Operation
XD 7500
106
ba77191e01 - 71310060
04/2018
4.10
Timer
You can use timers in order to remind yourself with an acoustic signal about
the elapsing of a time interval.
The photometer recognizes two types of timers:
User defined timer
(user-defined timer) is a freely-programmable timer.
The interval and name can be freely set. Only one freely assignable timer
is available. It cannot be deleted (seeSection 4.10.1).
Analysis timer
s are timers that are stored permanently in the instrument.
Name and interval of the analysis timers are stored in the method data of
a measurement method (
Concentration
mode). The number of available
analysis timers corresponds to the number of reaction times that are pres-
ecribed in the analysis specifications for the programmed methods (see
Section 4.10.2(.
The photometer administrates all timers in the timer overview.
You open the timer overview (the
Timer
menu) with the
<TIMER>
button.
Opening the
Timer
menu is possible in any operating situation.
Other functions are not disturbed by operation of the timer.
You exit the time overview with the
<ESC>
key.
When the
Timer
menu is opened for the first time, only the user-defined timer
is in the timer overview. You can include analysis timers into the list or
remove them according to your requirements (see Section 4.10.2).
The timer overview displays the status of each timer and, of a started timer,
the remaining time of the specified time interval.
All timers are started manually.
As soon as one single timer has been started the timer symbol appears on
the display in all operating modes.
As soon as a timer is started, it is given the timer status
Active
.
When the specified time interval has expired, the timer status changes from
Active
to
Expired
and an audio signal sounds.
In the timer status
Expired
the acoustic signal sounds until the timer is
stopped manually.
After the stop, the timer status changes to
Inactive
and the acoustic signal is
switched off.
4.10.1
User defined timer
If you want to manually enter time intervals, use the
User defined timer
func-
tion.
