Bayer HealthCare Rapidlab 800 - Manual (Page 307)

4Ć23 Troubleshooting the System
D4 Offset Error:
Glu Lac
Problem
Sensor offset is beyond predefined limits during a two-point calibration.
Qualifiers: Glu Lac
Solutions
NOTE:ĄĂ If D codes also exist for reagent problems such as D23, D24, D29, or
D50, correct these problems first, then correct the D4.
Check that the biosensors are installed in the correct order and are aligned, the
O-rings are in place, and the spring-loaded latch is closed as described in
Removing and Checking the Sensors on page 4-65.
Check the expiration dates and the levels of the reagents. Ensure that the
reagent bottles are installed properly and in the correct location. If reagents
have expired, are low, or are incorrectly installed, replace the affected reagents,
and perform a two-point calibration.
If the glucose or lactate biosensors have been on the system less than one day,
then perform three two-point calibrations.
Replace the biosensor as described in Replacing the Glucose and Lactate
Biosensors in Section 3.
If the D code reappears, contact your Service Representative.
D4