Rapidlab 1200 Operator’s Guide: Troubleshooting 6-53
02087462 Rev. V
D4 Codes
D4 Offset Error: pO
2
pCO
2
D4 Offset Error: pH Na
+
K
+
Ca
++
Cl¯
Problem Corrective Action
Sensor offset is
beyond predefined
limits during a
1-point or a 2-point
calibration.
Correct any reagent problems such as D23 codes before you
attempt to correct this D code.
• Perform a 2-point calibration.
Refer to Performing Manual Calibrations‚ page 3-4.
• Check that the sensors are installed in the correct location
and are aligned, the O-rings are in place, and the
spring-loaded latch is closed.
If necessary, remove and install the sensors correctly.
• If the problem persists, replace the sensor.
• If the problem persists, call for technical assistance.
Problem Corrective Action
Sensor offset is
beyond predefined
limits during a
1-point or a 2-point
calibration.
Correct any reagent problems such as D23 codes before you
attempt to correct this D code.
• Perform a 2-point calibration.
Refer to Performing Manual Calibrations‚ page 3-4.
• Check the solution level in the affected measurement sensor
and look for bubbles.
The K
+
, Ca
++
, and Cl¯ sensors should be nearly full. The pH
and Na
+
sensors should be full. If the solution level is low,
refill the sensor.
•If K
+
or Ca
++
have an offset error, replace the fill solution
even if the fluid levels are sufficient.
• If more than one sensor has the offset error, check the
solution level in the reference sensor and look for salt in the
vent hole and bubbles in the sensor.
• Clean and refill the reference sensor as needed.
• Check that the sensors are installed in the correct location
and are aligned, the O-rings are in place, and the
spring-loaded latch is closed.
If necessary, remove and install the sensors correctly.
• If the problem persists, replace the sensor.
• If the problem persists, call for technical assistance.
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