Hach FH950 Manual Básico Del Usuario página 21

Message or problem
Sensor data is known to be not correct
or not accurate
Sensor is not recognized
Display is dim or is not visible
Data is not available or access to the
data is not possible
Meter is unresponsive
Solution
Clean the sensor and test.
Check the sensor connection. Make sure that the lock nut on the
connection port is tight (finger-tighten only).
Push a key on the keypad.
Make sure that the USB option (Main Menu) is set to Mass Storage.
Push and hold the power button for at least 3 seconds. This de-
energizes the meter. Energize the meter again.
Note: Do not use this method to power off while in normal operation or if the file
access icon is visible in the display.
English 21