DAK 900-EH Series, Руководство пользователя

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CAUTION FOR LIQUID DENSITY MEASUREMENT:
1) Do not use the liquid sample as to erode the machine body or spare parts.
2) Do not spill liquid sample on the machine body or spare parts.
3) Open the Airtight Wind Shield when measuring highly volatile liquid. Fullness of the gas may cause the
machine defect.
Special Measurement Cases:
1) To Measure A Floating Sample:
By using this method, it is possible to test the floating samples, such as urethane, timber, sponge etc.
The measurement process for this type of a sample is same as that of the Solid mode Measurement.
1. Turn ON the equipment make sure the display is 0.00g. Place the Metal Angle on the Measurement Tray in
water until it sinks, after placing it, the weight of this Angle will be displayed; tare this reading by pressing
the TARE key to return to 0.00g.
2. Now measure the Test sample in air, follow the Solid mode measurement procedure.
3. After measuring the aerial weight of the sample put the sample under the metal Angle in water. The sample
will float if its density is less than 1.000, but this Angle prevents it from floating and coming to the surface of
water. As the sample has buoyancy, the display will show the underwater gravity in minus, press the ENTER
key, and the measurement will be noted. The Sample density should be less than 1.000.
Incase the Metal Angle floats on water:
•Try and make the sample smaller.
•Attach a weight to the Metal Angle.
•Make the Metal Angle heavier.
2) How To Measure The Pellet
This method is used to measure the SG of pellet particles or certain Arenaceous samples.
Procedure:
1) Since this involves arenaceous samples, it is suggested to use a low surface tension liquid like ethanol instead of
Water.
•The surface tension of water prevents the sample from sinking this gives inaccurate results. Instead of water, we
recommend to use a solution of low surface tension such as
Ethanol
Caution: The Water Tank is made of Styrene resin hence we recommend to not use any solution, which can erode it.
2) To use an alternate liquid change the liquid type from Water to “Set as per SG” (procedure as mentioned on page
10 above)
3) Set the density value of this solution for the measurement (see page 19).
•If the density value of the solution is not certain, measure the liquid's density (see page 24).
4. Use 2 pcs. of 0 5cm (approx.) Petri dish for measurement.