6*1 preparatory cheek, Placing system on-stream, Toshiba – Toshiba LF494 User Manual
Page 31: Caution, Operation
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TOSHIBA
6 F 8 A 0 7 7 4
6. Operation
A
CAUTION
Do not touch the LF494/LF404 main body when
high temperature fluid i.s beii^ measured.
Q
Thc
fluid
raises
the
main
body tempera lure and can
cause burns when touched.
DONT
6*1 Preparatory cheek
Follow the procedure described below to prepare before starting the (low tneasurerrienl.
System Check
Check the wiring between the converter and related instruments.
Make sure all Ihc bolts of connection flanges on which the flowmeter is mounted
securdy tightened.
Make sure the direction of flow arrow is in accordance with actual flow.
Make sure the flowmeter is grounded with IDO ohm or less ground resistance.
Make sure the converter housing covers are securely tightened.
Placing System On-Stream
l.ct the fluid go through the delector pipe. When the detector is filled with the
fluid, stop the fluid and keep it still in Ihc detector pipe.
Supplying Electric Power
Make sure the powder supply is as specified.
Checking Converter Parameters
Check the configuration parameter settings, Refer to Chapter 7, "LCD Display
and Controls,” Chapter
8
, “Configuration Parameter Selling/’ and Chapter 11,
“Communications Function/'
Zero Adjustment
Wail for 30 minutes to warm up the flowmeter, 1 hen 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
z e r o
adjustment as listed above, let the fluid go
through the detector pipe. Output (4-20 mA dc) directly proportional to the flow rale can be
obtained.
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