9 
Batteries Installation and Replacement: 
1. Please make sure the device is 
turned off. Press the edge of the 
battery cover and push upward. 
Note: Replacing the batteries does 
not affect previous test results stored 
in the device, but you may need to 
update the settings. 
 
2. Remove the battery cover then 
remove the batteries inside. 
Note: Do not use different type, date 
or brand name batteries together. 
Use only new batteries of the 
required size and type. 
 
 
 
3. Insert two 1.5V AAA size alkaline 
batteries. Make sure the "+" 
(positive) and "–" (negative) ends 
match those indicated in the battery 
compartment. If inserted correctly, 
you will hear a "beep."