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Bayer HealthCare Rapidlab 800 User Manual

Page 371

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4Ć83

Troubleshooting the System

NOTE:ĄĂ

Use wash reagent that has not expired and has not been open longer

than 60 days. Do not install the wash reagent bottle that you use for this
procedure on the system.

d. If the obstruction is not removed, fill the syringe with fresh wash reagent

and inject the wash reagent into the sensor sample path.

e. Dry thoroughly and reinstall the gas sensors, ensuring that the O-rings are

in place.

CAUTION:ĄĂ

To avoid damage to the sensors, use the clot-removal line

carefully. Be particularly careful with the pH sensor.

4.

Inspect the reference sensor, the sample ground/temperature sensor, pH sensor,
and the Na

+

sensor for obstructions:

a. Remove the sensors one at a time and inspect the sample path for

obstructions.

b. Cut a piece of tubing, or use a capillary adapter, and place the tubing on the

tip of the syringe.

c. Push a 0.558 mm (0.022-inch) diameter clot-removal line through the

sensor to remove obstructions, as shown in Figure 4-17.

Figure 4Ć17.ā Removing Obstructions from a pH, Na

+

, Reference, or Sample

Ground/Temperature Sensor on an 850

Push the spring-loaded
latch to the right.

Lift the sensor up
and out of the
measurement module.

Clot-removal
Line

d. If the obstruction is not removed, cut a piece of tubing, or use a capillary

adapter, and place the tubing on the tip of the syringe.

e. Place the syringe against the sensor sample path and inject air through the

sensor to remove obstructions.

f. If the obstruction is not removed, fill the syringe with fresh wash reagent

and inject the wash reagent into the sensor sample path.

!