Nieaf Instruments NI349PR, Manual

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When the low battery symbol is displayed on the LCD, replace the old battery with new battery.
a.Turn the power off and remove the test leads from the clamp meter.
b.Remove the screws of the bottom case.
c.Lift and remove the bottom case.
d.Remove the old battery.
e.Insert new 9V battery.
f.Replace the bottom case and secure the screws.
WARNING
Do not touch or adjust any parts inside the clamp meter when the bottom case is open.