OUTPUT

Output Voltage Range
0 to ±2 kV DC or peak AC.

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

AMPLIFIER INPUT

Input Voltage Range
0 to ±2 V DC or peak AC.

Input Impedance

Noninverting
25 kΩ, nominal.

Inverting
50 kΩ, nominal.

Differential
50 kΩ, nominal.

PERFORMANCE

DC Voltage Gain

Noninverting Configuration
1000 V/V.

Inverting Configuration
-1000 V/V

Differential Configuration
Function of the difference between two input signals. Represented by the equation:
V out = V in(A) x (1000 V/V) + V in(B) x (-1000 V/V)

DC Voltage 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 300 V/µs.

Large Signal Bandwidth (1% distortion)
DC to greater than 10 kHz.

Small Signal Bandwidth (-3dB)
DC to greater than 40 kHz.

Settling Time (to 1%)
Less than 150 µs for a 2 kV step.

Stability

Drift with Time
Less than 100 ppm/hr, noncumulative.

Drift with Temperature
Less than 200 ppm/°C.

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.

Automatic Power Limit
Automatically limits the output power to protect the Model 623B from overheating due to excessive internal power dissipation. The following graph illustrates the Model 623B operating range automatic power limits.

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 623B.

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 2 to 40 mA.

Out Of Regulation Indicator
An amber indicator will illuminate when the Model 623B fails to produce the required high-voltage output such as during a current limit.

Trip Status
An amber 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 Ω.

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

• Scale
  0.25 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 than 10 kHz.
• Output Impedance
  47 Ω

GENERAL

Dimensions
134 mm H x 432 mm W x 439 mm D
(5.25" 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.

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.

CERTIFICATION

TREK, INC. certifies that each Model Model 623B 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 and are subject to change.