Figure 13

2: Battery installation or replacement
   1 6F22 9V battery shall be supplied for the 
    product. Please install or replace the battery by 
    following sequence:
a. Please remove testing rod in the input end 
    during shutdown.
b. To let panel face downwardly, loosen screws 
    on the cell box, extract cell cover then remove 
    cell box.
c. To remove old battery from cell box for 
    installation of new battery according to polarity 
    instructions.
d. Please use the same model of battery. Please 
    do not install improper battery.
e. To install cell cover and lock screws after 
    installation of new battery.