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
Page 19 of 42 pages
Caution
When the quick-release latches are not yet snapped into locking
position, but when the hooks of the clamps are already fastened into
the lower part of the air entrainment meter, the clamps should rest at
an angle of about 45° to the vertical wall of the air entrainment
meter. If the tension before snapping into place is too great (i.e., the
clamps are > 45°), this will damage the clamping ring. If the tension
is not great enough (i.e., the clamps are < 45°), the clamps will not
provide enough force to tightly seal the two parts of the air
entrainment meter together.
pointing upward.
6. Use the squeeze bottle to fill water into the left ball shut-off valve (A) until all the air
has escaped from the air entrainment meter through the right ball shut-off valve (B)
on the opposite side. To make sure that all air has escaped from the device, tilt the air
entrainment meter to the left until the right ball shut-off valve is pointing vertically (see
Section 7. Calibration instructions, picture no. 6).
Important
: it is absolutely
necessary that you let the water flow out of the right ball shut-off valve
until it no
longer contains bubbles
. To ensure that the water contains no more bubbles, it is
essential that the water continuously flows through the air entrainment meter.
7. Now close both of the ball shut-off valves (A and B).
8. Turn the ball-headed knob to the left to release (unlock) the pump piston rod of the
hand pump. Now pump up the air entrainment meter until the black pointer of the
pressure gauge is slightly behind the red marking pointer (which marks the initial
pressure). Wait a few seconds until the air in the air chamber has cooled down to room
temperature. If you have allowed the black pointer to go too far (i.e., past the red
marking pointer), correct the pressure by briefly pressing the CORRECTION button.
At the same time, tap with your finger gently against the dial of the pressure gauge
until the pointer comes to rest.
9. Activate the overflow valve by pressing the TEST button. This will allow air to flow from
the pressure chamber into the test pot. Press the TEST button several times until the
pressure has equalized. At the same time, tap with your finger gently against the dial
of the pressure gauge until the pointer comes to rest.
4.2 Results of testing for the initial pressure
The following three test results are possible:
I.
If the black pressure-gauge pointer moves to 0 %, then the position of the red marking
pointer is correct (for more details, please see Section 4.3).
II. If the pressure-gauge pointer goes beyond zero (for example, to 0.1 or 0.2 %), then it
is necessary to move the red marking pointer farther to the left
– i.e., in the opposite
direction
– by the same % amount (in this example, 0.1 or 0.2 %):. To make this
