Farmer Chamber
Ionization Chamber
Type 30010, 30011, 30012, 30013
Operating Manual - Application
16
D596.131.00/05 en
Application in Water
The detectors are not waterproof.
NOTICE
Do not use the detectors in water. Using them
in water is not intended and may cause dam-
age to the detectors and to the electrometer
and may lead to dangerous short-circuits.
The Farmer chamber, type 30013, is waterproof.
NOTICE
To avoid damage to the detector, observe the
following points:
The detectors are allowed to remain immersed
in water without interruption for a maximum of
12 hours.
After use, remove the detectors from the water
and dry them thoroughly.
When attaching the build-up cap, make sure
that there is no water between the detector and
the cap.
Guard Ring
The guard ring of the detector is designed up to
the sensitive volume. The potential of the guard
ring is equivalent to the potential of the central
electrode. When the detector is properly con-
nected, high voltage is not applied to any of the
exposed components.
1.3
Special Application
Considerations
NOTICE
Use only accessories, such as positioner,
adapter, chamber plate, or check device,
approved by PTW for the different applica-
tions; refer to section
.
Application with the Radioactive Check
Device
Proceed as follows:
•
Unscrew the build-up cap from the detector.
•
Introduce the detector holder T48002.3.003
into the chamber well of the check device all
the way.
•
Carefully introduce the detector into the holder
all the way. Line up the marks on the chamber
stem and on the holder.
•
When the detectors are not in use: Screw the
build-up cap onto the detector housing.
