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Honeywell AC-250NXS, Installation And User Manual

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AC-250NXS INSTALLATION AND USER MANUAL 

                                                                                

 

 

Rev. 1.1 |  

April 2022

 

 

Summary of Contents for AC-250NXS

Page 1: ...AC 250NXS INSTALLATION AND USER MANUAL Rev 1 1 April 2022 ...

Page 2: ...ation is presented in good faith and believed to be accurate Honeywell disclaims the implied warranties of merchantability and fitness for a purpose and makes no express warranties except as may be stated in its written agreement with and for its customer In no event is Honeywell liable to anyone for any direct special or consequential damages The information and specifications in this document ar...

Page 3: ...ry 13 Electrostatic discharge 13 FCC Compliance Statements 14 AC 250NXS GAS METER SPECIFICATIONS 15 CHECKING THE USAGE IN POTENTIALLY EXPLOSIVE ATMOSPHERES 17 Marking 17 Use as follows 17 AUTONOMOUS VALVE SHUTOFF CONFIGURATION 18 ALERT NOTIFICATION CONFIGURATION 19 INTEGRATED CAT M1 COMMUNICATIONS MODULE 20 Install the AC 250NXS Gas Meter 21 AC 250NXS GAS METER LCD OPERATION 24 Operating the elect...

Page 4: ... 39 Command scenario 40 Valve error 41 Valve Closure Operation 42 Flow test 43 SECURITY 45 Privacy 45 Key management 45 Network recommendations 46 Meter firmware upgrades 46 Server upgrade 46 Safe disposal of consumption data 46 Software licenses 46 Report security vulnerability 46 ...

Page 5: ... MDC Meter Data Collection MDM Meter Data Management OTA Over the Air OEM Original equipment manufacturer ESD Electrostatic Discharge FCC Federal Communications Commission CFH Cubic feet per hour PCB Printed Curcuit Board HES Head End system AMI Advanced Metering Infrastructure ...

Page 6: ...story Revision Supported Release Date Description 1 1 R200 April 2022 Initial release Intended audience This guide is primarily intended for Honeywell field personnel who install and configure the product Related documents The following list identifies publications that may contain information relevant to the information in this document ...

Page 7: ...accurate easy to install and fits in tighter spaces such as meter manifolds in apartment complexes More than 100 million meters based on this measurement cartridge design have been sold worldwide The AC 250NXS is available with built in temperature conversions for accurate measurements An integrated CAT M1 cellular communication module enables automatic meter readings to be updated to utilities mu...

Page 8: ...ommunication Highly secured with end to end industry standard encryption and authentication methods Honeywell SNAP prover integration with electronic accuracy adjustment Safety features Intrinsically safe class I division 1 group D T1 Reliable bubble tight valve Autonomous shut off based on high pressure high temperature and tamper Safety alert to Head End system during valve closure opening High ...

Page 9: ...on high pressure temperature flow Reverse flow events 3 Protected against unintentional opening of the valve 4 Re enable gas only once the customer s gas appliances are closed 5 No energy consumed when the valve is closed 6 Low energy consumption during activation 7 Detection of open and closed positions 8 Configurable valve autonomous shut off thresholds during High gas Pressure or Temperature ...

Page 10: ...ble b The LCD provides a visual display of consumption alarm messages and status information 2 An internal shutoff valve 3 Diaphragm measuring unit 4 Integrated metrological unit with optical pickup 5 Die cast aluminum case 6 Steel bosses S No Description S No Description 1 Serial number bar code Format code 128 ISO IEC 15417 5 Left navigation button 2 Meter serial number 6 Optical probe connectio...

Page 11: ...11 S No Description S No Description 3 Display 7 Battery cover seal 4 Select button 8 Battery cover ...

Page 12: ...ronments A distance of 20 cm 7 8 inches must be maintained between the device and the user s body and the body of a nearby person The meter must not be installed or operated in close proximity with any other antenna or transmitter Safety instructions Information that is relevant for safety is indicated in the instructions as follows DANGER Indicates potentially fatal situations WARNING Indicates p...

Page 13: ...ttery The device contains non rechargeable Lithium batteries that are potentially hazardous and can present a serious FIRE HAZARD if damaged defective or improperly used WARNING Do not recharge the batteries as they are non rechargeable The battery must be disposed carefully according to applicable rules and regulations after they are used as seeping into ground water may put human health at risk ...

Page 14: ...rference to radio communications However there is no guarantee that interference will not occur in a particular installation If this equipment does cause harmful interference to radio or television reception the user is encouraged to try to correct the interference by one or more of the following measures 1 Reorient or relocate the receiving antenna 2 Increase the separation between the equipment ...

Page 15: ...ayed units CCF 100 x cubic foot LCD resolution 0000 001 CCF 00000 001 CCF 000000 001 CCF Valve Gas tightness meets or exceeds ASME B16 33 section 4 2 leakage rate at max 2PSIG diff pressure Case Die cast aluminum case Weight 12 lbs Gas type Natural gas EN437 Type H E L Reference gases G20 G21 G23 G25 G26 G2 Connection sizes 10 LT 20 LT 30 LT 1 PITTS 1 Sprague Operating temperature ratings Measurem...

Page 16: ...tery is replaceable Battery life 15 years for both metrology and index communication under recommended operating conditions Standards Designed in compliance with ANSI B109 1 Regulatory This device complies with Part 15 of the FCC rules FCC ID 2AAGMGM02S Component materials Single coat polyester ...

Page 17: ...quipment failure Group D IIA Explosion group for gases acetone ammonia benzene butane ethanol gasoline hexane methane methanol methane naphtha natural gas propane and toluene T1 maximal surface temperature 842 F Ta Ambient temperature Zone 0 The device may be used in a place in which an explosive atmosphere is continually present Ex Explosion protection AEx Explosion protection approved to US stan...

Page 18: ...3 High Reverse gas flow is detected exceeding the configured threshold value for a set duration of time The high Reverse flow threshold can be configured by utilities 4 Tamper event is detected unauthorized opening of service cover or unauthorized battery removal The autonomous shutoff can be disabled for a specific event by the operating utility For example utilities can disable the autonomous sh...

Page 19: ...and returned to normal 2 High gas temperature is detected and returned to normal 3 High Reverse gas flow rate is detected and returned to normal 4 Tamper event is detected 5 Reverse Flow detected and returned to normal 6 Valve Opened or Valve Closed Most of the above notifications can be disabled by the utilities as they can configure the device to report only notifications which are of prime inte...

Page 20: ...tely sends an alert to the Head End System within 15 seconds of detecting the abnormal condition The device is incorporated with the ALWAYS ON feature which enables it to receive requests from the Head End System Apart from the device initiated communications the Head End System can also trigger data communications whenever necessary This enables the remote valve shut off to be serviced immediatel...

Page 21: ... Alkali in concrete as well as other corrosive elements in soil can cause premature corrosion of the meter body 6 Inlet and outlet pipe connections should be parallel The height difference between the housing connections should be no more than 7 Hand tightens the inlet swivel cap Open the manual inlet valve slightly to pressure the system to purge the air inside the meter through the outlet Please...

Page 22: ...nd check inside customer s premise for leaks Repeat steps after the leak is repaired 9 10 11 and 12 If no pulses N or volume accumulated continue with standard re lighting procedures per your utility practices Make sure that the Soap sniff meter connection has no leaks Last Step Activate cellular communication Push the left arrow button on the meter to turn on the display press the left arrow butt...

Page 23: ... ignition capable level of electrostatic discharge Therefore the equipment shall not be installed in a location where the external conditions are conducive to the build up of electrostatic charge on such surfaces This is particularly important if the equipment is installed in a Zone 0 Division 1 location In addition the device shall only be cleaned with a damp cloth and shall not be stored or oper...

Page 24: ...s are only displayed when a valve is integrated with the gas meter AC 250NXS is equipped with an integrated valve User keys selection key and symbols Navigate through the menu with the user keys and the selection key Icon Description Navigate key Navigate to the left on each level using the user key Select key Briefly pressing the selection key selects a sub menu Holding the selection key pressed ...

Page 25: ...losed Valve gas flow released Valve gas error Index Time Sync Failure This icon appears if time sync of index fails Metrology Logbook Full This icon appears if metrology logbook is full or 90 of if there is a memory error Low battery This symbol is only displayed when battery power is low Temperature alert This icon appears when current temperature crosses max limit of Temperature Adjust OBIS Pres...

Page 26: ...s the low warning threshold of the VEM differential pressure threshold Differential pressure below normal This appears when current differential pressures cross the low warning of the VEM differential pressure threshold Temperature above threshold This appears when current temperature crosses the high close threshold of the VEM temperature threshold Temperature above normal This appears when curre...

Page 27: ...ears when the current flow crosses the low close threshold of the VEM Flow threshold Flow below normal This appears when the current flow crosses the low warning threshold of the VEM Flow threshold Capacity of the battery in use is above 90 Capacity of the battery in use is 60 to 90 Capacity of the battery in use is 40 to 60 Capacity of the battery in use is 20 to 40 Capacity of the battery in use...

Page 28: ...onds If a screen is active from the Service menu the display will automatically change back to the main screen when no user key has been pressed for 5 minutes and switches off after 60 seconds Valve screens are not a part of the Main menu or Service menu These screens can only be accessed via giving commands to open closed the valve Time out for valve screens are different depending upon the user ...

Page 29: ...ew The display can differ depending on the parameterization or communications unit The Main menu has 5 different screens and some of the screens contain sub screens the sub screens are entered using the select button ...

Page 30: ...nance state See for information on configuring Integer points On the Cumulative Volume screen press the left button to navigate to Cat M1 screen The Cat M1 screen has 4 sub screens navigate to sub screens using the select button The AC 250NXS supports Cat M1 cellular communication The first screen shows the cellular connection status A manual remote call can be invoked by holding the select button...

Page 31: ...d PTW network provided cycle time network provided PTW Requested values of cycle time PTW are the values that we are asking via command whereas network provided values are the values that are being sent in response of the command given The default values of requested cycle time PTW are 81 92 2 56 seconds respectively Network provided values are updated once the eDRX connection is established On th...

Page 32: ...ptions Three symbols can be seen on a single view To view more symbols if active press the left button on this sub screen The timeout for this screen is 5 minutes On the Current Alarms Events Info screen press the left button to navigate to Date Time screen This screen displays the actual date and time The format is given below Date GG MM AAAA Time HH MM SS The main title Date and Time UTC 1 speci...

Page 33: ...ication bootloader Application communication firmware Metrology Bootloader The bootloader programs that loads and starts the boot time tasks and processes of an operating system This also includes calibration parameters display screens The meter also includes Metrology events and application Communication events that can be accessed by the user Using the Select key a user can navigate to the Appli...

Page 34: ...34 ...

Page 35: ...ure screen indicates the current gas temperature tg Max and Min gas temperature measurement range base temperature and specific temperature 59o F used for temperature compensation which are modifiable by the end user ...

Page 36: ...arameters Vcc is the Voltage provided to the Microcontroller of the index but not the main replacement battery voltage V min is the minimum voltage threshold which is used for checking the main replacement battery voltage for low voltage case Vhlc is the voltage of the HLC which is used for powering internal hardware One of these indicates the states of the battery Tampering if the device detects ...

Page 37: ...ns Number of IR Opto communications Number of Valve Open and Close operations Number of times Display was On from Off state Number of times meter went to High Response Mode current counters NOTE THIS DOCUMENT DOES NOT DESCRIBE CURRENTLY ABOUT PERIPHERALS CYCLIC TESTS AND LCD TEST SCREENS ...

Page 38: ...s 4 3 5 3 or 6 3 Users can configure Integer points using OBIS IC 9128 and Decimal points are fixed with 3 decimals Different types of configured Integer points are shown below 4 Integer points and 3 Decimal points display 5 Integer points and 3 Decimal points display 6 Integer points and 3 Decimal points display ...

Page 39: ... pressing the select button the valve opens and then the valve leakage test starts During the test a timer screen is displayed which shows the maximum and minimum times for completion of the leakage test After the test is completed a gas flow check successful message is displayed In case any gas flow is detected during the gas flow check a gas flow check failed error message will be displayed The ...

Page 40: ...40 Command scenario 1 2 3 4 ...

Page 41: ... Environmental error can occur if there are any faults in the system that are connected to pressure temperature flow or differential pressure System error Whereas System error occurs when the voltage is less than 3 1V or in case of HW issues ...

Page 42: ...lve closed successfully message is displayed on the screen An error message will be displayed in a scenario when there are issues with closing the valve instead of a success message Once the valve is open successfully click the Select button to enter the main screen where a user can see the current valve position indicated as OFF The meter displays Valve is in Closed State if the valve is already ...

Page 43: ...tions will be displayed on the screen The Flow Test Duration screen displays the possible durations for the flow test The value can be changed by pressing the left button on the screen Once the required value appears on the screen the test can be started by pressing the select button Once the test starts the screen changes to Flow Test Running screen ...

Page 44: ...een If the select button is pressed here we can start the flow test again After the flow test is competed successfully the UI changes to Flow Test Competed screen T_e will be the time given by the user or 120 seconds if the test starts from the service screen menu T_r will be 0 N V as per the pulses and volume values that were provided If the select button is pressed here the UI will change to the...

Page 45: ...pports management and installer roles a management client can change both management and installer keys and an installer can change just the installer key The meter keys must be periodically changed Honeywell NetSense provides a mechanism for periodic key replacement to all meters Please refer to Honeywell NetSense documentation for further details The key management and change must happen in a se...

Page 46: ...sizes for secure management of the database software and key storage 1 Minimum RSA Length 3072 Bit 2 Minimum ECC Key Size 256 Bit 3 Minimum AES Key Size 128 Bit 4 Minimum Hash Algorithm SHA 256 Safe disposal of consumption data All the PCBs which may contain sensitive software and or personal data must be disposed of using a method which make sures that the data cannot be restored e g shredding by...

Page 47: ...instructions at https www honeywell com en us product security under the Vulnerability Reporting section To view information on current malware threats impacting the Industrial Control Industry please visit https www honeywellprocess com en US support pages default aspx or contact the manufacturer ...

Page 48: ...ywell Process Solutions 1250 W Sam Houston Pkwy S 150 Houston TX 77042 Honeywell House Skimped Hill Lane Bracknell Berkshire RG12 1EB Building 1 555 Huanke Road Zhangjiang Hi Tech Park Pudong New Area Shanghai China 201203 https process honeywell com ...

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