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Photometer 7500
At the completion of the measurement process
the result is displayed on screen.
Timer
Many photometric methods require a reaction time
to develop optimise sensitivity, the recommended
time period being documented in the Palintest Phot
Book and included as part of the method parameters
programmed into the Photometer 7500.
Tests requiring a reaction time will have the option to
select an automatic timer to count down the reaction
time required. While in the Insert sample screen use
the right key to move the cursor to highlight Timer.
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The programmed reaction time will be displayed.
Press OK to Start the countdown.
Three options will be displayed:
Stop
cancel the countdown timer
Exit
exits the countdown screen and
returns to the Insert sample
screen. The countdown will
continue and the current time can
be seen by selecting Timer. At the
end of the countdown an audible
alarm will sound to indicate the
sample is ready to read. Select
OK to read the sample manually.
Exit and Read exits the countdown screen and
automatically reads the sample
at the completion of the allocated
time period.
Changing Result Units of Expression
Many chemical species have a number of
alternative units that can be used for reporting
results e.g. Phosphate can be expressed as
PO
or P for example.
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Where alternative units of expression for results
are available the ▲▼ symbols will be displayed
next to the current result units. Use the up/down
arrows to change the units of expression as
required. Values are modified automatically.
Results stored in the log will be in the units
selected on screen, changing the chemical species
will add an entry to the log showing the updated
result and species parameter selected.
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