Hach-Lange POLYMETRON 9245 User Manual - Manual (Page 60)

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Operating Instructions
5.2.2 Historical display
This screen shows the last four sample measurements, the last grab sample measurement and
the last verification and gap measurements. Underneath these measurements, the actual
potential between the glass electrode and the reference electrode is displayed along with the
temperature.
Select Main to return to the main measurement screen.
5.2.3 Alarms screen
Alarms S1-S4 relate to the four alarm outputs. This is followed by the warning alarm (W!) and
the system alarm (small graphic). The message against each alarm will indicate OK (no
problems encountered), INACTIVE (the alarm has been deactivated), or a message indicating
the reason for the alarm.
For information on setting up the alarms, please refer to Alarms on page 76 . In addition, Table 6
on page 79 lists all the possible error messages and indicates the type of alarm (warning or
system). If a manual alarm acceptance has been set up, select Enter to deactivate the alarms.
Select Hist. to go to the history display, or Esc to return to the measurement display.
Figure 15 Historical measurement screen
Figure 16 Alarm screen