12-11 ATM 35-56 - Farmi Tilatech Oy

VENTILATION UNITS ATM 35-56
Calibration lines
The graph below shows the relationship between the number of revolutions of the airflow transmitter
and the airflow flowing through the ATM-unit. If the number of revolutions is known, the air
displacement can be read at the calibration line concerned.
For example: when the airflow transmitter of the ATM 45 revolves at a rate of 1500 revolutions per
minute, 4500 m 3 /h is displaced.
The measurements were carried out by an ATM-unit equipped with an air entry cone but without a
protection grid. This is connected to the corresponding Fancom fan that is also built into the chimney
module. The measurements were carried out in accordance with the international standards
DIN 1952 (1971), NEN1048 (1962), NBN 688 (1966), NBN 793 (1968).
Measuring range [m3/h]
Type Minimum Maximum
35 125 3500
40 175 5000
45 225 6500
50 275 8000
56 350 11000
12,000
Air displacement
in function of revolutions of the airflow transmitter
10,000
ATM 56
Air displacement [m 3 /h]
8,000
6,000
4,000
ATM 50
ATM 45
ATM 40
ATM 35
2,000
0
0 200 400 600 800 1,000 1,200 1,400 1,600 1,800 2,000
number of revolutions made by the airflow transmitter [rev/min]
11-06-08 / All rights reserved pag. 12-11-02