3B SCIENTIFIC U192001, Инструкция

Страница: 11 / 16

11
Development Developer Fixer
Time 1½ min. 4 min.
Filmpack 2 2½ ml 3½ ml
Filmpack 4 3½ ml 5 ml
9.7.2 Removing the film
•
After the film has been developed, snip off one
corner of the wrapper with scissors and apply
slight pressure to force all the liquid out of the
wrapper.
•
Then snip off one edge of the wrapper and use a
metal clip to pull the film out.
•
Wash the film for a few minutes in running wa-
ter before viewing.
If the film is to be archived, it will require another 10
minutes of fixing and 30 minutes more washing in
running water. Normal fixer with or without harden-
ers can be used for this.
9.7.3 Storage of chemicals
Whereas fixer is relatively stable, the developer can
decompose as a result of air in the bottle.
•
If developer needs to be kept for a long time
though the bottle is already partially empty, it is
better if it is transferred to a smaller con
tainer. This means it remains usable for longer.
•
Before closing the developer bottle, squeeze the
bottle so that the fluid comes to brim before
closing it. This ensures that as little air as possi-
ble remains above the fluid in the bottle.
•
Observe local regulations when disposing of
chemicals.
9.7.4 General information
When exposing X-ray film, the distance of the film
from the object should be kept as small as possible
and the distance of the film from the radiation
source as large as possible for the required exposure
time and size of radiation source.
The film can also undergo exposure from beta and
gamma radiation emitted from low energy sources
that may be present in a school.
If the film is irradiated with a relatively large quan-
tity of "soft" X-ray radiation, the pattern of the wrap-
per may appear on the developed image.
When the film is sealed into its PVC wrapper, pres-
sure points sometimes appear at the edges. After
development these pressure points may appear as
dark black patches.
10 Troubleshooting
Fault Possible causes Solutions
Mains indicator light is not work-
ing even though the mains con-
nection has been checked.
Timer is set to 0
Mains fuse has blown
High voltage fuse has blown
Indicator bulb has blown
Other causes
Set a short timer period.
Replace the fuse (see Section 8.3).
Replace the fuse (see Section 8.3).
Replace the bulb (see Section 8.4).
The equipment needs to be
checked by the manufacturer.
Cathode heater fails to glow,
although the high voltage is
switched on, the preselected tube
current is greater than zero, and
the mains voltage indicator lamp
shows “ON”
Cathode is faulty
Heater control circuit is faulty
The equipment needs to be
checked by the manufacturer.