Roche 91 Series - (Out of Range; (Temparature out of Range; CLOG in SAMPLE PATH (9110 Only), CLOG CHECK FLUID PATH (Except 9110

Roche Diagnostics April 2007
Service manual · Version 2.0 D-11
91xx pH/Electrolyte Analyzers 13 Troubleshooting
Error messages and troubleshooting
CLOG IN SAMPLE PATH (9110 only), CLOG CHECK FLUID PATH (except 9110)
After completion of sample measurement or calibration, the analyzer will monitor the
sample sensor to determine if the sample path has been cleared. This message will be
displayed if the sample path has not been cleared.
Possible causes and remedies
o Check for leaks in the fill port and electrode area.
o Check for blockages in the sample path, especially in the sample probe, the tubing
to the preheater or the sample sensor and in the preheater or the sample sensor.
o Perform Electrode Cleaning (9110 only).
o Check sample contacts (9110 only) or sample sensor is securely plugged in and
check Sample Contact Test (9110 only) or Sample Sensor Test to ensure correct
operation.
o Check peristaltic pump and tubing are correct and all tubing is properly in place.
↑↑↑↑ ↓↓↓↓ (Out of range)
In case the analyzer displays arrows up or arrows down instead of sample results, the
concentration of the sample is outside of the measurement range.
Possible causes and remedies
o If the sample is a urine sample, arrows up instead of the K
+
result indicate that
further dilution of the specimen is required (except 9110).
o Check for proper sample preparation.
o Ensure that the sample is correctly aspirated into the measuring chamber and
ensure small air bubbles are not present.
o Check for proper aspiration of Standard A.
o Check the programmed conversion factors. The sample result has to be within the
measurement range after conversion factors have been applied.
o Check the level of Filling Solution in the pH Electrode.
↑ ↓ (Temparature out of range)
On the 9140, 9180 and 9181 models, the calibration report will print an arrow up or
down instead of the actual temperature, if the temperature measured is out of range
(10.0°C - 40.0°C). The temperature sensor is located in the right side electrode holder.
Possible causes and remedies
o Ensure that sample sensor cable is securely plugged in.
o Check whether room temperature is within specified limits (15°C to 32°C / 60°F
to 90°F).
o Perform temperature adjustment procedure.
o Replace SBC board or right side electrode holder.