Product Manual

Wall Mounted Ultrasonic Flowmeter---User Manual
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should see three terminal blocks which pins are labeled as 11,12 and 13.Normally, pin 13 should
be connected to your Earth ground. Make sure your Earth ground is good. Pins 11 and 12 should
be connected to Neutral and Line, respectively.
If 24VDC power source is used, its positive lead and negative lead should be connected to pin 21
and 22.
Please refer to the figure in Appendix 8.1 for more wiring information.
2.3.Power Up
The wall mounted flowmeter doesn’t have power ON/OFF switch. When it is connected to power,
it will start to run automatically.
WARNING!
Before connecting the device to power source, please do a final check to make sure all the
wiring are corrected and all the local safety codes are followed.
After the power is turned on, the flowmeter will run a self-diagnostic program, checking first the
hardware and then the software integrity. If there is any abnormality, corresponding error
messages will be displayed. (Please refer to chapter 7 for more error code explanations.)
After successful internal check, the flowmeter will display menu window 01(short for M01), or
the menu window which was active at last power off. It will also start the measurements by using
the parameters configured last time by the user or by the initial program.
The flow measurement program always operates in the background of the user interface. This
means that the flow measurement will keep running regardless of any user menu window
browsing or viewing. Only when the user enters new pipe parameters will the flowmeter change
measurement to reflect the new parameters changes.
When the power is turned on or new pipe parameters are entered, the flowmeter will enter into a
self-adjusting mode to adjust the gain of the receiving circuits so that signal strength will be within
a proper range. By this step, the flow meter finds a the best system gain which matches the pipe
material and fluid type. If the self-adapting process is completed successfully, letter ’R’ will be
displayed.
When the user adjusts the position of the installed transducers, the flow meter will re-adjust the
signal gain automatically. Figure 2.1 keypad
2.4. Keypad operation
The keypad of the flowmeter has 16 keys (Figure 2.1).
Keys [0]~[9] and [
.] are number keys.
Key [#/-] is the going DOWN key when the user wants
to go to the lower menu window. It also works as - key