Dwyer UXF3 - Manual (Page 61)

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4.10.3. Setting the Bi-directional auto 2 range
Description
z The function measures the flow rate of either forward
or reverse flow while changing over the range
corresponding to the flow direction.
z The current output changes with the action range as
illustrated on the right.
z The hysteresis can be set to between 0 and 20% of
either range of FULL SCALE1 or FULL SCALE2 and
FULL SCALE3 or FULL SCALE4 whichever the span
is smaller.
z Upon setting DO1, DO2 or DO3 to "FULL SCALE2", a
contact outputs "FULL SCALE2" action.
Select “ACTIVE ON” or “ACTIVE OFF” separately.
(See 4.10.5.)
z Settable range: ±0.3 to 32[m/s]; 0.984 to 105 [ft/s] in terms of flow velocity in piping for any of FULL SCALE1 and FULL SCALE2.
When FULL SCALE1 and FULL SCALE2 are set, FULL SCALE3 and FULL SCALE4 are automatically set.
FULL SCALE1 and FULL SCALE3, FULL SCALE2 and FULL SCALE4 are related as follows.
|FULL SCALE1 | = |FULL SCALE3|
|FULL SCALE2| = |FULL SCALE4|
* Preset PIPE PARAMETER and FLOW UNIT.
* If a value beyond the settable range is inputted, "INPUT ERROR" appears and then last setting is resumed.
* If "FLOW UNIT" has been changed after setting the range, redo the range setting.
* When FULL SCALE2 is not used (in the case of single range), set “0” to FULL SCALE2.
The flow rate unit is as selected by "FLOW UNIT" in “MEASURE SETUP” mode. Before setting range, set the "FLOW UNIT".
(See 4.8.2.)
For actual keying, refer to the typical operation indicated below. Set the parameter protection to OFF beforehand. (See Section 4.4.1.)
Operation
(example) Set “BI-DIR AUTO 2” to “RANGE TYPE”, 10[m 3 /h] to “FULL SCALE1”, and 60[m 3 /h] to “FULL SCALE2”.
Set “RANGE HYS.” to 7%.
* Preset “PIPE PARAMETER” and “FLOW UNIT”.
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 4 times to display “RANGE”.
RANGE
ENT
ź
Press the ENT key twice to blink the cursor.
RANGE TYPE
SINGLE
ź
Press the key 3 times, and select “BI-DIR AUTO 2”.
RANGE TYPE
BI-DIR AUTO 2
ENT
ź
Press the ENT key once to display “RANGE TYPE”.
RANGE TYPE
BI-DIR AUTO 2
ź
Press the key once to display “FULL SCALE1”.
FULL SCALE1
20.0000 m3/h
ENT
ź
Press the ENT key once to blink the cursor on the 2nd line.
FULL SCALE1
0 020.0000 m3/h
ź
Press the key several times to align the cursor to “2”.
FULL SCALE1
00 2 0.0000 m3/h
ź
Press the key several times to set “1”.
Note) To change the decimal point position, align the cursor with a place
to change to, and press the key.
FULL SCALE1
00 1 0.0000 m3/h
Press the ENT key once to register.
FULL SCALE1
COMPLETE
Ļ
ENT
ź
ź
ź
ź
ʊʊʊ FULL SCALE1 has been registered. ʊʊʊ FULL SCALE1
10.0000 m3/h
Analog output
20mA
4mA Flow velocity
Hysteresis
Base scale Full scale1 Full scale2 Full scale3 Full scale4
Bulletin F-107-UXF3