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MODEL 3602

Triple output power supply: −0.5 to 30 kV @ 300 μA, 0 to +5 V @ 0 to 3 A, 0 to −2 V @ 200 μA

  • Three outputs: −30 kV 250 μA, floating −1 kV 25 μA and 5 VDC 5 A
  • Compact enclosure
  • Interlock input and status LEDs
  • Federal Standard output connector
  • RS-232 remote control
  • Demo program with source code
  • Ideal for electron microscopes and similar applications

Model 3602 contains three common power supplies used by scanning electron microscopes within a compact 25 × 15 × 20 cm enclosure. The filament and Wehnelt voltages float on the accelerator voltage. All three are remotely programmable via an RS-232 or USB data port. Connection to a SEM is through a conventional 3-pin Federal Standard connector. A plug-in terminal block connects 24 VDC input power, an external safety interlock, and a HV On status bit.

Two status lights show serial communication activity and a heartbeat lamp indicates the processor of the 3602 is active.

The Wehnelt voltage is derived from the accelerator supply and controlled by an electronically programmable Wehnelt resistor.

A C-language demo program allows control over all supplies and reports communication activity. It displays the set-point of each supply and the actual measured outputs. An internal temperature sensor is also displayed.

NOTE: CPS has replaced the 3602 with Model 3603.

Acceleration Voltage
Output voltage range−500 VDC to −30 kVDC
Output current−300 μA
Output ripple & noise< 300 mV
Output temperature drift10 ppm/hour
Programmable step size1 ppm
Output voltage range0 to −2 kVDC
Equivalent resistance1 kΩ to 10 MΩ
Output current200 μA
Programmable step size256 steps
Stability50 ppm/hour
Ripple and noise< 100 mV
Output voltage0 to 5 VDC
Output current0 to 3 A
Output ripple< 100 mV
Output temperature drift100 ppm/hour
Programmable resolution1 ppm
ConnectorDB9 male
Signal levelsRS-232 or USB with special cable
Bit rate57 kbit/sec
Isolation1 kVDC maximum
SchematicsBlock diagram of Model 3602
Input power24 VDC ± 1.5 V, 3 A
Operating temperature range10 to 35 °C
Interlock circuitClosed contact enables HV
Dimensions10.0 × 7.5 × 4.5 in. (254 × 190 × 114 mm)
Weight11 lb (5 kg)
Output connector3-pin CA1-type Claymount
Input terminal blockRequires 6-pin Phoenix Contact 1803617
Temperature monitorInside floating HV section
Model Description Price Order Qty.
1 2–9
3602 Triple output power supply: −0.5 to 30 kV @ 300 μA, 0 to +5 V @ 0 to 3 A, 0 to −2 V @ 200 μA $3,800 $3,455 Call