CMA Dishmachines CLAB DATA-LOGGER 003, User Manual

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C LAB User’s Guide | 23
sensors be left to soak in acids of between 1 - 3 M concentration for longer
than 48 hours. The exceptions to this are Hydrochloric acid HCL and Sulphuric
acid H
2
SO
4
. The maximum exposure time for these acids are:
Acid Maximum
Exposure Time
1 M HCL
2 M HCL
3 M HCL 20 minutes
10 minutes
5 minutes
1 M H
2
SO
4
2 M H
2
SO
4
3 M H
2
SO
4
48 hours
20 minutes
10 minutes
2. Suggested experiments
The Temperature sensor can be used in many experiments like:
•
Monitoring indoor and outdoor temperatures.
•
Monitoring freezing and boiling water.
•
Monitoring endothermic and exothermic reactions.
•
Specific heat experiments.
•
Insulation investigations.
•
Solar energy studies.
3. Technical data
Temperature range
-40
°
C .. 140
°
C
Measuring element
20 k
Ω
NTC Thermistor; non-linear
Calibration
(Steinhart-Hart equation)
Coefficients
T = [K
0
+ K
1
*ln(R) + K
2
* (ln(R))
3
]
-1
Where T the temperature in
°
C, and
R the measured resistance in
Ω
K
0
= 1.02119E-03; K
1
= 2.22468E-04; K
2
= 1.33342E-07
Maximum temperature that sensor
can tolerate without damage
150
°
C
Accuracy
±
2
°
C at -40
°
C
±
0.6 at 30
°
C
±
1.8
°
C at 140
°
C
Response time
(time for 90% change in reading)
10 seconds (in water with stirring)
270 seconds (in still air)
80 seconds (in moving air)