The Model 30/20A is a DC-stable, high-voltage power amplifier featuring an all solid-state design for high slew rate, wide bandwidth, and low-noise operation. t is configured as noninverting with a fixed gain of 3000 V/V and is protected against overvoltage and overcurrent conditions that may be generated by active loads or by output short circuits to ground. Precision voltage and current monitors provide low-voltage representations of the high-voltage output and load current for monitoring purposes or for use as feedback signals in a closed-loop system.
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.
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 uni
CE compliant
Model 30/20A Specifications
Performance
Output Voltage Range: 0 to ±30 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 (inverting/differential option 50 kW, nominal)
DC Voltage Gain: 3000 V/V DC Voltage
Gain Accuracy: Better than 0.1% of full scale
Offset Voltage: Less than ±4 V
Output Noise: Less than 1.5 V rms*
Slew Rate (10% to 90%, typical): Greater than 550 V/µs
Small Signal Bandwidth (-3dB): DC to greater than 30 kHz
Large Signal Bandwidth (2% distortion): DC to greater than 2.5 kHz
Stability: Drift with Time: Less than 50 ppm/hr, noncumulative
Drift with Temperature: Less than 100 ppm/°C
Voltage Monitor
Ratio： 1 V / 3000 V
DC Accuracy： Better than 0.1% of full scale
DC Offset： Voltage Less than ±5 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
Features
Settling Time (to 1%)： Less than 200 µs for a 0-30 kV step Dynamic Adjustment Graduated 1-turn panel potentiometer is used to optimize the AC response for various load parameters.
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.
Current Limit/Trip： Switch selectable for limit or trip. Graduated 1turn panel potentiometer is used to adjust limit or trip level from 0 to ±20 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 exceeding the current trip level, the detection of a highvoltage supply fault, the removal of one of the panels, or if the Model 30/20A is out of regulation for greater than 500 ms.
Mechanical
Dimensions: 103.9 cm H x 43 cm W x 87 cm D (40.9” H x 17” W x 34” D) Depth dimension includes wheels, handles and spacing for air flow.
Weight: 73 kg (160 lb) approximate
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 75%, noncondensing Altitude To 1524 meters (5000 ft.)
Electrical
Line: Voltage Factory set for one of two ranges: 104 to 127 V AC or 180 to 250 V AC at 48 to 63 Hz (specify when ordering)
Power Consumption: 1800 VA, maximum AC Line Receptacle Standard 3-prong with integral fuse holder
Supplied Accessories
Operators Manual PN: 23343
Shorting BNC Cap PN: B3060
HV Output Cable PN: 43466
Line Cord, Fuses Selected per geographic destination
Locking Wheel Kit CN: 1K042
