Fluke Biomedical TNT 12000 - Manual (Page 43)

Operation
How to Use the Dosimeter Detector (TNT 12000 DoseMate)
2
2-15
How to Enter a Delay
When the Delay button is selected in the settings screen, the numeric entry screen shows
in the Display.
fct32.bmp
To enter a delay time:
1. Use A, B, C, and D to highlight a number button and push E to add the
number to the entry.
2. Highlight Save and push E to enter the delay value.
Highlight the Back button and push E to discard the entered value and return to the
last settings screen.
How to Use the Dosimeter Detector (TNT 12000 DoseMate)
The Dosimeter Detector measures ionizing radiation outputs of diagnostic X-ray systems.
You must connect an ion chamber to the Detector and put the ion chamber in the X-ray
beam for a Dosimeter measurement.
Note
A list of optional Dosimeter ion chambers are shown in the Optional
Accessories table in Chapter 1.
Preparation for a Dosimeter measurement involves:
1. Choose an ion chamber that best fits the measurement sensitivity
requirements.
2. Put the ion chamber in the X-ray beam.
3. Connect the ion chamber to the Dosimeter Detector.
4. Power on the Detector.
5. Define the ion chamber parameters in the TNT 12000.
6. Expose the ion chamber to X-rays.
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 operate at 300 V above
the outer shell.
Each ion chamber must have a definition in the TNT 12000. The Detector holds a
maximum of nine ion chamber definitions, each with a maximum of ten calibration
factors.
If at power up, no ion chamber is defined, highlight the Cancel button at the IC
NOTIFICATION screen and push E. Or if an ion chamber definition is already set,