Hach-Lange DR 3900 User Manual - Manual (Page 124)

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Expanded programs
After a lamp is replaced, the display of the switch-on cycles is
reset to 0.
1. Press Lamp History in the "System Check" menu.
2. Press Reset and the lamp data are reset.
3. Press OK to return to the "System Check" menu.
6.9 Toolbar
The right of the display contains a toolbar with various programs.
Many of these programs can also be called up via a menu but the
operation is the same.
6.9.1 Log on
Use this function to enter up to 30 different operator initials (up to
10 characters each) into the instrument. This feature helps record
which operator measured each sample. For a detailed
description, refer to
section 5.2, page 27 .
6.9.2 Sample ID
Use this option to enter up to 100 different Sample Identification
tags (with up to 20 characters each) into the instrument. Sample
IDs can be used to specify the sample location or other sample
specific information, for example. For a detailed description, refer
to
section 5.2.2, page 28 .