HACH LANGE QuikChem 8500 2 Serie Wartung Und Fehlerbehebung Seite 6

Clean the sampler
Clean off spills immediately. Neutralize acid spills with a commercial acid neutralizer solution.
Clean the sample tray and sampler core unit with a lint-free cloth dampened with a lab-grade
cleaning agent. Do not let the cleaning agent come in contact with the lead screws. Remove the
cleaning agent with a lint-free towel dampened with water.
Clean the modules
Chemical exposure hazard. Obey laboratory safety procedures and wear all of the personal protective
equipment appropriate to the chemicals that are handled. Refer to the current safety data sheets
(MSDS/SDS) for safety protocols.
Clean the exterior of the modules with water and a paper towel. Remove chemical spills according to
MSDS instructions.
Shut down the system
1. To use a manifold with a column, such as the cadmium column for nitrate, make the column
offline. Set the switching valve to the bypass position. If the manifold has a column, but does not
have a switching valve, set the pump power to off and replace the column with a piece of Teflon
tubing. Start the pump.
Note: Some methods make it necessary for some reagents (typically, the buffer) to be removed last. Look at
the QuikChem method for instructions.
2. Remove the reagent tubing from each reagent and rinse the tubing and glass weights. Keep the
lines and weights in rinse solutions.
3. If the QuikChem method recommends a rinse solution, install all reagent transmission tubing in
the solution and operate the pump for five minutes at standard speed.
Note: This is a critical step in the preventive maintenance of the manifolds.
4. Install the transmission tubing in deionized water and let the system rinse for 10 minutes at
standard speed.
5. If the manifold will not be used for more than three days or it is removed and kept in storage:
a. Remove the transmission tubing from the deionized water.
b. Use the pump to remove all liquid from the manifold.
6. Set the power to the pump to off. Release the pump tube cartridges.
7. Close all files on the computer.
8. Set the power to the power strip to off.
Note: If a lower set-point temperature is not given in the software, the heater controller stays at the original set
temperature. If the method makes it necessary for a temperature higher than 60 ºC (140 ºF), lower the
temperature setting to 60 ºC (140 ºF) or less before power is removed from the system.
Heater mandrel maintenance
Personal injury hazard. Use of non-approved parts may cause personal injury, damage to the
instrument or equipment malfunction. The replacement parts in this section are approved by the
manufacturer.
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