Hmm. It appears to be showing that the water/ice mixture is at -6C.
So then I stuck it in my freezer which is at -18C.
Hmm. It appears to be showing that the freezer is at -25C. So I stuck it in the fridge with a separate digital thermometer.
Hmm. Fridge appears to be at 7C and the thermometer is showing 1C. So, a final test at basement temperature (18C).
Hmm. Looks like about 13C.
So, here's the pattern:
Where | Expected | Measured | Difference |
---|---|---|---|
Iced water | 0 | -6 | 6 |
Freezer | -18 | -25 | 7 |
Fridge | 7.2 | 1 | 6.2 |
Basement | 18.4 | 13 | 5.4 |
3 comments:
You get the 6 deg difference based on the reading of the digital thermometer.
Is that one calibrated correctly (does it for instance show 0°C for melting ice?)
I used the digital thermometer for two of the measures, the fridge's own thermometer for the freezer and the temperature of iced water from memory.
This post reminds me of a visit to the observatory at greenwich a decade ago where they displayed a wall of poorly synchronised clocks that the geek in me was horrified to see.
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