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Honeywell EC-FX-NH3, Instruction And Installation Manual, Page: 14 / 36

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Honeywell EC-FX-NH3 Instruction And Installation Manual Download Page 14

 

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

TM

 96d controller, up to 32 devices can be 

wired in series per channel (up to three channels). 

 

Refer to the controller manual for specific wiring details.

 

 

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 

Summary of Contents for EC-FX-NH3

Page 1: ...ision 1 June 2014 Honeywell Confidential 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information Disclosure use or reproduction outside of Honeywell Inc is prohibited except as authorized in writing This unpublished work is protected by the laws of the United States and other countries ...

Page 2: ......

Page 3: ...t Up Test 16 B Pushbutton Operation and LED Indicators 16 Green LED 17 Red LED 17 Yellow LED 17 Green ON Red Fast Blink Yellow Fast Blink 18 SensorCheck TM 20 4 20 mA Loop Test 21 Simple Zero Test 22 Span Calibration Mode 22 Span Calibration 23 Span Signal Formula 25 MODBUS Address Change 26 C Troubleshooting 28 D Maintenance 31 EC Sensor Replacement Procedure 32 ReplacementParts 32 Limited Warran...

Page 4: ...0 mA Output Wiring Diagram 13 Figure 3 RS 485 Communication and Power Wiring Diagram 15 Figure 4 LED Blink Sequence 17 Figure 5 EC FX NH3 Detector Components 18 Figure 6 LED Sequence Indicator and Operation Summary 19 Figure 7 LCD Module 27 Figure 8 Troubleshooting 30 2 ...

Page 5: ...hantability 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 I...

Page 6: ...s honeywell com Telephone Contact us by telephone at the numbers listed below Organization Phone Number Americas Honeywell Analytics Inc Lincolnshire IL 1 800 538 0363 1 847 955 8200 BW Technologies by Honeywell Calgary Alberta Canada 1 800 663 4164 Honeywell Analytics Inc Brossard Quebec Canada 1 800 563 2967 Asia Pacific Honeywell Asia Pacific Inc Seoul Korea 82 2 6909 0321 Europe Middle East Af...

Page 7: ...RENCE 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 aler...

Page 8: ...p and routine maintenance procedures for the sensor ATTENTION This manual must be carefully followed by all individuals who have or will have the responsibility for using or 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 procedu...

Page 9: ...ax at 24 VDC Signal output reduces to 0 5 mA to indicate a fault condition RS 485 Protocol MODBUS RTU Accuracy 5 of full scale range at temperature of calibration Contact Honeywell Analytics for additional details Repeatability 10 of full scale Response Time T90 30 seconds 90 full scale Sensor Viability Test An internal microprocessor determines the sensor s electrical viability every 24 hours Sen...

Page 10: ...le 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 requirements Gas Sampling Diffusion method is standard Enclosure NEMA ...

Page 11: ... 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 Should be easily accessible for calibration and maintenance Mount the se...

Page 12: ...e feet off the ground is the best location Penthouses 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 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 mounte...

Page 13: ...up problems are due to improper wiring or monitor configuration Please follow these guidelines carefully 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 en...

Page 14: ...nsors relay modules etc communicating along the same pair of wires If used with the AirAlert TM 96d controller up to 32 devices can be wired in series per channel up to three channels Refer to the controller manual for specific wiring details 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 Ho...

Page 15: ...3 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 4 20 mA Circuit board mounted sensor provides a linear 4 20 mA output Monitoring equipment may have a maximum inp...

Page 16: ... 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 AirAlertTM 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 h...

Page 17: ...OPERATOR MANUAL Figure 3 RS 485 Communication and Power Wiring Diagram 15 ...

Page 18: ...ctions 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 pe...

Page 19: ... 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 c...

Page 20: ...link 4 20 mA loop test failed the 22 mA high extremity Check output impedance and ensure it is between 10Ω and 700Ω referenced to ground In addition ensure power supply voltage is within specified operating range Figure 5 EC FX NH3 Detector Components 18 ...

Page 21: ... Failed or Disconnected Sensor 2 Hardware failure 2 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 4 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 ...

Page 22: ...ensorCheck TM 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 TM is not intended to measure or indicate the chemical viability of a sensor operating in high or continuou...

Page 23: ...k sequence will be Continuous ON Fast blink 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 Med...

Page 24: ...ow signal output i e Honeywell Analytics 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 AirAlertTM 96d controller while in calibration mode alarms A B and C will not be activated during calibra...

Page 25: ...ration gas For span calibration follow this procedure Start 1 With meter set to mVDC place leads on Test and Test 2 Make sure signal is resting at 4 0 mV 5 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 3 Place the unit in ca...

Page 26: ... 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 op...

Page 27: ... 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 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 accura...

Page 28: ...ompted for a password The password is MA 5 Use the Scroll button to change the first letter to M Then press the Accept button 6 You will then be prompted to change the second letter If it is already set to A press the Accept button 7 If the correct password is entered you will be sent to the MAIN MENU 8 In the MAIN MENU scroll until the ModbsID screen is displayed 9 Press Accept to enter Modbus Ad...

Page 29: ...OPERATOR MANUAL After 5 minutes of inactivity the LCD returns to normal idle operating display Figure 7 LCD Module 27 ...

Page 30: ...nitiated 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 readin...

Page 31: ...e 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 b...

Page 32: ...OPERATOR MANUAL Figure 8 Troubleshooting 30 ...

Page 33: ...xposure to some VOCs exposure to high moisture for extended periods without proper sensor enclosure Although SensorCheck TM tests the sensor s electrical viability every 24 hours it is absolutely essential that these units be exercised with a gas sample on a regular and timely basis Typical sensor life in a refrigerated area will be three to four years Typical life in a non refrigerated area will ...

Page 34: ...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 Allow sensor to stabilize until output reaches 4 mA 0 5 mA Perform manual SensorCheck TM using the procedure in the SensorCheck TM section Follow the span calibration procedure on page 23 Honeywell Analytics recommendation is to check the calibration of a...

Page 35: ...ed by this limited warranty the gas sensor is subject to inspection by Honeywell Analytics for extended exposure to excessive gas concentrations 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 ...

Page 36: ...l 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 Yor Yorgos Ambiental gos Ambiental Matriz Matriz SP SP Rua Rua Antônio Antônio de de B Barros arros 2080 2080 Vi Vila Carrão la Carrão São São Paulo Paulo SP SP CEP CEP 03408 02 Tel 03408 02 Tel 11 2507 ...

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