How can I get my 1720E out of Service Mode?
1720E Service Mode
If the 1720E turbidimeter is put into the Service Mode, the readings on the display will be blinking and the 4-20 mA readings will not be updating. This Service Mode cannot be escaped by cycling power or rebooting the controller. The user must go to the 1720E Sensor Setup > Diag Test Menu and select Service Mode > Off to escape the mode.