Dwyer UXF3 - Manual (Page 40)

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4.7. Zero Adjustment
Description
z Zero point is calibrated.
Settable range:
CLEAR : Clears the zero point calibration value to "0".
Used in case the flow cannot be stopped when calibrating the zero point.
Note 1) Where possible, stop the flow and carry out "SET ZERO" stated below.
Otherwise, an error may occur in the zero point.
SET ZERO : A point where "SET ZERO" is set will be regarded as zero flow. The flow should be stopped with a full pipe condition
when calibrating the zero point.
Note 2) The flow must completely be stopped.
Otherwise, the actual flow rate value upon completing "set zero" becomes a constant reading offset error .
It takes ten seconds to several tens of seconds to complete adjustment, depending on pipe diameter.
For actual keying, refer to the typical operation indicated below. Set the parameter protection to OFF beforehand. (See Section 4.4.1.)
Operation
(example) Completely fill the piping, close the upstream and downstream valves, and proceed to zero point calibration.
Key operation Description Display
ź
Press the key twice to display “OUTPUT SETTING”.
OUTPUT SETTING
ENT
ź
Press the ENT key twice to display “ZERO ADJUSTMENT” and blink the
cursor.
ZERO ADJUSTMENT
CLEAR
ź
Press the key once, and select “SET ZERO”.
ZERO ADJUSTMENT
SET ZERO
Press the ENT key once to carry out “SET ZERO”.
* Be sure to completely stop the flow beforehand.
ZERO ADJUSTMENT
COMPLETE
Ļ
ENT
ź
ź
ź
ź
ʊʊʊ Zero adjustment has been completed. ʊʊʊ ZERO ADJUSTMENT
SET ZERO
ESC Press the ESC key once, and the key 3 times to enter the
measurement mode.
0.000 m/s
0.000 m3/h
Bulletin F-107-UXF3