Integral Volume Correction Differential Pressure (DP) Monitoring
Versions: ptz-dp + LOG, T-dp + LOG, ptz + LOG, P + LOG, and T + LOG
GE Oil & Gas offers an integrated solution,
the Dresser Differential Pressure (DP) Micro Corrector,
which monitors meter health by continuous
measurement of the differential pressure
drop across the meter. The Dresser Micro
Corrector DP is capable of learning the
differential pressure curve for an individual
meter. During the learning period, DP is
monitored using the values present in the
Differential Test Acceptance Calculator (DTAC).
The Dresser Micro Corrector DP retains the last
valid average differential pressure measurement on
the LCD of the corrector along with the date when
this occurred. It also displays the average line pressure,
average line temperature and meter flow rate for that
same date. The differential pressure test information
required to be in compliance with state Public Utility
Commission (PUC) requirements is available with the
push of a button.
This offers operating efficiencies as the number of
return trips to the meter set is reduced, and reduces
the need for venting gas during periods of low
consumption. Differential pressure test results are
also logged in the data logs.
Developed from the proven IMC/W platform, the
Dresser Micro Corrector provides volume correction
through a simple-to-use interface. Features such as
improved low flow accuracy, enhanced data logging
capability, and reduced accuracy test times combine
to offer a complete solution to major customers.
The Dresser Micro Corrector, model IMC/W2,
an integral corrector rated for Division 1 hazardous
locations by the Canadian Standards Association (CSA)
and ATEX.
rrector,
nt on
hen
Dresser Meter with IMC/W2,
Model ptz-dp + LOG
Features
■
Monitors meter health
■
Reduces unnecessary scheduled maintenance
■
Aids in regulatory compliance of DP testing,
where applicable
■
Last valid DP measurement displayed on
LCD and live data screen
■
Real-time differential pressure measurement
■
Compatible with Dresser Series A (LMMA),
Series B, and Romet meters
■
DP measurement is independent of volume correction
■
Remote monitoring capability with Dresser Micro
Modems - GSM/GPRS modems
■
dp + LOG units feature faults for high DP and meter
lock-up
Dresser GSM/GPRS Micro Modem
Page 2
Live data screen displays current DP read, as well as last
valid DP read, pressure, temperature and fl ow rate with
date of occurrence.
Features
■
Rotating index offers ease of meter reading, especially
in non-typical installations
■
Uncorrected instantaneous flow rate displayed on
LCD can help meter differential testing in the field
Maximum uncorrected peak fl ow also
displayed on LCD
■
The SmartProve* Interface reduces meter and
corrector test times by as much as 90%, and allows
the meter and corrector to be tested as a complete
measurement system.
■
User selectable trim table improves rotary meter
accuracy at flow rates less than 10% of meter Qmax
■
Micro Generator* adds years to main battery life,
extending the interval between battery changes
■
User terminal software allows for configuration,
calibration and data log downloads
■
1 to 3 data logs provide for years of historical
information and are configurable in increments from
1 minute to 1 month. Data logs include the option to log
live battery voltage
■
Audit log maintains a record of configuration and
calibration changes
■
Available with your choice of sealed alkaline or
lithium battery pack
Learning methods are customer selectable
in the user terminal software.
■
Alarms notify the user of over-range conditions for
pressure, temperature, and flow rate
■
On units with DP transducer installed, alarms are present
for higher than normal differential pressure
■
Alarm & fault activity is displayed in the data log and
audit log reports, and the live data screen
■
E2PROM provides non-volatile storage of recorded
data and corrector configuration regardless of
battery condition
■
Uncorrected volume under fault register in E2PROM
replicates a backup mechanical index
■
MS Excel® formatted reports allow for manipulation and
sharing of information
Micro Generator
0.0
102
101
100
.99
ACCURACY - %
.98
.97
Trim Table
.51.0
ACCURACY CURVE
1.5
2.02.53.0
RATE-MCFH at INLET CONDITIONS
3.5
4.5
5.0
5.5
5.0
Dresser SmartProve Interface
Page 3
Performance
3 Fully Programmable Pulse Outputs
Resolution
Volume
Pressure
Temperature
Supercompressibility
2
)
(Fpv
Correction Factor
Accuracy over
Operating Temperature
Range
Line Pressure
Line Temperature
Differential Pressure
IMC/W2-PTZ
IMC/W2-P
I MC/W2-T
Long Term Stability
Pressure
Temperature
Meter Trim Table
Meter Accuracy
Correction Range
E2PROM Data Log Memory
Time-stamped Entries
Parameters Logged
3
(0.01 m3)
0.01 ft
0.01 psi (1 mbar)
0.1 ºF (0.1 ºC)
0.0001
0.00001
-40 °F to 140 °F (-40 °C to 60 °C)
0.4% reading
0.9 °F (0.5 °C)
0.1 in. WC
0.5% corrected volume
0.45% corrected volume
0.25% corrected volume
0.1% FS/yr non-cumulative
0.3 ºF (0.2 ºC)/yr non-cumulative
0.3% to 10% Qmax
Up to 32,161 (depending on the
number of Parameters logged)
Corr Vol; Uncorr Vol; Fault Vol; Corr
Factor; Supercomp; Avg and Peak Corr
Flow Rate; 4 Pressures – Min, Max, Avg
and Ending; 4 Temps – Min, Max, Avg
and Ending; Batt Voltage; Differential
pressure test results on units fitted
with DP transducer
Corrected, Uncorrected, and Alarm/Fault
Loop Voltage
Loop Current
Pulse Width
Switch Off Resistance
Switch On Resistance
Isolation
5-15 VDC
10 mA maximum
62.5, 125, 187, or 312 ms
> 2 Mohms
<10 ohms
2,500 VDC
Environment
Operating
-40º F to 140º F (-40º C to 60º C)
Temperature
Storage Temperature
Humidity
-58º F to 176º F (-50º C to 80º C)
Up to 95% sustained outdoor exposure
Enclosure
NEMA 4X (IP66)
Intrinsic Safety
Class 1, Division 1,
CSA Approval No. 1224451
Group D
Zone 0
Class-I, Division-1,
EEX ia IIC T4 Tamb = -40º C to 60º C
BAS98ATEX 1083
Group A, B, C, D
Electromagnetic/Radio Frequency Immunity
FCC Class B
Meets EMI/RFI immunity at 10 V/m,
0.1 to 1,000 MHz
EN50081-1 and EN5088-2
Other
ISO-9001, CE Mark
Battery - Alkaline
Sealed Pack - Alkaline
Low Battery Reserve Alkaline
Battery - Lithium
Sealed Pack
Low Battery Reserve
Inputs
Volume
Pressure
Temperature
5-years nominal life
3-months approximately
15-years nominal life
1.5-years
High speed magnetic pickup in meter
magnet cup
Proprietary semiconductor strain
gauge
ITS-90 Platinum 100Ω RTD = 0.00385
Dresser Micro Corrector also available in
ID and wall mount versions.
Page 4
Ordering Information
The IMC/W2 with or without DP can be ordered
as either:
■
An integral part of a new meter.
■
As a kit to convert existing Dresser Series-A (LMMA),
Series-B (TQM), or Romet meters.
For P and PTZ versions
The IMC/W2 is available in the following pressure
transducer ranges:
Transducer RangeGaugeAbsolute
30 psi (2bar)XX
180 psi (12 bar)XX
350 psi (24 bar)X
1000 psi (70 bar)XX
1500 psi (100 bar)X
■
The 350 psi (24 bar), 1000 psi (70 bar), and 1500 psi
(100 bar) transducers would typically be used for
high pressure meter applications
■
The IMC/W2 can be ordered with either an external
or internal pressure connection
■
IMC/W2’s for Series-A meters, 23M - 56M high
capacity meters, and high pressure meters require
external pressure connections
■
Optional piping kits are available for convenient
connection of external pressure connections
For PTZ and T versions
■
All 23M - 56M high capacity meters, and high pressure
meters require an external temperature probe and
thermowell.
The probes are available with 5 ft or 10 ft
armored cables and in 2” or 8-1/2” in insertion lengths
■
Thermowells are available in sizes 1/4-NPT x 2, 1-NPT x
2, 1-NPT x 4, and 1-NPT x 6; all dimensions are in inches
A variety of pulse output connectors are available
■
Metal 6-pin circular twist lock connectors
■
Plastic cable-gland connectors
■
Conduit fittings and other special connectors are
available upon request
The IMC/W2 will be shipped with a factory standard
configuration unless the customer specifies otherwise.
A sealed battery pack is included and provides a nominal
5 years of reliable corrector operation. Adding the
optional Micro Generator may extend battery life to
7 years or more.
New users will want to order the user terminal software
and one or more communication cables to allow local
configuration, calibration, and data retrieval. The cables
are available in 6, 25, and 50 ft. lengths. Special cables
are available for proving the meter and corrector with
the Dresser Model-5 Transfer Prover. See TS: Dresser
SmartProve for further details.
Pressure Piping Kits for Non-DP versions
Approved for use
to 350 psig G
Length of SS TubingPart NumberPart Number
32”051416-320051416-310
84”051416-420051416-410
120”051416-520051416-510
■
For IMC/W2-dp version, the following piping kits
Approved for use to
1480 psig G
are available:
Length of SS TubingPart Number
36”051416-600
36” with Pipe Plugs051416-610
36” with Test Plugs051416-620
Battery Packs
Sealed Alkaline Pack - P/N 055362-000
Sealed Lithium Pack - P/N 060587-000
Circular Conduit Plug
Communication Cables
PC (Serial) to IMC
Length of CablePart Number
6.6’057135-001
25’057135-002
50’057135-003
PC (USB) to IMC
6.4’060506-000
Cable Gland
GE Oil & Gas
16240 Port Northwest Dr., Suite 100
Houston, Texas 77041-2645
Inside US Ph: 800.521.1114
Inside US Fax: 800.335.5224
Outside US Ph: +1 832.590.2303
Outside US Fax: +1 832.590.2494
Email: rootsmeters.inquiries@ge.com