Roche OMNI C, Instructions For Use Manual

Page: 59 / 152

3 Calibration
Instructions for Use, Roche OMNI C, Rev. 4.0, December 2002
3-1
3 Calibration
The Roche OMNI C employs a patented method that allows the simultaneous calibration of
P CO
2
, pH, Na
+
, K
+
, Ca
2+
and Cl
–
electrodes while using only two calibration solutions
(C1 calibration solution 1 and C2 calibration solution 2).
The chemical properties of the basis solutions and the concentration of their components
make the system insensitive to environmental influences during storage and use.
3.1 Automatic calibrations
The following calibrations are automatically initiated and performed by the analyzer.
3.1.1 System calibration
Every 8, 12 or 24 hours (default) which includes the following:
• Cleaning with internal cleaning solution
• Automatic conditioning of the Na electrode
(every 24 hours)
• Calibration of the mixing system
• 2 point calibration of all parameters
TIP: The user can set a permanent start time for the system calibration. This enables com-
pletion of calibration tasks while the Roche OMNI C is not in use or when the workload
in the laboratory or station is smaller (see Reference Manual, chapter 8, "Operating
modes", section "Setup").
3.1.2 2P calibration (2P cal)
This calibration is a 2 point calibration of all parameters.
Adjustable: 4, 6, 8, and 12 hours (standard).
3.1.3 1P calibration (1P cal)
This calibration is a 1 point calibration (incl. O
2
) of all parameters.
Adjustable: every 30 minutes (standard), 1 hour.
3.1.4 Recalibration
This calibration is a 1-point calibration (without O
2
) performed after every measurement
taken.