Data Harvest EasySense Q 3 Manuale - Pagina 17

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The software version number
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A description of the problem being encountered
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If possible, telephone from a location where you can operate EasySense Q with
computer.

Practical information for the plug-in Temperature Sensor

It is the tip of the sensor that is sensitive to temperature. Lay the sensor on its side,
#
not its end, when measuring a surface temperature.
Temperatures higher than 150ºC may damage the sensor.
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The PVC insulation on the connecting cable has a working range of -10 to 85ºC, so
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keep this cable away from the source of heat e.g. by clamping the sensor in position.
Do NOT put any part of the sensor in a direct flame or on a hot plate.
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Avoid submerging the sensor beyond the stainless steel portion.
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Wash the sensor thoroughly after use.
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The boiling point of water will vary with changes in air pressure. At one atmosphere of
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pressure (101.3kPa, 1013mBar) pure water boils at 100ºC. Water boils when the
vapour pressure of water equals the pressure of the gases above water, so if the
pressure changes, then the temperature that the water boils at will also change.
Boiling Point of Water vs. Pressure
Temperature in
Pressure in kPA
Pressure in mBar
AISI 316 stainless steel has a high resistance to corrosion from a wide variety of
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weak acids and alkalis. Some environments e.g. saltwater may cause some
discolouration to the stainless steel tube but this will have no effect on the sensor's
performance. The sensor can be left in an alkaline solution such as Sodium
Hydroxide (NaOH) for up to 48 hours, with only minor discolouration. We do not
recommend use in a solution whose concentration is greater than 3M.
The maximum length of time recommended for exposure to an acid is dependent on
the acid's concentration. In general, we do not recommend that temperature sensors
be left to soak in acids of between 1 - 3M concentration for longer than 48 hours. The
exceptions to this rule are Hydrochloric acid (HCl), and Sulphuric Acid (H
maximum recommended times for exposure are:
1M HCl
2M HCl
3M HCl
Suggested Investigations:
Monitoring indoor and outdoor temperature. Weather studies. Insulation studies.
Monitoring endothermic and exothermic reactions. Solubility of salts. Studying freezing
and boiling points. Cooling rates. Evaporation, radiation, conduction and convection
investigations.
C
100.0
99.5
0
101.3
99.5
1013
995
20 minutes
10 minutes
5 minutes
17
99.0
98.5
98.0
97.5
97.8
96.0
94.4
92.7
978
960
944
927
48 hours
1M H
SO
2
4
2M H
SO
20 minutes
2
4
3M H
SO
10 minutes
2
4
the
SO
). The
2
4