Analyzer Operation
III-36
Thermo Scientific Orion 2120XP Calcium Hardness Analyzer User Guide
1. Replace the diffusion tubing if the sample flow was off for more than
a few days. Tubing becomes brittle with long-term exposure to the
reagent. If the age of the reagent is not known, replace it and note the
date in the maintenance records. Re-install the reagent bottle on
the analyzer.
2. Restore sample flow to the analyzer. If necessary, adjust pressure and
flow rate through the analyzer to 40 mL/min.
3. Remove the protective cap from the reference electrode. Re-install the
electrodes on the analyzer. Be careful not to disconnect the reservoir
tubing from the reference electrode sidearm.
4. Allow the analyzer to stabilize for approximately 1 hour and then
recalibrate. Refer to
Chapter IV, Performing a DKA Calibration
.
Start-Up