GF U3000 V2 Betriebsanleitung Seite 33

User Manual
NOTICE
The SENSOR SELECTION menu can be entered by use of the Up/Down scroll keys. This allows the type and mode of the sensors
being used to be selected. This menu will be entered automatically if the entered pipe OD and/or temperature are not valid for the
currently selected sensors.
NOTICE
Do not press the enter key until the correct transducers are fitted and connected to the instrument.
If the data contains a mistake, press the delete key to return to the main menu and restore the previous settings.
NOTICE
The sensors screen will be displayed automatically if the entered pipe od and/or temperature are not valid for the currently select-
ed sensors.
5.1.2 Attaching and connecting the transducers
1. Fit the designated sensors to the pipe using the appropriate guide rails as described in section 6.2 Attaching the
transducers. Take great care to set the separation distance as accurately as possible.
2. Connect the red and blue coaxial cables between the sensors and the test instrument, ensuring that the red connector on
the instrument is connected to the 'upstream'
sensor.
5.1.3 Taking a flow reading
Please wait checking signals
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*
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READ FLOW
2.754
+ 27.0
-
0.1
The Read Flow screen is used most frequently during normal monitoring operation. It shows the instantaneous fluid flow together
with totalised values (when enabled).
If the flow reading exceeds a value of +/-99999 in the selected units then the display will change to exponential (or scientific)
notation. This is used in Microsoft™ Excel™ and many other
software packages.
For example, if the display reads 1.0109E5 l/min, this represents 101,090 l/min (1.0109 × 100,000). Note the number of zeros in
the multiplier corresponds to the number following the E on the display. Alternatively, you may select another unit by pressing the
UNITS (7) key. With units of l/sec, the previous example would read 1684.8 l/sec, hence scientific notation would not be required.
There are no limitations on the use of these larger flow values with regards to logging of data and setting the current and digital
outputs. Values are automatically saved in scientific form in any case.
*
DD-MM-YY HH:MM:SS
Q60.0%
1/min
1/min..
1/min..
1. Once the transducers have been fitted and connected,
press the ENTER key on the Summary screen.
2. This will take you to the FLOW READING screen via a
signal-checking screen.
3. Check that the indicated signal strength on the left of the
screen is at least 2 bars (ideally 3 or 4). If less than 2 bars
are shown it indicates there could be a problem with the
transducer spacing, alignment or connections; or it could
be due to an application problem.
4. The Q value indicates the signal quality and should have a
value of 60% or greater. Signal Q is a mixture of the Signal
to Noise Ratio (SNR) and signal timing accuracy. This is the
best measure of system performance
Operation of the device
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