SAPHYMO MiniTRACE CSDF - Figure 9: Counting up Measurement

Instruction Manual for MiniTRACE CSDF
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08/2012 Page 17
2.4.3.6 Count up mode
To work with this menu select “CNTUP” mode. For further details see Figure 3. This mode
is the summation of pulses at a predetermined time interval. The following time
intervals are available: 60, 120, 300, 600 (10 min.), 1800 (30 min.) and 3600 (60
min.) seconds. When you select the count up mode, the display will indicate which
measurement interval has been selected. To keep this measurement interval, wait
three seconds. To change the measurement interval, press the mode button. The
end of the measurement is indicated by an acoustic signal (beep).
Figure 9: Counting up measurement
This menu is very helpful in conveying to students an insight into the statistical correlations
between the radioactivity measurements.
2.4.3.7 Food measurement
The instrument is calibrated to measure Cs-137 contamination in liquid or solid food. The
results are only precise if the food is contaminated with Cs-137 and when determined using
the procedure described here.
For more information about radionuclides in food and limits for radiation in various products
see Chapter 2.4.2.
To check radioactivity in food, only two steps are necessary:
1. Determination of the background radiation (control measurement)
2. Food measurement
All measurements must be carried out with the lid closed.
Note: Due to limited sensitivity the instrument is not suitable for verifying official limits
for baby food. With any measurement errors, the manufacturer cannot be held
responsible for any damage.
Sum of the
pulses
Remaining
measurement
time