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3 flow rate indication is not stable – Toshiba GF632 User Manual

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6F8A0883

7.2.3 Flow rate indication is not stable
















































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
Ωor less ground
resistance?

Ground the flowmeter with a copper
braid or

wire(5.5

mm²

minimum)

to a

good

earth

ground

.

(100ohm 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

START

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.

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