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Automatic paper expansion meter No.2078

Description

Dimensional changes when exposed to relative humidity fluctuations. The machine is able to provide various atmospheres of relative humidity where the specimen is subject to water content fluctuation, with a dial gauge showing expansion amount. Paper sheets, when affected by water, undergo dimensional changes. This factor is very important when using paper. Multi-color printing papers and map papers need to be highly stable in size even subject to water. This machine is designed to measure dimensional changes alongwith relative humidity fluctuation. There is a range of possibilities; the expansion of paper is detected and digitally displayed under various conditions, with various temperatures inside the system, atmospheres of various degrees of relative humidity, different water contents of specimen. In the case of the conventional measurement procedure, there is a dial gauge inside, so humidity sticks to the gauge shaft, causing precision problems. To solve this problem, the measurement section is positioned outside with a computer to automatically record temperature, humidity and expansion.




Spesification

Expansion measurement section:

Specimen up to 50 mm wide, 50, 100, 150, 200, 250, 300 mm long, six specimens mountable
Expansion 0 to 5 mm, 1/100 mm increment
Weights 5, 10, 20, 30, 50 g A weight of one-half the basis weight of 50 mm width
Measurement data dry-bulb and wet-bulb temperatures, 6-channel expansion meter with digital display

Constant temperature constant humidity oven:

Temperature range -200C to 1000C (depending on environment)
Humidity range 25 % RH to 95 % RH, see the separate table for detail.
Temperature variation +0.50C (except when step is switched and during gradient operation)
Humidity variation +3 %(except when step is switched and
during gradient operation)
Referential standards ISO 8226, J.TAPPI No.28, SCAN P-28
Power source three-phase 200/220 VAC 50/60 Hz 20 A
Inner dimensions 1000x600x700 mm
Outer dimensions 1600x1060x1515 mm
overall height including the measurement
section: about 2000 mm
Instrument weight 625 kg



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