Hach-Lange POLYMETRON 9523 User Manual - Manual (Page 10)

• The sample must only contain an alkaline agent (ammonia, sodium hydroxide or ethanolamine)
• Any impurity is principally NaCl (sodium chloride)
• The concentration of impurity must be negligible in comparison to the alkaline agent
Control of conductivity values
Control of the minimum and maximum conductivity values depends upon the volatile conditioner.
These values are illustrated in the following two tables.
Note: AVT (All Volatile Treatment) - Conditioning concept where only volatile alkalizing agents are used; mainly
ammonia.
NH
3
Conditioner:
AVT
pH 7 - 10.0
Conductivity C1 (μS/cm) 2.8 - 28
Acid conductivity C2 (μS/cm) < 0.5
NaOH Conditioner:
AVT
pH 7 - 10.7
Conductivity C1 (μS/cm) 2.5 - 125
Acid conductivity C2 (μS/cm) < 100
Installation
C A U T I O N
Multiple hazards. Only qualified personnel must conduct the tasks described in this section of the
document.
Analyzer mounting
Attach the analyzer to a stable, vertical surface. Refer to the guidelines that follow and Figure 2 .
Note: If an external controller is used, refer to the controller documentation for mounting instructions.
• Put the instrument in a location that has access for operation, service and calibration.
• Make sure that there is good view of the display and controls.
• Keep the instrument away from a heat source.
• Keep the instrument away from vibrations.
• Keep the sample tubing as short as possible to minimize the response time.
• Make sure that there is no air in the sample supply line.
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