A new approach to extending measurement ranges
When using computer systems with large
ranges, the ratio of the minimum and maximum flow rates exceeding 1:10, as a rule, the main technical solution is
automatic switching of "measurable threads" depending on the volume of gas passing through each of them. At the same time, special technical
there are no difficulties in organizing the process of switching "threads".
To switch the "threads", special elastic shut-off valves are used to ensure smooth
gas supply to reserve "threads". The main problem in solving this problem was the need to eliminate the revision of versions
internal software of calculators, that is, preventing the use of non-standard versions (i.e., non-compliance
Order No. 618)
for gas buyer facilities.
This task was successfully implemented together with our partner "TES" LTD during the reconstruction of the
gas metering at the Kiev plant named after. Artyom and PJSC "Bakhchisarai
Combine "Stroyindustriya".
In the first case, the issue of the flow range
of 1:800 was resolved, and in the second case - 1:8000.
For this, an additional controller was used, which constantly polls the calculators and, depending on the values
flow controls the opening/closing of the metering thread shut-off valves.
Thus, at the moment of switching cranes, the intervention is recorded in the calculators and the need for
accrual of additional gas volumes for unmeasured lines for cases when the value of the pressure difference is below the "cut-off"
or the flow rate gas is less than Qmin in accordance with Order No. 618.
Same approach applied to the facilities of gas suppliers.
The above options are implemented on the basis of a three-channel calculator "FLOUTEC-TM" with two threads on the
diaphragm and one thread with a gas meter.
( full specifications are in the manual for the device )
1. Measuring complexes FLOUTEC-TM (all modifications) are designed for commercial accounting of gases
(including combustible natural gases) by measuring volumetric (mass) flow and volume (mass) of the flowing medium
one, two or three pipelines:
- FLOUTEC-TM-1 modification complexes (based on the VR-2 calculator) are designed for flow measurements according
to the method variable pressure drop across a standard orifice or averaging pressure tube.
- complexes of modifications FLOUTEC-TM-2 (based on PC-V calculators) are designed to work together with all types of
meters certified in Ukraine (environment flowmeter, rotary, turbine, ultrasonic, Coriolis and vortex gas counters).
2. The complexes include a volumetric (mass) flow calculator VR-2 and digital measuring transducers
PD-1-DA (PD-1-DI) or a set of digital measuring temperature transducers PT-1-D
(PT-1-P), pressure PD-1-A (-I ), differential pressure PD-1-D, intrinsically
safe barrier, power supply (and/or additionally connected densitometer).
3. The complexes provide:
• collaboration with an automatic gas flow chromatograph for use in calculations of volumetric
costs of data on the current gas composition;
• exchange of information with a PC of the "upper level" via a telephone switched channel or via a radio channel with
use of existing GSM systems, satellite and trunking radio communications;
• printing of daily and monthly reports (at the user's request).
• and others (see operation manual for FLOUTEC-TM Complexes).
4. FLOUTEC-TM complexes comply with the Technical Regulations approved by the Decree of the Cabinet of Ministers of December 28,
2016 No. 1055 and have explosion protection marking
II 2G Ex ib IIB T3 Gb and can be installed in explosive areas of open industrial sites and premises, where the formation of
explosive mixtures of categories IIA and IIB is possible.
5. The calibration interval of the FLOUTEC-TM Complexes is once every two years, (see clause 41, and note 7) according to
Order No. 1747 dated October 13, 2016,
Ministry of Economic Development and Trade of Ukraine.
6. Operation of FLOUTEC-TM measuring complexes is allowed at ambient temperature from minus 40 to plus 70 °C.
1. Relative error limits for complexes of modifications FLOUTEC-TM-1 and FLOUTEC-TM-2 when measuring volumetric
(mass) flow rate and volume (mass) of the medium (without taking into account the methodological error of a standard constriction
device or an averaging pressure tube and depending on the error of measuring transducers of temperature, pressure, differential
pressure and density, and pressure ranges and differential pressure of the medium on these devices) range from ±0.3 to ±1.9%.
Relative error limits of complexes of modifications FLOUTEC-TM-3, FLOUTEC-TM-4 at measurements of volumetric (mass)
flow and volume (mass) of the medium (without taking into account the error of the meter or flow meter) range from ±0.3 to ±0.5%
(depending on the error of the measuring transducers) temperature, pressure, density and pressure range of the medium).
2. Limits of permissible basic summary error when measuring absolute, gauge and differential pressure
are: ±0.075; ±0.10; ±0.15 or ±0.25% of span.
3. The limits of the absolute permissible error of complexes when measuring temperature are ±0.5°C or ±0.75°C
4. The complexes provide installation (on request) of the upper limits of measurements in the range:
• for absolute pressure – from 100 kPa to 10 MPa
• for overpressure – from 6 kPa to 25 MPa
• for differential pressure – from 1.0 to 256 kPa
5. Temperature measurement range – from minus 40 to plus 100 °С
6. The maximum period of time for which records for each pipeline are stored in the memory of the calculator VR-2 and PC-V:
• daily data - last six months
• hourly data - last two months
• operational data - 3600 records
• messages about emergency and emergency situations - 1000 entries
• intervention - 1000 entries
VR-2 calculator (VR-2 calculator board)
equipped with a memory Micro SD-card designed to store instantaneous (cycle) data for the last 60 days.
The memory card stores three files that are constantly updated, in which the instantaneous valuesof pressure, differential
pressure (or increase in volume under operating conditions), temperature, flow rate, CO2, N2, gas density,
condition calculation on a cycle of 1 second.
If necessary, the memory SD-card can be removed from the VR-2 Calculator for reading information on a PC.
You must use ConCor for this procedure.
7. The electrical power supply of the complexes is carried out from the alternating current network with a voltage of 160 to 250 V and a frequency of (50±1) Hz.
The complexes have a backup DC power supply (battery) with a nominal voltage of 12 V, which ensures the safety
measuring information and normal operation of the complexes for at least 100 hours.
8. The power consumed by the complexes does not exceed:
• when powered by AC mains voltage 220 V and a frequency of 50 Hz - 14 VA;
• when autonomously powered by a battery with a nominal voltage of 12 V - 1.7 W.
9. The service life of FLOUTEC-TM complexes is at least 12 years.
(the most common supply options for the Complexes)
I - based on dual pressure transducers PD-1-DA; (PD-1-DI)
Variable Differential Pressure Flow Measurement in *
(provides measurement in three pipelines)
|
|
pipe (pcs.) |
pipes (pcs.) |
pipes (pcs.) |
| 1. Flow calculator VR-2 |
|
|
|
| 2. Absolute (or excess) pressure converter PD-1A (PD-1I) |
|
|
|
| 3. Differential pressure transducer PD-1-DA (PD-1-DI) |
|
|
|
| 4. Temperature converter PT-1 |
|
|
|
| 5. Intrinsically safe barrier BI-4 (or BI-2, BI-3) |
|
|
|
|
6. Power supply JI 12/3 (with battery) - battery for battery NP12-18Ah - specifications |
|
|
|
P.S. * - marking of FLOUTEC-TM complexes when ordering:
(one pipe = one channel)
single-channel complex: - FLOUTEC-TM-1-1-2,
two-channel: - FLOUTEC-TM-1-11-22,
three-channel: - FLOUTEC-TM-1-111-222
II - based on a set of measuring transducers (pressure, differential pressure, temperature) variable differential pressure flow measurement **
(provides measurement in two pipelines only)
|
|
pipe (pcs.) |
pipes (pcs.) |
pipes (pcs.) |
| 1. Flow calculator VR-2 |
|
|
|
| 2. Absolute (or excess) pressure converter PD-1-A (PD-1-I) |
|
|
|
| 3. Differential pressure transducer PD-1-DA (or PD-1-DI) |
|
|
|
| 4. Temperature converter PT-1 |
|
|
|
| 5. Intrinsically safe barrier BI-4 (or BI-2, BI-3) |
|
|
|
|
6. Power supply JI 12/3 (with battery) - battery for battery NP12-18Ah - specifications |
|
|
|
P.S. ** - marking of FLOUTEK-TM complexes when ordering:
(one pipe = one channel)
single-channel complex: - FLOUTEC-TM-1-1-1,
two-channel: - FLOUTEC-TM-1-11-11
III - based on Calculator PC-V version 1 by variable pressure drop method for flow measurement.
Marking of the FLOUTEC-TM-2-1-2 complex y
(provides measurement in only one pipeline)
|
|
pipe (pcs.) |
pipes (pcs.) |
pipes (pcs.) |
| 1. Calculator PC-V version 1 |
|
|
|
| 2. Temperature converter PT-1 |
|
|
|
| 3. Intrinsically safe barrier BI-7 |
|
|
|
|
4. Power supply JI 12/3 (with battery) - battery for battery NP12-18Ah - specifications |
|
|
|
IV - on the basis of the calculation PC-V Vikonannya 2 Rent for marking complex FLOUTEC-TM-2-3-4 y warehouse
(Provides vimir only through one pipeline)
|
|
pipe (pcs.) |
pipes (pcs.) |
pipes (pcs.) |
| 1. Calculator PC-V version 2 |
|
|
|
| 2. Temperature converter PT-1 |
|
|
|
| 3. Intrinsically safe barrier BI-7 |
|
|
|
|
4. Power supply JI 12/3 (with battery) - battery for battery NP12-18Ah - specifications |
|
|
|
Volume and mass calculator BR-2 expenses.
Calculator PC-V.
Measuring complexes FLOUTEK-TM. Operation manual
Measuring complexes FLOUTEK-TM. Manual
To update the software of FLOUTEC-TM measuring Complexes go to the following link:
1). HostWin - Maintenance program for FLOUTEC-TM Complexes of all modifications (survey, accumulation
and viewing information, issuing commercial reports on the consumption of the measured medium)
If the measuring complex FLOUTEC-TM contains the "Initiative Interface Converter", it is necessary to additionally
apply the program InitCntrPack.rar.
Run the "Conf.exe" application from the specified package and configure the proactive interface converter in it.
manual.pdf - Instructions for working with HostWin with an initiative interface converter
as part of the FLOUTEC-TM measuring complex
2). CONCOR - The program for the configuration of calculators (correctors) of all modifications of
measuring complexes FLOUTEC-TM
USB Port Driver for communication with the computer VR-2.
Type Examination Certificate. (Calculator VR-2)
Type Examination Certificate. (PC-V converters)
Type-examination Certificate (FLOUTEC-TM measuring systems)
Notice of type conformity based on quality assurance of the production process
Quality Management System Approval Certificate (module D)
Certificates, Permits. . . (full list)