Fluke Biomedical TNT 12000 - Manual (Page 54)

TNT 12000
Users Manual
2-26
Dosimeter Measurements
When the Display and Dosimeter Detector are connected and the ion chamber parameters
are set, the MEASUREMENT screen shows in the Display.
fct238.png
Figure 2-15. Dosimeter Measurement Screen
Note
Average mA, mAs, and Dose/mA are only shown when the mAs Detector is
connected to the Display.
With the ion chamber set in the X-ray beam, make an exposure. The Display and
Dosimeter Detector beep when an exposure is sensed and the Display is updated with the
measured values.
The procedure for all subsequent measurements depends whether the Automatic Reset
feature is turned on or not. See the Measurement Mode Selection section to set this
feature. If Automatic Reset is on, make an exposure and the Detector resets itself. If
Automatic Reset is off:
1. Use B or A to highlight the Reset button and push E.
2. When the reset message is removed from the display, make an exposure.
The MEASUREMENT screen is refreshed with new values after the exposure.
Note
When the mode is set to Dose Rate, the display refreshes at one second
intervals. See the Measurement Mode Selection section to set the mode.
How to Add an Ion Chamber Definition or Cal Factor
You can add a maximum of nine ion chamber definitions to the Detector from the
Dosimeter MEASUREMENT screen, or the ION CHAMBER SETUP screen. Each ion
chamber can have a maximum of 10 cal factors.
To add an ion chamber definition:
1. Use B or A to highlight the IC button in the Dosimeter MEASUREMENT screen and
push E. The ION CHAMBER SETUP screen shows in the Display.