biochrom Libra S4, Руководство пользователя, Страница: 7 / 22

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Issue 02 - 03/2005
Libra S4, English 3
Using the Instrument
The liquid crystal display is very easy to navigate around using the function / select
and arrow keys on the hard wearing, spill proof membrane keypad.
Keypad
To switch the instrument on, press once
To switch the instrument off, hold the key down for 2 seconds
√
To set up or confirm an entry
0A/100%T To set reference to 0.000AU or 100%T on a reference solution at the
selected wavelength
To make a measurement or stop a rate experiment
34
To highlight the 6 measurement indicators in turn (see below)
56
Depends on mode, see below
Display
Highlight your selection using
34
, then:
nm
To enter wavelength; to select, press
56
then
√
Abs/%T
To measure Abs or %T; to select, press
56
(“Abs” or “%T”
displayed at side)
Conc To measure concentration either using a factor or relative to a known
standard; to select, press
√
(“Conc.” displayed at side)
Rate To measure absorbance as a function of time; to select, press
√
Factor To enter a factor for use in concentration; to select, press
√
To display time and change time / date if required; to select, press
√
The following symbols appear and signify the following:
r r r r Setting reference / measuring blank
“0.123” flashing
Displaying previously measured value when measuring sample
Error Messages Error messages may appear on the display and mean the following:
FAIL flashing Can carry on using; refer to error messages section
FAIL constant Cannot use; refer to error messages section and contact your supplier