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"funnel" near the tip of the cup, use a swab or direct a stream of cleaning agent at the area while the pump is
running. Remember, waste must be actively removed from the cup. Gravity alone will not insure draining of the
cup.
•
Alternatively, you may remove the cup and clean it. Note: Do not attempt to remove the stainless steel inlet tube
from the cup. Remember to realign the sipper with the cup before initiating another monitor run.
The cup body is machined from acetyl copolymer (tradename, Celcon). The outlet fitting is polypropylene. Cleaning the
cup with boiling water and/or steam sterilization will not harm the cup parts.
10. Storage
During normal use, the 2900 Series should be left with the power on at all times. It should also have an adequate supply
of buffer for any installed Membranes or ISEs. This will keep the enzyme probes polarized and ready for use and prevent
the reference ISE from drying out.
Instrument Storage
10.1
If the 2900 Series is not going to be used for 2 weeks or longer, remove the buffer and calibrator solutions from the bottles
and replace them with deionized or distilled water. Flush the water through the system thoroughly, empty the bottles,
reinstall them in the instrument and prime the system with air. After all the fluid has been pumped from the system, drain
the sample modules by temporarily removing one probe. Reinstall the enzyme probes and store the instrument with the
membranes in place.
Store the instrument in an environment from 15–35°C, 10–75% humidity (non-condensing).
Enzyme Membrane Storage
10.2
Extra membranes should be refrigerated until use. Once installed, Membranes should remain in the appropriate buffer
solution and not allowed to dry out.
ISE Storage
10.3
10.3.1 Reference ISE
Do not allow the reference ISE to dry out. Always store it wet (in ISE buffer solution).
10.3.2 Ammonium/Potassium ISE
For storage of 5 days or less, store the ammonium and potassium ISEs wet (in ISE buffer solution). For storage greater
than 5 days, store the ammonium and potassium ISEs dry and in a dark enclosure.
Instrument Handling/Transport
10.4
Before transporting, drain all fluids as described above and secure the sipper assembly.
Transporting the instrument may require two people.
11. Troubleshooting
This section provides a systematic approach to establishing the cause of an instrument malfunction. Before taking any
corrective action, be certain you have collected as much pertinent information as possible.
