometer is used to
adjust limit or trip level from 0 to 100% peak
current. There is one LED indicator and one
BNC connector
Trip Status Indicator
and Connector
An indicator will illuminate and a BNC will
provide a TTL low when the high-voltage is
disabled due to the output current exceeding
the current trip level, the detection of a highvoltage power supply fault, removal of one of
the panels, or if the 20/20C-HS is out of
regulation for greater than 500 ms.
Out of Regulation
Status
Illuminates and a TTL low is provided when unit
fails to produce required HV output such as
during a current limit
Mechanical
Dimensions
279 mm H x 482 mm W 654 mm D
(11” H x 19” W x 25.75” D)
Weight
24.9 kg (55 lb)
HV Connector
Caton 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 85%, noncondensing
Altitude
To 2000 meters (6561.68 ft.)
Electrical
Line Voltage
Factory Set for one of two ranges:
104 to 127 V AC or 180 to 250 V AC,
either at 48 to 63 Hz
AC Line Receptacle
Standard IEC 320 three-prong AC line
connector
Power Consumption
1000 VA, maximum
Supplied Accessories
Operators’ Manual
PN: 23461
HV Output Cable
PN: 43466
Line Cord, Spare
Fuses
PN: N5011.
destination
Selected per geographic
Model 20/20C-HS Specifications
Performance
Output Voltage
Range
0 to ±20 kV DC or peak AC
Output Current
Range
0 to ±20 mA DC or ±60 mA peak for 1 ms (must
not exceed 20 mA rms)
Input Voltage Range
0 to ±10 V DC or peak AC
Input Impedance
25 kW, nominal
DC Voltage Gain
2000 V/V
DC Voltage Gain
Accuracy
Better than 0.1% of full scale
DC Offset Voltage
Better than ±2 V
Output Noise
Less than 1.5 V rms*
Slew Rate
(10% to 90%, typical)
Greater than 800 V/µs
Large Signal
Bandwidth
(1% distortion)
DC to greater than 5.2 kHz
(The unit will trip when maximum is reached)
Small Signal
Bandwidth (-3dB)
DC to greater than 20 kHz
Stability
Drift with Time
Less than 50 ppm/hr, noncumulative
Drift with Temp
Less than 100 ppm/°C
Voltage Monitor
Ratio
1/2000th of the high-voltage output
DC Accuracy
Better than 0.1% of full scale
DC Offset Voltage
Less than ±2 mV
Output Noise
Less than 10 mV rms*
Output Impedance
47 W
Current Monitor
Ratio
1 V/6 mA
DC Accuracy
Better than 1% of full scale
Offset Voltage
Better than ±10 mV
Output Noise
Less than 30 mV rms*
Bandwidth (-3dB)
DC to greater than 20 kHz
Output Impedance
47 W
Features
High-Voltage On/Off
Local
Individual push-button switch
Remote
TTL compatible input. TTL high (or open) turns
off high-voltage output. TTL low turns on highvoltage output.
*Measured using the true rms feature of the HP Model 34401A digital multimeter
Measurement and Power Solutions
Copyright ã 2013 TREK, INC. All specifications are subject to change. 1322/JRB
TM
www.trekinc.c o m
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