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Toshiba lf546 User Manual

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6 F 8 A 0 9 3 4  
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 Ω or less ground 
resistance? 
Ground the flowmeter with a 
copper braid or
 
wire(5.5
 
mm²
 
minimum)
 
to a
 
good
 
earth
 
ground
 
(100
Ω
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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