Roche Diagnostics
C-40 Operator’s Manual · Version 1.0
6 Special operations URISYS 2400
Calibration
Specific gravity (SG) calibration
The specific gravity of the sample changes with temperature. Since the
URISYS 2400 analyzer measures the temperature of the flow cell, there may be
a difference in temperature between the sample and the flow cell. Therefore,
the temperature of the urine sample and the calibration solutions must always
be at room temperature.
a To prepare the calibration solutions
Use deionized water and reagent-grade NaCl to prepare the following
solutions, and place them in a rack:
Set the rack on the input line.
a To calibrate the SG meter
1 Press <Menu> on the [Routine Monitor] screen. The [Menu] screen is
displayed.
2 Press <Tools>. The [Tools] screen is displayed.
3 Press <User Calibration>. The [User Calibration] screen is displayed.
4 Press <SG Calibration>. The [SG Calibration] screen is displayed.
5 Press <Calibrate>. The [SG Calibration] window appears.
6 Press <Execute>.
Sample analysis can start even if the SG calibration is unsuccessful. If SG
calibration is unsuccessful, the previous calibration values are used.
Positions 1 and 3 Deionized water
Positions 2 and 4 NaCl solution 10.0 g/dL
Position 5 NaCl solution 5.0 g/dL
After the calibration process is completed, “Calibration OK” or “Calibr. Failed” is
displayed on the [SG Calibration] screen. If “Calibr. Failed” is displayed, repeat the
SG calibration.
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