EC-FX-NH3 Calibration Procedure
Contents
1. 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 try your best to adjust the span pot until the output reaches 20mA 0 5mA even though the signal may begin to drop 3 Remove the calibration adaptor and shut off the gas 4 Unplug the sensor electrically from the EC F2 and ensure the mA output is 4mA 0 03mA If the output is out of this range adjust the Zero pot again until mA output is 4mA 0 02mA then plug the EC FX sensor back into the EC F2 5 Ensure output decays to a stable 4mA 0 2mA this should take about 5 to 15 min 6 Unit is now ready for operation Technical Note Page 7 of 7 Part Number 1998M0800 ECFX CALIBRATION PROCEDURE Revision 012. 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 try your best to adjust the span pot until the output reaches 20mA 0 5mA even though the signal may begin to drop 8 Remove the calibration adaptor and shut off the gas 9 Unplug the sensor electrically from the EC F2 and ensure the mA output is 4mA 0 03mA If the output is out of this range adjust the Zero pot again until mA output is 4mA 0 02mA then plug the EC FX Sensor back into the EC F2 10 Ensure output decays to a stable 4mA 0 2mA this should take about 5 to 15 min 11 Unit is now ready for operation Technical Note Page 4 of 7 Part Number 1998M0800 ECFX CALIBRATION PROCEDURE Revision 01 Honeywell Technical Note Field Calibration Procedure for an existing EC FX NH Sensor The following procedure is designed for calibration of an EC FX or an EC F9 F2 to 100ppm 200ppm or 250ppm ammonia NH3 This procedure assumes familiarity with calibration of an EC F9 F2 For additional detail refer to the appropriate user manual FOR AN EC FX EC F9 NH3 CALIBRATION 1 Place the unit in calibration mode by pressing the button for 3 seconds unt
3. slowed down to 0 1 mA sec within this time the sensor may be defective as indicated in the above notes 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 by pressing the scroll then accept button 4 Remove the calibration adaptor and shut off the gas 5 Ensure the output decays to a stable 4mA 0 2mA this should take about 5 to 15 minutes 6 Press the button for 2 seconds to place the unit back into run mode Green LED on solid or for units the LCD option exit out of calibration mode using the front panel push buttons 7 Unit is now ready for operation FOR AN EC F2 NH3 INSTALLATION 1 Ensure the output is a stable 4mA 0 15mA _ It may take about 5 min to ensure the signal stabilizes as in some cases opening door changes the temperature environment and ambient air flow to the sensor Note If the output doesn t stabilize in this range unplug the sensor electrically from the EC F2 and adjust the Zero pot until mA output is 4mA 0 02mA then plug the EC FX sensor back into the EC F2 Note Keep hands away from the sensor in order for a stable output to be achi
4. Honeywell Technical Note May 12 2014 Rev 1 EC FX NH Sensor Installation and Calibration Procedure for replacement of M 507975 Sensor in an EC F9 F2 This is a one time procedure for installing a new EC FX NH3 sensor into an EC F9 F2 that was originally setup with an M 507975 ammonia sensor for 100ppm 200ppm or 250ppm NH3 Note The EC FX sensor will be more sensitive than the M 507975 therefore the gain pot must be lowered near where the span would be 100 250ppm NH3 for a 20mA output otherwise the zero will not be near 4mA This would cause an initial zero to look too high when the sensor is installed causing extreme settling times and false alarms A one time zeroing step is necessary when an M 507975 sensor is replaced with an EC FX for an initial one time adjustment before a final calibration can be performed FOR AN EC F9 NH3 INSTALLATION 1 2 Remove the old M 507975 Sensor Place the unit in factory calibration mode by pressing the button for 10 seconds or until the green LED flashes fast or for units equipped with an LCD option unplug the LCD ribbon cable from the main board same board the sensor is connected to This allows functionality of the onboard button Adjust the Span pot down around 5 to 30 turns counter clockwise until a faint clicking sound occurs This should be the lowest gain setting Then turn the span pot 4 full turns up clockwise Ensure there is NOT a sensor electri
5. cally connected to the EC F9 Press the button 8 times quickly without pausing between presses the yellow LED should blink slowly for 2 min If the yellow LED doesn t turn on the button press timing was too erratic try the 8 time button press again until the yellow LED blinks slowly Note If at any time in step 6 all three LEDs slowly blink simultaneously then the 4 20mA calibration was initiated accidently because the button presses were to slow or not consistent To exit this mode press the button for 1s until the unit reverts back to run mode or when the LEDs stop blinking and the Green LED is on solid The unit will have to be placed back in factory calibration mode and step 8 will have to be repeated Technical Note Page 1 of 7 Part Number 1998M0800 ECFX CALIBRATION PROCEDURE Revision 01 Honeywell Technical Note 7 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 To re calibrate the mA loop output Press button 5 times All 3 LED s should blink slowly simultaneously and in sync Adjust the 4 20 mA output to 4 0 mA 02 mA This is accomplished by double pressing the button quickly in 5 second intervals If the double press interval is too fast the output will not change This delay allows the output to stabilize before a disposition is reached for each button press The 4 20 mA output wil
6. ess will need to be repeated Critical Note Make sure calibration gas flow is in the direction of the arrow shown on the EC FX calibration adaptor Ensure the tubing from the regulator is connected to the Inlet port side of the EC FX adaptor according to the air flow direction arrow molded into the plastic housing Inlet side o o 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 Technical Note Page 5 of 7 Part Number 1998M0800 ECFX CALIBRATION PROCEDURE Revision 01 Honeywell Technical Note 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 try your best to adjust the span pot until the output reaches 20mA 0 5mA even though the signal may begin to drop Note For an EC FX sensor with the LCD option once cal mode is initiated Apply gas will show on the 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
7. eved as moisture and air flow can affect stability Technical Note Page 6 of 7 Part Number 1998M0800 ECFX CALIBRATION PROCEDURE Revision 01 Honeywell Technical Note 2 Place the EC FX calibration adaptor on the sensor and ensure it is fully seated and aligned Gas with full scale span gas NH3 mixed in AIR 0 3 L min until the 4 20mA output signal rise appears to slow down to around 0 1mA sec If the output signal rises above 20mA immediately begin adjusting span pot counter clockwise to lower mA output signal as maximum output is 30mA The rise in 4 20mA 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 20mA 0 5mA 200mV 5mV even though the signal may be slowly changing then remove the calibration adaptor and shut off the gas Do not gas the sensor for more than 2 5 minutes If the mA output signal begins to drop quickly during the gassing phase 0 2mA sec too much gassing time has passed and the process will need to be repeated Critical Note Make sure the calibration gas flow is in the direction of the arrow shown on the EC FX calibration adaptor Ensure the regulator hose is connected to the Inlet port side of the EC FX adaptor according to the air flow direction arrow molded into the plastic housing Inlet side o o Exit port side Note The rise in 4 20 mA output signal will typically begin to slow down
8. gin 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 20mA 0 5mA 200mV 5mV even though the signal may be slowly changing then remove the calibration adaptor and shut off the gas Do not gas the sensor for more than 2 5 minutes If the mA output signal begins to drop quickly during the gassing phase 0 2mA sec too much gassing time has passed and the process will need to be repeated Critical Note Make sure the calibration gas flow is in the direction of the arrow shown on the EC FX calibration adaptor Ensure the tubing from the regulator is connected to the Inlet port side of the EC FX adaptor according to the air flow direction arrow molded into the plastic housing Inlet side o o Exit port side Technical Note Page 2 of 7 Part Number 1998M0800 ECFX CALIBRATION PROCEDURE Revision 01 Honeywell Technical Note 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 t
9. he signal may begin to drop quickly after it peaks try your best to adjust the span pot until the output reaches 20mA 0 5mA even though the signal may begin to drop 11 Remove the calibration adaptor and shut off the gas 12 Unplug the sensor electrically from the EC F9 and ensure the mA output is 4mA 0 08mA If the output is out of this range perform Internal Zero step 6 again then plug the EC FX sensor back into the EC F9 13 Ensure output decays to a stable 4mA 0 2mA this should take about 5 to 15 min 14 Press the button for 2s to place the unit back into run mode Green LED on solid 15 The unit is now ready for operation FOR AN EC F2 NH3 INSTALLATION 1 Remove the old M 507975 Sensor 2 Adjust span pot down around 30 turns counter clockwise sometimes a faint clicking sound will occur when the pot is at the minimum This should be the lowest gain setting 3 Then turn the span pot 5 full turns up clockwise 4 Adjust the Zero POT until the 4 20mA output is 4mA 0 02mA 5 Connect the EC FX 100 250 LT sensor electrically to the EC F2 6 Wait until the output reaches a stable 4mA 0 15mA this could take upwards of 5 to 10 minutes depending on the temperature environment and ambient air flow Technical Note Page 3 of 7 Part Number 1998M0800 ECFX CALIBRATION PROCEDURE Revision 01 Honeywell Technical Note Note Keep hands away from the sensor in order for a stable output to be achieved as
10. il the green LED flashes slowly or for units equipped with an LCD option initiate the calibration mode using the front panel push buttons Note Unit will automatically revert back to run mode in 10 min 2 Ensure the 4 20mA output is a stable 4mA 0 5mA If it isn t wait to ensure the signal stabilizes In some cases opening doors changes the temperature environment and ambient air flow to the sensor which impacts it s stability during this procedure Note Keep hands away from the sensor in order for a stable output to be achieved as moisture and air flow can affect stability 3 Place the EC FX calibration adaptor EC FX CA on the sensor and ensure it is fully seated and aligned Gas with full scale span gas NH3 mixed in AIR 0 3 L min until the 4 20mA output signal rise appears to slow down to around 0 1mA sec When the output signal rises above 20mA immediately begin adjusting span pot counter clockwise to lower mA output signal as maximum output is 26mA The rise in 4 20mA 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 20mA 0 5mA 200mV 5mV 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 5 min If the mA output signal begins to drop quickly during the gassing phase 0 2mA sec too much gassing time has passed and the proc
11. l increase by 01 mA steps for each double press up to about 4 2 mA and then begin a round robin increment starting from about 3 7 mA Should there be overshooting on this adjustment simply continue to double press the button until the range ramp reduces to 3 7 mA Then double press the button the appropriate number of times to increase the mA output once again until a solid 3 95 mA to 4 05 mA output is reached Once complete press and hold the button until just the green LED is on solid This will exit out of the mA adjustment mode The unit must be placed back into Factory Calibration mode before proceeding to the next step Pressing the button for 10 seconds or until the green LED flashes fast 8 Connect the EC FX 100 250 LT sensor electrically to the EC F9 9 Wait until the output reaches a stable 4mA 0 5mA this could take upwards of 5 to 10 min depending on the temperature environment and ambient air flow Note Keep hands away from the sensor in order for a stable output to be achieved as moisture and air flow can affect stability 10 Place the EC FX calibration adaptor on the sensor by ensuring it is fully seated and aligned Gas with full scale span gas NH3 mixed in AIR 0 3 L min until the 4 20mA output signal rise appears to slow down to around 0 1mA sec If the output signal rises above 20mA immediately begin adjusting span pot to lower mA output signal as maximum output is 26mA The rise in 4 20mA output signal will be
12. moisture and air flow can affect stability 7 Place the EC FX calibration adaptor on the sensor by ensuring it is fully seated and aligned Gas with full scale span gas NH3 mixed in AIR 0 3 L min until the 4 20mA output signal rise appears to slow down to around 0 1mA sec If the output signal rises above 20mA immediately begin adjusting span pot to lower mA output signal as maximum output is 30mA The rise in 4 20mA 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 20mA 0 5mA 200mV 5mV even though the signal may be slowly changing then remove the calibration adaptor and shut off the gas Do not gas the sensor for more than 2 5 minutes If the mA output signal begins to drop quickly during the gassing phase 0 2mA sec too much gassing time has passed and the process will need to be repeated Critical Note Make sure the calibration gas is in the direction of the arrow shown on the EC FX calibration adaptor Ensure the tubing from the regulator is connected to the Inlet port side of the EC FX adaptor according to the air flow direction arrow molded into the plastic housing Inlet side o o 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
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