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DC Series

DC Series

Fast Polarity Switching PSU

Application: Quadrupole and Ion Trap mass spectrometers using electron multiplier or photomultiplier detectors

  • Configurable 2 or 3 outputs
  • Up to ±15kV dynode output with Dynamic Control TM fast polarity switching up to 10mS (for ±5kV)
  • Remote programming, voltage and current monitor & true zero volt crossing with full linear control
  • Remote voltage programming
  • 2 package formats. Flashover & short circuit protected

This range of high performance high voltage power supplies has been specifically designed for mass spectrometer multi-stage detector applications requiring a fast polarity switching conversion dynode and fast settling electron multiplier output. The DC series complements our range of fast polarity switching source (SC series) power supplies and the use of Dynamic Control TM technology within the output stages ensures fast and accurate settling after polarity change with minimal overshoot. For custom / volume applications please contact us for details.

dc_diagram

Electrical Specification
Input +24V dc ±10% <1A. 0V input common to HV return and chassis.
Control of output (output 1 only) 0 to ±5V for 0 to 100% rated output voltage, input Z = 1M, polarity follows the control polarity.
Control of output (outputs 2 & 3) 0 to +5V for 0 to 100% rated output voltage, input Z = 1M.
Voltage monitor (all outputs) Zero to +5V for zero to 100% rated output voltage, ±2% (source Z= 10k)
Protection (all outputs) All outputs are protected against intermittent arcing and continued short circuit to ground.
Outputs 1 & 2 only
Output 1 voltage / polarity
(Conversion dynode output)
Up to ±15kV / *Reversible, maximum 1kV / mS with settling to 90% of target, this can be limited to a slower speed if required (up to ±10kV is available in the smaller package size).
Output 2 voltage / polarity
(Phosphor or EM output)
Up to 10kV / Fixed, “N” denotes negative and “P” denotes positive (position “Y” in part number), maximum 1kV / mS with settling to 90% of target, this can be limited to a slower speed if required.
Output current 5μA
Output ripple 500ppm pk / pk
Line regulation <0.1% for 10% change in input voltage.
Load regulation <0.1% for 20% to maximum load.
Temperature coefficient <200 ppm / ºC
Drift (after 1 hour warm up) <0.01% per hour, <0.05 over an 8 hour period.
Output 3 only
Output voltage / polarity Up to 3kV / Fixed, “N” denotes negative and “P” denotes positive (position “Z” in part number)
Output current 0.5mA (higher output current may be available at lower voltages, maximum power is 3W)
Output ripple <3ppm pk / pk
Line regulation <20ppm for 10% change in input voltage
Load regulation <20ppm for zero to maximum load
Temperature coefficient <50 ppm / ºC
Drift (after 1 hour warm up) <15ppm in any 15 minute period, <50ppm in any any 8 hour period
Current monitor (output 3 only) Zero to +5V for zero to 100% rated output current, ±5% (source Z= 10k)
Environmental Specification
Temperature, storage -10 to +80ºC
Temperature, operating 0 to +45ºC
Pollution category II
Humidity (RH) 80% maximum non-condensing
Mechanical Specification
2 output (max V for o/p 1 = 10kV) only types
Dimensions 175.5 x 107.1 x 50 mm (7” x 2.25” x 2”)
Weight 2.5Kg (5.5 lb) approximately
Input / control 25way “D” connector
Output 1 Flying lead, red UL3239 un-screened 30kV cable 0.5m long. HV return to case fixings
Output 2 1 off MHV BNC connector
2 or 3 output types
Dimensions 216 x 203 x 86 mm (8.5” x 8” x 3.375”)
Weight 3.5Kg (7.75 lb) approximately
Input / control 15way “D” connector
Output 1 Flying lead, red UL3239 un-screened 30kV cable 0.5m long. HV
return to case fixings.
Output 2 2 flying leads, URM76 screened cable 0.5m long. HV return to
screen or case fixings.