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Supposing that one only probe is connected to input A of the multifunction instrument, the initial
screen page will be the same as the one shown above. A1 represents the current value provided by
the probe, A2 indicates the integration time and A3 the value of the integral calculated on variable
A1.
If you press <F3>, A2 and A3 are brought to zero. To start integration, press <F1> function key: if
no mains external power supply is connected, a “B” will flash to indicate that the integral calcula-
tion is in progress. Integration calculation can be stopped at any time by pressing <F2> Q/Tstop
function key: in this situation and by pressing Q/Tgo again, the integration will re-start.
If one or more limits have been activated in the menu, when the first one is reached, counting will
stop and the indication "
Q/T Time limit
" will flash: A2 represents the time lapsed since counting
was started, A3 represents the value of the calculated integral.
As the integration process develops through discreet steps, the value of A3 at which integration has
to be stopped will not correspond exactly to the set limit, but will correspond to the first integration
value coming after this limit.
Instrument Operation with Several Probes Connected
As already said,
the integration system provides one only limit time for all of the connected
probes and a different integration limit for each probe
.
When the first limit is reached, the relevant indication will be displayed.
If this limit is represented by time, then all integrations are stopped and, scrolling through variables
A3, B3 and C3, the values of integrals calculated up to that moment will be displayed.
If the first limit to be met is that of an integration, then variable 2 of that input (i.e.: A2 in the case
of a probe connected to input A) provides the time needed by the integral to achieve the set limit.
The calculation of the other integrals goes on and will stop only when reaching respective limits or
set time (the first one to be met).
Logging Function
When a light probe is connected, logging function is linked to integration function in this way:
when logging is started, integration time and calculated integral values are set to zero and the calcu-
lation of a new integration is started.
This operation takes place both by immediate logging (<2/LOG> key pressed) and by recorded log-
ging (by entering start and stop date and time),
provided that the instrument is set to remain al-
ways on.
Actually, having to calculate the integral every second, it is necessary that the instrument does not
switch off. Thus, use a logging interval lower than 60 seconds, or, if logging interval is higher than
or equals 60 seconds, set "Self shut_off mode" function of “Logging” menu on “…stay on between
samples”.
2
1
stay on = the instrument will stay on
shut off = the instrument will shut off
0
1
2
3
4
5
7
9
6
8
If the instrument is set to shut off between two subsequent acquisitions, only the instant value of the
signal provided by the light probe will be logged.
