Beckman Coulter UniCel DxC 600, Instructions For Use Manual

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A13914AF
9-68
Maintenance
As-Needed/As-Required Maintenance
Replace the Sodium Measure/Reference Electrode
The Sodium Measuring Electrode must be prepared before installation of a new electrode.
Materials Required:
•
Beaker
•
Na/K-free filter paper
•
Phillips screwdriver
Follow the steps below to prepare the Sodium electrode (PN 668295).
1
In a small beaker, prepare a soft bottom lining using crumpled multiple layers of Na/K-free
filter paper (2).
Pour ISE Reference solution (do not dilute) into the beaker to a depth not to exceed two inches
(50 mm) (1).
Figure 9.46
2
Unpack a new sodium electrode. Carefully remove black protective cap covering glass tip.
IMPORTANT
If maximum soaking time is not allowed, the new electrode may require a few hours of
operation to achieve complete electrical stability. During this period, more frequent calibration than
normal may be required in response to system error messages. Assay results are not compromised during
this time.
3
Soak the electrode:
• 1 hour minimum
•
24 hours maximum