Yokogawa digitalYEWFLO (DY) - Manual (Page 54)

<6. PARAMETERS>
6-18
IM 01F06A00-01EN
• Defi nition of error varies with the type of
fl owmeter. Be careful of the difference in signs
in the error and corrected value.
Q
f
=
f(Hz)
100
K-factor
holds and the error is included in the K-factor.
Therefore, for the region where the K-factor
shift on the positive side, the corrected value is
negative.
The corrected value when the calibration fl uid
of the fl owmeter and the fl uid to be measured
are different must be set as a corrected value
obtained by making both abscissas agree with
respect to the Reynolds number.
(8) Item J (TEST)
These items are for test of output.
A value in “( )” is the data corresponding to indicator.
The test output by setting in J10, J20 or J30 is
automatically released when shifts from these
parameter items or as following time goes without
access to these parameter items.
“K50: SOFTWARE REV” = “6.20” or less: 10
minutes
“K50: SOFTWARE REV” = “7.00” or greater: a
value set in J40: RELEASE TIME
[J10:OUT ANALOG] 4 to 20mA Current
output
It tests 4 to 20mA Current output. Electric current of
the set value (%) which designates 4 to 20mA as 0
to 100%.
When this test is executed, transistor contact output
(Pulse, Alarm, Status) is fi xed at ON or OFF (not
determined).
[J20:OUT PULSE] Pulse output
It tests Pulse output.
The number of pulses which is set (unit: PPS) is
output.
Exiting this parameter item or stopping access after
ten minutes which is set in J40, this function will be
reset automatically.
When this test is executed, current output is fi xed at
0% (4mA).
[J30:OUT STATUS] Status output test
Status output test can be executed (OFF(0) or
ON(1)).
When this test is executed, current output is fi xed at
0% (4mA).
Exiting this parameter item or stopping access after
ten minutes, this function will be reset automatically.
[J40:RELEASE TIME] Release time
Automatic reset time of J10, J20 and J30 can be
change.
Select from 10min (0), 30min (1), 60min (2), 3h (3),
6h (4), or 12h (5).
(9) Item K (Maintenance)
These items are for maintenance.
A value in “( )” is the data corresponding to indicator.
[K10:TLA] TLA Adjustment
Trigger level (TLA) is adjusted upon shipment.
Therefore, TLA adjustment is nonnecessity. But set
TLA adjustment below as
• The measurement of Low fl ow rate area is
required.
• Mechanical vibration and impact are applied
to digitalYEWFLO and Zero point and low fl ow
rate area is output.
Note: Refer to Section 10.2 “Adjustment for
Manual Mode”.
[K20:SIGNAL LEVEL] Signal Level
Set the signal level.
[K25:N. B. MODE] Noise Balance Mode
Set the Noise Balance Mode from “AUTO(0)”,
“MANUAL(1)”, or “TUNING AT ZERO(2)”
[K26:N. B.RATIO] The ratio of Noise
Balance
When “NOISE BALANCE MODE (N. B. MODE)” is
“AUTO”, noise balance value is the indication only.
When N.B. mode is “MANUAL”, the noise balance
can be adjusted entering the setting values.
Note: Refer to Section 10.2 “Adjustment for Manual
Mode”.
[K28:SET VORTEX F] Output test by setting
simulated frequency
Amplifi er check is executed by simulated frequency
input.
Output to be able to check are, analog output, pulse
output/contact output.
Test status also can be seen on display board.