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6. Diagnostics
6.1 Diagnostic Options
6.1.1 Serial Number
The serial number screen allows the user to see the serial number for their product. This
number will also be shown on the physical label on the outside of the display enclosure. This
number may be needed if you contact FLOMEC for technical assistance.
6.1.2 Input Frequency
The input frequency screen will display the current input frequency in Hertz on the LCD
screen. This number is unaffected by any settings configured into the display by the user, so is
therefore independent of any mistakes made in setting up the product. The input frequency
display can be useful when troubleshooting.
6.1.3 Voltage
The voltage display indicates to the user if the display is running on battery power, or if there
is an externally connected DC voltage supply of sufficient voltage. This can be useful in
situations where the digital output or backlight are not functioning, to determine if sufficient
voltage is available at the external power terminals.
6.1.4 Test Output
The “test output” function allows the user to force an output pulse signal of 10Hz without
the requirement for any flow in their system. This function is very useful when commissioning
an external instrument such as a fuel management system, PLC, or datalogger. By enabling the
“test output” function the user will be able to test electrical connections and FMS/PLC settings
without the need to run pumps or open valves.
This function is also very useful when troubleshooting a system where a PLC or fuel
management system is not receiving a pulse signal from the flowmeter display. By enabling the
“test output” function the user can isolate the issue to either the input side or the output side
of the RT40.
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