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Trek Model 10/40A High-Voltage Power Amplifier

The Trek Model 10/40A DC-stable high-voltage power amplifier is used in a variety of applications including pulsed field electrophoresis, AC and DC biasing of electrophotographic rollers, and electrorheological fluid research.

Configured as a noninverting amplifier with a fixed gain of 1000 V/V, the Model 10/40A is designed to provide precise control of output voltages in the range of 0 to ±10 kV DC or peak AC with an output current range of 0 to ±40 mA DC or peak AC.

As with all Trek power amplifier series, the Model 10/40A features an all solid-state design for high slew rate, wide bandwidth, and low-noise operation. A four-quadrant active output stage sinks or sources current into reactive or resistive loads throughout the output voltage range. This type output is essential for achieving the accurate output response and high slew rates demanded by a variety of loads such as highly capacitive or inductive loads.

The Model 10/40A is protected against overvoltage and overcurrent conditions that may be generated by active loads or by output short circuits to ground. A mode switch allows the user to select either CURRENT LIMIT or unit TRIP-OFF if the output current reaches the pre-set current value, as determined by a current set potentiometer. An automatic internal power monitor and limit function automatically protects the unit from excessive internal power dissipation to prevent the output stages from overheating.

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 auxiliary closed-loop systems.

A Remote High Voltage On/Off feature provides a connection for a remotely located device to turn on and off the high voltage of the amplifier. This makes the Model 10/40A suitable for automated or computer controlled systems. The Model 10/40A can be operated on a bench top or in a 19-inch rack.

 

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AMPLIFIER INPUT & OUTPUT

Output Voltage Range
0 to ±10 kV DC or peak AC.

Output Current Range
0 to ±40 mA DC or peak AC. (See Automatic Power Limit feature for limitations.)

Input Voltage Range
0 to ±10 V DC or peak AC.

Input Impedance
25 kΩ, nominal.

PERFORMANCE

DC Voltage Gain
1000 V/V.

DC Voltage Gain Accuracy
Better than 0.1% of full scale.

Offset Voltage
Less than ±2 V.

Output Noise
Less than 0.5 V rms (measured using the true rms feature of the Hewlett Packard Model 34401A digital multimeter).

Slew Rate (10% to 90%, typical)
Greater than 750 V/µs.

Large Signal Bandwidth (-3dB)
DC to greater than 23 kHz.

Large Signal Bandwidth (1% distortion)
DC to greater than 7.5 kHz.

Small Signal Bandwidth (-3dB)
DC to greater than 25 kHz.

Settling Time (to 1%)
Less than 150 µs for a 0 to 10 kV step.

Stability

  • Drift with Time
    Less than 50 ppm/hr, noncumulative.
  • Drift with Temperature
    Less than 100 ppm/°C.

Automatic Power Limit
Automatically limits the internal power dissipation to protect the Model 10/40A from overheating . The following graph illustrates the Model 10/40A automatic AC and DC power limits.

Model 10/40A Output Operating Range

 

PRODUCT FEATURES

High-Voltage On/Off High-Voltage On/Off
Switch selectable for either local or remote control.

  • Local
    Individual push-button switches.
  • Remote
    A TTL compatible input. A TTL high (or open) turns off the high-voltage output. A TTL low turns on the high-voltage output.

Dynamics Adjust
A graduated one-turn panel potentiometer is used to optimize the AC response of the Model 10/40A under various load conditions.

Current Limit/Trip
Switch selectable for either limit or trip. A graduated one-turn panel potentiometer is used to adjust the limit or trip level from 0 to 40 mA.

Out of Regulation Status
A yellow indicator will illuminate and a BNC will provide a TTL low when the Model 10/40A fails to produce the required high-voltage output such as during current limit or short circuit load conditions.

Trip Status
A yellow indicator will illuminate and a BNC will provide a TTL low when the high-voltage output is disabled due to:

  • the activation of the current trip, or
  • the removal of the top cover.

Fault Status
A BNC will provide a TTL low when the Model 10/40A is out of regulation for greater than 500 ms.

Voltage Monitor
A buffered output providing a low-voltage replica of the high voltage output.

  • Scale
    1/1000th of the high-voltage output signal.
  • DC Accuracy
    Better than 0.1% of full scale.
  • AC Accuracy
    Calibrated against a Ross Model VD30-4.1 BD-KC-ALU high-voltage probe.
  • Offset Voltage
    Less than ±2 mV.
  • Output Noise
    Less than 10 mV rms (measured using the true rms feature of the Hewlett Packard Model 34401A digital multimeter).
  • Output Impedance
    47 Ω.

Current Monitor
A buffered output providing a low-voltage representation of the load current.

  • Scale
    0.1 V/mA.
  • DC Accuracy
    Better than 1% of full scale.
  • Offset Voltage
    Less than ±10 mV.
  • Output Noise
    Less than 30 mV rms (measured using the true rms feature of the Hewlett Packard Model 34401A digital multimeter).
  • Bandwidth (-3db)
    DC to greater than 5 kHz.
  • Output Impedance
    47 Ω.

GENERAL

Power Requirements

  • 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
    1000 VA, maximum.

Operating Conditions

  • Temperature
    0 °C to 40 °C.
  • Relative Humidity
    To 75%, noncondensing.

Dimensions
279 mm H x 482 mm W x 654 mm D
(11" H x 19" W x 25.8" D).

  • Weight
    24.9 kg (55 lb).

High-Voltage Output Connector
Alden high-voltage connector.

Amplifier Input
BNC connector.

Voltage Monitor Connector
BNC connector.

Current Monitor Connector
BNC connector.

Remote High-Voltage On/Off Connector
BNC connector.

Out of Regulation Status Connector
BNC connector.

Fault/Trip Status Connector
BNC connector.

AC Line Receptacle
Standard IEC 320 three-prong AC line connector.

CERTIFICATION

All specifications are with no load unless otherwise noted.
All specifications are subject to change.

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