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4Ć83
Troubleshooting the System
NOTE:ĄĂUse 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:ĄĂTo 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.
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.
!