YSI 2900 - Troubleshooting Chart

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Troubleshooting Chart 11.2
SYMPTOM: MEASUREMENT ERROR: IB Level Error
POSSIBLE CAUSE: Pinched, leaking or disconnected tube.
ACTION: Fix or replace tubing.
SECTION: 9.4.7 Pump Tubing Replacement
POSSIBLE CAUSE: Sipper misaligned.
ACTION: Check Sipper alignment.
SECTION: 4.5 Align Sipper
POSSIBLE CAUSE: Sipper pump not operating properly.
ACTION: Replace sipper pump seals.
SECTION: 9.4.4 ISE Cleaning
POSSIBLE CAUSE: Stir bar not in sample module.
ACTION: Install stir bar.
SECTION: 9.4.1 Sample Module Cleaning
POSSIBLE CAUSE: Stir speed too fast or too slow.
ACTION: Adjust stir speed.
SECTION: 7.2.4 Stirbar
POSSIBLE CAUSE: Newly installed enzyme Membrane.
ACTION: Enter probe diagnostics and check probe currents.
SECTION: 7.2.3 Modules
POSSIBLE CAUSE: Newly installed probe.
ACTION: Enter probe diagnostics and check probe currents.
SECTION: 7.2.3 Modules
POSSIBLE CAUSE: Power disruption.
ACTION: Enter probe diagnostics and check probe currents.
SECTION: 7.2.3 Modules
POSSIBLE CAUSE: Failing enzyme membrane.
ACTION: Perform daily operational checks and replace membrane
if necessary.
SECTION: 5.1 Perform Daily Operational Checks, 4.9 Install Membranes and ISEs
POSSIBLE CAUSE: Enzyme Probe surface fouled.
ACTION: Clean probe surface.
SECTION: 9.4.3 Enzyme Probe Cleaning
POSSIBLE CAUSE: Auxiliary electrode fouled.
ACTION: Clean Auxiliary electrode surface (temperature probe) with isopropyl alcohol.
POSSIBLE CAUSE: Sample may contain an interfering substance.
ACTION: Attempt to confirm interference.
SYMPTOM: MEASUREMENT ERROR: PL Limit Error
POSSIBLE CAUSE: Sipper misaligned.
ACTION: Check Sipper alignment.
SECTION: 4.5 Align Sipper
POSSIBLE CAUSE: Stir bar not in sample module.
ACTION: Disassemble sample module and reinstall stir bar.
SECTION: 9.4.1 Sample Module Cleaning