Maintenance Schedule - Hach QP 1680-TOC Manual Básico Del Usuario

8. Start the method "Test method: Send sampler to IC port to check system pressure". The analyzer
sends the Sampler to the IC port to close the IC port inlet.
The Condenser box shows the temperature of the condenser. When set at 1 °C, the value must
be 1 °C ± 0.5 °C.
The Oxygen pressure box shows the internal pressure of the oxygen or synthetic air. The value
must be 1800 to 2300 mbar.
9. Remove the containers from the analyzer.
In Visual devices, make sure that the values for the weigh unit cups are 0 g ± 10 g.
10. Install the containers filled with the applicable reagents in the weight units. Use the color label to
identify the tubing for each container.
• Weight unit 1: ultra pure water. Connect the two green tubes.
• Weight unit 2: acid. Connect the red tube.
• Weight unit 3: waste. Use 4-mm PTFE tubing for the waste. As an alternative, put the tube in a
sink.
11. In Visual devices, examine the cooling and heating values.
For analyzers with nitrogen detector, the cooling value must be 10 °C ± 5 %. The heater value
must be 50 °C ± 5 %.
12. Examine the furnace temperature values.
For analyzers without nitrogen detector, the value must be 680 °C ± 5 %. For analyzers with
nitrogen detector, the value must be 720 °C ± 5 %.
13. Install the tray in the analyzer. Make sure that the tray shows in Visual devices.
14. Open and close the front cover. Make sure that the status of the front cover shows in Visual
devices.
5.1 Examine the sampler tubing
Make sure to fix the sampler tubing with the tubing clamps. Make sure that the routing of the sampler
tubing is correct. The tubing must let the sampler arm move freely.
Section 6 Maintenance
Multiple hazards. Only qualified personnel must conduct the tasks described in this
section of the document.
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.
Chemical exposure hazard. Dispose of chemicals and wastes in accordance with local,
regional and national regulations.

6.1 Maintenance schedule

Multiple hazards. Only qualified personnel must repair and do maintenance tasks of
compressed gas cylinders and accessories.
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