Siemens Rapidlab 1200, Operator'S Manual, Page: 175 / 448

Rapidlab 1200 Operator’s Guide: Maintenance 5-33
02087462 Rev. V
c. Remove the cylinder, so the needle remains attached to the vial.
5. Rinse the sensor.
a. Insert the needle, attached to the vial, into the sensor.
b. Gently squeeze the fill solution vial until the sensor is full of solution.
c. Eject the fill solution so the sensor is empty.
Dispose of the fill solution according to your institution’s protocol.
6. Fill the sensor.
a. Squeeze the fill solution vial until a drop is emitted or remains at the tip of
the needle.
This helps minimize the occurrence of bubbles once the needle is inserted
in the sensor.
b. Insert the needle, attached to the fill solution vial, until the needle is near
the bottom of the sensor.
c. Slowly raise the needle as you gently squeeze the fill solution vial, until
the sensor is nearly full.
7. Install the internal reference electrode into the internal electrode compartment
and screw the electrode into place.
8. Inspect the sensor for bubbles.
As the temperature of the sensor rises to 37
°
C, gas driven from the solution
causes bubbles.
9. Clean and inspect the sensor:
a. Tap the front face of the sensor with your knuckle to remove any bubbles.
If bubbles reamain in the sensor, see Step 3 of Verifying Sensor
Performance ‚ page 5-31.
b. Wipe any excess fill solution from the exterior of the sensor using a
lint-free tissue.
10. Reinstall the sensor.
Refer to Installing the Sensor ‚ page 5-31.
11. Verify sensor performance.
Refer to Verifying Sensor Performance ‚ page 5-31.
For these sensors... Add...
pH
Na
+
, K
+
, Cl¯, and Ca
++
until sensor is almost full but with a small space (1 mm) at
the top
CAUTION:
Do not touch the internal electrode wire. The wire is fragile and is
easily damaged.