Model 7640 Photomultiplier Detector Power Supply Stable high voltage (HV) power supply 0.002% regulation Available in 1, 2 and 5-kV versions Precision 10-turn potentiometer adjustment Analog input for remote control

The Model 7640 series of power supplies is comprised of 3 units with maximum output of 1000 V, 2000 V or 5000 V. It is useful for work with our photomultiplier tube and channel electron multiplier detector assemblies. For a channel electron multiplier see Model 425, for end on PMTs see Model 650 or 658. For PMT assemblies for side on tubes see Model 654.

High Voltage Power Supply Specifications

Model Number	Output Voltage*	Output Current	Ripple, P-P
7640	1,000-V	0 to 4-mA	2-mV
7641	2,000-V	0 to 2-mA	4-mV
7642	5,000-V	0 to 0.5-mA	10-mV

* Output voltage is negative polarity, poitive may be specified at time of order

The Model 7640 is highly regulated and designed for use with photomultiplier tube or channel electron multiplier type detectors, or other devices, requiring a stable source of high voltage. Voltage can be set with the precision 10-turn lockable potentiometer or remotely, via scaled 0 - 9 V input or RS-232 on some models (please inquire).

All models feature 6' line cord and power connector (factory configured for 110 or 220 operation), power switch, LCD display of HV setting, remote or local mode switch, HV output connector, and auxiliary / remote connector.

High Voltage Power Supply Specifications

Regulation	<0.002% per 1%line
Load	<0.001% for NF-FL or FI-NL
Stability	<0.005% per hour, 0.02% per 8-hours
Power Requirement	110-V or 220-V operation with 0.25 and 0.125-Amp fuses respectively

Part Numbers for Model 7640

Part Number	Description
8181-3353-0	Model 7640 power supply for PMT, continuously adjustable from zero to 1000-V maximum output.
8181-3353-1	Model 7641 power supply for PMT, continuously adjustable from zero to 2000-V maximum output.
8181-3353-2	Model 7642 power supply for PMT, continuously adjustable from zero to 5000-V maximum output.

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