Metrohm 781 pH/Ion Meter - Manual (Page 61)

5 Configuration
780/781 pH/Ion Meter, Manual
51
5.5 Monitoring
CONFIG
:
├
monitoring
: ├
validation
├
service
└
system test report
The 780/781 pH/Ion Meter can inform you automatically about reoccur-
ring quality monitoring tasks.
validation: ON, OFF
time interval 1...365...9999 d
time counter 0 d
If this option is active then you can enter a time interval in days and,
when it has elapsed, the instrument will request you to carry out a vali-
dation process.
In addition, the time counter shows the elapsed time in days since the
last time that this option was switched on. When the time counter
reaches the set number of days then the following message will ap-
pear:
validate instrument
This will also be included in the report header. It can only be removed in
the following ways:
•
Resetting the time counter to zero under CONFIG/monitoring/
validation with <CLEAR>
• Extending the time interval and then switching the instrument off
and on again
• Switching off the validation monitoring option
In order to prevent unauthorized removal of the message the <CON-
FIG> key can be disabled under the instrument SETUP (see Sec-
tion 7.5.1), so that the settings described above are no longer accessi-
ble.
service: ON, OFF
next service YYYY-MM-DD
At a particular time the instrument can remind you about the date when
a service is due. When the set date has been reached the following
message appears on the display:
service is due
This is also included in the report header and can be switched off by ei-
ther entering a new and later service date or by switching this monitor-
ing function off.