Flow Rate Indication Is Not Stable - Toshiba LF620F Instruction Manual

13.2.3 Flow rate indication is not stable.

START
Is power supply voltage
within the specified range?
Are cables
connected?
Is the flowmeter grounded
with 100 Ω or less ground
resistance?
Is the detector pipe filled
with fluid?
Is the fluid carrying
bubbles?
Is there high-voltage or large
current cable or equipment
near the flowmeter?
Contact your nearest Toshiba
representative.
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Use a power supply within the
specified range.
Connect each cable securely
to the terminal board.
Ground the flowmeter with a
copper braid or wire(5.5 mm²
minimum) to a good earth
ground (100 Ω
resistance).
Design piping so that the
detector pipe is filled with
fluid all the time.
Design piping so that the fluid
does not carry bubbles.
Install the flowmeter away
from equipment producing
electromagnetic or
electro- static interference.
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.
6 F 8 A 0 9 2 8
or less ground