Air Entrainment Meters
0.5 litre; model: TESTING 1.0334 0,75 litre; model: TESTING 1.0337
1 litre; model: TESTING 1.0335 5 litre; model: TESTING 2.0332
7 litre; model: TESTING 2.0337 8 litre; model: TESTING 2.0334
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• To calibrate the 5-litre TESTING air entrainment meter, you will need to take 250 g
of water as test volume from the water-filled meter. This corresponds to 5 % of the
total water content of the test pot (total filling = 5000 g of water, which is 5 litres
=5000 cm³).
• To calibrate the 7-litre TESTING air entrainment meter, you will need to take 350 g
of water as test volume from the water-filled meter. This corresponds to 5 % of the
total water content of the test pot (total filling = 7000 g of water, which is 7 litres
=7000 cm³).
• To calibrate the 8-litre TESTING air entrainment meter, you will need to take 400 g
of water from the water-filled meter. This corresponds to 5 % of the total water
content of the test pot (total filling = 8000 g of water, which is 8 litres = 8000 cm³)
For this step of work, you must know the exact volume capacity of the test pot. If you do
not know this volume, you can measure it as follows:
1. You can determine the exact capacity of the test pot by measuring the mass of water
that it contains.
2. First, weigh the test pot together with a transparent plate that covers the top surface
of the pot.
3. Then fill the pot up to the top with water at room temperature. Next, slide the
transparent plate over the top of the test pot.
4. Use the squeeze bottle to add water under the transparent plate until there are no air
bubbles remaining between the surface of the water and the transparent plate. The
test pot must be completely filled with water.
5. Wipe away the surplus water and weigh the test pot again, this time filled with water.
6. The difference between the results of these two weighing procedures is the volume of
the test pot in grams.
4.3.2 Continuation of the calibration
Now, after following the steps described above in Section 4.2, you have determined the
correct initial pressure, and the pressure gauge pointer lies at zero. After you have finished
the steps 1 to 6 above, now proceed as follows:
7. Screw the tube, with a diameter of 4 mm (supplied with the calibration kit) to the left
ball shut-off valve (A).
8. Hold this tube down into a graduated measuring cylinder (with volume at least 50 ml
for the 0.5-litre meter, with volume at least 75 ml for the 0.75-litre meter, with volume
at least 100 ml for the 1-litre meter, at least 250 ml for the 5-litre meter, at least 350
