TREK Product - Model 5/80 High-Voltage Power Amplifier

Model 5/80 High-Voltage Power Amplifier

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The Trek Model 5/80 is a DC-stable, high-voltage power amplifier designed to provide precise control of output voltages in the range of 0 to ±5 kV DC or peak AC with an output current range of 0 to ±80 mA DC or peak AC. It is configured as a noninverting amplifier with a fixed gain of 1000 V/V. Industrial and research applications include dielectric material characterization, polymer and ceramic corona charging, and piezoelectric driving and control.

The Model 5/80 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 is essential for achieving the accurate output response and high slew rates demanded by reactive loads.

The Model 5/80 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 Remote High-Voltage On/Off feature provides a connection for a remote device to turn on and off the High-Voltage of the instrument. This makes the Model 5/80 suitable for automated or computer controlled systems. The Model 5/80 can be operated on a bench top or in a standard 19-inch rack.

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Output

Output Voltage Range
0 to ±5 kV DC or peak AC.

Output Current Range
0 to ±80 mA DC or peak AC. (See Automatic Power Limit feature for limitations.)

Amplifier Input

Input Voltage Range
0 to ±5 V DC or peak AC.

Input Impedance
10 kΩ, nominal.

Features

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.

Dynamic Adjustment
A graduated one-turn panel potentiometer is used to optimize the AC response of the Model 5/80 for various load parameters.

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 ±80 mA.

Out of Regulation Status
An indicator will illuminate and a BNC will provide a TTL low when the Model 5/80 fails to produce the required high-voltage output such as during current limit.

Trip Status
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 high-voltage supply fault, or the removal of the top cover.

Fault Status
A BNC will provide a TTL low when the Model 5/80-HS is out of regulation for greater than 500 ms.

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

Features (cont.)

Scale Factor
1/1000th of the high-voltage output signal.

DC Accuracy
Better than 0.1% of full scale.

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 provides a low-voltage representation of the load current.

Scale Factor
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 34401A digital multimeter).

Bandwidth (-3db)
DC to greater than 10 kHz.

Output Impedance
47 Ω.

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 1.0 V rms (measured using the true rms feature of the Hewlett Packard Model 34401A digital multimeter).

Slew Rate (10% to 90%, typical)
Greater than 1000 V/µs.

Large Signal Bandwidth (-3dB)
DC to greater than 60 kHz.

Large Signal Bandwidth (1% distortion)
DC to greater than 50 kHz.

Small Signal Bandwidth (-3dB)
DC to greater than 75 kHz.

Settling Time (to 1%)
Less than 50 µs for a 0 to 5 kV step.

Performance (cont.)

Stability

Drift with Time
Less than 50 ppm/hr, noncumulative.

Drift with Temperature
Less than 200 ppm/°C.

Automatic Power Limit
Automatically limits the internal power dissipation to protect the Model 5/80 from overheating. The following graph illustrates the automatic power limit output capability.

General

Dimensions
279 mm H x 482 mm W x 654 mm D
(11" H x 19" W x 25.75" D).

Weight
24.9 kg (55 lb).

High-Voltage Output Connector
Alden high-voltage connector.

BNC Connectors
Amplifier Input
Voltage Monitor
Current Monitor
Remote High-Voltage On/Off
Out of Regulation Status
Fault/Trip Status connector

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.

AC Line Receptacle
Standard three-prong AC line connector.

CERTIFICATION

TREK, INC. certifies that each Model 5/80 is tested and calibrated to specifications using measurement equipment traceable to the National Institute of Standards and Technology or traceable to consensus standards. A Certificate of Calibration accompanies each instrument when it is shipped from the factory.

Low-Voltage Safety Compliance (EN 61010-1)
Installation Category
CAT II: Local level mains, appliances, portable equipment.
Pollution Category
Degree 1: Operate in environments where no pollution or only dry, nonconductive pollution occurs.

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

Products > Amplifiers > Greater than 5 kV