TEL AFA4000/2, Инструкция по установке и эксплуатации

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AFA4000/2 Airflow Monitor / p.103
Figure 66: Red Power On LED
6. Ensure that Switch 1 ( sw1 ), see Figure 54 , is set to the correct range:
Fume Hood Size Sash Beam Range sw1 Setting
0 to 10’ (up to 3000mm) Short Off
10’ to 16’ (3000 to
5000mm)
Long On
7. Ensure that Switch 2 (sw2) (Figure 65) is set to Off (Operation Mode) .
8. Ensure that Switch 3 ( sw3 ) is set to On (Normal Operation) .
9. Set Switch 4 (sw4) to On . A buzzer will then sound when the beam is broken, this aids
the setting up of the beam.
The signal LED indicates beam status:
•
Green if the detection area is clear.
•
Red if the area is not clear.
10. Turn the gain potentiometer anti-clockwise, to the minimum. The transmitter and
receiver can no longer sense each other.
11. Slowly adjust the gain potentiometer (Figure 65) clockwise (to maximum) until the
transmitter and receiver can sense each other, for example, the receiver can detect
the beam sent from the transmitter.
12. Set sw3 to Off to store the settings.
13. Turn the gain potentiometer approximately 5 degrees clockwise to ensure sufficient
gain.
14. Use a glass object to test whether it breaks the beam. Do this across the entire open
face of the fume hood.