IM 1F6A0-01E
2-3
2. GENERAL DESCRIPTION
HART:
Communication Distance:
Up to 1.5km,when using multiple twisted pair
cables. Communication distance varies
depending on type of cable used.
Cable Length for Specific Applications:
Use the following formula to determine cable
length for specific applications.
L= 65
×
10
6
–
(C
f
+10,000)
(R
×
C)
C
where:
L=length in meters.
R=resistance in
Ω
(including barrier
resistance)
C=cable capacitance in pF/m.
Cf= maximum shunt capacitance of reciving
devices in pF/m.
NOTE: HART is a registered trademark of the HART
Communication Foundation.
Functions:
Damping Time Constant :
0 to 99 Sec (63% response time)
Note: Delay time is 0.5 Sec.
Analog output circuit time constant is 0.3 Sec.
Pulse Output Function*:
Pulse output is selected from scaled pulse,
unscaled pulse, frequency (number of pulses
output per second at 100% of output).
Pulse frequency : Max 10 kHz
Duty cycles : Approx.50% (1:2 to 2:1)
Self -diagnostics and Alarm Output *:
In case alarm (over range output signal,
EEPROM error, vibration noise, abnormal
flow such as clogging, bubble) occurs, an
alarm signal is output and indicated.
The alarm signal output goes from close(ON)
to open(OFF) during alarming.
Status Output Function *:
Flow Switch:
In case flow rate decreases under the flow set
value,a status signal is output.
Status signal output mode can reverse (ON/
OFF) .
Analog Output Function:
Analog output is selected from flowrate
temperature value when option code /MV is
selected.
Data Security During Power Failure:
Data (parameter, totalizer value, etc) storage
by EEPROM. No back-up battery required.
Correction:
Instrument Error Correction:
Vortex flowmeter instrument errors can be
corrected by segment approximations.
Reynolds Number Correction:
Output error at Reynolds number 20000 or
less is corrected by using five-break-point
line-segment approximation.
Gas Expansion Correction:
When measuring a compressibility gas and
steam, this expansion factor is useful to
correct the error at high velocity of flow (35m/
s or more).
Down-scale or Up-scale burn out.
In case a CPU or EEPROM failure occurs,
flow meter output the signal of Up-scale (21.6
mA or more).
Up-scale or Down-scale (3.6 mA or less) is
user-selectable through the fail mode alarm
jumper.
Indicator:
Flow rate (% or engineering units) or
temperature value and totalizer can be
indicated simultaneously.
Short message for self diagnostics indicates.
Local parameter setting can be operated by
key switches.
In mounting direction, the right and left 90
°
is
rotatable.
EMC Conformity Standards:
EN61326
AS/NZS 2064
Note: For remote converter type,the signal cable should
be used with the metal conduit.
Pressure Equipment Directive:
Notified Body Identification Number 0038
Module H
T020201.EPS
* PS : Maximum allowable pressure for Flow tube, DN : Nominal size
** Refered to Table 6 coverd by ANNEX II of EC Directive on Pressure
Equipment Directive 97/23/EC
*** DY015 and DY025 are not attached CE mark of PED because they do
not under CE mark of PED
MODEL
DY015
DY025
DY040
DY050
DY080
DY100
DY150
DY200
DY250
DY300
DN(mm)*
15
25
40
50
80
100
150
200
250
300
PS(Mpa)*
42
42
42
42
42
42
42
42
42
42
PS-DN
(Mpa-mm)
630
1050
1680
2100
3360
4200
6300
8400
10500
12600
CATEGORY**
Article 3***,
Paragraph 3
Article 3***,
Paragraph 3
II
II
II
II
III
III
III
III
200
100
50
0
-50
-29
100
50
0
300
Process Temperature (˚C)
With Indicator
Ambient Temperature (˚C)
85
-50
260
85
-29
80
80
F020201.EPS
55
Figure 2.2.1 Ambient Temperature limit (Integal Type)
