Bayer HealthCare Rapidlab 800 - Manual (Page 309)

4Ć25 Troubleshooting the System
D5 No Endpoint:
Na + pH K + Ca ++ Cl -
Problem
Sensor does not reach stable reading during predefined time limit.
Qualifiers: pH K + Ca ++ Cl – Na +
Solutions
NOTE:ĄĂ If D codes also exist for reagent problems such as D23, D24, or D29,
correct these problems first, then correct the D5.
Perform a two-point calibration.
Deproteinize the sample path and condition the sensors as described in
Deproteinizing the Sample Path and Conditioning the Sensors in Section 3.
Check the solution level in the affected measurement sensor and look for
bubbles. The pH, K
+ , Ca ++ , and Cl – sensors should be nearly full. The Na +
sensor should be full. If the solution level is low, refill the sensor as described in
Filling the Measurement Sensors in Section 3.
Check the solution level in the reference sensor and look for salt in the vent
hole, bubbles in the sensor, or leaks. If the solution level is low or salt, bubbles,
or leaks are present, clean and refill the reference sensor as described in
Cleaning the Reference Sensor and Removing Bubbles and Filling the Reference
Sensor in Section 3.
Check the sensor contacts and measurement block for salt buildup. Check
behind the sensors for fluid leaks, which can come from the reference sensor. If
salt or leaks are present, clean the sensor with reagent water, dry, and perform a
two-point calibration after reinstalling the sensor.
Perform the Measurement Test for the affected sensor as described in
Measurement Test, page 4-70.
Replace the affected sensor as described in Replacing the Measurement or
Sample Ground/Temperature Sensors in Section 3.
If the D code reappears, contact your Service Representative.
D5