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3.5kV Floating Microchannel Plate Power Supplies for Mass Spectrometers at Up to 30kV Isolation
Applications:
- Microchannel plates for
- Mass Spectrometers
- Electron Microscopes
- Floating grid voltages
- Floating bias voltages
- NEW Low Injected Ripple Version
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These power supplies, based on the standard HP series are intended to power imaging detectors. They give 0 to +3.5kV and can be floated on voltages up to ±2.5kV (HP3F2.5), ±10kV (HP3F10), ±20kV (HP3F20) & ±30kV (HP3F30) and use differential feedback techniques to allow the 24 volt power, control and monitor signals to be at ground potential.
Change to HP3F series;
The Internal Potentiometer and Reference, necessary when using internal or external potentiometer Control, are now only fitted as an optional extra. Please request 'Plus Ref' on order.
Ordering information: State unit required e.g. HP3F10L (3.5 kV output floating up to 10 kV with low injected ripple option)
Electrical Specification
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UNIT TYPE
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OUTPUT
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ISOLATION
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OUTPUT RIPPLE |
INJECTED RIPPLE (1) |
NEW Low Injected Ripple Option
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| HP3F2.5(L) |
0+3.5kV
at 1 ma |
±2.5kV (2) |
50mV peak to peak |
50mV peak to peak |
25mV - L option |
| HP3F10(L) |
0+3.5kV
at 1 ma |
±10kV (3) |
75mV peak to peak |
75mV peak to peak |
35mV - L option |
| HP3F20(L) |
0+3.5kV
at 1 ma |
±20kV (3) |
100mV peak to peak |
150mV peak to peak |
75mV - L option |
| HP3F30 |
0+3.5kV
at 1 ma |
±30kV (3) |
150mV peak to peak |
200mV peak to peak |
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(1) ripple injected into the power supply providing the floating voltage, measured assuming load capacitance of 1000°F.
(2) resistance to ground 400 Mohm on each output.
(3) resistance to ground 600 Mohm on each output.
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INPUT VOLTAGE:
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+24 volt at 0.7 amp at 20 mA
(HP3F10 & HP3F20).. |
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OUTPUT VOLTAGE:
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See table above. |
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CONTROL:
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10V analog signal. (0 to +10V gives zero to maximum output, tolerance ±3%). Input impedance > 100Kohm. INTERNAL or EXTERNAL potentiometer. Option - quote +Ref with Order. |
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LINE REGULATION:
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Less than 0.1%. |
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LOAD REGULATION:
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Less than 0.1%. |
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VOLTAGE MONITOR:
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0 to +10V ±3% represents 0 to +3.5kV.
Source resistance 10 kohm. |
| DRIFT: |
Typically 0.1% of full scale voltage per hour, measured at constant input voltage, output voltage, load, polarity & ambient temperature after 1 hour's warm up. |
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TEMPERATURE COEFFICIENT:
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Less than 0.02% per °C. |
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OPERATING TEMPERATURE:
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0°C to +50°C. |
Mechanical Specification
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Size:
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200 x 98 x 47mm (standard HP10P case).
HP3F10, HP3F20 & HP3F30: 210 x 120 x 60mm. |
| INPUT: |
Molex connector. (24V power, control and monitor are all at ground potential). |
| FLOATING OUTPUT: |
By twin flying screened (shielded) leads type URM43 (HP3F2.5 & HP3F10), TV30 (HP3F20/30). |
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