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Troubleshooting
VI-11
Thermo Scientific Orion 2120XP Calcium Hardness Analyzer User Guide
Malfunction Possible Cause
Remedy
Noisy
Blocked junction on
reference electrode
Make sure electrolyte is flowing properly.
Calcium or reference
electrode failure
Check the cable connections and location of
wiring to terminal strip. Refer to
Chapter II.
Temperature probe failure Disconnect ATC. Temperature should read
25 °C
(E101). Replace if necessary.
Air pump failure
Check the air flow for a steady stream of
bubbles and replace if necessary.
Calibration standard
carryover
Disconnect the air pump intake tube. Rinse
the flow cell and electrodes with deionized
water by lifting the flow cell cap. Reconnect
the air pump.
Faulty electrode cables
Replace electrode cables.
Excessive Drift
Sample concentration
varying
Check sample status. Perform a span check
and if span check passes, the analyzer is okay.
Blocked junction on
reference electrode
Make sure the electrolyte is flowing properly
and the bottle is vented.
Calcium or reference
electrode failure
Check the cable connections and location of
wiring to terminal strip. Refer to
Chapter II.
Reference electrode
filling solution empty or
incorrect solution used
Use Cat. No. 181073 reference electrode
filling solution.
Diffusion tubing burst
Observe the liquid level in the reagent bottle.
If the liquid level rises, replace the reagent
and diffusion tubing. The tubing connector
may need replacement. Refer to
Chapter II.
Temperature probe failure Disconnect ATC. Temperature should read
25 °C
(E101). Replace if necessary.
Low Flow Rate
Sample pressure below
8 psi
Check the sample pressure. If it is less than
8 psi, increase the pressure. Refer to
Chapter II.
Pressure regulator set
too low
Increase the pressure by pulling on the
red locking ring and turning the black knob
clockwise. Refer to
Chapter II.
Inlet filter clogged
Replace or clean the filter.
Restrictor tubing crimped
or clogged
Replace the restrictor tubing. Refer to
Chapter II.
Troubleshooting
Matrix