Omron M1 Plus Instruction Manual page 30

5.Handling Errors and Problems
Problem
Nothing happens when
you press the buttons.
Other problems.
30
Cause
The batteries are empty.
The batteries have been
inserted incorrectly.
Press the I/O 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.
Refer to section 2.1.
Insert the batteries with
the correct (+/ -) polarity.
Refer to section 2.1.