8-7
SYMPTOM:
ERROR: Unable to Calibrate
(Continued)
POSSIBLE CAUSE: Failing enzyme membrane.
ACTION: Perform daily operational checks and replace membrane(s)
if necessary.
SECTION: 3.4
POSSIBLE CAUSE: Probe surface fouled.
ACTION: Clean probe surface.
SECTION: 7.5
POSSIBLE CAUSE: Temperature Probe (auxiliary electrode) fouled.
ACTION: Clean probe surface.
SECTION: 7.5
SYMPTOM:
ERROR: Undetectable Fluid
POSSIBLE CAUSE: Low calibrator solution.
ACTION: Install new calibrator.
SECTION: 2.3
POSSIBLE CAUSE: Pinched, blocked, leaking or disconnected tube.
ACTION: Fix or install new tubing.
SECTION: 7.6
POSSIBLE CAUSE: Calibrator pump not operating properly.
ACTION: Replace tubing.
SECTION: 7.6
POSSIBLE CAUSE: Fluid not conductive.
ACTION: Use saline as diluent.
SECTION: 4.8
POSSIBLE CAUSE: Low sample level.
ACTION: Run sample at manual position.
SECTION: ---
SYMPTOM:
Blank Printout
POSSIBLE CAUSE: Printing on wrong side of paper.
ACTION: Install paper correctly.
SECTION: 2.6
POSSIBLE CAUSE: Using wrong type of paper.
ACTION: Install correct thermal paper (YSI 2751).
SECTION: 2.6
SYMPTOM:
Fail FCN Test
POSSIBLE CAUSE: Damaged or old membrane.
ACTION: Replace membrane.
SECTION: 2.4