AFA4000/2
Airflow Monitor / p.40
The sensor incorporates a potentiometer, it allows the beam sensitivity to be adjusted to
sense glass objects.
4.3.6
Sash Low switch
When a Tiptronic control is not in use, a Sash Low switch is used to signal to the Auto
Sash Control Unit that the fume hood sash is closed.
The switch can be either a mechanical roller lever type micro-switch or an inductive
proximity switch.
Roller Lever Micro-Switch
Inductive Proximity Switch
Figure 11: Typical Sash Low switches
4.3.7
Sash Position sensor
The Sash Position Sensor comprises of a flexible cable, a spring-loaded spool and a
potentiometer. It is used, in conjunction with the Tiptronic control option, to detect and
measure vertical sash movement and the position of the fume hood sash.
During the initial on-screen calibration set up the sash controller detects the sensor
direction of travel and then provides position information of the sash to the Auto Sash
Control Unit, to enable calibration of the sash open / closed positions.
Summary of Contents for AFA4000/2
Page 1: ...AFA4000 2 Airflow monitor Installation and operating manual Issue 1 ...
Page 50: ...AFA4000 2 Airflow Monitor p 50 Figure 21 AFA4000 2 typical connection diagram ...
Page 51: ...AFA4000 2 Airflow Monitor p 51 Figure 22 AFA4000 2 AS typical connection diagram ...
Page 52: ...AFA4000 2 Airflow Monitor p 52 5 4 Dimensions Figure 23 AFA4000 2 and AFA4000 2 AS dimensions ...
Page 53: ...AFA4000 2 Airflow Monitor p 53 Figure 24 SM7 airflow sensor dimensions ...
Page 90: ...AFA4000 2 Airflow Monitor p 90 6 10 Auto Sash System Control Box general wiring diagram ...
Page 127: ...AFA4000 2 Airflow Monitor p 127 ...
Page 140: ...AFA4000 2 Airflow Monitor p 140 Figure 69 Typical connection diagram ...
Page 144: ...AFA4000 2 Airflow Monitor p 144 Figure 70 Connection diagram with RS232 485 converter ...