Hach-Lange POLYMETRON 9245 User Manual - Manual (Page 86)

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User Setup
7.6.2 Sequence
7.6.3 Channel names
For this version of the analyzer (single channel), samples can
only be analyzed on channel 1. Therefore, the default
sequence (as illustrated left) should be left as is.
Define the name of the channel with free-format alphanumeric
text up to a maximum of 8 characters.