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Six-Month Maintenance
Replace Calcium and Potassium Electrode Tip
UniCel DxC Systems Instructions For Use A13914
Maintenance
October 2005
Page 10-61
10
6
Install a new O-ring on the presoaked potassium and/or calcium electrode
tip and screw onto electrode body. Install the new quad-ring on the tip of
the new electrode.
7
Thoroughly dry the electrode port with lintless tissue.
8
Replace retainer nut on the electrode and insert the new electrode into
electrode port. Turn electrode retainer nut clockwise until finger-tight.
9
To test for proper seating of electrode gently pull on electrode body. The
electrode assembly should not move. If electrode moves, remove it and
install it once again. Check for an extra or missing quad-ring if installation
is difficult.
10
Reposition flow cell on the mounting panel and tighten the one retaining
screw. Reconnect electrode cable to the appropriate terminal being careful
not to bend connecting pin.
11
Select <OK> in the Maintenance confirmation pop-up window when the
electrode service has been completed and the electrode has been properly
replaced.
NOTICE
Reagents will immediately prime through the flow cell.
While system is priming, observe flow cell for leaks. Stop the priming if
any leaks are noticed and correct the problem.
12
When system has completed priming, select <Close> to exit the procedure.
13
CAUTION
Pinching Hazard. When lowering the ISE module, keep fingers clear.
Lower the ISE module down into the cavity by releasing the locking pin.
Be careful not to pinch tubing as the ISE module is lowered.
14
Reinstall the ISE module cover.
15
Calibrate all the ISE chemistries. If the calcium electrode tip was replaced,
proceed to Step 16.
NOTICE
Reference drift for the new electrodes may be observed during the first
4-6 hours after electrode replacement. Results will
not
be compromised.
Recalibrating the chemistry during this time period will help stabilize the
electrode.
Step
Action
, continued
(3 of 4)