7 Commissioning and measuring operation

Before switching on the FMG90 for the first time, please follow the instructions in the following section.

7.1Commissioning

Check that

ˆthe FMG90 has been installed correctly and that all screw connections are sealed.

ˆthe electrical wiring has been connected properly.

ˆthe measuring system is vented by flushing.

ªSwitch on the supply voltage.

If the red LED lights permanently; then the FMG90 is ready for use and goes into measuring operation.

7.2Measuring operation

The red LED is constantly lit to indicate that the FMG90 is operational.

The green LED blinks according to the frequency of the output signal.

This blinking is not perceptible to the human eye at frequencies above 30 to 40 Hz, so the green LED appears to be constantly lit.

Frequency output:

The frequency output provides a flow- proportional PNP/NPN square wave signal.

8 Maintenance

Maintenance:

The FMG90 is maintenance-free and cannot be repaired by the user. In case of a defect, the device must be replaced or sent back the manufacturer for repair.

CAUTION! Material damage!

When opening the device, critical parts or components can be damage.

ªNever open the device and perform any repair yourself.

Cleaning:

Clean the FMG90 with a dry or slightly damp lint-free cloth. Do not use sharp objects or aggressive agents for cleaning.