429. TroubleshootingProblem Cause SolutionPower on but a) Batteries not in place. a) Check that batteries are inno display place and making goodcontact.b) Batteries not in correct b) Reinsert batteries withpolarity (+ and –). correct polarity.c) Weak batteries. c) Replace batteries or attachoptional AC adapter.Unstable a) Air bubbles in probe. a) Tap probe to remove bubbles.readings b) Dirty probe. b) Clean the probe andrecalibrate.c) Probe not deep c) Make sure sample entirelyenough in sample. covers the probe sensors.d) External noise pickup d) Move or switch offor induction caused by interfering motor.nearby electric motor.e) Broken probe. e) Replace probe.Slow response a) Dirty/Oily probe. a) Clean probe. See "ProbeCare & Maintenance",page 41.
