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 15 of 42 pages
Note
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
(please see the pictogram on the meter).
Adjustment of the quick-release latches:
Note
If the clamping force of the quick-release latches is not correctly set,
then adjust the clamping tension as described in the following:
Important: Each time after you adjust the clamping tension of the
quick-release latches, you must re-calibrate the air entrainment
meter.
For the 0.5; 0.75-litre and 1-litre TESTING air entrainment meter:
Adjust by making one complete turn of the hooks of the clamps.
For the 5-litre,7-litre and 8-litre TESTING air entrainment meters:
In making precision adjustment of the quick-release latches, one
complete turn of the clamp hooks can often be too much. For this
reason, turn the hook
– as required – for less than one turn, then
press it toward the inside, and finally turn it into the straight, locked
position. This does not change the clamping tension. Then pull the
hook toward the front, until the nut lies flush at its limit position.
7. Open the two ball shut-off valves: A and B. They are open when their levers are
pointing upward.
8. Use the squeeze bottle to fill water into the left ball shut-off valve (A) until all the air
remaining in the unit between the top cover and the top surface of the mortar or
concrete has escaped from the air entrainment meter through the right ball shut-off
valve (B) on the opposite side.
Important
: Fill in the water until the water that comes
out from the right valve (B) has no air bubbles. During this step of work, tilt the air
entrainment meter to the left (see section 7. Calibration instructions, 8-litre, picture no.
6) so that the ball shut-off valve on the right side (B) points approximately vertical and
so that it provides the highest point for the air to escape from the air entrainment meter.
