RMG EMC 500 User manual
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Device EMC 500 /500-L
OPERATING INSTRUCTIONS
STATUS FEBRUARY 2008
珠海司福斯特科技有限公司
...............................................................................................................................................................................................................
...............................................................................................................................................................................................................
Manual EMC 500 · EN01 · 2008-02
Note:
Unfortunately, paperwork does not automatically update itself but technical developments are
constantly being made. Therefore, we reserve the right to change the descriptions and statements
contained in our operating instructions without prior notice. However, you can conveniently
download the most recent version of this manual (and those of other devices) from our website
www.rmg.com.
RMG Messtechnik GmbH
Otto-Hahn-Str. 5 Phone numbers:
35510 Butzbach (Germany) Switchboard: +49 (0)6033 897-0
Fax: +49 (0)6033 897-130 Customer Service: +49 (0)6033 897-127
珠海司福斯特科技有限公司
CONTENTS
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Manual EMC 500 · EN01 · 2008-02
INTRODUCTION....................................................................................................... 1
Operating principle ......................................................................................................................2
Block diagram ........................................................................................................................................ 2
Construction of the explosion-protected (Ex) design .............................................................................. 3
Construction of the not explosion-protected (Non Ex) design................................................................. 4
Measuring and electronic unit ................................................................................................................ 5
Sensor block .......................................................................................................................................... 6
Complete configuration .......................................................................................................................... 7
Configuration with analytical computer GC 9000 ................................................................................... 7
OPERATING INSTRUCTIONS FOR THE EXPLOSION-PROTECTED DESIGN ............ 8
General Instructions ....................................................................................................................8
Explosion-proof enclosure ...........................................................................................................8
Increased-safety terminal compartment.....................................................................................8
Maintenance.................................................................................................................................9
Safety Measures ..........................................................................................................................9
Maintenance Work .......................................................................................................................9
Repairs .........................................................................................................................................9
START-UP ..............................................................................................................10
Location of the EMC 500 ...........................................................................................................10
Mechanical connection..............................................................................................................10
Electrical connections ...............................................................................................................11
Connection box of the measuring element ........................................................................................... 11
Terminal assignments for the EMC 500 design with analog transmission ............................................ 11
Terminal diagram of the measuring element for digital transmission.................................................... 12
Warming-up phase .....................................................................................................................13
Initial calibration ........................................................................................................................13
OPERATION ...........................................................................................................14
Automatic recalibration .............................................................................................................14
Manual calibration .....................................................................................................................14
Sequence of calibration .............................................................................................................15
Test gas analysis........................................................................................................................15
Maintenance...............................................................................................................................15
ANALYTICAL COMPUTER GC 9000 ......................................................................16
GC 9000 Front panel..................................................................................................................18
珠海司福斯特科技有限公司
CONTENTS
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Manual EMC 500 · EN01 · 2008-02
Operating the GC 9000..............................................................................................................19
Description of the function keys........................................................................................................... 19
Special Function keys........................................................................................................................... 20
Display fault / Clear Fault Function...................................................................................................... 21
Display fault ............................................................................................................................................................................ 21
Clear fault ............................................................................................................................................................................... 21
Operating Examples ............................................................................................................................. 21
Displaying measured values, constants and modes................................................................................................................ 21
Enabling programming ............................................................................................................................................................ 22
Programming a new constant ................................................................................................................................................. 23
General information about inputting new values: ................................................................................................................... 23
Programming a new mode ...................................................................................................................................................... 24
Programming current outputs................................................................................................................................................. 24
Coordinate system GC 9000 .....................................................................................................25
Survey over the matrix ......................................................................................................................... 25
Description of the matrix structure....................................................................................................... 26
Description of Individual Columns ............................................................................................27
EMC Calibration ................................................................................................................................... 27
EMC Constants..................................................................................................................................... 28
EMC Mode............................................................................................................................................ 29
EMC Archives ....................................................................................................................................... 30
Current Output 1 .................................................................................................................................. 31
Current Output 2 .................................................................................................................................. 32
Current Output 3 .................................................................................................................................. 33
Current Output 4 .................................................................................................................................. 34
Serial Interfaces ................................................................................................................................... 35
Selection of Calculations...................................................................................................................... 36
Measured Values.................................................................................................................................. 37
Printer Control...................................................................................................................................... 39
Date ..................................................................................................................................................... 40
Time ..................................................................................................................................................... 40
Fault ..................................................................................................................................................... 41
EMC Sensor 1 ...................................................................................................................................... 42
EMC Sensor 2 ...................................................................................................................................... 43
EMC Pressure....................................................................................................................................... 44
EMC Case Temperature........................................................................................................................ 45
EMC Block Temperature....................................................................................................................... 46
Version Parameters .............................................................................................................................. 47
ANNEX ...................................................................................................................48
A Block Diagram for the GC 9000 ..........................................................................................48
B Technical Data......................................................................................................................49
C Pin Assignment Diagram for the GC 9000 ..........................................................................51
D Fault List...............................................................................................................................52
E Configuration of the Interfaces ...........................................................................................55
FAssembly Instructions for Pipe Connections......................................................................56
珠海司福斯特科技有限公司
INTRODUCTION
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Manual EMC 500 · EN01 · 2008-02
1
Introduction
In addition to the superior calorific value, the EMC 500 / 500-L measuring device continuously
determines the inferior calorific value, Wobbe index and standard density of fuel gases.
The Wobbe index is a measured quantity for monitoring and controlling the heat output of gas
burners and is defined as follows:
rd
H
Wair,n
n
rd
Where:
W is the Wobbe index (Wi, Ws)
H is the calorific value (Hi, Hs)
rd is the relative density
nis the standard density of the measuring gas
n,air is the standard density of the air
The heat output of a gas burner can be maintained at a constant level if the gas supply is controlled
in such a way that the Wobbe index remains constant.
The inferior and superior calorific values and the standard density are thermic characteristics which
are used for monitoring the composition and energy content of fuel gases.
The EMC 500 measuring device is suitable for custody transfer flow measurements of the superior
calorific value, the standard density and the CO2content of natural gases and their mixtures.
The version EMC 500-L is also suitable for natural gases which have been conditioned with up to
20% of air. This version may be used for custody transfer flow measurements of the superior
calorific value and the CO2content. After a special test the standard density may be used for the
calculation of the compressibility.
In contrast to conventional methods, the EMC 500 / 500-L measuring device determines the
measured values without burning the measuring gas. Combustion-free measurement has significant
advantages, such as:
- Low maintenance requirements no cleaning of the burner
no maintenance of the air supply system
- No air for combustion has to be supplied, and therefore, the ambient air has no effect on the
measured value.
- No undesired heat is produced at the place of installation.
The EMC 500 / 500-L detects changes in measured values within a very short time. So also
automatic recalibration is terminated within a few minutes.
Moreover, the min./max. limits of the measured values and the temperature of the sensor are
monitored.
珠海司福斯特科技有限公司
INTRODUCTION
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Manual EMC 500 · EN01 · 2008-02
2
Operating principle
At the heart of the EMC 500 measuring device lie two thermal sensors depending on the type of
gas used which are used to measure the heat capacity and thermal conductivity of the gas. Since
these two quantities represent over a wide range a function of the superior calorific value, it is
possible to calculate the superior and inferior calorific values from these measured values.
Furthermore, the pressure drop is measured by means of a flow resistor. Due to the fact that the
pressure drop at a constant gas temperature is a function of the gas density, it can be used to
determine the standard density of the gas. The Wobbe index is then calculated from the superior
calorific value and the standard density.
With a infrared sensor the CO2content is measured which is needed, besides superior calorific
value and standard density, to calculate the compressibility according to GERG 88-S.
Block diagram
1. Stop valve
2. Solenoid valve
(block and bleed configuration)
3. Flow meter with control valv
e
4. Filter
5. Pressure regulator
6. Sensors
7. Flow resistor
8. Pressure transmitter
9. Pressure gauge
10. CO sensor
2
Calibration gas
Test gas Ventilblock
Gas inlet pressure 0.5-3.0 bar
Gas inlet pressure 0.5-3.0 bar
Gas inlet pressure 0.5-3.0 bar
Sensorblock
P
Measuring gas
Exhaust gas
max. 15 N /h
l
Bypass
max. 120 N /h
l
8
8
10
7
7
6
5
5
9
9
9
1
3
2
2
2
22
4
4
4
1
1
P
珠海司福斯特科技有限公司
INTRODUCTION
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Manual EMC 500 · EN01 · 2008-02
3
Construction of the explosion-protected (Ex) design
A:
B: Calibration
C: Test
E1, E2:
Connections:
Measuring gas inlet
gas inlet
gas inlet
Outlet pipes with 6 mm pipe connections
with Swagelok joints
E1 E2
ABC
2
4
55
4
7
3
6
1
504
480
650
588
40
340
Inlet pressure 0.5 to 3.0 bar
1/8” pipe connection with Swagelok joint
Hole pattern for
wall mounting
hole Ø 10 mm
1.) Measuring element with valve control -
explosion-proof enclosure.
2.) EEx e connection box
3.) Variable-area flow meter
for bypass - measuring gas
4.) Inlet pressure gauge for measuring
gas, reference gas and test gas
5.) Stop valve for measuring gas,
reference gas and test gas
6.) Mounting plate with fixtures
for wall mounting
7.) Inlet filter
珠海司福斯特科技有限公司
INTRODUCTION
.........................................................................................................................................................................................................
...............................................................................................................................................................................................................
Manual EMC 500 · EN01 · 2008-02
4
Construction of the not explosion-protected (Non Ex) design
E1 E2
ABC
2
4
55
4
7
3
6
1
504
480
650
588
40
260
A:
B: Calibration
C: Test
E1, E2:
Connections:
Measuring gas inlet
gas inlet
gas inlet
Outlet pipes with 6 mm pipe connections
with Swagelok joints
Inlet pressure 0.5 to 3.0 bar
1/8” pipe connection with Swagelok joint
Hole pattern for
wall mounting
hole Ø 10 mm
1.) Measuring element with valve control
2.) Connection box
3.) Variable-area flow meter
for bypass - measuring gas
4.) Inlet pressure gauge for measuring
gas, reference gas and test gas
5.) Stop valve for measuring gas,
reference gas and test gas
6.) Mounting plate with fixtures
for wall mounting
7.) Inlet filter
珠海司福斯特科技有限公司
INTRODUCTION
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Manual EMC 500 · EN01 · 2008-02
5
Measuring and electronic unit
9
1
8
7
6
5
4
pressure gauge
1. Sensor, heated and insulated 6. Line filter type SS-2F-2
2. Pressure reducer (stage 1) 7. Mounting plate
3. Pressure transducer
4. Infrared sensor (CO ) (only active in 230 V version)
5. Solenoid valve block 9. Electronic board
with 3/2-way solenoid valve
8. Power supply unit
2
2
3
Measuring gas outle
t
Calibration
gas inlet Measuring
gas inlet
珠海司福斯特科技有限公司
INTRODUCTION
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Manual EMC 500 · EN01 · 2008-02
6
Sensor block
Pressure reducer (stage 2)
Gas inlet
Connection of
pressure compensation
Heating mat
Cover for gas
preheating plate,
all-round welded to
be gas-tight.
Gas outlet
Capillary tube spiral
(flow resistor)
p pressure sensor
Flow sensor
Heating mat
Gas preheating plate
珠海司福斯特科技有限公司
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