Instruction manual
19
UT381/382 Instruction Manual
VII Maintenance
Warning
During replacing battery or measuring, keep the sensitive mirror from scratch or
dirt to avoid damaging the mirror or inuencing the measuring precision; and do
not charge the replaced battery to avoid explosion and safety accident!
1. Battery installation and replacement
When “ ” is displayed on the luminometer, replace the battery immediately.
Replace the battery by following procedures:
● Power off
● Loosen the screw of battery cover and take it off.
● Replace with a new 6LF22 9V 1604A battery, please use battery with the
same model, and do not use unauthorized battery.
● Pay attention to the anode “+” and the cathode “-”. After completing
installation, install the cover and tighten the screw.
2. General maintenance
● When the surface of luminometer is dirty, clean with wet cloth and neutral