Giving message next service is due

hi

we have same message in the screen

i think that is advice of hach company for remember you principle of service.

Nhel:

the message is an internal instrument  reminder to perform service.It appears after a certain amount of lamp usage. It is not necesaary to do anything unless you are seeing problems in operation of unit.

to delete the message:on main menu screen,select "system checks",then "service time",select "off"