Guildline Autosal 8400B - 6.6.2. METHOD TO REMOVE WATER FROM PICKUP TUBE PRIOR TO MEASURING NEW SAMPLE

Section 6
TM8400B-L-00
1 November 2004
6-8
6.6.2. METHOD TO REMOVE WATER FROM PICKUP TUBE PRIOR TO
MEASURING NEW SAMPLE
NOTE: This method prevents drops of water from contaminating new sample.
(a) Assuming there is water in the cell and in the pickup tube, and that the pumps and
flow are off, turn the flow on.
(b) Switch the pumps on.
(c) Insert the end of the pickup tube into the pickup tube holder.
(d) Cover FLUSH vent, then release.
(e) Observe water flowing out of the pickup tube toward the cell.
(f) When water reaches the metal portion of the pickup tube, lower the tube and wipe
the end with a tissue. Dispose of the tissue after use. This removes salt from the
tube which may have been picked up from the operator's fingers.
(g) Put new sample in place and proceed with reading. Flush 3 times before taking
first reading.