| Dimensions (mm) | Mass (g) | Note |
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Small | 25×50×100 | 125 | In the geometrical center of 5oog |
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Middle | 50×100×100 | 500 | pack, there is a thermal element; |
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Big | 50×100×200 | 1000 | this pack is called M pack. |
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The contents of test packs are (take 1000g pack as the datum): hydroxyethlmethylcellulose 230g; water 764.2g; sodium chloride 5g; parachlorometacresol 0.8g. The freezing point of filling of pack is
(5)Temperature measuring gauge: The measuring of temperature normally use platinum resistor. There are two types:
Put the platinum resistor directly into test pack (M pack) when measuring
a. Its temperature;
b.Insert the platinum resistor into the center of four tin electroplated copper columns, the diameter and height of column is the same 15.2mm.
The measuring equipment is
MAINTENANCE SERVICE AND TROUBLE SHOOTING
Maintenance Service and Trouble Shooting
(6)Humidity measuring instrument: the measurement of relative humidity is wet and dry bulb method. Put the dry bulb thermometer and wet bulb thermometer (enclose
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