Anatel A643a - Troubleshooting 181 of 220
RPS - June 2007 - Edition 12
Anatel Operator Manual
14.3.1 Draining the Instrument
It is extremely important to drain the Anatel A643a of all water whenever the instrument is
removed from its source for two reasons:
• When the Analyzer is removed from service for temporary or long term storage (longer
than a month), any water remaining in the measurement cell is a medium for bacteria
growth. In addition, elements contained in the sample water will settle and adhere to the
instrument components causing contamination. It is strongly recommended that the
Analyzer self-clean for an extended period of time when reinstalling it to ensure accurate
and stable data.
• Draining the water out of the Analyzer also avoids freeze damage. If the Analyzer is
stored or shipped in an extremely cold environment, the water inside the instrument will
expand and could severely damage sensitive components. Replacing these components
is expensive and will increase the amount of repair time as much as a week.
Remember that an instrument stored in a warehouse in the winter can be freeze-damaged if
water is left inside and a unit shipped from a warm climate to a cold climate is exposed to
extreme temperatures en route.
To purge the Anatel A643a of entrained water:
1) Press the ON/OFF button to turn the Analyzer off.
2) Close the (user-supplied) upstream isolation valve to terminate the water supply to the
Analyzer.
3) Remove the sample vessel and empty it of any residual water.
4) Disconnect the sample tubing from the WATER IN connection. A small amount of
water will be present in the instrument and its plumbing. The water drains from this
connection due to gravity and its location at the bottom of the Analyzer’s measurement
cell. Take steps to catch this water when the tubing is disconnected so it doesn’t spill
onto the work surface.
5) Press the ON/OFF button once again to restore power to the Analyzer.
6) Press the Manual Key to access its menu selections.
7) Use the Up and Down Keys to select Manual Samples then press Enter.
8) Select Grab Sample to run a manual measurement and flush the Analyzer of any
entrained water.
9) If necessary, press Esc and repeat step 6 through step 8. When the water is
completely drained, press eto exit this operational mode.
Once the water is drained from the Analyzer cell, a Code 27: Conductivity Range may be
reported. This is normal due to the dry measurement cell.
10) Turn the Analyzer off, disconnect it from its power supply, and cap the plumbing
connections. The instrument is ready for shipment or storage. For any questions about
performing this procedure, call the Anatel Application Specialists for assistance.
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