7.2.3 Flow rate indication is not stable
Is power supply voltage
within the specified range?
Are cables securely connected?
Is the flowmeter grounded
with 100Ωor less ground
Is the detector pipe filled
Is the fluid carrying bubbles?
Is there high-voltage or large
current cable or equipment
near the flowmeter?
Contact your nearest Toshiba
Use a power supply within the
Connect each cable securely to the
Ground the flowmeter with a copper
braid or wire(5.5 mm² minimum) to a
good earth ground
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.
－ ４２ －
or less ground resistance)