PTV MANUAL
14
118012-001 REV B
Chapter 6
M
AINTENANCE
his section describes periodic servicing and
performance testing procedures.
THIS POWER SUPPLY GENERATES VOLTAGES
THAT ARE DANGEROUS AND MAY BE FATAL .
OBSERVE EXTREME CAUTION WHEN
WORKING WITH HIGH VOLTAGE.
6.1 Periodic Servicing
Approximately once a year (more often in high dust
environments), disconnect the power to the unit and
remove the top cover. Use compressed air to blow dust
out of the inside of the unit. Avoid touching or handling
the high voltage assembly.
6.2 Performance Test
HIGH VOLTAGE IS DANGEROUS.
ONLY QUALIFIED PERSONNEL SHOULD
PERFORM THESE TESTS
.
High voltage test procedures are described in Bulletin
STP-783, Standard Test Procedures for High Voltage
Power Supplies. Copies can be obtained from the
Spellman Customer Service Department. Test equipment,
including an oscilloscope, a high impedance voltmeter,
and a high voltage divider such as the Spellman HVD-
100 or HVD-200, is needed for performance tests. All
test components must be rated for operating voltage.
6.3 High Voltage Dividers
High voltage dividers for precise measurements of output
voltage with an accuracy up to 0.1% are available from
Spellman. The HVD-100 is used for voltages up to
100KV. The HVD-200 measures up to 200KV. The
Spellman divider is designed for use with differential
voltmeters or high impedance digital voltmeters. The
high input impedance is ideal for measuring high voltage
low current sources, which would be overloaded by
traditional lower impedance dividers.
T
WARNING
WARNING
