OZONE MONITOR BMT 932 Manual, Rev. 02/2021
41
Apply some LOCTITE to the grub screw in holder
B
Scrubbers
Both scrubber capsules (utility scrubber and reserve scrubber) are positioned near the UV lamp
in the short bar of the black Tee. The reserve scrubber is the capsule nearer to the short bar of
the Tee. The other capsule is the utility scrubber. Withdraw the black Viton tubing from the
scrubber capsule and screw the capsule out like a big screw. The new scrubber capsule is installed
backwards: Screw it in and push the black Viton tubing on the grey nipple on top of the scrubber
capsule.
The wall mount cabinet BMT 932C may be opened only after it had been disconnected from the
mains power line. The special mains connector may not be disconnected before mains voltage
has been interrupted. When the door is open replacement procedures for UV lamp replacement
and scrubber replacement are as described above.
20.2 Optical System: Disassembling, Cleaning
To internally clean the cuvette and the cuvette windows the cuvette tube (the long bar of the Tee)
has to be removed from the cuvette assembly. First disconnect the clear FEP tubing from the SS
one-touch fitting (elbow) by pushing the ring and, at the same time, pulling out the FEP tubing.
Then pull the black Viton tubing off of the grey plastic nipple (other end of the long bar of the
Tee). Remove both screws using the Allen wrench clipped to the cuvette tube. Now the cuvette
tube can be lifted and removed. The end caps can be removed from the cuvette tube after re-
moval of the two screws inside of each cap.
Attention
: Do not mix up the caps! The depth of the caps is different: The shorter cap belongs
to the SS one-touch fitting (elbow) and the longer cap belongs to the grey plastic nipple.
Now you can clean the quartz cuvette windows using a lint-free tissue (e.g. Kimwhipe "R") and
alcohol. The PTFE inner surface of the cuvette tube has to be cleaned using a lint-free tissue,
wetted with alcohol, which shall be pushed through the tube several times. Before re-assembly
wait thirty minutes for evaporation of alcohol residues.
For re-assembly go through the above steps in reverse order.
