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 17 of 42 pages
18. For practical reasons, it is not necessary to apply the aggregate correction factor when
you use normal and dense aggregate (G = 0). If you need to determine the aggregate
correction factor, conduct the air entrainment test with aggregate and water in the test
pot which has been filled without air (also see EN 12350-7, Attachment B).
19. The absolute air entrainment (Ac) of the sample is calculated according to the
following equation:
Ac
=
A1- G
[
V-%
]
Ac
=
absolute air entrainment
A1
=
apparent air entrainment reading
G
=
aggregate correction factor
Caution
Please work strictly by this order, otherwise mortar or concrete may get
into the pressure chamber.
After pressure compensation, the CORRECTION button must not be
pressed under any circumstances, as otherwise sample material will
flow through the channels into the pressure chamber after the TEST
button has been pressed. This will damage the instrument and make it
unusable. The valves leak and the volume changes.
3. Cleaning and maintenance
If these air entrainment meters are properly used, they need no special maintenance.
After performing a test, carefully clean the air entrainment meter with a moist sponge, and
dry it off. Rinse the ball shut-off valves thoroughly by using the squeeze bottle to squirt
water through them. Then oil the ball shut-off valves.
Caution
Never
immerse the air entrainment meter in water. The machine is
protected against spray water, but it is not waterproof.
When cleaning the air entrainment meter, be sure to lock the pump
piston rod by screwing it tightly to the right. This will prevent water from
entering the air entrainment meter through the pump.
