Bayer HealthCare RapidPoint 400 Series Service Manual page 183

D2 Qualifier Descriptions
D2 occurs only if the sensor passes slope and offset requirements (D3
and D4) during the current calibration operation. A pH error causes a D2
for pCO
2.
D2 is detected during calibrations when:
• The drift is calculated and limit-checked for both calibration points.
• Inherent noise or instability is determined during the measurement.
• A special case exists for pCO
error occurs for pH and a D3 or D4 is not detected for pCO
Drift errors are cleared by the next calibration if drift is within limits or the
channel is disabled through Setup. The channel returns to the calibration
state when the system completes a successful 1- or 2-point calibration.
Rev. C
which reports a D2 error when a drift
2
.
2
Troubleshooting 183