Dwyer UXF3 - Manual (Page 75)

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4.10.7. How to compensate the measurement value
Description
z Measurement value can be calibrated arbitrarily.
Zero point and span adjustment can be made.
Settable range
(1) Zero point : -5 to +5 [m/s]; -16.4 to +16.4 [ft/s] in terms
of flow velocity through the piping.
(2) Span : ±200%
The output value (reading, analog output and total output)
is computed by the following expression.
Output =
Measurement value × [Span set value %]
100
+ Zero point
For actual keying, refer to the typical operation indicated below. Set the parameter protection to OFF beforehand. (See Section 4.4.1.)
Operation
(example) Compensate the zero point to 0.5m 3 /h, and the span by +1%.
Key operation Description Display
ź
Press the key twice to display “OUTPUT SETTING”.
OUTPUT SETTING
ENT
ź
Press the ENT key once to display “ZERO ADJUSTMENT”.
ZERO ADJUSTMENT
SET ZERO
ź
Press the key 10 times to display “CALIBRATION ZERO”.
CALIBRATION ZERO
0.000 m3/h
ENT
ź
Press the ENT key once to blink the cursor.
CALIBRATION ZERO
0 0000.000 m3/h
ź
Press the key 6 times to move the cursor.
CALIBRATION ZERO
00000. 0 00 m3/h
ź
Press the key 5 times to set “5”.
CALIBRATION ZERO
00000. 5 00 m3/h
Press the ENT key once to register.
CALIBRATION ZERO
COMPLETE
Ļ
ENT
ź
ź
ź
ź
ʊʊʊ “CALIBRATION ZERO” has been registered. ʊʊʊ CALIBRATION ZERO
0.500 m3/h
ź
Press the key once to display “CALIBRATION SPAN”.
CALIBRATION SPAN
100.0 %
ENT
ź
Press the ENT key once to blink the cursor.
CALIBRATION SPAN
1 00.0 %
ź
Press the key twice to move the cursor.
CALIBRATION SPAN
10 0 .0 %
ź
Press the key once to set “1”.
CALIBRATION SPAN
10 1 .0 %
Press the ENT key once to register.
CALIBRATION SPAN
COMPLETE
Ļ
ENT
ź
ź
ź
ź
ʊʊʊ “CALIBRATION SPAN” has been registered. ʊʊʊ CALIBRATION SPAN
101.0 %
ESC Press the ESC key once and then press the key 3 times to enter
the measurement mode.
0.000 %
0.000 m3/h
Output
0
Zero adjustment movement
Output
0
Span movement
100%
Flow rate Flow rate
Bulletin F-107-UXF3