Hach-Lange PHOSPHAX indoor sc - Manual (Page 45)

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Maintenance
6.4 Shut the analyzer down
No special measures are necessary for taking out of operation for a
short period (up to a few days in frost-free ambient conditions).
Important note: If the power supply to the controller is interrupted,
frost damage may occur. Ensure that the instrument and tubing
cannot freeze.
1. Interrupt the measurement and switch the instrument to the
service state.
2. Isolate the analysis instrument from the controller.
6.4.1 Shut the analyzer down for an extended period
Important note: Always wear safety equipment when handling
chemicals.
Use the following procedure if the instrument is to be taken out of
operation for an extended period, or in the case of risk of frost.
1. Immerse the tubing for reagent and cleaning solutions in
distilled water.
Figure 19 Modification of PHOSPHAX sc
1 Overflow vessel 4 Valve block
2 Fitting of sample tube 5 Sample tube
3 Blind plug