Rules For Safe OperationBefore using the Meter inspect the case. Do not use the Meter if it is damagedor the case (or part of the case) is removed. Look for cracks or missing plastic.Do not use or store the Meter in an environment of high temperature, humidity,explosive, inflammable and strong magnetic field. The performance of theMeter may deteriorate after dampened.Do not point laser directly at eye.Replace the battery as soon as the battery indicator appears. When thebattery is between 4.5V ~4.8V, the battery indicator appears. When thebattery is between 4.3V ~ 4.5V, battery indicator blinking, the Meter will beturned off after 1 minute.When opening the battery door, must make sure the Meter is power off.When servicing the Meter, use only the same model number or identicalelectrical specifications replacement parts.The internal circuit of the Meter shall not be altered at will to avoid damageof the Meter and any accident.Model UT371/372: OPERATING MANUAL5