TESTO 6681 Instruction Manual page 18

testo 6681
18
1.3.1.2
1 Hold wall/duct bracket (order no. 0554 6651) (6) against duct wall (8)
and mark drill holes for wall/duct bracket and probe shaft.
2 Drill a hole (∅ 12.5 mm) in the duct wall to feed through the probe
shaft.
3 Fasten wall/duct bracket (6) to duct wall with screws (5).
4 Push probe shaft (9) with filter (10) through the middle hole of the
mounting bracket.
- 1.3 Commissioning
Duct mounting (for testo 6612 probes)
The wall/duct bracket (6) has an O-ring (7) to seal it against
the duct. Feed the probe shaft (9) carefully through the
wall/duct bracket so that the O-ring is not damaged.