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RUSKA 7750i
Users Manual
6-2
3. Press ELECTRICAL [F1]. The electronics self test will run and display the results.
The electronics test runs eight sets of tests on various parts of the electronic modules.
Table 6-1 describes these tests and the possible actions needed if a test fails.
Table 6-1. Electronics Self Test
Test Description Action on failure
Processor Tests the processor chip. Replace processor board.
Clock Tests the real time clock. Replace processor board.
High Tests the Ps sensor. Contact factory.
Low Tests the Qc sensor. Contact factory.
Control Tests the Ps & Qc controller boards. Contact factory.
Removing the ADTS’s Cover
The ADTS should be kept clean and completely assembled at all times. Operating the
ADTS without its cover affects the ADTS’s thermal gradients and therefore may reduce
precision. If it becomes necessary to remove the ADTS’s cover, follow the instructions
below.
WX
Warning
The ADTS should only be opened by qualified
electrical/mechanical service technicians. Lethal voltages are
present and exposed in the power supply and display.
1. Turn off the ADTS and disconnect the power cord from the ADTS.
2. Locate and unscrew the four screws that secure the cover to the back panel.
3. Place your hands near the middle of the cover and slide the cover towards the
ADTS’s back panel.
4. Lift up on the cover. With the cover removed, use typical electronic cleaning tools to
remove any accumulated dust from inside the instrument.
5. Replace the cover before resuming operation.
Particle Filters
Refer to Appendix A for air supply quality requirements. During normal operation, the
ADTS transfers gas both into and out of the device under test (DUT). When necessary,
the user is expected to use and maintain an in-line disposable particle filter to protect the
ADTS’s pneumatics from any contamination that may exist in the DUT.
Vacuum Pumps
Periodic checks of the user’s vacuum pumps for oil levels. It is very highly recommended
that a power-down vacuum-venting valve is installed onto the vacuum pump to ensure
minimal chances of oil contamination from the vacuum sources. These are normally open
solenoid valves that are powered through the vacuum pump power switch. When the
vacuum pump is turned on, the solenoid valve is energized and closes allowing the pump
to operate normally. When the pump is turned off, power is removed from the solenoid
and the vacuum is vented to atmosphere. Periodic changing of vacuum pump oil should
also be done as recommended by the vacuum pump manufacturer.