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Products: High Voltage Amplifiers

Trek Model 609E-6 DC-Stable High-Voltage Amplifier

The Trek Model 609E-6 high-voltage DC-stable power amplifier is designed to provide precise control of bi-polar output voltages in the range of 0 to ±4 kV DC or peak AC with an output current capability of ±20 mA DC or peak AC. The Model 609E-6 can be configured as a noninverting amplifier with a fixed gain of 1000 V/V, or as an inverting or differential amplifier.

Applications for the Model 609E-6 include AC and DC biasing of electrophotographic charging rollers, electrorheological fluid research, and dielectric material characterization. Features include an all-solid-state design, a slew rate greater than 150 V/µs, a large signal-bandwidth of greater than 6 kHz, 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 technique is essential for achieving the accurate output responses and high slew rates demanded by reactive loads.

The Model 609E-6 features a current trip or limit that is adjustable for 0 to 20 mA using the Current Trip/Limit Adjust potentiometer on the front panel. When the Model 609E-6 enters a current trip condition, the high-voltage output is disabled, the Trip Status indicator will illuminate and the Trip Monitor output will provide a TTL low.

The Model 609E-6 is protected against over-voltage and over-current conditions that may be generated by active loads or by output short circuits to ground. Precision voltage and current monitors provide low-voltage output signals for monitoring purposes or for use as a feedback signal in closed-loop control systems. This makes the 609E-6 suited for automated or computer controlled systems.

A Digital Enable feature provides a connection for a remote device to turn the high voltage on and off.

The 609E-6 can also be operated on a bench top or, with optional hardware, in a standard 19-inch rack.

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PERFORMANCE

  • DC Voltage Amplifier Gain Noninverting (A) Configuration
    1000 V/V.
  • DC Voltage Amplifier Gain Inverting (B) Configuration
    -1000 V/V.
  • DC Voltage Gain Differential Configuration
    Function of the difference between two input signals. Represented by the equation:
  • V out = 1000 [V in (A) - V in (B)]
  • DC Voltage Amplifier Gain Accuracy
    Better than 0.1% of full scale.
  • Offset Voltage
    Less than ±1 V.
  • Output Noise
    Less than 80 mV rms (measured using the true rms feature of the Hewlett Packard Model 34401A digital multimeter).
  • Slew Rate (10% to 90%, typical)
    Greater than 150 V/µs.
  • Large Signal Bandwidth (1% distortion)
    DC to greater than 6 kHz.
  • Small Signal Bandwidth (-3dB)
    DC to greater than 35 kHz.
  • Settling Time (to 1%)
    Less than 150 µs for a 4 kV step.
  • Stability
    • Drift with Time
      Less than 100 ppm/hr, noncumulative.
    • Drift with Temperature
      Less than 200 ppm/°C.
  • Automatic Power Limit
    Automatically limits the internal power dissipation to protect the Model 609E-6 from overheating. The following graph illustrates the automatic power limit.
  • Model 609E-6 Output Operating Range

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PRODUCT FEATURES

  • Amplifier Input
    Three pin input connector that can be configured for inverting, noninverting, or differential amplification.
  • Digital Enable
    An input providing a connection for a TTL compatible signal to turn on and off the high-voltage output. A TTL high (or open) turns off the high-voltage output. A TTL low turns on the high-voltage output.
  • Response Adjust
    A graduated one-turn potentiometer used to optimize the AC response of the Model 609E-6 under various load parameters.
  • Trip/Limit
    Switch selectable for either Current Trip mode or Current Limit mode. A graduated one-turn potentiometer is used to adjust the current trip/limit value from 0 to 20 mA.
  • Out Of Regulation Indicator
    An indicator will illuminate when the Model 609E-6 fails to produce the required high-voltage output such as during a current limit.
  • Trip Status
    An indicator will illuminate and the Trip Monitor BNC connector will provide a TTL low when the high-voltage output is disabled due to the output current exceeding the current trip level.
  • 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.
    • Offset Voltage
      Less than ±2.5 mV.
    • Output Noise
      Less than 2 mV rms (measured using the true rms feature of the Hewlett Packard Model 34401A digital multimeter).
    • Output Impedance
      0.1 ohm.
  • Current Monitor
    A buffered output providing a low-voltage representation of the load current.
    • Scale
      0.5 V/mA.
    • DC Accuracy
      Better than 0.5 % of full scale.
    • Offset Voltage
      Less than ±5 mV.
    • Output Noise
      Less than 10 mV rms (measured using the true rms feature of the Hewlett Packard Model 34401A digital multimeter).
    • Bandwidth (-3db)
      DC to greater than10 kHz.
    • Output Impedance
      47 ohms.

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OUTPUT

  • Output Voltage Range
    0 to ±4 kV DC or peak AC.
  • Output Current Range
    0 to ±20 mA DC or peak AC. (See Automatic Power Limit feature for limitations.)

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AMPLIFIER INPUT

  • Input Voltage Range
    0 to ±4 V DC or peak AC.
  • Noniverting Input Impedance
    25 kohm, nominal.
  • Inverting Input Impedance
    50 kohm, nominal.
  • Differential Input Impedance
    50 kohm, nominal.

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ACCESSORIES

  • Accessories Supplied
    • Operator’s manual, Amphenol 3-pin mating connector with 3 meters of cable, Alden 3 meters (10 ft) high-voltage output cable assembly, and line cord.

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GENERAL

  • Power Requirements
    • Line Voltage
      Factory set for one of two ranges:
      90 to 127 V AC or 180 to 250 V AC, at 48 to 63 Hz. (Specify when ordering.)
    • Power Consumption
      220 VA, maximum.
  • Operating Conditions
    • Temperature
      0 °C to 40 °C.
    • Relative Humidity
      To 85%, noncondensing.
  • Dimensions
    140 mm H x 432 mm W x 439 mm D
    (5.5" H x 17" W x 17.25" D).
    • Weight
      13.2 kg (29 lb).
  • High-Voltage Output Connector
    Alden high-voltage connector.
  • Amplifier Input
    Amphenol panel mount.
  • Voltage Monitor Connector
    BNC connector.
  • Current Monitor Connector
    BNC connector.
  • Digital Enable Connector
    BNC connector.
  • Trip/Limit Connector
    BNC connector.
  • AC Line Receptacle
    Standard IEC three-prong AC line connector with integral fuse holder.

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CERTIFICATION

TREK, INC. certifies that each Model 609E-6 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
    • 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.

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