Features

• Two independent high voltage power supplies
• Compact single width NIM
• Regulated 0 to ±5000 V dc, 0 to 300 µA output
• Voltage limit protection
• Polarity indication with preview
• Overload and short circuit protected
• Front panel meters
• Remote control capability

Description

The CANBERRA Model 3125 is a compact dual NIM high voltage power supply accommodating all types of detectors requiring up to 5 kV bias and up to 300 µA of current. Its low noise and excellent stability make it well suited for high resolution detector systems.

The 3125 will withstand overload or direct output short-circuit for an indefinite period and provide normal output after the fault is removed. Each supply is continuously adjustable over the full range from 0 to ±5000 V. With the application of an external input dc level or logic signal, the output voltage can be controlled over its full range or gated off, respectively. Front panel meters monitor the output voltage of each supply.

An internal jumper plug can be set limiting the maximum output voltage to ±2000 V dc. For photomultiplier applications, this feature guards against inadvertent application of higher voltages which can result in permanent tube damage.

A polarity selector plug provides selection of positive or negative output polarity. To prevent inadvertent polarity reversal, the polarity selector plug is located inside the module. In addition, the polarity status is indicated by illumination of a front panel LED which can be previewed prior to activation of the power supply.