Operation, Don’t, 1 preparatory check – Toshiba LF470 User Manual
Page 26: System check, Placing system on-stream, Supplying electric power, Checking converter parameters, Zero adjustment, On-line measurement, Caution
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TOSHIBA
, 6 F , 8 A 0 , 8 , 0 , 2 ,
6. Operation
A
CAUTION
Do not touch the LF470 main body when high
temperature fluid is being measured.
The
fluid raises the main
body temperature and can
cause
burns
when touched.
DON’T
6.1 Preparatory check
Follow the procedure described below to prepare before starting the flow measurement.
System Check
Check the wiring between the converter and related instruments.
Check the wiring between the converter and the detector.
Make sure all the bolts of connection flanges on which the flowmeter is mounted
securely tightened.
Make sure the direction of flow arrow is in accordance with actual flow.
Make sure the flowmeter is grounded with 100 ohm or less ground resistance.
Make sure the converter housing covers are securely tightened.
Placing System On-Stream
Let the fluid go through the detector pipe. When the detector is filled with the
fluid, stop the fluid and keep it still in the detector pipe.
Supplying Electric Power
Make sure the power supply is as specified.
Checking Converter Parameters
Check the configuration parameter settings. Refer to Chapter 7, “LCD Display
and Controls,” Chapter 8, “Configuration Parameter Setting,” and Chapter 11,
“Communications Function.”
Zero Adjustment
Wait for 30 minutes to warm up the flowmeter. Then making sure the fluid holds
still in the detector pipe, starts the zero adjustment.
Refer to 6.2, “Zero Adjustment.”
On-line measurement
After checking the items and conducting the zero adjustment as listed above, let the fluid go
through the detector pipe. Output (4-20 mA dc) directly proportional to the flow rate can be
obtained.
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