42
9. Troubleshooting
Problem
Cause
Solution
Power on but
a) Batteries not in place.
a) Check that batteries are in
no display
place and making good
contact.
b) Batteries not in correct
b) Reinsert batteries with
polarity (+ and –).
correct polarity.
c) Weak batteries.
c) Replace batteries or attach
optional AC adapter.
Unstable
a) Air bubbles in probe.
a) Tap probe to remove bubbles.
readings
b) Dirty probe.
b) Clean the probe and
recalibrate.
c) Probe not deep
c) Make sure sample entirely
enough in sample.
covers the probe sensors.
d) External noise pickup
d) Move or switch off
or induction caused by
interfering motor.
nearby electric motor.
e) Broken probe.
e) Replace probe.
Slow response
a) Dirty/Oily probe.
a) Clean probe. See "Probe
Care & Maintenance",
page 41.