The Model 20/20C is a DC-stable, high-voltage 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 four-quadrant, 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.
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
Model 20/20C Specifications
Performance
Output Voltage Range: 0 to ±20 kV DC or peak AC
Output Current Range: 0 to ±20 mA DC or peak AC
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: Less than ±2 V
Output Noise: Less than 1.5 V rms*
Slew Rate(10% to 90%, typical): Greater than 450 V/µs
Large Signal Bandwidth (-3 dB): DC to greater than 7.5 kHz
Large Signal Bandwidth (1% distortion): DC to greater than 3.75 kHz
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: 0.5 V/ mA
DC Accuracy: Better than 1% of full scale
Offset Voltage: Less than ±10 mV
Output Noise: Less than 30 mV rms*
Bandwidth (-3dB): DC to greater than 10 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 high-voltage output.
Dynamic Adjustment: Graduated 1-turn panel potentiometer is used to optimize the AC response for various load parameters
Current Limit/Trip: Switch selectable for either limit or trip. Graduated 1-turn panel potentiometer is used to adjust limit or trip level from 0 to ±20 mA
Out of Regulation: Status Illuminates and a TTL low is provided when unit fails to produce required HV output such as during current limit or short circuit load conditions
Trip Statu: Illuminates and a TTL low is provided when the high-voltage output is disabled due to the output current exceeding the current trip level, the detection of a high-voltage supply fault or the removal of the top cover
Fault Status: A BNC provides a TTL low when the Model 20/20C is out of regulation for greater than 500 ms
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: 23177
HV Output: Cable PN: 43466
Line Cord, Spare Fuses PN: N5011; selected per geographic destination
Optional Accessories
19” Rack Mount Kit Model: 608RA (with EIA hole spacing) Model: 608RAJ (with JIS hole spacing)