Xylem FM500 ULTRASONIC FLOW METERS - Manual (Page 23)

Page 23
In the Transducer Positioning State, the flowmeter waits for the transducers to be
correctly positioned on the pipe.
The flowmeter indicates that it is in the Transducer Positioning State as follows:
You must acknowledge that the transducers are correctly positioned by either pressing
the SETUP button on the motherboard or the DONE soft button on the display, if fitted.
The flowmeter will then return to the Startup state, see section 4.3 above, from
which you can again enter Setup Mode or perform Zero Calibration or, by allowing
the 7 second timeout to elapse, let the flowmeter enter Run Mode and begin flow
measurement.
When operated in the Transit Time measurement mode, the separation distance of the
transducers is computed by the flowmeter from the information in the Transducer
Setup branch of the Configuration Menu. The correct separation distance is
dependent on the pipe OD, pipe wall thickness, pipe type and chosen mounting mode. If
the Doppler measurement mode is selected (by the motherboard switch), the separation
of the transducers (along the pipe axis) is always zero.
When factory configured, the separation distance and mounting mode is printed on the
serial label. The separation distance will also be displayed on the LCD display or on the
optional communications PC software, in either inches or millimeters depending on the
Measurement Units chosen in Transducer Setup. If the meter has not been factory
configured, or if a new configuration is required, the pipe OD, pipe wall thickness, pipe
type, fluid type and chosen mounting mode configuration data must be input before
proceeding. See section 5.3 for instructions on how to create or modify a configuration.
If the flowmeter has neither an LCD display nor a connected user PC Software
application, then the Configuration information cannot be changed by the user so the
separation of the transducers will not change from the factory setting.
Model 1: two center yellow LEDs flash at 1
Hz.
Model 2: as for Model 1, plus the screen
presents instructions to the user as shown.
Model 3: as for Model 2.
TRANSDUCER
POSITIONING STATE
DONE
Position the transducers
at a separation distance of:
Transducer Positioning …
Information Screen
2.489416 inches (”W” Mount)
Firmware Version, A01.00.00
Press DONE when this is complete
4.5
Transducer
Positioning
State
Ultrasonic Flowmeter