M70706
PHOTOMULTIPLIER POWER SUPPLY
9
5.2
EXTERNAL CONTROL
•
DO NOT CONNECT A PMT TO A POWER SUPPLY WHEN THE SUPPLY IS SWITCHED
ON!!
•
Make sure that the Remote Enable switch on the back panel is switched to
Remote.
•
Enable/Disable Switch
The high voltage output from the power supply can be switched on or off from an external
source; this is termed disabling the supply.
A simple micro-switch can be used to control the operation of the power supply.
When there is an open circuit between the two input banana jack terminals on the back panel,
the power supply is disabled; when there is a short circuit, the power supply is enabled.
•
Computer Control of Enable/Disable Switch
The power supply can be controlled by a computer with a TTL interface.
TTL high will disable the power supply and TTL low will enable the power supply.
•
External Voltage Control
A computer with a DIA interface can be used to adjust the output voltage for programmed
control.
Make sure that the Output Voltage Control switch on the back panel is switched to
Remote.
The high voltage output from the power supply can be adjusted from an external source. A 0 to
9 volt DC signal applied to the input banana jack terminals on the back panel will control the
output voltage from 0 to -2000 volts. The control voltage to output high voltage ratio is not
precisely 9:2000.
The minimum guaranteed high voltage is 200V at 0V input and the maximum is 2000V at 9V
input, although the actual output voltage may exceed this range. The voltage reading will be
shown on the LED display.
CHECK THE MAXIMUM VOLTAGE RATING FOR YOUR PMT!!
