Toshiba LF516 - Manual (Page 143)

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13.2.3 Flow rate indication is not stable.
Note 1: If the detector tube is not filled with
operating fluid, the flow is indefinite and
measurement is impossible. Be sure to fill
the detector tube with operating fluid
before starting measurement.
Is power supply voltage
within the specified range? Use a power supply within the
specified range.
Are cables securely
connected?
Connect each cable securely
to the terminal board.
Is the fluid carrying
bubbles?
Design piping so that the fluid
does not carry bubbles.
Install the flowmeter away
from equipment producing
electromagnetic or
electro- static interference.
Contact your nearest Toshiba
representative.
NO
NO
YES
YES Is there high-voltage or large
current cable or equipment
near the flowmeter?
Is the flowmeter grounded
with 100
or less ground
resistance?
Ground the flowmeter with a
copper braid or
wire(5.5 mm²
minimum) to a good earth
ground (100 or less ground
resistance).
NO
YES
YES
YES
NO
NO
Is the detector pipe filled
with fluid?
Design piping so that the
detector pipe is filled with
fluid all the time.
NO
YES
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