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© Diatron MI Ltd. 2005
7.2 Calibration
Calibration is the procedure used to standardize the instrument by applying
necessary correction factors.
It is recommended to do calibration in the following cases:
1. At analyzer installation, before beginning the analyses.
2. After replacing any component, related to the process of dilution or
measurement.
3. When quality control measurements show any systematic error (bias) or they
are outside predefined limits.
4. At regular time intervals (determined by the lab itself).
5. If you want to use the instrument in Prediluted mode.
Calibration can be performed in two ways:
1. User can enter calibration factors - without any calibration measurements –
using the numerical keypad.
2. One-, or three-fold measurements of control or special calibrations material
with known parameters. In this case, the instrument automatically calculates
new factors using the following formula:
Target value x Stored factor
New factor =
Measured value(s) (or average of those)
CAUTION! New calibration will invalidate previous factors. Old values cannot
be retrieved, but can be reviewed in VIEW CALIBRATIONS menu.
Calibration can be initiated by choosing Calibration in UTILITIES.
Item 1 opens CALIBRATE menu level,
shown on the figure.
Item 2 displays the pervious calibration
factors.
Item 3 allows selecting calibration mode,
and basic parameters.
