YOKOGAWA CM6G User manual

User’s
Manual Model CM6G
Gas Calorimeter
IM 11R02A01-02E
IM 11R02A01-02E
6th Edition

i
IM 11R02A01-02E 6th Edition :May 10, 2019-00
<INTRODUCTION>
uIntroduction
Thank you for purchasing Model CM6G Gas Calorimeter.
In order to have the product deliver its full capabilities, read this instruction manual thoroughly
before you use it.
On how to use the Gas density meter, read the instruction manual which comes with the product.
WARNING
Since the ignition starts until it completes, or right after the ame is extinguished, sample gas
mixed with the air will be released from the top of the equipment into the installation space. Even
though the sample gas will be diluted su󰀩ciently by the air, great attention should be paid to the
following points if the sample gas contains harmful gases such as CO.
• Conrm that the air is supplied before introducing the sample gas.
• Use the equipment in a well-ventilated environment equipped with a ventilation system.
• Do not expose your face above the top of the calorie detector.
nAbout This Manual
• This manual should be passed on to the end user so that the user can refer to the manual
whenever they need.
• If the product is not used in a manner specied in this manual, the safety of this product may
be impaired.
• The contents of this manual are subject to change without prior notice.
• The contents of this manual shall not be reproduced or copied, in part or in whole,without
permission.
• This manual explains the functions contained in this product, but does not warrant that they
are suitable for the particular purpose of the user.
• Every e󰀨ort has been made to ensure accuracy in the preparation of this manual.
However, when you realize mistaken expressions or omissions, please contact the nearest
Yokogawa Electric representative or sales o󰀩ce.
nDrawing Conventions
Some drawings may be partially emphasized, simplied, or omitted, for the convenience of
description.
nInspection on delivery
After the delivery, open the product package carefully and inspect for damages caused during the
transport. Should there be any damage or breakage on the product, please contact YOKOGAWA
immediately. Retain all the packing materials, containers and boxes that came with the product.
After unpacking, make sure the delivered products include all of the component equipment you
ordered. When conrming the specications, refer to the model and su󰀩x codes indicated on the
nameplate on the product. The models are indicated on the name plates. Check also those of
accessories. For further information, please read subsection 1.2 of this document.
Media No.IM 11R02A01-02E 6thEdition : May 10, 2019 (YK)
All Rights Reserved Copyright © 2016, Yokogawa Electric Corporation

ii
IM 11R02A01-02E 6th Edition :May 10, 2019-00
<INTRODUCTION>
uSafety Precautions
n Safety,Protection,ModicationoftheProduct
• In order to protect the system controlled by the product and the product itself and ensure
safe operation, observe the safety precautions described in this user’s manual. We assume
no liability for safety if users fail to observe these instructions when operating the product.
• If this instrument is used in a manner not specied in this user’s manual, the protection
provided by this instrument may be impaired.
• If any protection or safety circuit is required for the system controlled by the product or for
the product itself, prepare it separately.
• Be sure to use the spare parts approved by Yokogawa Electric Corporation (hereafter
simply referred to as YOKOGAWA) when replacing parts or consumables.
• Modication of the product is strictly prohibited.
• The following safety symbols are used on the product as well as in this manual.
WARNING
This symbol indicates that an operator must follow the instructions laid out in this manual in
order to avoid the risks for the human body and health including risk of injury, electric shock, or
fatalities. or the damages to instruments. The manual describes what special care the operator
must take to avoid such risks.
CAUTION
This symbol indicates that the operator must refer to the instructions in this manual in order to
prevent the operator or instrument from being injured, or damaged.
The following are signal words to be found only in our instruction manuals.
CAUTION
This symbol gives essential information to avoid damages of soft or hardware, or system failure.
NOTE
This symbol indicates information that complements the present topic.
nWarning and Disclaimer
• The product is provided on an “as is” basis. YOKOGAWA shall have neither liability nor
responsibility to any person or entity with respect to any direct or indirect loss or damage
arising from using the product or any defect of the product that YOKOGAWA can not predict
in advance.
nTrademark policy
All company or product and product names mentioned in this document are trade names,
trademarks or registered trademarks of their representative companies. In this document,
trademarks or trade names are not indicated with TM or ® as trademark symbols.

iii
IM 11R02A01-02E 6th Edition :May 10, 2019-00
<INTRODUCTION>
uAfter-sales Warranty
nDo not modify the product.
n Yokogawa warrants the product for the period stated in the pre-purchase quotation Yokogawa
shall conduct dened warranty service based on its standard. When the customer site is located
outside of the service area, a fee for dispatching the maintenance engineer will be charged to the
customer.
nDuring the warranty period, for repair under warranty, carry or send the product to the local
sales representative or service o󰀩ce. Yokogawa will replace or repair any damaged parts and
return the product to you.
• Before returning a product for repair under warranty, provide us with the model name
and serial number and a description of the problem. Any diagrams or data explaining the
problem would also be appreciated.
• If we replace the product with a new one, we won’t provide you with a repair report.
nIn the following cases, customer will be charged repair fee regardless of warranty period.
• Failure of components which are out of scope of warranty stated in instruction manual.
• Failure caused by usage of software, hardware or auxiliary equipment, which Yokogawa
Electric did not supply.
• Failure due to improper or insu󰀩cient maintenance by user.
• Failure due to modication, misuse or outside-of-specications operation which Yokogawa
does not authorize.
• Failure or damage caused by relocation of the instrument.
• Failure due to power supply (voltage, frequency) being outside specications or abnormal.
• Failure caused by any usage at location or its maintenance that Yokogawa does not
authorize.
• Any damage from re, earthquake, storms and oods, lightning, disturbances, riots, warfare,
radiation and other natural changes.
n Yokogawa does not warrant conformance with the specic application at the user site.
Yokogawa will not bear direct / indirect responsibility for damage due to a specic application.
nYokogawa Electric will not bear direct / indirect responsibility for any damage an end user might
incur, when the user congures the product into systems or resells the product.
n Maintenance service and supplying repair parts will be covered for ve years after the
production ends. For repair for the product, please contact the nearest sales o󰀩ce described in
this instruction manual.

Blank Page

Toc-1
IM 11R02A01-02E 6th Edition :May 10, 2019-00
Model CM6G
Gas Calorimeter
CONTENTS
u Introduction....................................................................................................i
u Safety Precautions .......................................................................................ii
1. Outline ....................................................................................................... 1-1
1.1 StandardSpecications................................................................................... 1-1
1.2 ModelandSu󰀩xCodes ................................................................................... 1-3
1.3 .............................................................. Standard Systems for Each Application
1-4
1.4 ExternalDimensions ........................................................................................ 1-6
1.5 ....................................................................................Principle of Measurements
1-10
2. Installation, Piping, Wiring ...................................................................... 2-1
2.1 Installations ....................................................................................................... 2-1
2.2 Externalpiping .................................................................................................. 2-1
2.3 ExternalWirings................................................................................................ 2-4
3. Construction and Function ..................................................................... 3-1
3.1 Air Pressure Regulating System..................................................................... 3-1
3.2 Gas Pressure Control Section......................................................................... 3-1
3.3 Di󰀨erentialPressureDetectionPart ............................................................... 3-4
3.4 Calorie Detector ................................................................................................ 3-5
3.4.1 Burner Unit ......................................................................................... 3-8
3.4.2 High/Low Alarm Action....................................................................... 3-9
3.4.3 Ignition ............................................................................................... 3-9
3.5 Computing Station.......................................................................................... 3-10
3.5.1 Display ............................................................................................. 3-10
3.5.2 Contents of the Data Display ........................................................... 3-13
3.5.3 Correcting Computation................................................................... 3-14
3.6 Density Meter................................................................................................... 3-16
4. Preparation of Operation......................................................................... 4-1
4.1 Sampling Section (Outside panel) .................................................................. 4-1
4.2 Status of Valves................................................................................................. 4-1
4.3 Water Supply (For Steel Mill Use).................................................................... 4-1
4.4 Supply of the Air................................................................................................ 4-2
4.5 Supply of Power................................................................................................ 4-2
4.6 TheZeroAdjustmentoftheDi󰀨erentialPressureTransmitter.................... 4-2
4.7 AirDi󰀨erentialPressureAdjustment.............................................................. 4-3
IM 11R02A01-02E 6th Edition

Toc-2
IM 11R02A01-02E 6th Edition :May 10, 2019-00
4.8 Pressure Adjustment of the Gas Line............................................................. 4-3
5. Operation................................................................................................... 5-1
5.1 Start Operation.................................................................................................. 5-1
5.2 Stopping Operations ........................................................................................ 5-2
6. Calibration................................................................................................. 6-1
6.1 Supply of the Calibration Gas.......................................................................... 6-1
6.1.1 For Town Gas Use ............................................................................. 6-1
6.1.2 For Steel Mill Use............................................................................... 6-2
6.2 Span Adjustment of the Calorie Detector....................................................... 6-2
6.3 Calibration of the Computing Station............................................................. 6-4
6.4 Calibration of the Density Meter...................................................................... 6-4
7. Maintenance.............................................................................................. 7-1
7.1 Daily Check........................................................................................................ 7-1
7.1.1 Air, Gas Di󰀨erential Pressure Adjustment ......................................... 7-1
7.1.2 Take Out the Water Out of the Drain Pot (Pump for Steel Mill Use) .. 7-1
7.1.3 Take Out the Drain from the Air Set ................................................... 7-1
7.2 Regular Check................................................................................................... 7-2
7.2.1 Cleaning of the Orice Plate and Replacement of O-ring ................. 7-2
7.2.2 Fulo Filter (For Steel Mill Use).......................................................... 7-3
7.2.3 Line Filter (For Town Gas Use) .......................................................... 7-3
7.2.4 Washing Bubbler or Pressure Regulating Pot................................... 7-4
7.2.5 Dehumidier (For Steel Mill Use)....................................................... 7-4
7.2.6 Density Meter ..................................................................................... 7-4
7.3 Check at the Regular Service .......................................................................... 7-5
7.3.1 Check the Burner Flame.................................................................... 7-5
7.3.2 Zero Adjustment of the Di󰀨erential Pressure Transmitter.................. 7-6
7.3.3 Others ................................................................................................ 7-6
8. Troubleshooting ....................................................................................... 8-1
8.1 Gas Sampling Pressure Regulating Section ................................................. 8-1
8.2 Air Pressure Adjustment Section.................................................................... 8-2
8.3 Di󰀨erentialPressureTransmitterSection...................................................... 8-2
8.4 Signal Section ................................................................................................... 8-3
8.5 Computing Station............................................................................................ 8-5
8.6 Other Troubleshooting ..................................................................................... 8-5
Revision Information ...............................................................................................i

<1. Outline> 1-1
IM 11R02A01-02E 6th Edition :May 10, 2019-00
1. Outline
Model CM6G Gas calorimeter measures and controls a caloric value of gases, Wobbe-Index
(hereinafter referred to as WI), a theoretical air requirement, and a heat input for various kind of
gas burning furnaces.
It detects a temperature rise of a sample gas, whose pressure is normally controlled, by burning it
at a burner through the medium of air.
It picks up the ow rate of the sample gas and the air as the di󰀨erential pressure signal and
outputs a signal of WI after compensating calculation of the indication di󰀨erence caused by the
ow rate variation.
It also detects density of the sample gas by a density meter, and add to WI signal density
compensation, then, outputs a caloric signal.
1.1 StandardSpecications
EMC : EMC Regulatory Arrangement in Australia and New Zealand
Korea Electromagnetic Conformity Standard Class A 한국 전자파적합성 기준
A급 기기 (업무용 방송통신기자재)
이 기기는 업무용(A급) 전자파적합기기로서 판매자 또는
사용자는 이 점을 주의하시기 바라며, 가정외의 지역에서
사용하는 것을 목적으로 합니다.
nTown Gas Application
Measurement Object : Measurement and control of WI or the caloric value of fuel gas
for town gas.
Measuring Range : 3 to 62 MJ/Nm3
Sample Conditions :
Dust ; 5 mg/Nm3 or less
Temperature ; 50°C or less
Humidity ; dew point of 0°C or less
Pressure ; (1) 10 to 20 kPa
(2) 10 kPa or under: with pump
(3) 100 to 600 kPa: with pressure reducing valve
Range : Select scale range (Span) :
General Gas ; 30 to 50% of maximum value of the span
Butane or Butene + Air ; 20 to 30% of maximum value of the span
Propane or Propylene + Air ;25 to 40% of maximum value of the span
Output : 1 to 5 V DC, 4 to 20 mA DC (simultaneously), non-isolated,
load resistance; 750 Ω or less
Alarm Contact Output :
Flame o󰀨 alarm; 100 V AC, 5 A, closed when alarm occurs (resistance
load) when contact is opened, the leakage current is 2
mA or less (100 V AC)
Orice Temperature alarm; 100 V AC, 3 A, closed when alarm occurs
(resistance load)
Contact Input : Remote ignition (Custom order); 24 V DC, 0.1A or more

<1. Outline> 1-2
IM 11R02A01-02E 6th Edition :May 10, 2019-00
Repeatability
Measurement Measuring range (Note 1) Repeatability
WI High caloric value
Low caloric value
± 0.5% of measured value
± 1.0% of measured value
Caloric value
MJ/Nm3
High caloric value
Low caloric value
± 1.0% of measured value
± 1.5% of measured value
Note 1: High caloric value means 6.3 MJ/Nm3or more. Low caloric value means below 6.3 MJ/Nm3.
Sample Gas Flow Rate : Approx. 10 l/min
Response Time (Note 2):
Max.WImeasured Dead time Response time (63.2%)
50 or more
32 or more, less than 50
13 or more, less than 32
Less than 13
Approx. 30 sec or less
Approx. 27 sec or less
Approx. 23 sec or less
Approx. 21 sec or less
Approx. 60 sec or less
Approx. 53 sec or less
Approx. 47 sec or less
Approx. 41 sec or less
Note 2: Response time varies depending on the WI of a sample gas. This is due to the di󰀨erent sample gas ow rate of the
calorimeter. The ow rate is preset depending on the WI of the sample gas to prevent the caloric value at the detector
burner from exceeding the upper limit.
Utility :
Instrument Air ; Approx. 50 Nl/min, pressure 300 to 700 kPa, dew point of 0°C or less
Power Supply ; 100 V AC ± 10%, single phase, 50/60 Hz (Note 3), 860 VA max.
Note 3: When you perform a low caloric value measurement, the frequency variation should be within ±0.4%. If the frequency variation
exceeds ±0.4% (especially for exporting overseas), consult with Yokogawa.
nSteel Mill Application
Measurement Object : Measurement and control of WI or the caloric value of fuel gas for a
steel mill.
Measuring range : 3 to 62 MJ/Nm3
Sample Conditions:
Dust; 100 mg/Nm3 or less
Temperature; 50°C or less
Pressure; (1) 8 to 15 kPa
(2) 8 kPa or under: with pump
Range : Select scale range (Span):
General Gas; 30 to 50% of maximum value of the span
Butane or Butene + Air; 20 to 30% of maximum value of the span
Propane or Propylene + Air; 25 to 40% of maximum value of the span
Output : 1 to 5 V DC, 4 to 20 mA DC (simultaneously), non-isolated, load
resistance 750Ω or less
Alarm Contact Output :
Flame o󰀨 alarm;
100 V AC, 5 A, closed when alarm occurs (resistance load) when
contact is opened, the leakage current is 2 mA or less (100V AC)
Temperature alarm; 100 V AC, 3 A, closed when alarm occurs (resistance load)
Contact Input: Remote ignition (Custom order); 24 V DC, 0.1A or more
Repeatability :
Measurement Measuring range (Note 1) Repeatability
WI High caloric value
Low caloric value
0.5% of measured value
1.0% of measured value
Caloric value
MJ/Nm3
High caloric value
Low caloric value
1.0% of measured value
1.5% of measured value
Note 1: High caloric value means 6.3 MJ/Nm3 or more. Low caloric value means below 6.3 MJ/Nm3.

<1. Outline> 1-3
IM 11R02A01-02E 6th Edition :May 10, 2019-00
Sample Gas Flow Rate :Approx. 10 l/min.
Response Time (Note 2):
Max.WImeasured Dead time Response time (63.2%)
50 or more
32 or more, less than 50
13 or more, less than 32
Less than 13
42 sec or less
39 sec or less
36 sec or less
30 sec or less
70 sec or less
60 sec or less
50 sec or less
45 sec or less
Note 2: Response time varies depending on the WI of a sample gas. This is due to the di󰀨erent sample gas ow rate of the
calorimeter. The ow rate is preset depending on the WI of the sample gas to prevent the caloric value at the detector
burner from exceeding the upper unit.
Utility :
Water ; Approx. 0.2 l/min, pressure 200 to 600 kPa
Instrument Air ; Approx. 50 Nl/min, pressure 300 to 700 kPa, dew point of 0°C or less
Power Supply ; 100 V AC ± 10%, single phase, 50/60 Hz (Note 3), 1100 VA max.
Note 3: In case of low caloric value measurement, frequency variation should be within ± 0.4%. If frequency variation exceeds ± 0.4%,
consult with Yokogawa.
Panel:
Construction : For indoor installation, rack panel
Paint Color: Munsell 3.2PB7.4/1.2 (inside and outside)
Ambient Temperature:
0 to 40°C (little temperature variation,particularly no
rapid change )
1.2 ModelandSu󰀩xCodes
nCM6G Gas Calorimeter
Model Su󰀩xCode Option Code Description
CM6G - - - - - - - - - - - - - - - - - - - - - - - - - - - Gas calorimeter
-S6 - - - - - - - - - - Always - S6
Gas
Pressure
1
2
3
4
5
6
7
8
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
- - - - - - - - - -
Gas pressure 10 to 20 kPa for town gas, quake-proof
Gas pressure 10 to 20 kPa for town gas
Gas pressure 10 kPa or under for town gas
Gas pressure 100 ro 600 kPa for town gas
Gas pressure 8 to 15 kPa for steel mill, without preheating
Gas pressure 8 to 15 kPa for steel mill, with preheating
Gas pressure 8 kPa or under for steel mill, without preheating
Gas pressure 8 kPa or under for steel mill, with preheating
Measurement 00
10
- - - - - - - - - -
- - - - - - - - - -
WI measurement
Caloric value measurement (GD400G should be purchased
separately)
Power supply -5
-6
- - - - - - - - - -
- - - - - - - - - -
100 V AC 50 Hz
100 V AC 60 Hz
Range R- - - - - - - - - - Measuring range
Style *C - - - - - - - - - - Style C
Note: Measuring range and unit must be specied.
lStandard Accessories
Followings are the standard accessories supplied.
• Calorie Detector
Name Q’ty Remarks
Mirror
Fuse
1
2
For burner ame inspection
3.15 A (A1113EF)

<1. Outline> 1-4
IM 11R02A01-02E 6th Edition :May 10, 2019-00
• Orice Assembly
Name Q’ty Remarks
O-Ring
O-Ring
Hexagon Wrench
Hexagon Wrench
1
3
1
1
P16 (Viton) (Y9114XB)
P20 (Silicon) (L9817MT)
Nominal size 1.5 mm
Nominal size 2.5 mm
nGas Density Meter
Gas Density Meter compensates a density value in caloric value measurement.
It is not required for WI measurement.
Converter: GD400G-N-10-N-/PA
Detector: GD300S-J-/KU
Measuring range and unit (specic gravity or density) should be specied. See GS 11T3E1-01E
for further information.
nOption
You must purchase options separately.
Name Part no. Description
Probe H7800HA Insertion length 650 mm
Probe H7800HB Insertion length 1150 mm
Probe H7800HC Insertion length 1650 mm
Fulo lter G7043XJ Element material: Polypropylene
Pore size: 50 μm
Body: SUS 316
Connection: Rc 1/2
Pressure reducing valve G7008XF Primary pressure: 15 MPa max.
Secondary pressure: 0 to 200 kPa
Material: Brass
1.3 Standard Systems for Each Application
Application Measurement Systemspecication Su󰀩xcode*
Town Gas
WI
Without
density
meter
Gas pressure 10 to 20 kPa: Standard
Gas pressure 10 kPa or under: With pump
Gas pressure 100 to 600 kPa: With pressure
reducing value
-S6200
-S6300
-S6400
Caloric value
MJ/Nm3
With
density
meter
Gas pressure 10 to 20 kPa: Quake-proof
Gas pressure 10 to 20 kPa: Standard
Gas pressure 10 kPa or under: With pump
Gas pressure 100 to 600 kPa: With pressure
reducing value
-S6110
-S6210
-S6310
-S6410
Steel Mill
WI
Without
density
meter
Gas pressure 8 to 15 kPa: Without preheating
Gas pressure 8 to 15 kPa: With preheating
Gas pressure 8 kPa or under: Without preheating
Gas pressure 8 kPa or under: With preheating
-S6500
-S6600
-S6700
-S6800
Caloric value
MJ/Nm3
With
density
meter
Gas pressure 8 to 15 kPa: Without preheating
Gas pressure 8 to 15 kPa: With preheating
Gas pressure 8 kPa or under: Without preheating
Gas pressure 8 kPa or under: With preheating
-S6510
-S6610
-S6710
-S6810
*The code is basic for gas pressure and measurement.
Note: A wet sample gas in the town gas application is outside the scope of the standard specications. Consult
with Yokogawa.

<1. Outline> 1-5
IM 11R02A01-02E 6th Edition :May 10, 2019-00
nInstructions for System Selection
● The quake-proof type gas calorimeter is always equipped with the density meter.
● The CM6G Gas Calorimeter controls the ow rate under a constant di󰀨erential pressure. In
the caloric value measurement, if the density of a sample gas changes, a ow rate error
proportional to the reciprocal of the square root of the density of the sample gas, 1/ ρg,
will be generated, which directly a󰀨ects the caloric value. Therefore, density compensation
is required using a density meter.
For the WI measurement, a density meter is not required since the WI is a value
proportional to 1/ ρg.

<1. Outline> 1-6
IM 11R02A01-02E 6th Edition :May 10, 2019-00
1.4 ExternalDimensions
nFor Town Gas Applications
0
400
550
700
900
300
900 500 100
800800 500
1800100
700
100
130
250
Approx.70
900
100
Approx.1970
800
740
30 30
Front
Back
View X
E
D
B
A
C
Density meter
converter
Density meter
detector
Flowmeter for
density meter
Computing
station
Calorie detector
4-Ø14 holes
X
Mark Name Connection
A SAMPLE GAS IN Rc1/4
B
SAMPLE GAS OUT OR VENT Rc1/2
C INST.AIR IN Rc1/4
D STD.GAS IN Rc1/4
E STD.GAS IN Rc1/4
Maintenance Space
*
*
*
* CM6G-S610 (with density meter) only
CM6G-S6200, S6210, S6300, S6310, S6400, S6410
Unit: mm
Dim-6210.ai
Weight: Approx. 300kg

<1. Outline> 1-7
IM 11R02A01-02E 6th Edition :May 10, 2019-00
nFor Town Gas Application (Quake-proof Type)
Front
Back
X
Mark Name Connection
A SAMPLE GAS IN Rc1/4
B INST.AIR IN Rc1/4
C1 STD.GAS IN (ZERO) Rc1/4
C2 STD.GAS IN (SPAN) Rc1/4
D SAMPLE GAS OUT OR VENT Rc1/2
Maintenance Space
CM6G-S6110
Unit: mm
850
1000
0
700
800 500
1000 100500
1500100
300700
100600
Approx. 1670
90 90
1000
100800100
700
30 640 30
400
View X
D
Ø120 hole
A
BC2
C1
4-Ø15 holes
Wiring to switch box should be made
through the bottom.
Computing station
Density meter
converter
Flowmeter for
density meter
Calorie detector
Dim-6110.ai
---CM6G---
C
A
M
△
▽
PF
FAIL
ALM
YOKOGAWA◇
<
<
<
<
SHIFT
TREND 3
Y2
Y1
X3
X1
500.0
90.00
35.00
18.00
100.00
1000.0
23.02
37.67
0.0
0.00
23.02
14.65
O
C
▼
▼▼▼
Weight: Approx. 350kg

<1. Outline> 1-8
IM 11R02A01-02E 6th Edition :May 10, 2019-00
nFor Steel Mill Application
Front
Back
X
Mark Name Connection
A SAMPLE GAS IN Rc1/2
B SAMPLE GAS OUT Rc1/2
C SAMPLE GAS OUT Rc1/2
D STD.GAS IN Rc1/4
E WATER IN Rc1/2
F DRAIN OUT Rc1/2
G INST.AIR IN Rc1/4
H SAMPLE GAS VENT Rc1/4
Maintenance Space
*
*
*
* CM6G-S610 (with density meter and flowmeter)
CM6G-S6500, S6510, S6600, S6610, S6700, S6710, S6800, S6810
Unit: mm
0
200
300
750
1500
1650
1900
100
0 500 600 700 800 350
800
800 500
900260
540 500
900
700
(100) 100
100
740 30(30)
Approx.1160
Approx. 70
60
100
150
800
40
60
80
80
Approx.1970
View X
Computing
station
Flowmeter for
density meter
Density meter
converter
H
G
F
E
D
B
A
4-Φ14 holes
Calorie detector
C
Density meter
detector
Pump **
** CM6G-S670, CM6G-S680 (with pump)
Dim-6810.ai
Fulflo filter
Dehumidifier
Drain pot
Washing bubbler
Pressure regulating
pot
Weight: Approx. 350kg

<1. Outline> 1-9
IM 11R02A01-02E 6th Edition :May 10, 2019-00
nDimensions of Options
lProbe
18
)( 350Insertion length L
Φ34
Part number L
H7800HA Approx. 650
H7800HB Approx. 1150
H7800HC Approx. 1650
JIS 10K-80-FF Equiv. SUS304 Rc1
Unit: mm
H7800HA.ai
lFuloFilter(Partno.:G7043XJ)
Approx. 350
108 Rc1/2Rc1/2
Unit: mm
l PressureReducingValve(Partno.:G7008XF)
T
A
K
A
O
H
I
H
閉
開
C
Approx. 119
Approx. 120
Approx. 38 Approx. 62
Rc1/4
F2-8.ai
Outlet
Handle for
pressure control
Handle for
stop valve
Secondary pressure
gauge
0.3MPaG
Stop valve
Outlet Approx. 166
Approx. 81
Safety valve
Nut
Inlet
W22 Left-hand thread
Daiflon packing
Unit: mm
Primary pressure
gauge
25MPaG

<1. Outline> 1-10
IM 11R02A01-02E 6th Edition :May 10, 2019-00
1.5 Principle of Measurements
The instrument detects the temperature di󰀨erence, using a thermocouple, between the exhaust
combustion gas made after sample gas is burnt in the burner, and the feed air at the inlet of
the burner. Then the instrument amplies the value of temperature di󰀨erence. It adds the
compensating calculation to the output signal and measures the caloric value of WI.
GAS
AIR
DIFFERENTIAL
PRESSURE
DETECTION
BURNING
MIXING
BLOW
PRIMARY
SECONDARY
TERTIARY
AIR
DIVIDING
OUTPUT
SIGNAL
COMPENSATING
CALCULATION
Figure 1.1 Measurement principle diagram
When the sample gas is completely burnt by the air, the formula of the increased temperature is
as follows:
∆θ = (1.1)
Cps • Fs
K • Fg
where K: Caloric value of the sample gas
Fg: Flow rate of the sample gas
Fs: Air-diluted combustion exhaust gas ow rate
Cps: Constant pressure heat ratio of air-diluted combustion exhaust gas
Air ow rate Fa is big enough compared with the sample gas ow rate Fg (Fa:Fg=50-200:1)
and Cps Cpa, Fs Fa+Fg=Fa ( 1 + g ), therefore, the formula (1.1) is as follows:
∆θ = (1.2)
Cpa • Fa (1 + g)
K • Fg
where Fa: Air ow rate
Cpa: Air constant pressure heat ratio
g: Fg/Fa
When using orice and take out Fa, Fg as a di󰀨erential pressure of before and after orice, Fa
and Fg are represented by the following formula:
Fa = Ka (1.3)
ρa
∆ Pa Fg = Kg ρg ∆ Pg
where: ∆Pa, ∆Pg: Air, gas di󰀨erential pressure between before and after orice
ρa, ρg: Density of the air and the gas
ka, kg: Orice constant gure of the air and the gas
(Orice coe󰀩cient  orice sectional area)

<1. Outline> 1-11
IM 11R02A01-02E 6th Edition :May 10, 2019-00
If insert formula (1.3) into formula (1.2), ∆θ is represented by the following formula:
∆θ = C.K. (1.4)
ρg
1
ρa
•∆Pa
∆Pg
(C =
Cpa (1+g)
1• • )
Ka
Kg
According to formula (1.4), if ∆Pa, ∆Pg are constant, temperature di󰀨erence ∆θ is in proportion
to WI ( K/ ρg ) or caloric value (K). Thus we can measure continuously WI after ∆θ
measurement, and the caloric value after the measurement and calculation of the density.

Blank Page

<2. Installation, Piping, Wiring> 2-1
IM 11R02A01-02E 5th Edition : Dec. 28, 2016-00
2. Installation, Piping, Wiring
2.1 Installations
Observe the following conditions when you install instruments.
(1) Adequate space for maintenance should be provided around the gas calorimeter.
* See “External Dimention” on 1.4.
(2) The base should be horizontal..
(3) Ambient temperature is 0 to 40°C and no rapid change in ambient temperature is allowed.
*Rapid change here means a change of approximately 10°C within 30 minutes.
(4) Install the instrument in the place where it is not directly exposed to the current of a
conditioned air.
(5) Minimal vibration( If much vibration is unavoidable, take an appropriate measure to absorb
shock, e.g, use of vibration-proof robber).
(6) A ventilation system should be provided.
(7) Corrosive gases and dust are present in small quantities and humidity is low.
(8) The water of the sampling system and the drain line do not freeze up.
WARNING
From the moment the ignition starts until it completes, or right after the ame extinction, sample
gas mixed with the air will be released from the top of the equipment into the installation space of
the equipment. Use the equipment in a well ventilated environment equipped with a ventilation
system.
2.2 Externalpiping
Refer to the drawing Figure 1.4. on the connections on the panel
The principal points to be taken care are as follows:
• Bent the outlet of the bent piping as U shape, and prevent it from the rain penetration. Set
the outlet at higher position as much as possible where there is little fear of physical danger.
• Drain piping shall be conducted below the level of drain outlet on the panel and conrm no
drain is accumulated on the panel bed.
• It is necessary for the sample line of the instrument for steel mill use to provide a slope of
more than 1/3, so that there is no blockade to the gas line by the drain at the bending part of
the piping. Make piping as short as possible. Equip the sample line with thermal insulation
so as to prevent the drain in the pipe line from freezing.
• Locate the standard gas cylinders at the place where they are comparatively cool and not
exposed to direct sunshine.