Fluke Biomedical TNT 12000 - Manual (Page 44)

TNT 12000
Users Manual
2-16
highlight the IC button in the MEASUREMENT screen and push E. Go to the Ion
Chamber Selection and Setup section to set No Ion Chamber in the ION CHAMBER
SETUP screen.
Ion Chamber Selection and Setup
Choose an ion chamber for the measurement sensitivity requirements, X-ray beam
dimensions, beam-accessing port dimensions, and/or special function performance (e.g.
CT probe). After you pick an ion chamber, the subsequent step is to find a chamber
definition in the TNT 12000. If the definition is not found, make one.
Ion Chamber Connection and Placement
XW Warning
To prevent electric shock and damage to the ion chamber,
power off the Dosimeter Detector before you connect or
disconnect the ion chamber and triaxial cable. Although current
limited, the center pin and inner shield shell operates at 300 V
above the outer shell. High voltage is internally discharged
within a few seconds when the Detector is turned off.
W Caution
To prevent damage to the ion chamber, do not connect a BNC
type cable to the ion chamber input connector.
Note
Keep the Dosimeter Detector out of the radiation field. Only the ion
chamber must be exposed to the radiation.
To connect an ion chamber to the Dosimeter Detector:
1. Remove the dust cover from the ion chamber input connector.
2. Connect one end of the Triaxial ion chamber cable to the ion chamber connector as
shown in Figure 2-8.