Jenway 6715 - Manual (Page 142)

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9.4 PerForMinG MeASUreMentS – all users
A minimum of a zero Absorbance calibration must be made before any measurements can be carried
out. Having completed this, any pre-existing calibration curve can be used to make measurements
against, or a full calibration using the settings in the method can be made as follows:
Selecting the Cal key will display a prompt to carry out the zero absorbance. This is not part of the
calibration curve but ensures the reference levels are set correctly at this wavelength. If a blank is not
used for this setting then it should be used for
Cal Std 1.
If Interpolation is used as the curve fit, then using the blank for this and Cal Std 1 will ensure the first
segment passes through the origin.
Selecting Yes completes the zero absorbance setting and is followed by a prompt to continue and
overwrite the calibration curve.
Selecting No returns the measurement screen, with the default or existing calibration curve displayed
ready for sample measurement.
Selecting Yes continues with construction of a new calibration curve and a prompt display showing
‘Please enter Standard: xx’. Where xx is the first standard in the table and could be the blank.
Selecting Yes completes the measurement of this standard.
Information on the standard and absorbance measured is then displayed along with a prompt to insert
the next standard. This process continues until all standards have been measured.
For sample measurement insert the sample cuvette into the sample chamber and select the Read
key. The measured absorbance and calculated concentration are then displayed beside the calibration
curve. Results can be printed and saved, as required.
The calibration curve is stored with all results and the method for future reference and use.