Accumet AP74, Operating Instructions Manual, Page: 43 / 48

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10. 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.
Unstable a) Insufficient electrolyte a) Fill probe with reference
readings in probe. electrolyte.
b) Dirty probe. b) Clean the probe and
recalibrate.
c) External noise pickup c) Move or switch off
or induction caused by interfering motor.
nearby electric motor.
e) Broken probe. d) Replace probe.
Slow response a) Dirty membrane. a) Clean probe. See "Probe
Care & Maintenance",
page 40.
Not responding a) HOLD mode in operation. a) Cancel HOLD mode.
to key press
b) Damaged key pad. b) Return to dealer.
c) Internal program error. c) Reset all internal programs
by reinserting batteries.