TESTO 6681 Instruction Manual page 23

1.3.2.2 Duct mounting (for testo 6612 probes)
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.
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.
5 Fix the correct position of the probe shaft (9) with screw (11) and
mark (insert probe shaft as far as possible).
testo 6681 Ethernet
- 1.3 Commissioning 23