Siemens RAPIDLAB 248 Operator's Manual page 121

Installation
Installing the pH, pCO
1. Check the level of solution in the pH sensor. It should be full, with a
2. Raise the front cover. Slide the measurement block catch down and
3. Insert the sensors in the following order:
Installing the Reference Sensor
1. Refer to the reference sensor package insert for filling instructions.
2. Swing the block tensioner to the right and insert the reference
Connecting the Pump Tubing
1. Tension the sample pump tubes (lefthand pump) by pulling the
2. Connect the sample tube to the measurement block tube, and the
3. Connect the rubber connector to the manifold.
4. Tension the reagent pump tubes (righthand pump) by pulling the
5. Connect the rubber waste cap connector to the manifold.
6. Make sure there are no kinks in the pump tubing.
7. Date the pump tubing labels a maximum of three months ahead.
small air space at the top.
If necessary, empty and refill using pH sensor fill solution. Follow
the instructions on the fill solution pack. Make sure there are no air
bubbles trapped in the bottom of the sensor.
The gas sensors are sealed and cannot be refilled. Tap them
NOTE:
to release any trapped air bubbles before installation.
raise the block cover.
pO pCO grounding block pH
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The grounding block is in the Spares box.
NOTE:
Slide the sensors into place, making sure that the sensor contacts
align with the contacts in the block.
It is particularly important to make sure there are no air bubbles
trapped in the left chamber of the sensor cassette immediately
above the sample pathway. Do not overfill the righthand reservoir
chamber.
sensor from the side. Push the bottom of the sensor to click it into
place. Make sure all the sensors are seated correctly, then push the
tensioner firmly home to make a good seal. Lower the block cover,
snapping it into place.
tube lugs under the tensioners.
waste tube to the manifold.
tube lugs under the tensioners.
and pO Sensors
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