3B SCIENTIFIC U192001, Инструкция

Страница: 12 / 16

12
High voltage indicator light is not
working even though the mains
indicator is on
Safety circuit
Indicator bulb has blown
Other causes
Check the safety circuit as specified
in Section 8.1, especially the fas-
tening of the leaded glass dome
and the hinges and locking of the
cover.
Replace the bulb (see Section 8.4).
The equipment needs to be
checked by the manufacturer.
High voltage "crackles" shortly
after switching on
Moisture under the leaded glass
dome
Unlock and remove the lead glass
dome, wipe it with a dry cloth, and
replace it and lock it.
The cathode lights up brightly for
a short time after the high volt-
age has been switched off („After-
flash“)
This is not a fault, its purpose is to
allow discharging of the high-
voltage components.
No X-ray beam although the high
voltage is turned on
The cathode is not lit
The emitter current is too small
No emitter current
Collimators or such like in the way
of the beam
X-ray tube has lost its adjustment
The equipment needs to be
checked by the manufacturer.
Caution: high voltage remains in
effect for several hours after the
tube has been switched off!
Adjust the emitter current (see
Section 8.2.4)
The equipment needs to be
checked by the manufacturer.
Check the set-up for the experi-
ment
Adjust the X-ray tube (see Section
8.5)