Jenway 6850 - Manual (Page 23)

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SECTION 5 – PHOTOMETRICS
The photometrics measurement mode enables simple measurements of absorbance, %
transmittance and concentration to be performed. In this measurement mode it is possible to calibrate
against a standard of a known concentration or use a known factor. The sample is measured at one
wavelength at one point in time. There are no post measurement calculations available in this
measurement mode.
5.1 PHOTOMETRICS MENU SCREEN
The photometrics measurement mode screen enables
measurement parameters to be changed. The four
options at the bottom of the screen allow the user to
select the unit of measurement, the measurement
mode, the concentration factor and the calibration
standard ’s concentration. These options are selected
with the corresponding function buttons.
5.2 METHOD SET UP
The photometrics measurement mode is very simple and the only parameters which can be adjusted
are the wavelength, the units of the measurement the measurement mode and the concentration
setup parameters.
5.2.1 Selecting a Wavelength
The wavelength can be adjusted by pressing the GOTO

key on the instrument keypad. The required
wavelength can then be entered using the numerical keypad. Press the Enter key to confirm.
5.2.2 Selecting the Measurement Mode
The measurement mode can be selected by pressing the function key below the Mode option. The
required measurement mode can then be selected from the available options of Abs, %T and
Conc/Factor using the up and down arrow keys. Press the Enter key to confirm.