Omron M2 Compact Instruction Manual page 27

Problem
Nothing happens
when you press the
buttons.
Other problems.
5.Handling Errors and Problems
Cause
The batteries are
empty.
The batteries have
been inserted
incorrectly.
Press the O/I START button and repeat
measurement.
If the problem continues, try replacing the
batteries with new ones.
If this still does not solve the problem, contact
your OMRON retail outlet or distributor.
Remedy
Replace the batteries
with new ones.
Insert the batteries with
the correct (+/ -)
polarity.
EN
27