TPS WP-81 - Instrument Serial Number; Additional GLP Features

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8.4 Instrument Serial Number
In case the serial number that is fitted to the rear of the WP-81 is
removed or becomes illegible, it is also available on the WP-81 display.
 The serial number is displayed at turn-on, for example…
WP81 V6.0 S1234
Con TDS Sal pH
o
C
where S1234 is the serial number.
 The serial number is display when recalling the GLP information
(section 8.1).
 The serial number is included on the print-out of GLP information
(section 8.3).
8.5 Additional GLP Features
Another GLP requirement is to record the date and time of every reading.
The WP-81 does this for you when readings are recorded either with the
Notepad function (section 9) or the Automatic Logging function (section
10).