Instruction Manual for MiniTRACE CSDF
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08/2012 Page 19
If you measure something other than a liquid the sample will need to be prepared. Solid food
must be mashed and the measuring cup filled precisely to the 0.6 l mark.
Note
: The calibration is only valid with the supplied measuring cup and holder.
Otherwise the result can be incorrect.
Measurement steps in detail:
Step 1: Determination of the background radiation (control measurement)
• Place the empty cup and the MiniTRACE CSDF in the measurement device.
• Go to the “Food” menu.
• MiniTRACE will start with the measurement of the background. The display will
indicate how long this measurement will take (in seconds). The result of the
background measurement will be given in the dose rate unit “µSv/h”. You can
interrupt this automatic measurement by pressing the mode button. On the display
the last measured value will be shown. If no value is available in the memory of the
MiniTRACE, you will get an error message (C ERR). In this case, you will need to
conduct a background measurement. We recommend not interrupting background
measurement if you have changed measurement location, or if the last background
measurement was conducted on the previous day.
• Background (Control) measurement takes about 2 hours (7,200 seconds) and is
important for the accuracy of the final result.
Figure 12: Display for background (control) measurement in the “Food” menu
• The end of the background (control) measurement is indicated by a 1 second beep.
On the display “C ok” is shown.
Figure 13: Result display for background (control) measurement in the “Food” menu
For further measurements the background (control) measurement is only required once at
the beginning. Do the background (control) measurement:
• If you change the location of the measurement.
• For measurements on another day.
C = Control
(background)
measurement
Value of the
background dose
rate in µSv/h
(here 0.13 µSv/h)
Remaining measure-
ment time in seconds
(2,700 sec = 45 min)
Result of the
background dose
rate in µSv/h
(here 0.06 µSv/h)
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