CMG Series Gas Flow Monitor USA Model User`s Manual
Contents
1. actual prohibited action The example on the left notifies the user that disassembly is prohibited Filled in black circles instruct the user to carry out a specific obligatory action to prevent possible danger These icons graphically represent the actual action to be carried out The example on the left instructs the user to remove the plug from the outlet h WARNING When using combustible gas install the device upstream of the safety shut off valve If air somehow enters the piping and the sensor makes a spark due to some cause like a lightning strike when an explosive mixture is present an explosion could occur inside the pipe On flanged models do not use the device or installed pipes as a footrest Doing so might damage the device or piping or cause a slip which might result in injury Flanged models are heavy Dropping them on your feet may cause injury The device is intended for use with natural gas and air Do not use the device for other types of gases Use of the gases having an ignition temperature lower than 365 C may cause an internal pipe explosion A heater incorporated in a sensor could act as an ignition source if air has entered the piping and explosive mixed gas is produced Use the analog outputs and alarm contact outputs on the device for monitoring the gas flow rate of a burner or other equipment Do not use these outputs in applications where safety will be impaired when an analog output abnorma2. indicator automatically lights and the display returns to the integrated flow rate display 3 Press the key again within five seconds while it is displayed P The first four digit display You can also alternately display the first four digits and the last four digits by using the 4 key repeatedly LT Handling Precautions 14 e The total flow rate indication returns to after 7774444 is exceeded e Integrated flow rate and total flow rate values are held in memory even if the power is turned OFF On models that display values down to two digits past the decimal point data is written into memory when the ones digit changes or one hour after the previous writing On models that display values down to one digit past the decimal point data is written into memory when the tens digit changes or one hour after the previous writing Integrated values that have not been written to memory are discarded when the power is turned OFF The total flow rate reset setting can be configured to either the enabled or disabled condition using the function setup If the Reset is performed by key switch setting has been selected press the reser key for 2 seconds or more while displaying the total flow rate The total flow rate and integrated flow rate will be reset and initialized to vn Chapter 5 ADVANCED OPERATION 5 1 Function Setup R Setting operation Follow the procedure below to set functions such as alarm
3. limit alarm occurs CF indicator Lights during integrated flow rate display Goes out during total flow rate display Hi indicator Blinks when the upper limit alarm occurs Blinks once at each pulse output CFH indicator Lights during instantaneous flow rate Alarm indicator Blinks when an alarm occurs Display Displays the instantaneous flow rate value integrated flow rate value total flow rate value function setting values and parameter setting values on a in 7 segment LED display FA ALARM RESET key Use this key to reset alarms integrated flow rate 4 key Use this key to feed digits when changing setting values Also use it to move to the parameter setup mode Operation unit cover Open this cover to configure or reset various settings Wiring hole There are two wiring holes Insert the plug and seal packing provided in the unused hole Outlet This is where the fluid to be measured flows out display DISP key Use this key to switch between instantaneous flow rate display and integrated flow rate display and from setup mode to instantaneous flow rate display Akey Use this key to increment a value wey Use this key to decrement a value Also use it to switch to the function setup mode Operation panel Use this panel to set functions parameters alarms or alarm occurrence wait time and to reset alarms or reset the integrated flow rate ENT key Use
4. locked while it is enabled Flow rate alarm detection condition selection 1 Only the upper limit alarm is detected 2 Only lower limit alarm 1 is detected 3 Upper limit alarm and lower limit alarm 1 are detected 4 Only lower limit alarm 2 is detected 5 Upper limit alarm and lower limit 0 Alarm detection is not performed The alarm detection flow rate is set in the parameter setup mode Lower limit alarm 1 A flow rate less than the lower limit of the measurement range is not judged to be an alarm Lower limit alarm 2 A flow rate less than the lower limit of the measurement range is judged to be an alarm alarm 2 are detected 0 Not used OFF at all times ON when upper limit alarm occurs ON when lower limit alarm occurs ON when upper limit alarm or lower limit alarm occurs 4 ON when integration event occurs Not used OFF at all times 5 ON when upper limit alarm occurs ON when lower limit alarm occurs ON when upper limit alarm or lower limit alarm occurs 4 ON when integration event Event output 1 relay function assignment Event output 2 open collector function assignment occurs 5 Integrated pulse output Only reset by key switch Reset by key switch or automatic reset by normal recovery of flow rate Reset disabled Reset by key switch only Only automatic reset after the integration reset delay time when the integration event occurs Rese
5. or LY key to change to the desired value The digit to be changed can be moved by using the L4 key 5 When the desired setting has been selected press the Ent key to finalize the setting After approx one second the item number is redisplayed and the setting is updated 6 If there are other required setup items return to step 3 above to repeat the procedure If there are no other setup items proceed to step 7 7 Press the 6 key K The display changes from the parameter setup mode to the instantaneous flow rate display LT Handling Precautions e If there is no input for one minute after the parameter setup mode begins the display automatically returns to the instantaneous flow rate display s If you press the key without pressing the EJkey after carrying out the operation in step 4 the setting remains at the previous value without being updated 17 Chapter 5 APPLICATION OPERATION E Parameter setup item list No lien displayed Item Description Factory Setting Setting Range TRN C1 Instantaneous flow rate Upper limit of 0 to 150 of Selection of an alarm upper limit alarm measurement range measurement detection condition is CFH normal upper limit required in function setup CFH normal e te Hysteresis for Within 2 of O to 100 of instantaneous flow rate measurement upper measurement upper limit alarm limit CFH normal upper limit CFH normal Instantane
6. used is mass flow e A bypass structure using an orifice enables low pressure loss and prevents the influence of mist etc e Self diagnostic functions simplify remedies during troubleshooting Chapter 1 INTRODUCTION R Model selection guide CMG 1 LIU La LN Lv v vu vm ix Natural gas 13A model LNG CH 88 Talble Piping size ris o RTT S SS res o f hnn ooo o nn o s oO nn Connectionmethod T 2 o O O o Nme O m f easye TNGT O o o Nags IV Flow range 015 O 150CFH normal 1 o0 o TD CFH normal 7 o o 2500CFH normal 7 500 O 5 000 CFH normal 1 v omn 1 CE OT OT o o 1oom om vi Operaingpressre 0 o O O o OtotaSpsi i0oKPa O vw omm o o O o O None vm Powersuppy o O o o o aw x om a o o oo e Air model Selection Model Number Gas Flow Monitor Piping size 1 2 inch 1 1 2 inch 1 2 inch Connection method NPT thread Gas type Flow range 2 500 CFH normal 1 aua Fixed 1 Normal refers to the volumetric flow rate CFH after converting to 32 F 1 atmosphere Output Chapter 2 NAMES AND FUNCTIONS OF PARTS OVER indicator Lights when the flow rate exceeds the measurement range Blinks when the integration event occurs Lo indicator Blinks when the lower
7. Between each terminal and flow path metal parts min 50MQ 500Vdc megger P54 JIS C 0920 splash proof and dustproof structure EN61326 1 1997 A1 1998 EN61010 1 2001 4 F 90 RH or less no condensation allowed Vdc 4Vdc 10 5W or less low quantity adjusted for 32 F and 1 atmospheric pressure 1 RD 1 digit 68 F I O l A B Lae Event output 1 Event output 2 Conduit size Vibration resistance Shock resistance Voltage resistance O1 Insulation resistance Protection Applicable standards gt Q D Over voltage category Category Il Pollution degree Pollution degree 2 2000m or less Natural gas composition LNG methane 88 46MJ m N N Chapter 7 SPECIFICATIONS B Individual specifications Item Model No CMG502 Pipe size and connection 2NPT thread Measurement range CFH normal 500 to 5 000 Indication range CFH normal 0 to 6 000 Straight piping length 16 inch min Mask color ee 1 The number of digits displayed after the decimal point for CFH is the same as that shown in the table 2 Normal refers to the volumetric flow rate CFH after converting to 32 F 1 atmosphere 3 The measurement range is the flow rate range in which instantaneous flow rate display accuracy is stipulated 4 Straight pipe longer than the length specified above may be required depending on the pipe shape or other devices mounted on the piping The length of downstream straight pipe secti
8. No CP UM 5477E CMG Series Gas Flow Monitor USA Model User s Manual Thank you for purchasing the CMG Series Gas Flow Monitor This manual contains information for ensuring the correct use of the CMG Series It also provides necessary infor mation for installation maintenance and troubleshooting This manual should be read by those who design and maintain equipment that uses the CMG Series Be sure to keep this manual nearby for handy ref erence Yamatake Corporation RESTRICTIONS ON USE This product has been designed developed and manufactured for general purpose application in machinery and equipment Accordingly when used in applications outlined below special care should be taken to implement a fail safe and or redundant design concept as well as a periodic maintenance program e Safety devices for plant worker protection e Start stop control devices for transportation and material handling machines e Aeronautical aerospace machines e Control devices for nuclear reactors Never use this product in applications where human safety may be put at risk NOTICE Be sure that the user receives this manual before the product is used Copying or duplicating this user s manual in part or in whole is forbid den The information and specifications in this manual are subject to change without notice Considerable effort has been made to ensure that this manual is free from inaccuracies and omissions If
9. ately The probable cause is an error in the memory which is with the flow rate value individually adjusted for each sensor E r r is displayed but the operation continues with provisional data in spite of the error Readjustment by Yamatake is necessary The display is other than O UU Check the shut off valve and piping for any leaks If the valve and including a minus display even piping are free of leaks a probable cause is that the device s though the instantaneous flow characteristics have changed Contact your Yamatake agent as rate should be zero repair by Yamatake is necessary A minus is displayed for the Make sure that the arrow marked on the flow path matches the instantaneous flow rate direction of gas flow Correct the directions if it is reversed Indicated flow rate varies e Check that the straight pipe section is long enough significantly e If the problem seems to be foreign matter stuck to the sensor or the effects of a pulsating flow contact Yamatake Corporation LT Handling Precautions Erre memory error indicates that the individual adjustment data for the flowmeter s internal sensor has been lost Accuracy cannot be guaranteed if use of the flowmeter is continued in this state Ask for repair 20 Chapter 6 MAINTENANCE AND TROUBLESHOOTING R How to replace the fuse CAUTION When touching internal parts touch a grounded metal part to discharge static electricity from the body Otherwise static el
10. detection and event output assignments 1 Press the key to display the instantaneous flow rate K The CFH indicator lights 2 Hold the and keys down simultaneously for 3 seconds K Item No C 01 is displayed on the 7 segment display and the mode changes to function setup mode 3 Press the La or LY key to select the desired setup item and press the key K The current setting blinks on the 7 segment display 4 Press the La or LY key to select the desired setting 5 When the desired setting has been selected press the key to finalize the setting After approx one second the item number is redisplayed and the setting is updated 6 If there are other required setup items return to step 3 above to repeat the procedure If there are no other setup items proceed to step 7 7 Press the be key K The display changes from the function setup mode to the instantaneous flow rate display LT Handling Precautions e If you do nothing for one minute after entering the function setup mode the display automatically returns to the instantaneous flow rate display s If you press the 69 key without pressing the Lt key after carrying out the operation in step 4 the setting remains at the previous value without being updated 15 Chapter 5 APPLICATION OPERATION R Function setup item list Settings description Key lock 0 Key lock disabled The key lock can be disabled even 1 All settings key
11. e and to avoid any influence to the device even if backfiring occurs Pressure increase in the piping or fire caused by backfire of the burner could damage the device When disposing of the device observe local regulations Unpacking Check the following items when removing the CMG series from its package 1 Check the model number to make sure you received the correct product 2 Check for any obvious damage 3 Check the contents of the package against the packing list to make sure that all items are included Handle the CMG series and its accessories with care to prevent damage or loss of parts If there is some problem with your order please contact your dealer immediately Body CMG___ 1 See model selection guide page 2 81503603 001 Attached to one of the wiring holes Packing seal MPA 50003 7 Conventions Used in This Manual The following conventions are used in this manual C Handling Precautions Handling Precautions indicate items that the user should pay attention to when handling the CMG Series Note Notes indicate information that might benefit the user 1 2 3 Numbers in parentheses indicate steps in a sequence or parts of an expla nation ili Contents SAFETY PRECAUTIONS Unpacking Conventions Used in This Manual Chapter1 INTRODUCTION E Introduction 2 0 ccc cee eee nett ences E PAS i or oe oe a wo ee ee es R Model selection guide
12. ectricity may damage components Before replacing the fuse be sure to turn the power OFF Failure to do so might cause electric shock Be sure to use a fuse having an electrical rating of 250V and 0 5A for replacement Use of a non rated fuse prevents the safety circuit from functioning properly Needed items Phillips screwdriver Fuse Made by Cooper Bussmann U K Ltd Model No S504 500mA 250V 0 5A Made by Littelfuse Model No 218 500 250V 0 5A Standard IEC127 Fuse blowout speed Time lag Rated voltage 250V Rated current 0 5A Replacement procedure 1 Loosen the four screws on the operation panel display 2 Gently lift up the operation panel display 3 Remove the fuse cover For details see Chapter 2 NAMES AND FUNCTIONS OF PARTS 4 Remove the fuse 5 Attach the new fuse 6 Attach the fuse cover 7 Attach the operation panel display in its original position on the sensor terminal section LT Handling Precautions When a fuse blows check for abnormal power voltage miswiring or other causes of the fuse having blown Replacement of parts is precision work Take sufficient care not to lose or damage removed components 21 Chapter 7 SPECIFICATIONS E Common specifications Item Specifications Applicable gas Natural gas air according to model No Material Flow path section aluminum alloy NPT thread Display section PBT GF 30 Instantaneous flow rate display Meas
13. eee cece eens Chapter 2 NAMES AND FUNCTIONS OF PARTS Chapter 3 MOUNTING AND WIRING Chapter 4 OPERATION Chapter 5 ADVANCED OPERATION 5 1 FUNCTION SCIUD cence uta cceeessi atone sion caean abate eens ee awae a Sew Displaying the flow rate 0 ce ee ee eee eens Resetting LAV IVNG vo ooo e E R oo he boos wee we de E Resetting the integrated flow rate eee eee Displaying the total flow rate 0 cece eee tenes Chapter 6 Chapter 7 E Setting Operations 1445 s 20044 vee nha ewes cee enone ee eee ee eats E Function setup item list 6 cece eee eee Parameter Setup M Setting Operauion 12434 s 20a veer ewes epee nese ree eee ee eats R Parameter setup item liet e cece e eee eee MAINTENANCE AND TROUBLESHOOTING E Remedying trouble sees eee e eee R How to replace the fuse eee e eee SPECIFICATIONS Common specifications EE andy es Wien crag Staion Secon ee ances Sane cas A te ata atin pen aie ae atte tee es individual specifications E aca pte ae a Gt aga ae ae ee a ee Pressure loss for alr ee ee eee eee teen teen ee eees External GiIM NSIONS 0 cee eee ee eee eee e eee eee eee Chapter 1 INTRODUCTION R Introduction The CMG gas flow monitor is a flowmeter for measuring the fuel flow rate of gas burners that use a Micro Flow sensor chip a thermal flow speed sensor made using Yamatake propri
14. erized by the following 1 Operating temperatures that fall below 14 F and rise above 140 F 2 Operating humidity that exceeds 90 RH 3 Sudden changes in temperature and condensation 4 Corrosive gases and flammable gases 5 Abundant conductive substances e g dust salt or iron dust or organic solvents 6 Vibration or shock 7 Direct sunlight 8 Direct splashing by rain or water 9 Splashing by fluids e g oil chemicals 10 Strong magnetic or electrical fields 11 Where there is a pulsating flow 1 One cause is flexible piping regardless of the material with an accordion shape inner surface and a length of 500mm or more Flexible piping such as a rubber hose with a flat inner surface does not cause pulsation 2 Another cause is a reciprocating or rotary type gas booster or a flow meter having rotary motion like a Roots meter 12 Where soot or moisture generation in the piping is expected due to fluctuation in gas composition etc Gas flow a Handling Precautions Make sure that the gas flows into the device in the direction indicated by the FLOW arrow on the side of the flow path Otherwise the flow rate cannot be measured correctly Chapter 3 MOUNTING AND WIRING E Pipes Precautions for piping installation Straight pipe section To be sure the straight pipe section is long enough refer to pages 23 24 This device is a precision instrument If foreign matter such as dust oil mist or
15. etary technology The CMG displays and outputs the volume flow rate in a standard state and does not require conversion for temperature and pressure The CMG has the following functions instantaneous flow rate display integrated flow rate display alarm contact output instantaneous flow rate output according to analog output integrated pulse or event output according to open collector output These functions enable detailed air fuel ratio management of burners and flow rate management of units Factory setting is 32 F 1 atmosphere The reference temperature can be selected from 41 F 50 F 59 F 68 F and 77 F according to the function settings E Features e Installation of the compact and high precision CMG is simple It can be mounted in any direction as the direction of the display can be changed e Gas flow rate can be measured and managed easily on the digital flow rate display and Hi Lo OVER and ALARM LED displays e Display on panels and flow rate management can be performed easily using output of the gas flow rate upper lower limit settings and analog output of instantaneous flow rate e Fuel usage can be easily understood because the instantaneous flow rate and integrated flow rate displays can be switched by one touch operation The total flow rate since this device was installed can be displayed e Compensation of display values is not needed even if temperature and pressure change as the measurement method
16. fferent combination numbers are combined accuracy can no longer be guaranteed The combination numbers are each displayed on the operation panel display and sensor terminal section 11 Chapter 4 OPERATION CAUTION S Do not operate the keys with a mechanical pencil screwdriver or other sharp tipped object Doing so might damage the keys B Displaying the flow rate The following values can be alternated on the 4 digit 7 segment LED display 1 Instantaneous flow rate 2 Integrated flow rate The following shows the operation flow for displaying the flow rate Hold down key for at least five seconds Integrated flow rate past the decimal point key or When integrated flow rate is Integrated flow rate key 10000CF or more Integrated flow rate last four digits first four digits Js ey When integrated flow rate is 9999CF or less Instantaneous flow rate Displaying the instantaneous flow rate and integrated flow rate When the power is turned ON the CFH indicator lights to indicate the instantaneous flow rate To display the integrated flow rate press the key K The CF indicator lights to indicate the integrated flow rate e The display is a 4 digit display However the integrated flow rate is displayed as eight digits divided into the first four digits and the last four digits In all an integrated flow rate up to 7774444 can be displayed e When the last four di
17. gits are displayed the decimal point lights to the right of the last digit When the integrated flow rate is 4949 CF or less pressing the f key again returns the display to the instantaneous flow rate display When the integrated flow rate is 0 CF or more pressing the pe key displays the first four digits of the integrated flow rate You can also alternately display the first four digits and the last four digits by repeatedly pressing the L4 key For example if initial reading is 0217 and the 2nd reading is_ _ 44 the integrated flow rate is _ Sera CF If the key is held down for at least five seconds when switching to the integrated flow rate display from the instantaneous flow rate display digits past the decimal point for the integrated flow rate are displayed 12 Chapter 4 OPERATION LT Handling Precautions e When the flow rate exceeds the upper limit of the measurement range the OVER indicator light and goes out after the flow rate returns to within the measurement range e The integrated flow rate factory setting is e The integrated flow rate indication returns to after 99999999 is exceeded e The flow rate is integrated even if the flow rate is outside of the measurement range Regard integrated values as a means for grasping the whole quantity of flow E Resetting alarms When a flow rate alarm detection condition is selected an item from 1 to 5 in function setup item C 06 see page 19 an alar
18. lant Do not coat the top two threads of the screw Remove any dirt burrs or piping cutting oil from inside the pipes LU Handling Precautions Do not overdo the sealant and do not allow dirt burrs or piping cutting oil to enter the pipes as this might cause measurement error Good example Bad example Sealant Sealant Chapter 3 MOUNTING AND WIRING Connecting pipes Connect pipes while gripping the hexagonal section of the pipe connection port on the body with a wrench a Handling Precautions e Do not grip the display or sensor terminal section Doing so might damage the body or cause leakage e Do not tighten the pipe at a torque that exceeds the maximum tightening torque Chapter 3 MOUNTING AND WIRING E Wiring CAUTION S Prevent the load connected to the output terminal from exceeding the rating indicated in the specifications Failure to do so might cause damage Be sure to check that the wiring is correct before you turn the power ON Q Incorrect wiring might cause damage or malfunction The following table describes the meaning of symbols indicated on the terminal layout label on the CMG Direct current Removing the operation panel display Required tool Phillips screwdriver 1 Loosen the four screws on the operation panel display using the Phillips screwdriver 2 Gently lift up the operation panel display and disconnect its power lead connectors Wiring Internal ci
19. lity or alarm contact output malfunction occurs Before wiring the device be sure to turn the power OFF Failure to do so might Q cause electric shock CAUTION This device is a precision instrument Do not drop it nor subject it to shock Doing so might damage the device connect the piping Doing so might allow foreign objects to enter the connector port and cause defective operation On rusty welding fumes slag water droplet oil mist or dusty piping install a filter upstream to prevent foreign matter from entering the device Foreign matter may cause faulty operation When wiring take care not to tug on the display The components inside Q might become damaged S Do not peel off the pipe connection port seals until immediately before you Be sure to use only rated fuses for replacement Use of a non rated fuse prevents the safety circuit from functioning properly Be sure to check that the wiring is correct before you turn the power ON Q Incorrect wiring may cause damage or malfunction Connect the power supply last Otherwise touching terminals by mistake may cause electric shock or damage the device Make sure that the load to be connected to terminals does not exceed the Q rating indicated in the specifications il CAUTION Supply power at the voltage indicated on the model number label on the device Take the necessary countermeasures with the instrumentation to prevent the occurrence of backfir
20. low rate CFH normal 45 CMG252 Supplied pressure ios O psi 1 atmosphere 35 mae wm 25 c9 Oo o 15 gt E D 9 0 400 800 1200 Flow rate CFH normal _ CMG402 Supplied pressure g 120 O psi 1 atmosphere ap O x 80 V U Oo 40 2 Si o 75 DS 0 s 0 500 1500 2500 3500 Flow rate CFH normal 420 CMG502 Supplied pressure Q O psi 1 atmosphere ap x 80 v op Oo a 40 D Si 2 A Q 0 2000 4000 6000 Flow rate CFH normal Note The pressure loss varies with the supplied pressure Determine the pressure loss based on the pressure curve s most near to the actual supplied pressure e The pressure loss of the natural gas can be obtained by multiplying the above pressure loss by the specific gravity of natural gas 0 64 25 Chapter 7 SPECIFIC ATIONS Unit inch E External dimensions CMG152 252 G 1 2 thread with min depth 0 4 AA oor i f co E K O S lt D T CMG252 1NPT CMG152 1 2NPT CMG402 502 1 06 G 1 2 thread with min depth 0 4 CMG502 2NPT CMG402 1 2NPT 26 Revision History Date apr 2007 GP UM SA77Elist Edition Yamatake Corporation Advanced Automation Company 1 12 2 Kawana Fujisawa Kanagawa 251 8522 Japan URL http www azbil com Printed on recycled paper 07 azbil Specifications are subject to change without no
21. m is set To reset the alarm press the key K The alarm indicator goes out and the alarm output relay turns OFF LT Handling Precautions Alarms are also reset by turning the power OFF The alarm recurs after the alarm occurrence wait time when the flow rate exceeds the preset alarm value after the flow monitor is re energized R Resetting the integrated flow rate Hold the key down for at least two seconds while the integrated flow rate is displayed K The integrated value becomes 0 LT Handling Precautions Holding down the reset key for two seconds or more while an alarm is occurring merely stops the alarm it does not reset integrated values In this case reset the alarm after the flow rate has returned to within the preset alarm range and then hold down the ese key again for two seconds or more 13 Chapter 4 OPERATION R Displaying the total flow rate This function displays the total flow rate since the device was installed Reset cannot be performed by the same reset operation used for integrated flow rate 1 Press the key until the integrated flow rate is displayed K The CF indicator lights 2 Hold the key for one second or more K The CF indicator goes out and the total flow rate is displayed for 5 seconds The total flow like the integrated flow rate is displayed in the divided upper four digits and lower four digits in total 8 digits capable of displaying the maximum W779 CE After that the CF
22. on is a standard value Straight pipe section rough guidelines Same diameter pipe diameters A and B are the same Upstream elbow Downstream elbow As per individual specifications As per individual specifications e Different diameter pipe diameter A is different from diameter B D inner dia connecting pipe Upstream side enlarged Downstream side reduced Different diameter socket Different diameter socket Upstream side reduced Downstream side enlarged Different diameter socket Different diameter socket 23 Chapter 7 SPECIFIC ATIONS Upstream side enlarged Downstream side reduced Enlarging pipe is used Reducing pipe is used Upstream side reduced Downstream side enlarged Reducing pipe is used Enlarging pipe is used e Valves fully open D inner dia of connecting pipe Upstream Downstream Globe valve or needle valve 30D Ball valve 10D Oo Handling Precautions In case of globe butterfly or needle valves which cause disturbance or fluctuations to the flow a straight pipe length of more than 30D is required Install a flow adjusting valve as far downstream of the CMG as possible Contact Yamatake Corporation for valves other than the above 24 Chapter 7 SPECIFICATIONS mM Pressure loss for air 70 CMG152 Supplied pressure Q 0 psi 1 atmosphere C3 2 50 Xx v 8 30 15 psi a gt H 10 50 psi 75 psi ad i A 0 i 0 50 150 250 F
23. ous flow rate Lower limit of 0 to 100 of lower limit alarm measure range measurement CFH normal upper limit CFH normal Hysteresis for Within 2 of 0 to 100 of instantaneous flow rate measurement upper measurement lower limit alarm limit CFH normal upper limit CFH normal Delay timing for 60 0s 0 0 to 999 9s instantaneous flow rate alarm judgment Integration event setup 0 to 99 999 999 Value set is valid only when lower four digits CF selecting integration event Integration event setup en either L 02 or i upper four digits QY Of function setup Integration reset delay 10 0s 0 0 to 999 9s_ Value set is valid only when time selecting automatic reset by integration reset delay in GB of function setup Instantaneous flow rate 20 to 20 of bias PV bias measurement upper limit CFH normal Instantaneous flow rate Upper limit of 0 to 150 of output 20mA scaling measurement range measurement CFH normal upper limit CFH normal Instantaneous flow rate O to 100 of output 4mA scaling measurement upper limit CFH normal O P k h N G aN C2 N NO Gas composition 1 000 0 100 to 4 000 compensation coefficient Note Normal refers to the volumetric flow rate CFH after converting to 32 F 1 atmosphere LT Handling Precautions 1 Be certain to set a flow rate that is less than the display upper limit Alarm detection will not operate if flow rate is
24. ration panel display On this device the operation panel display can be rotated up to 180 to an easy to view position Follow the procedure below to mount the operation panel display 1 Connect the connectors of the leads from the operation panel display to the sensor terminal section 2 Rotate the display to the most easily visible position 3 Fasten the operation panel display onto the sensor terminal section with screws CCW rotation max 180 gt lt a i CW rotation max 180 Operation panel display Combination No indication Connector leads Sensor terminal section Chapter 3 MOUNTING AND WIRING a Handling Precautions The maximum screw tightening torque is 1 0N m The IP54 seal might be impaired if screws are too tight or too loose Arrange the leads connecting the sensor terminal section and the operation panel display so they are not unnecessarily twisted or pinched when fitting the sections together Prevent the leads connecting the sensor terminal section and the operation panel display from being damaged Do not rotate the operation panel display beyond 180 to the left or right This section may be rotated to the left or right if it is mounted upside down Use an operation panel display and a sensor terminal section with the same combination of combination numbers Combination numbers differ from device to device as each device is adjusted individually If di
25. rcuit CNT aile Terminal 1 24Vdc Terminal 2 COM Terminal 3 OUTPUT 4 to 20mAdc output Open collector output Terminal 4 EVENT2 ADC power supply can also be used for the load that is wired to terminals 5 and 6 Terminal 5 RELAY Terminal 6 RELAY X Description Analog output 4 to 20mAdc EVENT2 Event output 2 NPN open collector integrated pulse RELAY Event output 1 contact output relay output 6 RELAY Event output 1 contact output relay output Chapter 3 MOUNTING AND WIRING 10 LT Handling Precautions Use crimped terminal lugs which enable a reliable connection to terminals Use crimped terminal lugs that are compatible with M3 5 screws Limit the terminal screw tightening torque to 0 8N m Use a JIS C 3401 control cable CVV etc of maximum outer diameter of 2 2mm for wiring If waterproofing is required be sure to use the seal connector Yamatake model PA4 N2 PA4 N4 or equivalent product for reliable sealing When wiring to terminal 2 COM wire the analog output lead separately from the power lead Otherwise a voltage drop caused by the power current may influence the accuracy of the analog output Take care that event output 2 the open collector output does not exceed the output rating of this device When driving a relay be sure to use one with a built in coil surge absorption diode Failure to do so might cause faulty operation Mounting the ope
26. set above the display upper limit 2 If lower limit alarm1 has been selected in function setup C QC alarm detection will not operate when the flow rate is less than the lower limit of the measurement range even if the flow rate is below the lower limit alarm value Chapter 5 APPLICATION OPERATION Instantaneous flow rate upper limit alarm operation ON OFF Hysteresis f Instantaneous flow rate upper limit alarm value ee instantaneous flow rate Instantaneous flow rate lower limit alarm operation ON OFF Hysteresis f Instantaneous flow rate lower limit alarm value a __Instantancous flow rate 19 Chapter 6 MAINTENANCE AND TROUBLESHOOTING E Remedying trouble When trouble occurs refer to the following table Nothing is displayed s Make sure that the power supply voltage and polarity are correct e Check the connectors connecting the display to the sensor terminal section for disconnection or faulty contact Check the fuse to see if it has blown If so replace it For details on how to replace the fuse see the next item HM How to replace the fuse Err i is displayed alternately Check the connectors connecting the display to the sensor with the flow rate value terminal section for disconnection and faulty contact lf the connectors are free of abnormalities a probable cause is sensor error Contact your Yamatake agent as repair by Yamatake is necessary Erreg is displayed altern
27. t by key switch or automatic reset after the integration reset delay time when the integration event occurs Reset disabled Reset by key switch Flow rate alarm reset method selection Integrated flow rate reset method selection Total flow rate reset method selection Reference temperature selection The integrated flow rate is also reset when the total flow rate is reset 32 F 1 atmosphere 41 F 1 atmosphere 50 F 1 atmosphere 59 F 1 atmosphere 68 F 1 atmosphere 77 F 1 atmosphere The reference temperature of the flow rate output can be switched CMG152 252 CMG402 502 0 Disabled 1 Disabled 2 0 1 CF 1 pulse 3 1 CF 1 pulse Pulse rate selection CMG152 252 Do not set except 2 and 3 CMG402 502 Do not set except 3 0 Disabled 1 Disabled 2 Disabled 3 1 CF 1 pulse 6 Chapter 5 APPLICATION OPERATION 5 2 Parameter Setup R Setting operation Follow the procedure below to set parameters such as the flow rate alarm upper and lower limit values and alarm detection delay times 1 Press the key to display the instantaneous flow rate K The CFH indicator lights 2 Hold the La Jkey down for 3 seconds P Item A HI is displayed on the 7 segment display and the mode changes to parameter setup mode 3 Press the La or LY key to select the desired setup item and press the key K The current setting blinks on the segment display 4 Press the La
28. this key to fix and store settings to memory Also use it to display total flow rate or to switch to the function setup mode Sensor terminal section Houses the Micro Flow sensor chip amplifier and wiring terminal plates Inlet This is where the fluid to be measured flows in fe Flow path Fuse position The fluid to be measured flows through the flow rate Fuse M3 5 6 terminal screws Chapter 3 MOUNTING AND WIRING A WARNING When using combustible gas install the device upstream of the safety shut off valve If air somehow enters the piping and the sensor makes a Spark due to some cause like a lightning strike when an explosive mixture is present an explosion could occer inside the pipe On flanged models do not use the device or installed pipes as a footrest Doing so might damage the device or piping or cause a slip which might result in injury Flanged models are heavy Dropping them on your feet may cause injury O Q D Handling Precautions e When carrying the device hold it by the flow path section Holding it by the sensor terminal section may damage the device e This device is a precision instrument Do not drop it or subject it to shock Doing so might damage the device e Ifthe CMG model has a threaded pipe connection when connecting the piping fasten the flow inlet outlet section and then screw in the pipe side to connect the piping e When connecting a flanged de
29. tice Printed in Japan 1st Edition Issued in Apr 2007
30. urement range accuracy Accuracy 4 RD 1 digit 50 to 104 F 6 RD 1 digit 14 to 140 F Less than 14 5psi 22psi Pressure range Pressure resistance Allowable ambient temperature 14 to 140 F no freezing allowed gas temperature Storage ambient temperature 4 to 158 F no freezing allowed D Allowable ambient humidity Rated voltage Allowable voltage Power consumption Flow rate display method Instantaneous flow rate repeatability Response speed Sampling cycle 100ms 0 gt 100 step response 1 6s Instantaneous flow rate output Output range 0 to 400 of measurement range upper limit scalable 4 to 20mAdc Accuracy 0 5 FS Load resistance 300Q max 1a contact closes at event generation Contact rating 250Vac 30Vdc 5A resistance load Mechanical life 20 million cycles Electrical life 70 000 cycles Output configuration NPN open collector output Output rated 30V 50mA max When integrated pulse output is selected Pulse width 100ms 20 For measurement to 2 digits after the decimal point range Select either a 0 001 CF pulse 0 01 CF pulse or 0 1 CF pulse For measurement to 1 digit after the decimal point range Select either a 0 01 CF pulse 0 1 CF pulse or 1 CF pulse 1 2 2 pieces m s or less 10 to 60Hz for 2 hours each in X Y and Z directions 00m s or less 3 times each in X Y and Z directions Between terminal 5 and flow path and between terminal 6 and flow path 1500Vac for 1min or 1800Vac for 1s
31. vice first check that the piping is not tilted or off center before installing Failure to do so might cause leakage To prevent vibration of the device attach the pipe securely e Do not peel the protective seals from the display before use When performing work on the device tools may accidentally bump against the display and scratch it e When using the device outdoors mount it out of the direct sunlight and in a location where it is not splashed directly by rain e When mounting the device in locations where rust oil mist or dust and powder exists be sure to provide a strainer or filter upstream to prevent foreign matter from entering the device Foreign matter flowing into the device might result in faulty operation e When wiring the device take care not to tug on the display The internal connections might become damaged e Wire 4 20mA output and open collector output separately from the power line and power supply leads Do not wire these outputs in the same conduit as the power line and power supply leads Doing so might cause malfunction e Install a switch for shutting off the main power to the device within reach of the person operating the device e The common mode voltage between output and ground should be less than 33V RMS 46 7V at peak or 70Vdc excluding power supply and relay contact output Chapter 3 MOUNTING AND WIRING E Mounting Installation site Avoid mounting the CMG in locations charact
32. water enters the device it may cause measurement error or faulty operation When installing piping be sure to follow the procedures below to prevent foreign matter from entering the device Before installing the device be ASAE sure to flush the upstream and downstream piping thoroughly CMG to remove welding fume particulate and dust X O xe Upstream side of Downstream side of Be sure to wipe the inside Piping E piping of the pipe to be directly connected to this device After the above two operations are complete check to be sure that there is no welding fume particulate or dust and then install the device LU Handling Precautions Micro Flow lf foreign matter cannot be fully sensor chip eliminated by flushing or wiping or if the regular presence of foreign matter can be expected be sure to install a filter If dust oil or moisture adheres to the Micro Flow sensor chip measurement error or faulty operation may result Chapter 3 MOUNTING AND WIRING Mounting position Jh CAUTION S e Do not mount so that the display is facing down Doing so might cause error or other malfunction e This device can be used with the display facing up 90 LT Handling Precautions The length of the required straight pipe connection varies according to the model number For details see W Individual specifications page 23 Screw connection Coating sealant Coat with an appropriate amount of sea
33. you should find an error or omis sion please contact Yamatake Corporation In no event is Yamatake Corporation liable to anyone for any indirect special or consequential damages as a result of using this product 2007 Yamatake Corporation ALL RIGHTS RESERVED The pF CMG are trademark of Yamatake Corporation in Japan S SAFETY PRECAUTIONS E About Icons The safety precautions described in this manual are indicated by various icons Please be sure you read and understand the icons and their meanings described below before reading the rest of the manual Safety precautions are intended to ensure the safe and correct use of this prod uct to prevent injury to the operator and others and to prevent damage to proper ty Be sure to observe these safety precautions T WA 2 N i N G Warnings are indicated when mishandling this product might result in death or serious injury CAUTI O N Cautions are indicated when mishandling this product A N might result in minor injury to the user or only physical damage to the product E Examples Triangles warn the user of a possible danger that may be caused by wrongful operation or misuse of this product These icons graphically represent the actual danger The example on the left warns the user of the danger of electric shock White circles with a diagonal bar notify the user that specific actions are prohibited to prevent possible danger These icons graphically represent the
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