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System Administration 5Ć57
This section describes procedures for the following calibration options:
S changing drift limits
S changing calibration gas values
S selecting calibration frequency and Auto Repeat
Use this procedure to enter the drift limits allowed during calibrations. Drift is the
difference between the value expected from a known calibrant and the actual value
measured during the calibration. Some drift is acceptable. This procedure lets you
define the acceptable drift limits for your laboratory.
If drift exceeds the acceptable limits, the results are flagged on the screen and on
the report and are reported in the status log. The drift limits defined in Table 5-22
are for cal points only. The drift limits for slope points are fixed and cannot be
changed. Table 5-22 lists the valid range and default value for each parameter for
the listed base models and base models with CO-ox module.
pH 0.000 – 0.050 ±0.015 840, 850, 860
pCO
2
3.5 – 9.0% ±5.6% 840, 850, 860
pO
2
2.0 – 7.0% ±4.1% 840, 850, 860
Na
+
0.00 – 10.00 ±2.5 850, 860
K
+
0.00 – 1.00 ±0.15 850, 860
Ca
++
0.00 – 1.00 ±0.05 850, 860
Cl
–
0.0 – 10.0 ±3.0 850, 860
Glucose 3.5 – 12.5 ±9.0 860
Lactate 0.05 – 0.40 ±0.10 860
tHb
0.0 – 0.4 ±0.2 base model with a CO-ox module