User Manual - Honeywell Analytics
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1. Honeywell Electrochemical Ammonia NH3 Leak Detector EC FX NH3 Instruction and Installation Manual Part No 1998M0872 Revision 1 June 2014 Honeywell Confidential amp Proprietary This work contains valuable confidential and proprietary information Disclosure use or reproduction outside of Honeywell Inc is prohibited except as authorized in writing This unpublished work is protected by the laws of the United States and other countries OPERATOR MANUAL Table of Contents Honeywell Elo SeE orDcEem m m m c 1 FIOO NC EUR KT 2 Noticesand Trademarks ccccc ccc cce a 3 OC NG M eeemiee 4 Sl o 4 TVS IONS rr 4 SyMDOl Definitions M 5 OUG UO e E user tae E E 6 Sii Be AA 7 SOS CMC AU OM AA RAON T o AAO ON RE m 9 A Locating the EC FX NH3 Sensor ccccceccec a 9 B WVU APAN 11 g ior 13 Cable Recommendation aa 14 ODOT AVION MT M e 16 A Start up PhO CC QUI kA 16 Simple Start Up TOS iussasuestenut enti erat nstiemuen umen uu deus Kan ug didus 16 B Pushbutton Operation and LED Indicators 16 11 B2 BT 17 REID MMMIM m2. During test green and yellow LED s are both continuous ON Continuous ON Continuous ON Exit Unit resumes normal mode automatically after about 20 seconds Green LED remains continuous ON and yellow LED is unlit Continuous ON LED is OFF Honeywell 20 OPERATOR MANUAL 4 20 mA Loop Test NOTE This test is recommended especially for PLC operations non Honeywell readout alarm unit NOTE This test will not automatically time out You must force the unit into normal operation e Full Scale Test This test will verify that the full scale output of the sensor is also achieved at the PLC Start Place meter leads on Test and Test Press button five times within a two or three second period of time The voltmeter should read approximately 220 mV equal to 22 0 mA output Verify full scale signal at PLC NOTE some PLCs limit input to 20 mA Blink sequence will be e Signal Fault Test This test will simulate one of many sensor fault conditions in which the transmitter will send 0 5 mA to the control panel To check for downscale fault verification press button for one second voltmeter should read approximately 5 mV equal to 0 5 mA output Verify downscale fault indication at PLC Blink sequence will be Continuous ON Medium blink PLC and monitoring equipment should indicate Fault at this extremely low signal output i e Honeywell Analytics recommends fault indication on any signal belo
3. Honeywell OPERATOR MANUAL If the sensor output is 0 5 mA Indicates a fault condition has occurred e Most common failed or disconnected sensor e Hardware failure pre amp If the sensor output is erratic Make sure that the unit is in clean ammonia free air The detector has been factory zeroed and spanned If the zero has become unstable and there are no interference gases the most likely problem is a depleted sensor or a new sensor with high gain left over from a previous sensor that was adjusted for aging If span calibration has not been performed with the new sensor turn span pot down see Figure 7 Note 1 on page 26 or counterclockwise 3 full turns This will decrease the sensitivity and reduce the zero calibration of the new sensor Calibration is required after this adjustment Electrical Interference This sensor has been designed to be highly resistant to EMI RFI using multiple stages of filtering and protection However in extreme environments some noise pickup can occur directly through the sensor Ensure that the bare shield wire of the instrument cable is connected to the terminal block marked SHLD at the sensor not touching the metal enclosure and properly grounded at the readout unit Interference Gases The EC FX NH3 is designed to be quite specific to ammonia However some other gases can affect the reading Phosphene methyl mercaptan and hydrogen can give a slight upscale indication Bromin
4. a 100 Ohm 1 4 Watt resister End of line resistor On the last sensor of the communication network a jumper must be installed must be installed as shown White From A terminal of Red From 24 VDC terminal of controller to A terminal of power supply next device Black From Ground terminal of power supply Black From B terminal of controller to B terminal of t devi next device Outside bare wrap From SHLD terminal of controller Honeywell 15 Operation A Honeywell OPERATOR MANUAL Start up Procedures Before applying power make a final check of all wiring for continuity shorts grounds etc It is usually best to disconnect external alarms and other equipment from the sensor until the initial start up procedures are completed SensorCheck is initiated each time the unit is powered up After power up allow 24 hours for the system to stabilize before testing the sensors As sensors are typically located a distance from the controller or PLC Honeywell Analytics recommends that the mA signal be calibrated with the control system Simple Start Up Test e One person exposes each sensor to a small amount of ammonia e The second person stays at the control unit to determine that each sensor when exposed to the gas fumes is connected to the proper input and responds causing appropriate alarm functions Pushbutton Operation and LED Indicators The EC FX NH3 has an internal pu
5. applications ammonia vapors from an NH leak will remain at a low elevation In these cases leak detection will take longer if the sensor is mounted at high elevation and the indicated concentration will not be representative of personnel exposure Higher mounting locations can also complicate access to the sensor for required calibration and maintenance For more information on sensor mounting locations for different leak scenarios please contact Honeywell Analytics General Mounting Considerations e Should be easily accessible for calibration and maintenance e Mount the sensor close to a potential leak source e f personnel protection is the primary application mount in the breathing zone e Protect sensor from water excessive humidity and wash down e ake air movement and ventilation patterns into account e f mounting sensor outdoors consider prevailing wind direction and proximity to the most likely source of leaks Protect the sensor from sun and rain as much as possible e Never mount the sensor in CA controlled atmosphere rooms because normal atmospheric level of oxygen is required for operation e For highly critical locations more than one sensor should be installed in each room e To prevent electrical interference keep sensor and wire runs away from mercury vapor lights variable speed drives and radio repeaters e Protect sensor from physical damage fork lifts etc e Do not mount the sensor over a door
6. in a refrigerated area OPERATOR MANUAL Figure 1 Mounting Dimensions 5 16 diameter Gas Sensor Sens JrCheck ANCAUTION Honeywell e Sensor must be mounted vertically e Never mount flat on a ceiling e Enter enclosure only through existing hole in bottom e Always make a drip loop in the conduit see Figure 1 Blast Freezers Never mount sensor above the coil The ideal location when possible is below the bottom of the coil Try to put in return air and protect the unit from being damaged by product loading and unloading Keep it away from warm moist air during defrost Usually four or five feet off the ground is the best location Penthouses e Multi Coil defrost one coil at a time In this case the best location is usually in the center of the penthouse four or five feet above the grate e Single Coil or when all coils defrost at the same time In this case high moisture conditions can occur and the sensor should be mounted one foot above the grate Engine Rooms The sensor should be mounted in a cool part of the room if possible Keep the sensor away from hot air exhausting from electric motors or other machinery Usually the best location is four or five feet above the floor in a location where the room exhaust fan will move air across the sensor from the potential leak source 10 OPERATOR MANUAL Ceiling Hung Evaporators When mounting Manning EC sensors near evaporators mount the sensor no hi
7. 17 iilo qgBzpmTM 17 Green ON Red Fast Blink Yellow Fast Blink 18 SensorCheck V sse mereri Ennan rrenan annerer 20 4 20 MA Loop LES NM 21 venere qp 22 Span Calibration Mode 1 mmm 22 Span CANDKANON NOR TUE 23 Span Signal Formula ccccccceececeeceececeeceaeeaeeseaeeseaeeaeeeeaneass 25 MODBUS Address Change 0 20070 7 7 aa 26 C TOU ICS NO ep ss 28 D Mainehang aaa AA ores LEE 31 EC Sensor Replacement Procedure ccc cece cece neces a 32 ReplacementParts asaan aaa ma cs Stu ets qc un ances o d 32 PIG NANANA Rem 33 Limited Wamanly sirenen E EEEE E ETE EE EEEa 33 E 0 UES 6 eee ee ete eee ee NG An eee 33 Warranty Limitation and Exclusion ccccccce a 33 Disclaimer of Unstated WarrantieS ccccccccece a 33 Limitation OF Liability P 34 1 Figures Honeywell Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure Figure 8 OPERATOR MANUAL Mounting Dimensions cccc eee ce aaa 10 4 20 mA Output Wiring Diagram esses 13 RS 485 Communication and Power Wiring Diagram 15 LED Blink Sequence 10 7 7 mH Hmmm 17 EC FX NH3 Detector Components e
8. 5 minutes If the mA output signal begins to drop quickly during the gassing phase 0 2 mA sec too much gassing time has passed and the process must be repeated ANCAUTION Cal gas flow must be in the direction of the arrow shown on the EC FX calibration adaptor Connect the regulator hose to the Inlet port side of the adaptor according to the air flow direction arrow molded into the plastic housing Inlet side 0 50 Exit port side NOTE The rise in 4 20 mA output signal will typically begin to slow down around 30 seconds after gas is applied as it approaches a peak value If the 4 20 mA signal peaks then begins to drop quickly adjust the span pot to 20 mA 0 5 mA Do not gas for more than 2 5 minutes If a signal peak is not reached within 2 minutes the sensor may need additional time to stabilize the adaptor may not be properly seated on the sensor with the O ring or there may be other issues specific to the site or the application NOTE In some cases the signal may begin to drop quickly after it peaks adjust the span pot until the output reaches 20 mA 0 5 mA even though the signal may begin to drop slowly NOTE For an EC FX NH3 detector with the LCD option once cal mode is initiated Apply gas will show on the display For best accuracy the span pot should be adjusted during the 2 minute timer Begin adjusting the span pot when the NH3 reading begins to slow down to 0 1mA sec 1mV sec This will likely take p
9. 909 0321 Seoul Korea Europe Middle Life Safety Distribution AG East Africa Hegnau Switzerland TAL US ae Honeywell 4 Symbol Definitions Honeywell OPERATOR MANUAL The following table lists those symbols used in this document to denote certain conditions Symbol e 5 ANCAUTION A Definition ATTENTION Identifies information that requires special consideration TIP Identifies advice or hints for the user often in terms of performing a task REFERENCE EXTERNAL Identifies an additional source of information outside of this bookset REFERENCE INTERNAL Identifies an additional source of information within this bookset Indicates a situation which if not avoided may result in equipment or work data on the system being damaged or lost or may result in the inability to properly operate the process CAUTION Indicates a potentially hazardous situation which if not avoided may result in minor or moderate injury It may also be used to alert against unsafe practices CAUTION Symbol on the equipment refers the user to the product manual for additional information The symbol appears next to required information in the manual Introduction Honeywell OPERATOR MANUAL This manual has been prepared to help in the use and installation of the EC FX NH3 Electrochemical Ammonia Sensor This manual will convey the operating principles of the sensor ensure proper installation and demonstra
10. A Output Wiring Diagram Note 1 Pushbutton Note 2 Mode Indicator LEDs Fake out resistor Remove factory installed 100 ohm fake out resistor e EC 19 E O L us VC White Connects to signal input of monitoring equipment Red From 24 VDC terminal Always respect of power supply minimum voltage requrements at device Black From Ground terminal of power supply Outside bare wrap From SHLD terminal of controller Electrical Power 24 VDC regulated 30 mA With an ATMOS equipped enclosure the current draw is 400 mA max AN Respect minimum voltage requirements Outputs ATTENTION The EC FX NH3 detector is shipped with a 100 ohm 1 4 watt resistor in the green four position terminal block across the Signal and Ground terminals see Figure 3 This resistor is needed to fake out the 4 20 mA loop if using the Modbus RTU output Only remove this resistor if using the 4 20 mA output e 4 20 mA Circuit board mounted sensor provides a linear 4 20 mA output Monitoring equipment may have a maximum input impedance of 700 ohms Honeywell 13 Honeywell OPERATOR MANUAL RS 485 MODBUS RTU communication protocol Cable Recommendation 4 20 mA output Use 18 3 shielded cable Belden 8770 or equivalent Length of cable to sensor should be no greater than 1 500 feet RS 485 output For communication cable use 24 AWG twisted pair shielded Belden 9841 or eq
11. ED will blink slowly for 2 min If the yellow LED doesn t turn on the button press timing was too erratic repeat the 8 button presses again until the yellow LED blinks slowly NOTE If at any time in step 4 all three LEDs simultaneously blink slowly the 4 20mA calibration was initiated accidently because the button presses were too slow or not consistent To exit this mode press the button for 1 second until the unit reverts back to run mode or when the LEDs stop blinking and the green LED is on solid Place the detector back in factory calibration mode and repeat step 4 5 After the yellow LED turns off check the mA output and ensure it is 4mA 0 05mA NOTE If the mA reading is not in range the 4 20mA output may need to be re calibrated It is not necessary to perform the internal zero procedure again unless the gain pot was adjusted more than 5 turns To re calibrate the mA loop output refer to page 21 AN Risk of electrical shock The LEDs will give visual indication of several sensor and transmitter conditions If the sensor output is 0 mA First verify 24 VDC at the sensor terminal block see Figure 8 Note 2 Second check voltage between Test and Test see Figure 8 Note 3 Voltage should be in the range of 40 mV to 200 mV corresponding to an actual current flow of 4 mA to 20 mA If this voltage is 0 mV the signal has no path to ground Check monitoring equipment connections and configuration 28
12. cale range at temperature of calibration Contact Honeywell Analytics for additional details Repeatability lt 10 of full scale Response Time T 30 seconds 90 full scale Sensor Viability Test An internal microprocessor determines the sensor s electrical viability every 24 hours SensorCheck Should the electrical viability test fail a 0 5 mA signal will indicate a fault A red LED on the circuit board will indicate if a sensor is degraded electrically depleted of electrolyte or disconnected 4 20 mA Loop Viability Test Internal monitoring of 4 20 mA output impedance Operating Humidity 5 100 RH condensing ATMOS equipped enviro adaptive technology option required for condensing conditions or refrigerated areas and all outdoor applications Operating Temperatures 50 F to 120 F 45 C to 50 C ATMOS equipped enviro adaptive technology option required for refrigerated areas or outdoors Honeywell OPERATOR MANUAL Sensor Pressure Limits Atmospheric 10 Power Source 24 VDC recommended 0 5 amp max 14 26 VDC acceptable Cable Recommendations 4 20 output 18 3 shielded cable Belden 8770 or equal cable runs lt 1 500 feet Modbus RTU RS 485 For communication cable use 24 AWG twisted pair shielded Belden 9841 or equal cable runs up to 2 000 feet Power Cable Recommendations For power cable use 14 AWG Belden 5100UE or equal cable runs up to 1 000 feet for each powe
13. d shield wire at the sensor to insulate it from the enclosure All penetrations into a refrigerated room should be sealed to prevent condensate from forming in the conduit and dripping into the sensor enclosure Make drip loops for cables going into sensor housings When heated enclosures are used follow the special mounting instructions on the enclosure This End Up Ba Mount sensor enclosures through the flange holes as shown in Figure 1 and always mount vertically 4 20 mA output Always use three conductor insulated stranded shielded copper cable 11 OPERATOR MANUAL RS 485 output Always use two conductor twisted pair insulated stranded shielded copper cable for the communication cable Use two conductor insulated stranded cable for sensor power With RS 485 the communication cabling of the network is daisy chained with multiple devices sensors relay modules etc communicating along the same pair of wires If used with the AirAlert 96d controller up to 32 devices can be wired in series per channel up to three channels e Refer to the controller manual for specific wiring details ACAUTION Honeywell When many sensors are connected to one set of power cables total current draw may exceed cable recommendations and or cause considerable line loss Contact Honeywell Analytics for recommendations on power cable sizing and additional power supplies 12 OPERATOR MANUAL Figure 2 4 20 m
14. ding the sensor For example in a 100ppm unit it is important to investigate small momentary signal changes that occur above the 4 6 mA 31 OPERATOR MANUAL threshold 5ppm on the EC FX output and below the first alarm level of 25 ppm 8 mA This could be an early warning that a small leak or breach in the NH3 system could have occurred in which a constant background of NH is present False alarms or brief activation of alarm 1 may also be an indicator of the presence of background or low level NH3 If it is discovered that the EC FX was exposed to a continuous leak of NH for more than 6 hours it is recommended to allow the sensor to stabilize in clean air for 48 hours and re calibrate EC Sensor Replacement Procedure e Remove the old EC sensor e Plugin new EC sensor making sure connector pins are positioned correctly Be sure ribbon cable is snug under plastic clip see Figure 8 Note 4 on page 28 e Allow sensor to stabilize until output reaches 4 mA 0 5 mA j e Perform manual SensorCheck using the procedure in the SensorCheck section e Follow the span calibration procedure on page 23 Honeywell Analytics recommendation is to check the calibration of all new sensors with certified calibration gas Follow the procedure in the Calibration section of this manual Replacement Parts For replacement parts contact Honeywell Analytics Be sure to have the model number and serial number of the unit Calibration pa
15. e ozone fluorine chlorine and nitrogen dioxide can give a slight down scale indication Contact Honeywell Analytics if any of these gases are present in your application 29 Honeywell Figure 8 Troubleshooting Note 5 Pushbutton Note 1 Span adjustment Note 4 Sensor cable plugs in here Verify that sensor is plugged in properly and cable is secured gt EC F9 NH3 B amm PX NHs w SENSOR PPM Honeywell OD GRY Test D HL 40 to 200 MVDC o L TA jpa JP1 B pE OOOO A B SHLD GND 424 SIG EC F9 E O L 40 200 mV Note 2 Power supply voltage Note 3 Sensor output OPERATOR MANUAL 30 OPERATOR MANUAL Maintenance For proper operation it is essential that the test and calibration schedule be followed Honeywell Analytics recommends the following maintenance schedule e Calibration should be performed with certified calibration gas every six months After exposure to a major leak stabilize the sensor at its operating temperature in a clean air environment Calibration kits are available from Honeywell Analytics See Replacement Parts on page 30 e Response test once between calibrations i e at three month intervals Expose sensor to ammonia water solution to verify proper sensor response and alarm functions Test more frequently in highly critical applications The response test is not required if multiple electro chemical sensors are installed in t
16. eplacing an aged or non responsive sensor the new sensor may cause an erratic or jumpy signal sometimes causing false alarms This is usually caused by excessive gain leftover from adjusting the span pot increasing the sensitivity for the old sensor Once the span calibration is performed on the new sensor the gain will be decreased to match the sensitivity of the new sensor reducing the jumpiness of the new sensor Honeywell 22 Honeywell OPERATOR MANUAL The EC FX NH3 detector is factory calibrated but it must also be calibrated at start up The sensor performs best when calibrated in the environment in which it will be used Using calibration gas other than the recommended full scale will affect the stated accuracy One pot on the preamp is used for Span calibration see Figure 4 Note 1 There is no zero pot as the pre amp is factory zeroed and should not require any further adjustment Calibration Kits are available from Honeywell Analytics See page 32 for kit part numbers and descriptions Calibration gas must be ordered separately refer to the Refrigeration Price Book for ranges and prices Span Calibration The unit is factory calibrated but must be spanned at initial installation Do not adjust the span pot without certified calibration gas For span calibration follow this procedure Start 1 2 3 4 With meter set to mVDC place leads on Test and Test Make sure signal is restin
17. ese 18 LED Sequence Indicator and Operation Summary 19 ECD MOGU 27 lijeleirggeue me 30 OPERATOR MANUAL Notices and Trademarks Honeywell 2014 by Honeywell International Inc While this information is presented in good faith and believed to be accurate Honeywell disclaims the implied warranties of merchantability and fitness for a particular purpose and makes no express warranties except as may be stated in its written agreement with and for its customers In no event is Honeywell liable to anyone for any indirect special or consequential damages The information and specifications in this document are subject to change without notice Manning is a registered trademark of Honeywell International Inc OPERATOR MANUAL Contact Us Online Honeywell Organization WWW Address URL Corporate www honeywell com Honeywell Analytics www honeywellanalytics com To return a product contact haservice canada honeywell com to obtain an RMA number For sales Information contact detectgas honeywell com Telephone Contact us by telephone at the numbers listed below Honeywell Analytics Inc 1 800 538 0363 Lincolnshire IL 1 847 955 8200 BW Technologies by Honeywell Americas Calgary Alberta Canada oe Oeste Honeywell Analytics Inc Brossard Quebec Canada 1 800 563 2967 Asia Pacific Honeywell Asia Pacific Inc 82 2 6
18. g at 4 0 mV x5 mV If the sensor is not outputting 4 0 mA see Troubleshooting on page 27 In some cases opening doors changes the temperature environment and ambient air flow to the sensor which impacts its stability during this procedure Place the unit in calibration mode by pressing the button for 3 seconds until the green LED flashes slowly or for units equipped with the LCD option initiate the calibration mode using the front panel push buttons NOTE After 10 minutes the unit will automatically revert to run mode NOTE Keep hands away from the sensor in order for a stable output to be achieved as moisture and air flow can affect stability Place the EC FX calibration adaptor EC FX CA on the sensor and ensure that it is fully seated and aligned Gas with full scale span gas NH mixed in air 0 3 L min until the 4 20 mA output signal rise 23 Honeywell OPERATOR MANUAL appears to slow down to around 0 1 mA sec If the output signal rises above 20 mA immediately begin adjusting the span pot counter clockwise to lower the mA output signal as the maximum output is 26 mA The rise in 4 20 mA output signal will begin to slow down around 10 to 30 seconds after gas is applied as it begins to approach a peak value Turn the span pot until output reaches 20 mA 40 5 mA 200 mV x 5 mV even though the signal may be slowly changing Remove the calibration adaptor and shut off the gas Do not gas the sensor for more than 2
19. gher than two feet below the top of the evaporator coil DO NOT mount in high air flow 1 200 feet minute maximum NEVER mount the sensor on evaporators as vibration can damage the sensor Other Locations When mounting Sensors in locations such as roof top air units duct work attic spaces makeup air intakes etc contact Honeywell Analytics for application assistance and recommendations B Wiring Figure 2 on page 13 presents 4 20 mA output wiring information for the EC F X NH sensor Figure 3 on page 15 presents RS 485 communication wiring information for the EC FX NH3 sensor Electrical wiring must comply with all applicable codes Plant equipment that may be involved and operating conditions should be discussed with local operating personnel to determine if any special needs should be taken into account Almost all start up problems are due to improper wiring or monitor configuration Please follow these guidelines carefully ACAUTION Honeywell Do not pull sensor wiring with AC power cables This will cause electrical interference Be sure there are no breaks or splices in sensor wiring runs If cable runs cannot be made without a splice all connections must be soldered Soldering should be done using a rosin flux to tie the connecting ends of sensor wires to ensure a positive and long lasting contact Ground the shield at the main control panel Connect the shield wire in the sensor terminal block labeled SHLD Tape all expose
20. he same room Log all tests and calibrations Sensor Life These electrochemical sensors are extremely reliable but several things can cause the sensor electrolyte to become depleted including time prolonged exposure to high temperatures exposure to varying concentrations of the target gas exposure to some VOCs exposure to high moisture for extended periods without proper sensor enclosure ACAUTION Honeywell Although SensorCheck tests the sensor s electrical viability every 24 hours itis absolutely essential that these units be exercised with a gas sample on aregular and timely basis Typical sensor life in a refrigerated area will be three to four years Typical life in a non refrigerated area will be two to three years Exposure to high levels of ammonia will shorten these times In addition to timely response checks a preventative maintenance program of periodic sensor replacement should be implemented When the sensor becomes depleted a replacement sensor can be obtained from Honeywell Analytics Simply unplug the ribbon cable from the pins labeled Sensor pull the old sensor from the spring clip discard the old sensor and replace it with a new one The sensor should be checked according to the following procedure after a five minute warm up period Note Typical Electrochemical sensor technology tends to exhibit a slight output shift downward when there is a small leak or a continuous NH3 background surroun
21. ice paid by the purchaser for the product and under no circumstances shall Honeywell Analytics be liable for special indirect or consequential damages The price stated for the product is a consideration limiting Honeywell Analytics liability No action regardless of form arising out of the transactions under this warranty may be brought by the purchaser more than one year after the cause of actions has occurred 34
22. lace before the 2 minute timer will expire Use a meter as described on page 21 for mA output readings during calibration not ppm levels as shown on the LCD display Once cal gas begins to flow a 2 minute reference timer will indicate when the sensor has reached the maximum allowed gassing time If the signal has not peaked or slowed down to 0 1 mA sec within this time the sensor may need additional time to stabilize or there may be other issues per note above After 2 minutes of gassing has occurred the display will indicate Spansnsr If the sensor is not ready to span or peaked in signal level when the Spansnsr is shown on the display the sensor may need additional time to stabilize or the adaptor may not be properly seated on the sensor If the sensor was able to span within the 2 minute time period this mode can be exited at any time 24 OPERATOR MANUAL by pressing the scroll then accept button 5 Remove the calibration adaptor and shut off the gas 6 Ensure that the output decreases to a stable 4 mA 0 2 mA this should take about 5 to 15 minutes NOTE If the output doesn t decline to 4mA 0 2 mA an internal offset procedure may be necessary This procedure can be found in the troubleshooting section of this manual inl see page 27 In addition if low level signals appear to be surfacing occasionally slightly above 4mA the internal offset setting may be the issue especially for differences in gain settings tha
23. n Slow Blink Calibration mode oolid ON Possible catastrophic failure on the circuit board The 4 20 mA signal will vary depending on the exact failure In the event of corrupted data calibration values and Modbus ID may be lost but the gas sensor and 4 20 mA output circuit would still be operational In the event of a CPU failure a 0 5 mA fault signal is output from the sensor All other functions and devices would be inoperable optional LCD network pushbuttons etc Contact Honeywell Analytics for technical support Slow Blink Near death possible dried up or disconnected sensor A 0 5 mA fault signal is output from the sensor during this error event A replacement sensor should be ordered at this time Medium Double Blink Possible weak sensor Sensor is nearing the end of its useful life Although the sensor may pass the span calibration or detect the presence of ammonia frequent attention and increased calibration checks are strongly recommended until the sensor is replaced Fast Blink Possible 4 20 mA loop failure or load resistance too high Check output impedance and ensure it is between 100 and 7000 referenced to ground In addition ensure power supply voltage is within specified operating range Yellow LED oolid ON During Sensor Check Medium Double Blink During 4 20 mA 0 5 mA low test Fast Blink During 4 20 mA 22 mA high test and during failed 22 mA high test 17 Honey
24. ncentrations if a claim by the Purchaser is made under this limited warranty Should such inspection indicate that the gas sensor has been depleted rather than failed prematurely this limited warranty shall not apply to the Product This limited warranty does not cover consumable items such as batteries or items subject to wear or periodic replacement including lamps fuses valves vanes sensor elements cartridges or filter elements Warranty Limitation and Exclusion Honeywell Analytics will have no further obligation under this limited warranty All warranty obligations of Honeywell Analytics are void if the Product has been subject to abuse misuse negligence or accident or if the Purchaser fails to perform any of the duties set forth in this limited warranty or if the Product has not been operated in accordance with instructions or if the Product serial number has been removed or altered Disclaimer of Unstated Warranties Honeywell The warranty printed above is the only warranty applicable to this purchase All other warranties express or implied including but not limited to the implied warranties of merchantability or fitness for a particular purpose are hereby disclaimed 33 OPERATOR MANUAL Limitation of Liability Honeywell It is understood and agreed that Honeywell Analytics liability whether in contract in tort under any warranty in negligence or otherwise shall not exceed the amount of the purchase pr
25. nge the Modbus address the correct value You will then be prompted to save the changes Press Accept to save and Scroll to abort You will then be returned to the MAIN MENU Use scroll button to navigate through the main menu To exit the menu scroll until the LCD displays Quit and press the Accept button This will return you to normal operating mode The LCD module can be unplugged at this time 26 Honeywell OPERATOR MANUAL After 5 minutes of inactivity the LCD returns to normal idle operating display Figure 7 LCD Module EC F9 NHs SENSOR Honeywell aag Module Plu aag Test 40 to 200 MVDC Test ECF9 NH3 JP1 0 PPM Scroll o Accept s Risk of electrical shock 27 Honeywell OPERATOR MANUAL Troubleshooting If low level signals appear to be surfacing occasionally slightly above 4mA the internal offset setting may be the issue especially for differences in gain settings that have occurred over time INTERNAL OFFSET PROCEDURE 1 Place the EC FX detector in Cal Mode 2 Unplug the sensor from the main board so that it is not electrically connected to the EC FX detector 3 Forunits equipped with an LCD option unplug the LCD ribbon cable from the main board the same board the sensor is connected to This allows the onboard button to function 4 Press the button 8 times quickly without pausing between presses the yellow L
26. omes factory programmed and does not require to be programmed at startup If it is determined that the Modbus address needs to be using the LCD module to view or change the Modbus address The LCD module has two push buttons Accept and Scroll which will be utilized for this procedure see Figure 7 NOTE To display the Modbus address press the Scroll button anytime during normal operating mode 1 2 mia 10 11 12 13 Plug in the LCD module to the LCD port on the PCB see Figure 7 on page 26 This module will power up immediately and will display the normal idle operating display Press the Accept button You will then be prompted for a password The password is MA Use the Scroll button to change the first letter to M Then press the Accept button You will then be prompted to change the second letter If it is already set to A press the Accept button If the correct password is entered you will be sent to the MAIN MENU In the MAIN MENU scroll until the Modbs D screen is displayed Press Accept to enter Modbus Address Change menu The current programmed Modbus address will be displayed if not programmed at the factory the default address is 001 If the Modbus address is correct keep pressing the Accept button until you are prompted to accept the current Modbus address You will then be returned to the MAIN MENU If the Modbus address is not correct using the Accept and Scroll buttons cha
27. r supply Larger power cable and or additional power supplies may be required for longer cable runs and or increased number of sensors Due to variables such as sensor current draw line loss and cable size contact Honeywell Analytics for help with power requirements Gas Sampling Diffusion method is standard Enclosure NEMA 1 gasketed 16 gauge steel standard or stainless steel models are available n NOTE The EC FX is for use in non classified areas only Weight 3 Ibs Dimensions 6 high x 4 wide x 3 5 deep Installation A Honeywell OPERATOR MANUAL Locating the EC FX NH3 Sensor Because each sensor is a point measurement it is very important that the sensor be located properly One of the most important considerations when installing EC n sensors is that they must be easily accessible for calibration and maintenance As a general rule locate sensors no closer than one foot from the ceiling If the primary application is personal protection representative concentration reading that an employee would be exposed to mount the sensor at a height in the breathing zone of the employees It would typically be about five feet off the ground which also allows easy access If the primary application is the fastest possible leak detection mount the sensor near the potential leak sources In the case of ammonia this is usually near the ceiling as ammonia vapor is lighter than air In certain refrigeration
28. rCheck SensorCheck is a microprocessor based technology that monitors and predicts the electrical viability of its electrochemical and infrared ammonia sensors by testing every 24 hours If the sensor becomes depleted or is disconnected SensorCheck sends an indication that can be detected bya gas detector or PLC The red LED will indicate if a sensor starts to degrade electrically causing marginal operation requiring frequent attention and increased calibration checks Should the electrical viability test fail the unit outputs a 0 5 mA signal to indicate this fault condition The SensorCheck electrical viability test is not however meant to replace adherence to the factory recommended calibration schedule n SensorCheck is an internal electrical test that is not capable of verifying physical aspects such as blockage of the sensor membrane by dirt flour grease water paint etc Physical blockage is rare but does occasionally happen especially in many harsh processing environments NOTE SensorCheck is not intended to measure or indicate the chemical viability of a sensor operating in high or continuous concentration of NH Although SensorCheck is performed automatically every 24 hours at any time a manual sensor check can be performed To perform a manual SensorCheck follow the procedure below Start Press button see Figure 4 Note 5 three times within two second time limit test takes about 15 seconds
29. rts EC FX CK ECFX cal kit 17 34L 300LPM reg EC FX CK1 ECFX cal kit 29L 300LPM reg EC FX CK2 ECFX cal kit 58 103L 300LPM reg EC FX CA Calibration Adaptor for EC FX Honeywell 32 OPERATOR MANUAL Limited Warranty Limited Warranty Exclusions Honeywell Analytics Inc warrants to the original purchaser and or ultimate customer Purchaser of the EC FX NH3 leak detector Product that if any part thereof proves to be defective in material or workmanship within two years of the date of shipment by Honeywell Analytics such defective part will be repaired or replaced free of charge at Honeywell Analytics discretion if shipped prepaid to Honeywell Analytics at 405 Barclay Blvd Lincolnshire IL 60069 in a package equal to or in the original container The Product will be returned freight prepaid and repaired or replaced if it is determined by Honeywell Analytics that the part failed due to defective materials or workmanship The repair or replacement of any such defective part shall be Honeywell Analytics sole and exclusive responsibility and liability under this limited warranty If gas sensors are part of the Product the gas sensor is covered by a two year limited warranty of the manufacturer The use of any non Honeywell parts in the Product voids the warranty If gas sensors are covered by this limited warranty the gas sensor is subject to inspection by Honeywell Analytics for extended exposure to excessive gas co
30. shbutton that is utilized for navigation of test functions and operating modes see Figure 5 Note 5 It also has a group of LEDs green red yellow see Figure 3 on page 15 that blink in specific sequences to indicate sensor operation modes A summary of sensor operation modes and corresponding LED blink sequences is shown in Figure 6 The pushbutton must be pressed the correct number of times and at the correct rate When a multi press sequence must be performed the button must be pressed rapidly and evenly lifting one s finger completely from the actuator for each consecutive press e For press and hold activations one s finger must always be applying a down pressure without disruption for the specified time in order to activate the desired mode e See complete details of each operation in other parts of the manual Bj The EC FX NH3 has been designed with three distinct test mode procedures that are triggered by the appropriate push button action These test modes include Manual SensorCheck Simple Zero Test and 4 20 mA Loop Check The fourth operation puts the unit into Calibration Mode to allow for testing with a certified calibration gas standard and to provide information for appropriate span adjustments if required 16 Honeywell OPERATOR MANUAL Figure 4 LED Blink Sequence SLOW BLINK MEDIUM BLINK CONTINUOUS ON FAST BLINK Green LED Solid ON all modes except Cal and 4 20 mA calibratio
31. t have occurred over time Press the button for 2 seconds to place the unit back into run mode The green LED will glow steadily or for units the LCD option exit from calibration mode using the front panel push buttons Exit Press and hold the button for one or two seconds The green left LED on continuously normal operation Qg Continuous ON NOTE The Span Calibration Mode will automatically time out after 10 minutes Span Signal Formula Normal span gas is full scale To achieve maximum accuracy full scale span gas must be used If the span gas is not full scale use this formula ASGC Signal mA aa x16 4 Where ASGC Available Span Gas Concentration SFSV Sensor Full Scale Concentration Value Example If 100 ppm ASGC gas is used to calibrate a 250 ppm SFSV sensor the signal would be as follows 100 ppm maia le meee so ppm X1644 10 4 mA 10 4 mA 104 mV from TEST to TEST If the correct output cannot be achieved a replacement sensor may be required Honeywell 25 OPERATOR MANUAL MODBUS Address Change n Honeywell NOTE To view or change the Modbus address the Manning LCD Module is required Contact Honeywell Analytics to obtain the module NOTE No two devices on the network can have the same address Each device needs to have a unique address Each device requires an address to communicate with the controller on the network The Modbus address normally c
32. te start up and routine maintenance procedures for the sensor individuals who have or will have the responsibility for using or n ATTENTION This manual must be carefully followed by all servicing the sensor Warranties made by Honeywell Analytics with respect to this equipment will be voided if the equipment is not used and serviced in accordance with the instructions in this manual If in doubt about a procedure please contact Honeywell Analytics before proceeding OPERATOR MANUAL System Description The EC F X NH3 leak detector is a three wire 4 20 mA transmitter sensor with RS 485 Modbus RTU communication It is designed for low level ammonia detection in industrial refrigeration cold storage environments and engine rooms The detector exhibits excellent durability and precision with negligible response to common interference gases and changes in relative humidity The default alarm level is 25 ppm for the 0 100 ppm sensor The unit exhibits extremely high reliability with no moving parts Monitoring equipment must be configured to indicate a fault if the signal is less than 1 5 mA All signals over 20 mA must be considered high gas concentrations Specifications Honeywell Method Electrochemical diffusion Ranges 0 100 PPM 0 200PPM 0 250PPM Output Isolated 4 20 mA 700 ohms max at 24 VDC Signal output reduces to 0 5 mA to indicate a fault condition RS 485 Protocol MODBUS RTU Accuracy 5 of full s
33. ual cable runs up to 2 000 feet Avoid T taps if possible Do not exceed 65 feet per T tap Do not exceed 130 feet total of all T taps per channel For power cable use 14 AWG Belden 5100UE or equal cable runs up to 1 000 feet for each power supply Larger power cable and or additional power supplies may be required for longer cable runs and or increased number of sensors Due to variables such as sensor current draw line loss and cable size contact Honeywell Analytics for help with power cable requirements Monitoring The EC FX NH3 ammonia detector may be monitored by the GM JR AirAlert 96d or other appropriately configured system For 4 20 output monitoring equipment must be configured to indicate a fault if the signal is below 1 5 mA All signals over 20 mA must be considered a high gas concentration not a fault condition NOTE for PLC applications The signal output load can range from 0 to 700 ohms where the maximum load resistor at a 24 VDC supply is 700 ohms and the maximum load resistor at a 10 VDC supply is 267 ohms Any load outside these values will indicate a fast flash on the red LED while in operation or this test mode during normal operation The error LED will blink fast at any time if the signal output cannot source the necessary current 14 OPERATOR MANUAL Figure 3 RS 485 Communication and Power Wiring Diagram x EC F9 NHs SENSOR Na Fake out resistor If 4 20 mA output is not used
34. w 1 5 mA Exit Press and hold button for one second Sensor will exit test and return to normal operation Q Continuous ON NOTE This test will not automatically time out You must force the unit into normal operation Honeywell 21 OPERATOR MANUAL Simple Zero Test Start With meter set to mVDC place leads on Test and Test see Figure 4 Note 3 Press and hold button for one second to enter the Calibration Mode Slow blink e Unplug the sensor from the pre amp e Observe the 4 20 mA signal which should be approximately 4 0 mA 40 mV on meter Range should be 39 4 to 40 6 mV If sensor output is not in this range contact Honeywell Analytics e Plug sensor back into pre amp Wait for sensor to stabilize at approximately 4 0 mA Exit Press and hold button for one second places unit in Normal Operation Mode Continuous ON extremely low signal output i e Honeywell Analytics PLC and monitoring equipment should indicate Fault at this recommends fault indication on any signal below 1 5 mA Exit Press and hold button for one second Sensor will exit test and return to normal operation Blink sequence will be Continuous ON Span Calibration Mode NOTE If using the Modbus RTU output with the AirAlert 96d controller while in calibration mode alarms A B and C will not be activated during calibration of the sensor NOTE When r
35. well OPERATOR MANUAL Green ON Red Fast Blink Yellow Fast Blink 4 20 mA loop test failed the 22 mA high extremity Check output impedance and ensure it is between 100 and 7000 referenced to ground In addition ensure power supply voltage is within specified operating range Figure 5 EC FX NH3 Detector Components Note 5 Pushbutton Note 4 Sensor cable plugs in here Verify that sensor is plugged in properly and cable is secured Note 1 Span adjustment b EC F9 NHs SENSOR Honeywell Note 2 LEDs Test i JP1 Od DO OD QD A B SHLD GND 24 SIG LCD module connector 40 200 mV mVDC Risk of electrical shock Note 2 Sensor output 18 OPERATOR MANUAL Figure 6 LED Sequence Indicator and Operation Summary Mod Green LED Left Red LED Center Yellow LED Right m Normal Run Mode During Span V Calibration Mode During Simple Zero Test Y Manual SensorCheck Failed or Disconnected Sensor Hardware 2 failure During 4 20 mA Loop Test 22 mA high Failed Loop Test 22 mA high During 4 20 mA LoopTest 0 5 mA low Failed Signal Output NOTES 1 SensorCheck automatically every 24 hours Manual test can be initiated 2 Unit will output 0 5 mA 3 Exits mode after 10 minutes or if pushbutton is pressed for one second 4 Occurs due to wiring problem or incorrect load value Initiated by button press Honeywell 19 OPERATOR MANUAL Senso
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