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BFT-48 Manual - Buckeye Fire Equipment Company

1. CONTRAST SMART SENSOR Tyre Cat Bead a D T P SMART SENSOR info menu only wi ERR ton chanas sPranit 164 available with Smart sensor installed LEL INPUT 1 L SYSTEM CONFIG PG 1 SYSTEM CONFIG PG 2 CURWE POINTS B Sosten Config Measurement Name 16 u Readout Deadband B4 Enter Key Senuence OS e alarn Sremas a gt Eunits NNNNNSNMNNN 419 DOWN ir ack e ie EDIT Lo access Se DU 4 TIMES wate Paint ZZ ensor In orma ion gt 7 dk Eunit inearization Data gt e Clock Delay A ae ae K e Bac kur Cont ig gt HEAT key to Exit Input l da Diagnostics gt Decimal Points o Restore or UFload gt Outeut 16 85 HELP Instructions gt Cal Sean Ual Sp Cal Marker 3 88mA see Manual HELP y Ts Sensor Lire HO Simple Sensor Installed_ Smart Sensor Installed LEL INPUT 2 A m ALARM SETTINGS m ALARM x SETUP Alarm 1 2 3 menus Be LCL Contrast Adi B Alarm 1 R we set Point 78 are identical Hodbus R5485 Port gt SE 4 J Dead Bid E SeECUPI1LY gt CS S K 7 e A te Alarm 3 Fail A DN Delas HS ae E Relay Config OFF Delay Gm mart sensor only 1 Firmware Rew oe ee i Catching NO EVENT LOG Edt 88 12 B4 BL AL IN Display Event Log 88 12 64 63 51 AZ IH Clear Event Log B8 1l2
2. ccccseeeeeseeeesseeeeeeeeeeeeeneeees 32 7 3 1 4 20mA Input Marker Message Technicians only ccccsseeeeeseeeeeeeees 33 BFT 48 User Manual i ss i Revision 3 5 E SECTION 1 SAFETY INFORMATION 1 1 Safety Information Read Before Installation amp Applying Power IMPORTANT Users should have a detailed understanding of BFT 48 operating and maintenance instructions Use the BF T 48 only as specified in this manual or detection of gases and the resulting protection provided may be impaired Read the following WARNINGS prior to use WARNINGS e Calibrate with known target gas at start up and check on a regular schedule at least every 90 days More frequent inspections are encouraged to spot problems such as dirt oil paint grease or other foreign materials on the sensor head e Do not paint the sensor assembly or the Transmitter e Do not use the BF I 48 if its enclosure is damaged or cracked or has missing components e Make sure the cover internal PCB s and field wiring are securely in place before operation e Use only a sensor assembly compatible with the BFT 48 and approved by Buckeye Detection Systems See the section for Replacement Parts Not Available this printing e Periodically test for correct operation of the system s alarm events by exposing the monitor to a targeted gas concentration above the High Alarm setpoint e Do not expose the BFT 48 to electrical shock or cont
3. ALARM x SETUP RELAY CONFIG B set Point 20 BKi Failsafe NO Dead Band 1 K2 Failsafe NO ON Delay Os K2 Acknowledge NO OFF Delay Om K2 Refresh Of f Low Trip NO K3 always Failsafe Latching NO ALARM SETTINGS B Alarm 1 Alarm 2 Alarm 3 Fail Relays Config Alarm Event Log VM NM V EVENT LOG Edit 08 12 04 03 17 A1 IN 08 13 04 02 18 AS OUT EN zee B gt Display Event Log 08 12 04 03 51 A2 IN OF LOG Clear Event Log 08 12 04 03 55 ACK 08 12 04 04 16 A2OUT 08 12 04 04 23 A1OUT 08 12 04 15 00 A1 IN 08 12 04 16 43 A1OUT 08 13 04 02 08 A3 in Figure 5 6 Alarm Settings Menus Set Point enters the engineering unit value where the alarm trips It may be negative and trip when monitored values fall out of range in this direction A3 has a default setting of negative 10 with Low Trip set for YES This makes it function as a FAULT alarm and trip when the monitored value falls to less than negative 10 It is important to adjust this value when the transmitter s span value is set for another value other than 100 For example a typical span setting for monitoring oxygen level is 25 therefore the fault level value should be adjusted to 2 5 which is equal to negative 10 of full scale Dead Band has a minimum value of 1 and a maximum value of 10 It is useful for preventing alarm cycling when the monitored value is hovering around the set point EXAMPLE
4. s respectively are 0 0 0 amp 0 00 Cal Span Value sets what upscale value must be applied when performing Span calibrations Readout Deadband allows forcing low values to continue to read zero This is useful when there are small amounts of background gases that cause fluctuating readouts above zero The highest amount of deadband allowed is 5 The 4 20mA output is not affected by this menu item 18 BFT 48 Instruction Manual Revision 3 5 SYSTEMS DETECTION Track Negative set to NO causes negative values to read the Zero 0 value in data displays The CAL MODE readout displays negative values regardless of this setting and negative values below the Fault set point will still cause the Fault alarm to trip The 4 20mA output always locks at 4mA when the reading is negative Temp Compensation allows user to adjust the gain and offset that is applied to sensors to compensate for temperature drift Factory supplied sensors are preprogrammed with these values are automatically uploaded to the BF T 48 from the smart sensor The default values are 1 000 for gain and 0 000 for offset With these default values entered there is no extra gain or offset applied to the sensor This menu is not accessible unless a smart sensor that is equipped with the temperature sensor is installed From the menu pictured in Figure 5 4 enter the gain and offset that will be applied into the BFT 48 The gain is applied to the span value This number is mul
5. Menu Figure 3 1shows the BFT 48 XMITTER CONFIG menu used to activate channels precisely calibrate 4 20mA outputs and set time date Its menus are set at the factory and typically not needed by the user To access from any data display press and hold the NEXT key for 5 seconds until the screen appears requesting a special key sequence 4 UP keystrokes 12 DETECTION BFT 48 Instruction Manual Revision 3 5 mm XMITTER CONFIG Enter Key Sequence We 02 TOXIC DR t o See Ment LEL CURRENT NEXT KEY Output Zero 5 SECONDS NEXT key to Exit Out put Span Real Time Clock See Manual HELP Model ST 48 BackLight Figure 3 1 Transmitter Configuration Menu 3 1 1 Single Dual Gas Monitor Configuration BFT 48EC s are 2 wire 4 20mA devices and support only one electrochemical sensor Addition of the BF10 0233 Power Supply board BFT 48LEL automatically adds the catalytic bead sensor input and dual 4 20mA outputs If both the O2 TOXIC and LEL Current menu items are ON the BFT 48 will function as a dual gas monitor with both sensor inputs and 4 20mA outputs active Either input may be turned off for single gas EC or LEL monitors 3 1 2 Output Zero Output Span Trims Factory Preset Technicians only The Output Zero Trim Output Span Trim entries are digital to analog D2A values that determine the BFT 48 s final 4 20mA output Their purpose is to provide precise BFT 48 4mA and 20mA outputs To trim thes
6. a FAULT relay and an RS 485 Modbus RTU slave port Figure 2 6 This board is piggybacked behind the BF10 0232 Display Assembly Figure 2 3 Addition of this option requires 3 wire mode 4 20mA operation and thereby requires the BF10 0233 I O Power Supply board Figure 2 5 This is since relays and RS 485 circuits require much more power than 2 wire 4 20mA loops can deliver CAUTION Alarm relays have dry contacts and power must be supplied from an external source lf this power source exceeds 3 amps users should consider fusing relay wiring with 3 amp fuses Contacts are rated for RESISTIVE loads Inductive loads such as contactor coils or motors may cause contact arcing which shortens life and emits RFI into the sensor signals Use appropriate arcing snubbers and MOV s across inductive loads and keep wiring away from signal wires External wiring to TB3 Remote Alarm Reset should be shielded and protected from noise spikes to prevent false Alarm Reset BF T 48 Instruction Manual Revision 3 5 Remote Alarm Reset CR O J P Assy 10 0234 Alarm ModBus Option Relay 1 K1 A Installs RS 485 Terminating Resistor B Omits RS 485 Terminating Resistor Relay 2 K2 RS 485 A amp B terminals are Relay 3 connected internally for easier K3 IN OUT cabling Gs no connect for shield to continue Figure 2 6 BF10 0234 Alarm Relays Modbus Option Instructions Unscrew the cover on the BF T 48 explos
7. the Setpoint value the heater is on This feature is helpful in applications where the sensor temperature must be higher than the ambient temperature to function properly A LEL INPUT 2 LCD Contrast Adj Modbus RS485 Port Security Technicians ONLY B gt sensor Temp Firmware Rev LEL MOS TEMP Sensor Temp 28 Zb EDIT gt Set point 0 00 VV NN V Figure 7 1 ARCTIC Sensor Temperature Menu 7 2 Special Order 18VAC Primary Power Supply Option A special revision of the BFT 48 I O Power Supply is available for applications requiring 18VAC as primary power instead of the standard 10 30VDC Order I O Power Supply part 10 0233 18VAC 18VAC is applied to a bridge rectifier and filter capacitor to generate unregulated 24VDC The BF10 0233 18VAC revision is also configured to accept 4 20mA inputs from 2 or 3 Wire 4 20mA Transmitters into terminals normally reserved for Bridge Sensors References to Bridge 31 BF T 48 Instruction Manual Revision 3 5 sensors within the main body of this manual DO NOT APPLY TO THIS REVISION The 10 0232 Display Assembly is the standard revision and Smart or Simple electrochemical Toxic Oxygen sensors may still be connected as described in this manual Figure 7 2 shows physical and electrical wiring diagrams 5 Watt TB1 24VDC Output 1 4 20mA Unregulated 2 Transmitter 4 20mA Input Ga 2 I V Wi Amplifier EC SH 24VDC Common A 3 U
8. 2012 Update Sections 3 1 4 3 1 5 5 3 5 10 and added Revision History page Revision 3 5 4 18 2013 Update Figures 2 2 and 2 2a Buckeye Detection Systems 110 Kings Road Kings Mountain NC 28086 1 800 438 1028 www buckeyefire com bfec buckeyef com 35
9. 64 83955 ACK 88 12 84 B416 AZOUT R5485 MODBUS SETUP RELAY CONFIG a a ee a B PTW Address 1 Bhi Failsafe HO a i2 G4 16 43 ALOUT Baud Rate 3688 KZ Failsafe HO 08 7137604 Beas AZ y Parity Hone E2 Acknowledge HO Stor Bit 1 K2 Refresh orf Down kA always Failsafe He 13 b4 15 AJOUT INSTALL SENSOR menu not Ee tee available with Smart sensor installed END Oe LOG r SENSOR SETUP INFO enn INSTALL SEWSOR m INSTALL SENSOR A EDIT to ins oe Historical CAL data Recall Cal History alen Hew Sensor EDIT Will be Deleted Input Tare Cat Bead gt es Hew Sensor Bl 2o 64 Ana other kes EDIT to Accert Paean Cal Wa 5 04 to Exit HEST to Abort ensor Life MM MMM rp CLOCK DELAY SETUP m CALIBRATION DATES Tine 12 35 42 Record 22 of 22 Date _ B4e22 84 CAL Date 84 65 04 Warm Up Sec 184 Cal Purge Sec Lon UP DOWN to scroll HEST to EXIT NEXT to EXIT SHt Born One 1970564 es a ge ae Og rae ANY key to Exit fk WARNING act DIAGMOSTICS m OUTPUT STIMULATOR Enter Key Sequence PRESS glar J 11 Lo EE nues be halted dur ing Pee ee een ena SECHS desk a NEXT key to Exit Ee EE EDIT to continue et See Manual HELP Ana other to exit rp SYSTEM SECURITY 7 m ACTUATE RELAYS BP Contact Hame Secure Level LOW gt i RE Fass Code Relay 3 OFF Unlocked WARNING Variables in the
10. ATMOSPHERE MAY BE PRESEN MODE MAXIMUM VOLTAGE 42 VDC MAXIMUM POWER 10 WATTS C EC do Sp EEx d IIB H9 T3 AMBIENT 40 C lt Ta lt 60 C company name INV 2007 OSL ATEX 1845 address SERIAL NO 2 3 Sensor Location Factors such as air movement gas density in relation to air emission sources and environmental variables affect correct sensor location Air movement by fans prevailing winds and convection should be carefully evaluated to determine if a leak is more likely to raise gas levels in certain areas within the facility Vapor density of a gas determines if it will rise or fall in air when there are no significant currents Lighter than air gases should have the monitors mounted 12 18 inches 30 45 centimeters above the potential gas leak and heavier than air gases should be this distance below Even though the BFT 48 is designed for rugged service sensors should be protected from environmental damage from water snow shock vibration and dirt BF T 48 Instruction Manual Revision 3 5 2 4 Mounting the Enclosure The BFT 48 standard enclosure is a cast aluminum explosion proof NEMA 7 enclosure as shown in Figure 2 2 Figure 2 2a shows dimensions with the dual local sensor Y included Universal Sensor Head single Sensor Configuration shown with optional 10 0247 smart sensor head Figure 2 2 BFT 48 Explosion Proof Housing a Eessen Dual Sensor Configuration
11. TR only at end of line RTU TB2 TB2 Assy 10 0234 ST 48 Alarm ModBus Option Assy 10 0234 STAR Alarm ModBus Option Assy 10 0234 ST 48 Alarm ModBus Option 3 TB2 1 connects to TB2 4 internally amp TB2 2 connects to TB2 5 internally to simplify arrive depart cabling se NO FO mo F DO DOF NW FTN en STN Ory o DMF WW Fr o en st YH Oo FY o DD 10 0234 ModBus 10 0234 ModBus 10 0234 ModBus 4 TB2 3 is no connect for cable Alarm Relay Alarm Relay Alarm Relay shield continuation Option Board Option Board Option Board Address 1 Address 2 Address 3 Figure 2 7 RS 485 Modbus Wiring SYSTEMS BF T 48 Instruction Manual Revision 3 5 2 10 Isolated 4 20mA Output 10 0250 Option Description The optional BF10 0250 Isolated 4 20mA option Figure 2 8 provides dual 4 20mA outputs that are electrically isolated from sensor inputs and the 24 VDC power source Each 4 20mA output share the same common terminal and are not isolated from each other This board is oiggybacked behind the BF10 0232 Display Assembly Figure 2 3 Addition of this option requires 4 wire mode 4 20mA operation and thereby requires the I O Power Supply board Figure 2 5 Isolated 4 20mA Output Option Assy 10 0250 Iso 4 20mA Out O Figure 2 8 BF10 0250 Isolated 4 20mA Output Option 2 11 Sensor Installation with Smart Simple Sensor Definition Many manufacturers offer in
12. is stable approximately 1 minute press the EDIT key to perform a ZERO calibration If the ZERO calibration is successful press the NEXT key to proceed to the SPAN check Apply the correct SPAN gas at 5 liters min After the reading is stable approximately 1 minute press the EDIT key to perform a SPAN calibration WARNING The SPAN gas used must match the value specified since this is what the BFT 48 will indicate after a successful SPAN calibration The Cal Span Value may be edited if it becomes necessary to apply a different gas concentration see Cal Span Value in section 5 3 5 Ifthe SPAN calibration is successful the display flashes REMOVE CAL GAS and starts the CAL PURGE delay 6 CAL MODE will be complete after the end of the CAL PURGE delay The flow chart in Figure 4 2 illustrates the above procedure UP CAL NEXT amp EDIT labels indicate keystrokes using the magnetic wand The CAL MODE information screen top of the chart is available for advanced users to see Offset Gain calibration constants and live analog to digital converter A D counts Span Gas calibration values may also be edited from this screen Holding the UP key for 5 seconds during CAL MODE displays this screen Calibration history records are logged and may be viewed in the Sensor Information menu see section 5 5 live pgadinarkunits CAL MODE info screen Cal Span Value xxxxxx use to change SPAN GAS value le Scan hr and to see
13. units for this sensor These EUNITS may be accepted by pressing the EDIT key or changed by moving the pointer to Custom and editing as described in Configuration Using the Magnetic Wand in section 5 2 SELECT INPUT Cat Bead 3 Wire UP DOWN to change EDIT to select NEXT to exit Negative Negative Negative Negative Bias Negative Bias Negative Negative Negative Negative Negative Negative Negative Negative Negative Negative Positive Positive Positive 6 6 EDIT SELECT EUNITS Rey LEL Custom Figure 6 6 Input Type Selection Menu Coefficient Electrochemical Sensor Type Default EUNITS Hydrogen Sulfide Oxygen Carbon Monoxide Ammonia Nitric Oxide Ethylene Oxide Hydrogen Chloride Hydrazine Arsine Sulfur Dioxide Hydrogen Hydrogen Cyanide Phosgene Phosphine Hydrogen Fluoride Nitrogen Dioxide Ozone Chlorine Zero Cal Value Technicians only ppm H2S Oxygen pom CO ppm NH3 ppm NO ppm Eth O2 pom HCL ppm N2H4 ppm Arsine ppm SO2 ppm H2 pom HCN ppm COCI2 ppm PH3 pom HF ppm NO2 ppm Ozone ppm Cl2 The Zero Cal Value menu entry allows the zero calibration value to be set for something other than a zero reading For example a BFT 48 4 20mA input may represent a BTU Analyzer range of 500 1000 BTU s In this case 0 of full scale equals 500 BTU s and may be the desired zero calibration point Other upscale values may also be used for
14. value is incorrect apply the desired up scale input and use the UP DOWN keys to obtain the correct Reading value Counts are the 10 bit binary A D value with an active range value of 0 1023 CAUTION For standard installations this is a factory adjustment Do not use the PreAmp Gain Set menu for calibrating sensors It should only be adjusted if a new measurement gas or input range is required PGA Setup Gain 25 0 Counts 10 11 Reading 100 Up Dn to Change Next to exit Figure 6 5 PreAmp Gain Adjust PGA Menu 6 5 Simple Sensor Input Type Technicians only Smart sensors automatically configure Input Type Simple inputs must be configured manually using the Input Type menu Input Type configures BFT 48 hardware to accept bridge sensors positive coefficient electrochemical sensors negative coefficient electrochemical sensors or 4 20 mA inputs Catalytic bead and 4 20mA inputs require 3 wire operation and the BF10 0233 I O Power Supply Note Additional factory installed solder bridge modifications are required for 4 29 BF T 48 Instruction Manual Revision 3 5 20mA inputs see section 7 2 and 7 3 Positive Negative coefficient electrochemical sensors have several gas types available within each group see table below Biased EC sensors require factory installed solder bridge SB1 on the Display Assy PCB see Addendum 3 After selecting Input Type a SELECT EUNITS screen indicates the default engineering
15. yee shown with optional GE 10 0247 smart reg tg sensor heads 0010 1200 Y Fitting not available s 0N ATEX compliant model Figure 2 2a BFT 48 Explosion Proof Housing with Dual Sensor Head Adaptor Modular design simplifies the installation of the BFT 48 Figure 2 3 A top Display Assembly is mounted with captive thumbscrews and is easily removed to access field wiring terminals An optional BF10 0234 Alarms Modbus board mounts piggyback to the back of the Display Assembly Wiring from toxic or oxygen sensors terminates at the BF10 0232 Display Assembly along with 2 wire 4 20mA signal wires This Display Assembly is the only PC board supplied with toxic oxygen BFT 48s not requiring relays RS 485 Modbus or LCD backlight The optional bottom BF10 0233 I O Power Supply board generates voltages needed for LCD backlight relays 4 BF T 48 Instruction Manual Revision 3 5 RS 485 Modbus and Bridge sensor and is required with any of these I O functions The enclosure is equipped with two threaded 3 4 inch NPT conduit fitting outlet and pre drilled mounting flanges WARNING Qualified personnel should perform the installation according to applicable electrical codes regulations and safety standards Insure correct cabling and sealing fitting practices are implemented Do not aim the sensor pointing upward Install the BFT 48 to a wall or bracket using the predrilled mounting flanges with I D 0 25 on 5 5 inch centers Figure 2 2 If co
16. 0mA Memory Non volatile E2 memory retains configuration values in the event of power outages DETECTION SYSTEMS BF T 48 Instruction Manual Revision 3 5 Loop Resistance at nominal 24 VDC power 650 ohms maximum in 2 wire mode 750 ohms maximum in 3 wire mode Relays Optional Three configurable form C SPDT relays rated for 5 amp at 30 VDC or 240 VAC RESISTIVE Relay 1 and Relay 2 level alarms are configurable for HIGH or LOW trip for normally energized Failsafe or normally de energized and for latching or non latching Relay 3 is always normally energized for failsafe operation so loss of power to the BF T 48 will be indicated as a FAULT condition CAUTION Relays are rated for RESISTIVE loads Inductive loads such contactor coils or motors may cause contact arcing which emits RFI into the sensor signals Use appropriate snubbers and MOV s across inductive loads and keep wiring away from signal wires 2 6 Field Wiring Installation 4 20mA Transmission Range Info The distance 4 20 mA signals can travel is dependent upon several factors including the cable gauge DC power supply voltage level and impedance of the input of the receiving device Assuming a nominal 24 VDC power supply maximum total loop resistance is 650 ohms in the 2 wire mode Note BFC 16 Controllers have 4 20mA input resistance of 100 ohms 2 7 2 Wire 4 20mA Intrinsically Safe amp Explosion Proof Installations BFT 48 EC s equi
17. 10 4 NA 16 bit signed integer ranging from 1 to 100 where 1 indicates Cal Required Chan 1 Sensor Temperature 31011 4 NA Chan 2 Sensor Temperature 31012 4 NA 16 bit integer ranging from 1 to 4095 scaled for 55 to 125 degrees C Memory Floating Point Note Returned as 15bit plus sign 2s complement with 5 over under range applied Consider over under range when scaling values to be displayed at the workstation The following equation may be used to determine a value for display Display Value MODBUS Value Span Value Zero Value 1 1 4 Zero Value Span Value Zero Value 05 32767 FP Value Chan 1 33001 4 NA FP Value Chan 2 33002 4 NA 25 BF T 48 Instruction Manual Revision 3 5 Memory ASCII Strings User Info Chan 1 40401 40408 3 User P eae 2 40409 40416 3 16 uer EN 2 per register assigned to the unit identifier read as bytes Chan 1 ASCII Reading 40417 40419 3 Chan 2 ASCII Reading 40420 40422 3 6 ASCII characters 2 per register reflecting the display readout EUNITS Chan 1 EUNITS Chan 2 40423 40427 3 40428 40482 3 10 ASCII characters 2 per register assigned to the engineering units read as bytes Byte Variables PreAmp Gain Ch1 40433 3 PreAmp Gain Ch2 40434 3 2 bytes representing Pre Amp HiByte and PGA LoByte settings Firmware Version Version Memory Reals 40435 40436 4 ASCII characters 2 per register reflecting the firmware version 3 NA NA NA Not
18. 2 terminal 3 is for LEL 3 wire 4 20mA output signals Instructions Unscrew the cover on the BFT 48 explosion proof enclosure Loosen the 2 thumbscrews holding the display assembly in place and remove it A small ribbon cable is attached with sufficient length to allow access to the I O PCB mounted in the bottom of the enclosure Figure 2 5 Power and signal connections are to TB2 where 24 VDC Signal and Common wires must be connected A blocking diode protects the BFT 48 if polarity of the power supply is reversed but it will not operate Reassemble the BFT 48 Follow the procedures and recommendations in the receiver and power supply manuals to complete the installation Be sure the BFT 48 enclosure and conduit are properly grounded Apply power and the BFT 48 should function Proceed to section 3 BF T 48 Instruction Manual Revision 3 5 YS Yo VO Power Supply SS Me e CCS Assy 10 0233 i Sa TB2 3 wire xmtr 20 s m Q E ee eaa 3 TB1 Simple Bridge GND OUT 4 20s IW O LG CG sensor input Sensor excitation volts eve OP between REF amp ACT TB2 2 Toxic O2 TB2 3 Bridge OQ Zz O i O 4 2 S2 Ribbon to Display Assy TB1 O O d S1 Smart Bridge sensor input only Figure 2 5 BF10 0233 UO Power Supply 3 Wire 4 20mA Assembly 2 9 Alarms RS 485 Modbus BF10 0234 Option Installation Description The optional BF 10 0234 Alarms RS 485 Modbus board supplies two level alarm relays
19. 5 mm 5 7 LCD Contrast Adj LCD Contrast Adj may be set for optimum viewing using the menu shown in Figure 5 10 CONT RAST UP DOWN to change NEXT to EXIT Figure 5 10 LCD Contrast Adjust Menu 5 8 HELP Screen The HELP screen contains several pages of information describing how to operate the BFT 48 This is the bottom menu on page 1 of the SETUP screen 5 9 Diagnostics IMPORTANT Gas monitoring and alarm processing are not performed while using the Diagnostics menus Access requires a special key sequence of four consecutive UP keystrokes There are two Diagnostics menus useful for driving outputs without exposing the sensor to the target gas The OUTPUT SIMULATION menu allows setting the 4 20mA output to virtually any desired value This is useful for checking responses of devices receiving the BFT 48 s 4 20mA output The ACTIVATE RELAYS menu allows tripping of alarm relays if equipped without tripping alarm set points with the target gas This is useful for testing alarms events such as lights and audible devices WARNING DIAGNOSTICS OUTPUT STIMULATOR Alarm processing will EDIT We Output Stimulation Out put 4 0 mA be halted during Relay Test diagnostic mode EDIT to change Next to exit EDIT to continue Any other key to exit ACTIVATE RELAYS Relay 1 OFF Relay 2 OFF Relay 3 OFF Figure 5 11 Diagnostics Menu
20. 8 Instruction Manual Revision 3 5 Dual Channel Split Screen Engrg Units Bar Graph Engrg Units 30 Minute Trend Dual Sensor Mode Only is WW GR WW ALM RST UP atm ALm2 FAIL NEXT UP ami ALM2 FAIL NEXT UP atm ALM2 FAIL NEXT NEXT key NEXT key toggles toggles readout K readout lt gt easuremen DOWN CAL DOWN CAL Figure 2 1 Data Displays 2 2 Ratings and Certifications CSA certified for Division 1 amp 2 hazardous area installations for explosion proof Class 1 Groups B C D and intrinsically safe BFT 48 EC 2 wire loops only Class 1 Groups A B C D Also see sections 2 7 2 7a amp 2 8 Designed to meet CSA C22 2 No 152 for Combustibles Monitors and ISA 92 0 01 Part 1 for Toxic Monitors 2 2 1 BFT 48 ATEX Certified Model An ATEX certified BFT 48 model certificate DNV 2007 OSL ATEX 1845 is also available by changing the BFT 48 designation to BFT ATEX48 ATEX certified models including sensors are supplied only with sensor head part BF10 2072 and are not available with the BF10 0247 sensor head or the BF0010 1200 Y fitting ATEX installations must be in compliance with EN60079 14 or suitable National or international standard and all cable glands and closing devices must carry a suitable ATEX marking The ATEX label is shown below DO NOT OPEN WHEN AN EXPLOSIVE GAS
21. BF T 48 Instruction Manual Revision 3 5 3 2 Initial Bridge Sensor Monitor Start Up BFT 48 LEL Monitors that are factory equipped with a local Simple or Smart Bridge sensor rarely require adjustments other than routine calibrations to provide accurate LEL readings However after installation the following checks should be performed to insure proper operation In addition alarm levels Measurement Name ASCII fields and other variables may require configuration by users in order to best serve their application 3 2 1 Initial Bridge Sensor Monitor Sensor Volts Check CAUTION Sensor Volts in excess of the rated values may destroy catalytic bead sensors BFT 48 sensors are rated for 2 volts Section 6 2 describes reading and setting sensor volts using the BFT 48 LCD The voltage displayed on the LCD is monitored across TB1 REF and TB1 ACT on the BFT 48 Power Supply board Figure 2 4 and may be confirmed with a voltmeter This TB 1 value is correct for locally mounted sensors only Sensors mounted more than a few feet away from the BFT 48 may receive a lower voltage due to the inherent voltage drop across sensor wiring Remote mounted sensors must have their sensor voltage across ACTIVE and REFERENCE beads measured AT THE SENSOR end of the cable The BFT 48 setting will require a higher value in order to achieve the correct voltage at the sensor Correct sensor voltage should be confirmed after start up for locally and remotely mounte
22. BFT 48 User Manual Revision 3 5 INSTRUCTION MANUAL BUCKEYE DETECTION SYSTEMS MODEL BFT 48 TRANSMITTER A Warning Read amp understand contents of this manual prior to operation Failure to do so could result in serious injury or death Users are responsible for correct translations of this manual into their native language DETECTION BFT 48 Instruction Manual Revision 3 5 CS SECTION 1 SAFETY INFORMATION cceeeeeeeeeceeeeeeecnnnnsseeseeeneeeeeeeeeeeeeecnnannenssees 1 1 1 Safety Information Read Before Installation amp Applying Power 008 1 SECTION 2 INSTALLATION INSTRUCTIONS ccccceeeeeeeeeeeeeeeeseeseeeeesseeeeeeeseeeeenoeeeneeeesnnees 2 2 1 BUENO CICA EE 2 2 2 Ratings and Certifications ivisiecccnciccsivecswetencsssrsvecewendususevseweccaciseresecauevessucsivevaweteneenadenes 3 2 2 1 BFT 48 ATEX Certified Model cccccccessssssnssseeeeeseeeeeeeeeeeeeeccennnnnsseeeseeeesees 3 23 SENSO COCALO aone E E TE E 3 24 MOUNTING the le e TC 4 2 5 System Design Specifications cccceeeeeeecesssseseeeeeeeeessneeeeeseeeoessnsseeesseeeoeenneeees 5 2 6 Field Wiring Installati n sccsitessccssdiescessesestesccsatnecsssteweetsenescntedseceesuvecucceweuseedtwncupseucuaeses 6 2 7 2 Wire 4 20mA intrinsically Safe amp Explosion Proof Installations 008 6 2 8 3 Wire 4 20mA Mode Installation c
23. Contrast EE 23 5 8 HELP SOCEM KEE 23 59 LUS 23 5 10 R9 485 MODBUS SETUP eer ea evs NEES 23 5 10 1 MODBUS REGISTER AND FUNCTION CODE SUMMARY ccccceeeeee 24 Sell SYSTEM SECURITY si 27 SECTION 6 TECHNICIANS ONLY MENUG 0000 ccccccceceeeeeeessseeeeeeessssesneeeeeeeeeeeeeeeeeeesseeeeneees 27 6 1 Jee ei de E 27 6 2 Set Balance Set Sensor Voltage Technicians Only cccsseseeeeeeeseeeeeeeeeee 28 6 3 Set Gain to Unity Technicians Only cccccsssessseeeeesecseesssseeeeeeeeeeesneeeeeseeeeeeeees 29 6 4 PreAmp Gain Adjust Technicians Onlly cccseeeessscsssssseeeeeeseeceeseneeeseeeeeeeeees 29 6 5 Simple Sensor Input Type Technicians Only ccccccsessssseeeeeceeesssneeeeeeeeeeeeeees 29 6 6 Zero Cal Value Technicians Only cccccsessseceeeceesseeeeecensseeeseeseeeeseoenseeeeseoeaes 30 6 7 Raw Min Max Counts Technicians Only ccccssssseeeesessseeeseeeesseeeseeeeseeeseoenes 30 6 8 4 20mA Input Marker Message Technicians Only 2 ccsccceeeeeeeeeeeeeeeeeeeeeeees 31 SECTION 7 SPECIAL ORDER CONFIGURATIONS ccccccceessssscsessseneeseeeeeeeeeeseeeeeeoeaeeennees 31 7 1 ARGTICODUOM EE 31 7 1 1 ARCTIC Smart Sensor Temperature Setpoint Option ccccseeeeeeeeeeeeeeeees 31 7 2 Special Order 18VAC Primary Power Supply Option cccccccessssseseeeeeseeeeeeees 31 7 3 Special Order 4 20mA Input to Bridge Channel
24. FT 48 Smart sensor interface will automatically detect new smart sensors and this menu is therefore not available with a smart sensor connected Recall Cal History recalls each successful calibration These dates may be reviewed by scrolling with the UP DOWN keys Input Type indicates what kind of input or sensor the BFT 48 is configured to accept and is typically pre configured at the factory There are five Input Type possibilities consisting of bridge EC negative EC positive 4 20mA and Smart Smart sensors upload sensor type and other data to the BFT 48 and may be viewed on the SMART SENSOR information screen New Sensor displays the date when a new sensor was last installed Recent Cal displays the most recent calibration date 5 6 CLOCK DELAY SETUP Since the BFT 48 is equipped with a Real Time Clock amp Calendar Time and Date must be set to correctly match its location They are set at the factory in a 24 hour format but may require adjustment to match the location s time amp date after shipment Follow the procedure in Configuration Using the Magnetic Wand in section 3 3 Warm Up and Cal Purge time delays are also available to prevent unwanted alarm trips Figure 5 9 shows the menu for these items p CLOCK DELAY SETUP B gt Ti me 12 35 42 Date 04 22 04 Warm Up Sec 120 Cal Purge Sec 100 Figure 5 9 Clock amp Calendar Delay Timer Menu 22 DETECTION BFT 48 Instruction Manual Revision 3
25. IT to confirm NEXT to exit PGA SETUP Gain 25 0 Counts 1011 Reading 100 Up Dn to Change Next to exit SELECT INPUT SELECT EUNITS Cat Bead 3 Wire EDIT BR LEL Custom UP DOWN to change EDIT to select NEXT to exit Figure 6 1 Technicians Menu Tree E TECHNICAL PAGE 1 E TECHNICAL PAGE 2 A Set Balance B Raw Min Cnts 511 Set Sensor Voltage Raw Max Cnts 1000 Set Gain to UNITY PreAmp Gain Set Input Type ZERO Cal Val 0 NV VM MM lt 4 Figure 6 2 Technicians Menu Entry 6 2 Set Balance Set Sensor Voltage Technicians only Set Balance and Set Sensor Voltage are used when Input Type is for Bridge sensors They are factory configured and only require field adjustment if the catalytic bead sensor is mounted remote from the BFT 48 or if a new sensor is installed Other input type entries draw a line through these menus and they are inactive BFT 48 bridge sensors may be from 2 to 6 volts excitation voltage at the sensor This means if the sensor is mounted a long distance away the voltage at the BFT 48 may have to be higher to compensate for losses in field wiring Be careful not to exceed correct sensor volts at the sensor s A and R terminals 28 DETECTION BFT 48 Instruction Manual Revision 3 5 mm Set Balance allows balancing of the catalytic bead sensor and must only be performed with ZERO gas on t
26. O PCB assembly Figure 2 5 10 DETECTION BF T 48 Instruction Manual Revision 3 5 J SYSTEMS Smart EC or e og Smart Sensor Head Base Bridge Sensor sensor Head Cap it DER ES ou element gt gt Red Sensor 3 Ke Green Spare z Brown 3 3V Vcc Blue Clock White Data Black Common SSC i q d Orange Sensor 1 R AY V a Yellow Sensor 2 A My ee Bridge Sensor Industry standard Catalytic Bead ee series 7 EC age ed toxic oxygen MOS Conductor Smar 1 87 senean Sensor Interface Cable H Onboard Memory IC interfaces to serial data bus Stores all data required to display amp alarm monitored values Figure 2 9 BF10 0247 Smart Sensor Head Assembly Smart Sensors are automatically recognized by the BFT 48 The Smart Sensor identification screen in Figure 2 10 is shown after power up upon installation of a new smart sensor or by viewing INPUT type in the SENSOR SETTINGS INFO menu section 5 5 SMART SENSOR ERROR CODE 01 Type Cat Bead Incorrect Sensor T 100 installed Install If installed sensor Zero 0 correct sensor or t d t tch SN XXXXXX update transmitter ype aoes not Matc Born On 01 28 04 SEE MANUAL transmitter database Last Cal 04 05 04 EDIT key to update ANY key to Exit Any other to abort Figure 2 10 Smart Sensor Info ERROR Screens 2 12 Sensor Type and BFT 48 Signal Conditioning Cat
27. O Power A D Supply board with Neg 18VAC Power Input 4 20mA OUTPUT Order 10 0233 18VAC Message Pos TB Bridge Rectifier muar Lu 4 Filter Electrochemical Ce 4 20mA OUTPUT Capacitor t 44 20ma OUTPUT LR Amplifier mun Field Wiring gt lt Monitor 10 0233_18VAC is a special configuration allowing power from an 18VAC power source and is available by special ee O order DO NOT APPLY 18VAC AS g 5 mm A q gt CH a O O TO STANDARD UNITS SP H assy een mam S z gS S guod amp s 36 ieee dech 12 3 4 1 2 3 24VDC OUT is unregulated DC power 4 20 OUT SIG Term on 1 OO ADD generated from 18VAC input power 4 20mA IN accepts milliamp signal inputs 24VDC COMMON is RETURN rail for both 4 20mA Input and Output See Block Wiring diagram TB2 sources output Use 24VDC COMMMON term on TB1 for 4 20 OUT SIG Term S2 Ribbon to Display Assy fe oo 1 d Figure 7 2 10 0233 18VAC Block Wiring Diagram 7 3 Special Order 4 20mA Input to Bridge Channel A special model BFT 48EC I is available for applications requiring a 4 20mA input includes I O Power Supply part BF10 0233 4 20mA Solder bridges are factory installed to rewire TB1 to continue 24VDC power on to a 4 20mA transmitter as shown in Figure 7 3 below 32 BF T 48 Instruction Manual Revision 3 5 TBI 24VDC G 4 20mA Transmitter 4 20mA I
28. Offset Gain constants ffset xx Gain xxx PGA AKERA HEST Return to Cal Hold UP key 5 sec Hold UP key 5 sec Back to DATA DATA DISPLAY DISPLAY el a CAL then EDIT je S TAL veer KEY eee eis NEXT REMOVE live ll es live pall ita its C A L E A D to Set ZERO o Set SPAH S Ce LEL EDIT EDIT t HEST 5FAH CAL Mode HESTSESNIT CAL Mode Measurement Name ve LEL Neasurener t Name EDIT EDIT If ZERO Cal Fails If ZERO Cal OK If SPAN Cal Fails If SPAN Cal OK show for 5 seconds show for 5 seconds REPEAT CAL REPEAT CAL SFAH CAL ZERO FAIL ZERO CAL SPAN FAIL Successful ERROR CODE 4 successful ERROR CODE 3 Sensor Life Figure 4 2 Cal Mode Flow Chart and Menus 4 2 ALARM OPERATION BFT 48 s have front panel LED indicators for Alarm 1 Alarm 2 and Alarm 3 An optional BF10 0234 Relay Modbus board adds K1 K2 amp K3 relays for these alarms CAUTION BFT 48 Alarm LED indicators function even without the presence of the BF10 0234 Relay option With 2 Wire 4 20mA operation to conserve power alarm LED s only flash during alarm events With 3 Wire 4 20mA operation alarm LED s flash when new and become steady after an operator ACKNOWLEDGE pressing the UP RESET key 4 2 1 ALARM 3 UNDERSTANDING FAULT LEVEL OPERATION The A3 alarm is typically dedicated to FAULT conditions indicating sensor fa
29. Technicians Only menu are critical for correct operation A thorough eebe SE of each variable is required READ amp UNDERSTAND THE MANUAL Technicians Only menus discussed in Section 6 Figure 5 1 Configuration Menu Tree 5 2 Configuration Using the Magnetic Wand Passing the magnetic wand past the EDIT key from either data display displays SETUP PAGE 1 as shown in Figure 5 2 The UP DOWN keys maneuver the pointer while EDIT enters sub levels of menu items All SETUP menu items have at least one page of sub menus Items with sub menus are indicated by the gt symbol right hand pointing arrow at the end of each line Edit 17 BF T 48 Instruction Manual Revision 3 5 menu items by pointing to them press the EDIT key to display the cursor press UP DOWN to change that character press NEXT to move the cursor then press EDIT again to load the new item and remove the cursor Press NEXT to reverse out of the sub menu To view SETUP PAGE 2 press the DOWN key with the pointer aimed at the bottom item on PAGE 1 LEL INPUT 1 B system Config Alarm Settings Sensor Information EDIT Clock Delays Diagnostics HELP Instructions LEL INPUT 2 B gt CD Contrast Adj Modbus RS485 Port Security Technicians ONLY A gt gt gt gt Firmware Rev Sensor Temp menu only present with Arctic smart sensor installed See section 7 1 Figure 5 2 Setup Menu Entry 5 3 System Configuratio
30. Witha 20 BF T 48 Instruction Manual Revision 3 5 range of 0 100 ppm if Dead Band equals 5 and the set point is 20 ppm after tripping at 20 pom the value must drop below 15 ppm to reset ON Delay allows entering a maximum 10 second delay before this alarm becomes active This is useful for preventing nuisance alarms caused by brief spikes beyond the set point OFF Delay allows entering a maximum 120 minute delay before clearing an alarm after the alarm condition is gone This is useful for continuing an alarm function such as operation of an exhaust fan for a period of time after the alarm condition clears Low Trip set to YES causes the alarm to trip as the value falls below the set point Latching set to YES causes the alarm to remain active even after the condition is gone and only reset when the UP RESET key is pressed from a data display 5 4 1 Relay Configuration if equipped Relay Config has the submenu shown in Figure 5 7 The optional relay PCB must be installed to access this menu or a HARDWARE NOT PRESENT message appears RELAY CONFIG Wei Failsafe K2 Failsafe NO K2 Acknowledge NO K2 Refresh Of f K3 always Failsafe Figure 5 7 Relay Config Menu K1 K2 Failsafe set for YES means the relay de energizes during alarm and energizes with no alarm This is useful for also signaling alarm when BFT 48 power is lost K3 is a FAULT alarm and is always failsafe K2 Acknowledge set for YES
31. acklit LCD amp Alarms RS485 option Smart electro chemical sensor input Ribbon to optional I O Power Supply PCB req d for 3 wire 4 20mA Alarms Modbus amp LEL sensors Simple electrochemical sensor input Figure 2 4 BF10 0232 Display 2 Wire 4 20mA Assembly 2 8 3 Wire 4 20mA Mode Installation CAUTION BFT 48 s equipped with the BF10 0233 I O Power Supply board only operate as 3 or 4 wire 4 20mA transmitters and are not compatible with 2 wire intrinsically safe installations see sections 2 7 and 2 7a Such units should not be combined with BF10 0247IS Sensor Heads without flame arrestors unless the area is classified as non hazardous BFT 48 s equipped with the BF10 0233 I O Power Supply and BF 10 0234 Alarms Modbus option are NRTL certified as suitable for Div 1 amp 2 Groups B C D explosion proof installations with the BF10 0247 or with any sensor head with an equivalent CSA certification Description 3 wire sourcing transmitters require an additional dedicated 24 VDC wire The 4 20mA loop current is then delivered or sourced from the transmitter output and the receiver device must not provide 24 VDC from its input terminal When the BFT 48 is equipped with the bottom BF10 0233 I O Power Supply board shown in Figure 2 5 the 2 wire 4 20mA output is disabled and one of the BF10 0233 s 3 wire outputs must be used TB2 terminal 2 is for ECHEM toxic oxygen 3 wire 4 20mA output signals and TB
32. al alarms during calibration Local BFT 48 alarm relays if equipped are inhibited during CAL MODE CAL MODE automatically exits if no keystrokes are detected after 5 minutes Follow these BFT 48 calibration guidelines e Calibration accuracy is only as good as the calibration gas accuracy Buckeye Detection Systems recommends calibration gases with NIST National Institute of Standards and Technology traceable accuracy to increase the validity of the calibration Do not use a gas cylinder beyond its expiration date Calibrate a new sensor before use Allow the sensor to stabilize before starting calibration approximately 5 minutes Calibrate on a regular schedule Buckeye Detection Systems recommends once every 3 months depending on use and sensor exposure to poisons and contaminants e Calibrate only in a clean atmosphere which is free of background gas Optional Remote Calibration Adapter Splash Guard 10 0198 Optional Cal Cup Process Cover 10 0203 1 2 Liter Min Flow Regulator Figure 4 1 Calibration Gas Input Use the following step by step procedure to perform ZERO and SPAN calibrations 1 To enter the CAL MODE from either data display press the DOWN CAL key and within 5 seconds press the EDIT key 15 DETECTION SYSTEMS BF T 48 Instruction Manual Revision 3 5 2 Using the Cal Cup apply a clean ZERO gas or be sure there is no background target gas in the monitored area After the reading
33. alytic bead and electrochemical sensors obviously have different signal conditioning requirements In addition same sensor types have different response coefficients signal strength and gain and offset requirements The block wiring diagram in Figure 2 11 illustrates how BFT 48 s are able to accept many sensor types without the need of manual potentiometers or jumpers Smart Sensors carry this setup information with each sensor 11 BF T 48 Instruction Manual Revision 3 5 Sensor Volts E Digital Pot Sensor Excitation Switching Power Balance Adjust Digital Pot Supply UO Power Supply Board TB1 3 Wires S 1 Simple Bridge SSES P NES HS E SS I SE Active e des Bridge Amplifier I O Power Supply Bridge Amplifier UO Power Supply Board S1 Ribbon cable Or between I O et T u o DA Analog Switch Analog Digital a Bridge ISS Display Assy Converter ensor Smart Sensor Display Assy 7 Serial Interface _ Common PreAmp Gain Adjust Digital Pots Display Assembly TB2 3 Wires Sense Electrochemical Sensor Amplifier Display Assy Simple Electro chemical Sensor uAmp V Amplifier Reference Counter Or Smart Electro chemical Sensor Smart Sensor Serial Interface Vdd Common Figure 2 11 BFT 48 Block Wiring Diagram SECTION 3 INITIAL START UP 3 1 Transmitter Configuration
34. ccccssseeseesseeeceesseeseenseeeenseeseonsseesoenseeseonees 7 2 9 Alarms RS 485 Modbus BF10 0234 Option Installation cceeeeeseeeeeeeeeeees 8 2 10 Isolated 4 20MA Output 10 0250 Option ee teeeeee eee eeeeeeeeneeeeeeeeeeeeeneeeeeeeeneeenes 10 2 11 Sensor Installation with Smart Simple Sensor Definition cceeeee 10 2 12 Sensor Type and BFT 48 Signal Conditioning sseseeseeeeeeeeeeeeeeeeeeeeeeeeeeees 11 SECTION 3 INITIAL START UP eeeceeeseseeceeeessseneeeeeeeeeeeeseeeeeoeeeesassasneeeeesseeeoooogaeasseenneees 12 3 1 Transmitter Configuration Menu ccccccsssssseeeesecsssseeeeeeeseeeeesseeeeseeeoensneeeeees 12 3 1 1 Single Dual Gas Monitor Configuration ccccesssessseeeeseeeeeeeseeeeeeseeeeeeneeeees 13 3 1 2 Output Zero Output Span Trims Factory Preset Technicians only 13 3 1 3 Ofso E 13 oo a E Real TIME CIOCK EE 13 a a og gt aC 8 e LE 13 3 2 Initial Bridge Sensor Monitor Start Up ccccceessccsssseseeeeeseeeeensneeeeeeseeeeeeneeeees 14 3 2 1 Initial Bridge Sensor Monitor Sensor Volts Check sscceesssesseeeeeeees 14 3 2 2 Initial Bridge Sensor Monitor Balance Check cccccssssssssseeeeeeeeeeeeeees 14 3 2 3 Initial Bridge Sensor Monitor Span Check ccccsssssssseeeeeeeeeesseeeeeeseeeeeeeees 14 3 3 Initial Toxic Oxygen Sensor Monitor Start Up ccceceeeeeeeeeeeeeeeee
35. d be performed to insure proper operation In addition alarm levels Measurement Name ASCII fields and other variables may require attention by users in order to best serve their application 3 3 1 Initial Toxic Oxygen Sensor Monitor Span Check Prior to the initial Routine Sensor Calibration described in section 4 1 a coarse SPAN gas reading verification should be performed after installation Apply an upscale gas value of at least 25 of full scale to the sensor For example if 0 100ppm H2S is the measurement range apply at least 25ppm but not more than 100ppm The indicated value should read within 15 of full scale Remember that this is only a coarse check and precision calibrations are performed in Routine Sensor Calibrations described in the following section 4 1 Section 6 4 describes PREAMP GAIN adjustments that may be required if full scale ranges are changed 14 BF T 48 Instruction Manual Revision 3 5 SECTION A OPERATING INSTRUCTIONS 4 1 Routine Sensor Calibrations Calibration is the most important function for insuring correct operation of the BFT 48 The CAL MODE flow chart shown in Figure 4 2 is designed to make calibration quick easy and error free A successful ZERO and SPAN calibration requires only four keystrokes The 4 20mA output indicates CAL MODE by transmitting 3mA for 2 wire installations and 1 5mA for 3 wire installations It then transmits 4mA during the subsequent CAL PURGE delay to prevent extern
36. d catalytic bead sensors 3 2 2 Initial Bridge Sensor Monitor Balance Check Catalytic bead sensors connect to a bridge circuit that may require a balance adjustment after installation especially when the sensor is remote mounted from the BFT 48 Section 6 2 describes using the LCD to read and adjust BALANCE settings Correct BALANCE setting should be confirmed after start up for locally and remotely mounted catalytic bead sensors 3 2 3 Initial Bridge Sensor Monitor Span Check Prior to the initial Routine Sensor Calibration described in section 4 1 a coarse SPAN gas reading verification should be performed after installation After correct Sensor Volts and BALANCE have been verified apply an upscale gas value such as 50 LEL to the sensor The indicated value should read between 35 and 65 LEL with 50 LEL gas applied Larger errors may indicate incorrect sensor wiring or defective sensor Remember that this is only a coarse check and precision calibrations are performed in Routine Sensor Calibrations described in the following section 4 1 Section 6 4 describes PREAMP GAIN adjustments that may be required if full scale ranges are changed 3 3 Initial Toxic Oxygen Sensor Monitor Start Up BFT 48 Toxic Oxygen Monitors factory equipped with a local Simple or Smart electrochemical sensor rarely require adjustments other than routine calibrations to provide accurate readings However after installation the following checks shoul
37. device Toxic and oxygen monitors are capable of 2 wire 4 20mA operation section 2 7 when the alarms Modbus option and LCD backlight are not required Catalytic LEL sensors or addition of the 10 0234 Alarms Modbus option require the BF10 0233 I O Power Supply board providing 3 wire 4 20mA operation section 2 8 Only periodic calibration checks are needed to assure dependable performance Operator interface is very intuitive with the LCD displaying data both graphically as bar graphs trends and in engineering units Figure 2 1 Additional features include e No potentiometer or jumper settings required All setup is with menus accessed via the LCD magnetic keypad operator interface without opening the enclosure Field adjustable alarm levels may be high low fault fail safe latching and acknowledgeable New alarms cause front LED s to flash and become steady after acknowledge CAL MODE advises when to apply gas during calibrations One half hour trend screen shows rate of change of gas exposures Sensor life bar graph updates after each SPAN calibration Modular design affords efficient installation and plug in sensors allow changing target gases after installation e New smart sensors are recognized by the BFT 48 and prompts users to either upload new configuration data or continue with data from the previous smart sensor e Sensors are industry proven for fast response and long life DETECTION SYSTEMS BF T 4
38. dustry standard electrochemical and catalytic bead sensors for toxic oxygen and LEL combustible gas detection These are referred to as Simple sensors in this manual The BFT 48 design accommodates users wishing to continue use of their existing simple sensors by accepting electrochemical types into TB2 of the BF10 0232 Display Assembly or catalytic bead types into TB1 of the BF 10 0233 I O Power Supply mounted to the bottom of the enclosure The BFT 48 Smart Sensor interface also uses proven electrochemical technology for toxic oxygen and catalytic bead for LEL combustibles BUT has taken this technology a step further A tiny memory IC is incorporated into BFT 48 factory supplied Smart sensors allowing them to contain the entire database of BFT 48 parameters onboard the replaceable Smart Sensor assembly Figure 2 9 This unique Smart Sensor Interface may be used to configure smart sensors and or BFT 48 s from a PC rather than entering all variables via the magnetic keypad Electrochemical and catalytic bead smart sensors both plug into the BF 10 0247 Smart Sensor Head that connects to BFT 48 electronics with its 8 conductor Smart Sensor Interface cable Figure 2 9 CAUTION BF10 0247 Smart sensor heads with electrochemical toxic oxygen sensors must connect to S1 located on the back of the BF10 0232 Display Assembly Figure 2 4 BF10 0247 Smart sensor heads with catalytic bead combustible sensors must connect to S1 located on the optional I
39. e Real value represents float value without the decimal point such as 123 4 is returned as 1234 Decimal Divisor is returned as 1 10 100 or 1000 for decimal position of 1 2 3 or 4 where 123 4 would return the value 10 Chan 1 Cal Zero Real 41001 3 Chan 1 Cal Zero Divisor 41002 3 Chan 1 Cal Span Real 41003 3 Chan 1 Cal Span Divisor 41004 3 Chan 1 Zero Real 41005 3 Chan 1 Zero Divisor 41006 3 Chan 1 Span Real 41007 3 Chan 1 Span Divisor 41008 3 Chan 1 Fault Real 41009 3 Chan 1 Fault Divisor 41010 3 Chan 1 Alarm 1 Real 41011 3 Chan 1 Alarm 1 Divisor 41012 3 Chan 1 Alarm 2 Real 41013 3 Chan 1 Alarm 2 Divisor 41014 3 Chan 1 Alarm 3 Real 41015 3 Chan 1 Alarm 3 Divisor 41016 3 Chan 1 Manual Gain Real 41017 3 Chan 1 Manual Gain Divisor 41018 3 Chan 1 Manual Offset Real 41019 3 Chan 1 Manual Offset Divisor 41020 3 Chan 2 Cal Zero Real 41021 3 Chan 2 Cal Zero Divisor 41022 3 Chan 2 Cal Span Real 41023 3 Chan 2 Cal Span Divisor 41024 3 Chan 2 Zero Real 41025 3 Chan 2 Zero Divisor 41026 3 26 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA BF T 48 Instruction Manual Revision 3 5 Chan 2 Span Real 41027 3 NA Chan 2 Span Divisor 41028 3 NA Chan 2 Fault Real 41029 3 NA Chan 2 Fault Divisor 41030 3 NA Chan 2 Alarm 1 Real 41031 3 NA Chan 2 Alarm 1 Divisor 41032 3 NA Chan 2 Alarm 2 Real 41033 3 NA Chan 2 Alarm 2 Divisor 41034 3 NA Chan 2 Alarm 3 Real 41035 3 NA Chan 2 Alarm 3 Di
40. e values attach a precision milliamp meter to the BFT 48 4 20mA output being used Enter the correct OUTPUT ZERO TRIM menu shown in Figure 3 2 Use the UP DOWN keys to trim the milliamp value to 4 00mA Next enter the correct OUTPUT SPAN TRIM menu and use the UP DOWN keys to trim the milliamp value to 20 00mA Press the NEXT key to exit this menu The BFT 48 stores these new D2A values and uses them as the 0 amp 100 of full scale endpoints WARNING Target gas monitoring and alarm processing are halted during these adjustments OUTPUT ZER TRIM OUTPUT SFAH TRIM lar DFA COUNTS 996 DZA COUNTS UF DOWN to change UF DOWN to change HEST to Exit HEST to Exit Figure 3 2 Output ZERO SPAN Trim Menus 3 1 3 Model Name When power is applied to the BFT 48 it will briefly show a 10 digit ASCII model name or company name as it starts up The name can be edited in the Transmitter Configuration menu by editing the Model field 3 1 4 Real Time Clock Adjust the date and time here for use in EVENT LOGGING This is a factory setting but may need to be adjusted for the end users location 3 1 5 Backlight During high power mode this menu allows the user to turn the backlight off There are three settings ON OFF and TIMED During TIMED mode the backlight will turn on when a key is hit during calibration process and when an alarm is present It will stay on for 15 seconds after any of these events clear 13
41. eeeeeeeeeeeeeeeees 14 3 3 1 Initial Toxic Oxygen Sensor Monitor Span Check ccseeeseseseeeeeeees 14 SECTION A OPERATING INSTRUCTIONS cccceeeeeeeeeeeeeeeeeeeeesnsesnseseeeeeeeeeeeeooeessenseeeees 15 4 1 Routine Sensor Calibrations secwsccisscessoceeesctenesacccennodsavertenectencsavnaccecetecwenivenacentonieveds 15 4 2 ALARM OPERATION ME 16 4 2 1 ALARM 3 UNDERSTANDING FAULT LEVEL OPERATION 00 16 SECTION 5 SETUP MENU CONFIGURATION 0 ccccceeeeeeeeeeeeseeeeeeeeneeeeeeeeeeseesseeeeeeesenennees 17 5 1 Menus Database Configuration ccccsssssssseeeeeeeseceeensneeeeeeseeeensneeeeeseeooensnseeeees 17 5 2 Configuration Using the Magnetic Wand cscccccssssssssseeeessecssesseeeeseeeeensneeeeees 17 5 3 SYSTEM Configuration Menus sxssiesiscciccsdecesitieeresseiivvdaetortesteiieseancdsnrieieiecdiacussiavians 18 Measurement NaMe eege 18 EONO cea eae EEE E 18 FA E 18 EIER 18 OCU e ln CN 18 Cal Span RETTEN 18 Readout DeadDand WEE 18 Cl NGC ET 19 Temp Compensation sssaaa a A aa Daai AEE 19 BC KUD COMO DE 19 PRES TORE C ONTO D 19 Upload Sensor Dala WE 19 eld ANON cairr E EA EE E 19 TA 96n Ti CIE E 20 S54 Alam CUNS so A E E EE 20 5 4 1 Relay Configuration if equipped ccseeeeesceesseseeeeeeseceneesseeeeseeeoeeneeeeees 21 5 5 GHEET i Ce e ue EEN 21 BF T 48 Instruction Manual Revision 3 5 56 CLOCK DELAY EE KE 22 5 7 ECD
42. ers D2A Raw Chan 1 31001 4 NA D2A Raw Chan 2 31002 4 NA Calibrated 10 bit value representing the D2A value of 0 to 1023 for 25 to 105 FS 200 0 amp 1000 100 IMPORTANT READ REGISTERS 31001 31002 TO CREATE READINGS THAT MATCH BFT 48 DISPLAY VALUES THESE SHOULD ALSO BE READ BY BFC 16 MODBUS MASTERS A2D Raw Chan 1 31003 4 NA A2D Raw Chan 2 31004 4 NA 10 bit value representing the A2D value of 0 to 1023 before calibration constants are applied Chan 1 Status 31005 4 NA Chan 2 Status 31006 4 NA 16 bit status words bit assignment for each channel ALARM1_BELOW BITO ALARM2_BELOW BIT1 24 BF T 48 Instruction Manual DETECTION Revision 3 5 sii ALARM3_ BELOW BIT2 ALARM1 _ LATCH BIT3 ALARM2_ LATCH BIT4 ALARM3_ LATCH BIT5 ALARM3_ ACTIVE BIT6 CHANNEL_ DISABLED BIT7 CHANNEL_ CAL BIT8 CHANNEL LINEARIZE BIT9 FAULT RELAY LATCH BIT10 DISPLAY NEGATIVE BIT11 TRANSMIT SENSOR LIFE ENABLED BIT12 Alarm Status Word 31007 4 NA 16 bit status word bit assignment for system status CH1_ALM1 BITO CH1_ALM2 BIT1 CH1_FAULT BIT2 CH2 ALAMI BIT4 CH2 ALM2 BIT5 CH2 FAULT BIT6 K1_STATUS BIT8 K2 STATUS BIT9 K3_ STATUS BIT10 Transmitter Status Word 31008 4 NA 16 bit status word bit assignment for system status CHAN_1_ACTIVE BITO CHAN 2 ACTIVE BIT1 SECURE_LEVEL BIT2 MARKER Tx LED BIT3 K1_FAILSAFE BIT12 K2_FAILSAFE BIT13 K2_ACK BIT14 LOCK BIT15 Chan 1 Sensor Life 31009 4 NA Chan 2 Sensor Life 310
43. he sensor Figure 6 3 Balance is similar to a very coarse ZERO calibration and does not need to be precise since subsequent calibrations will correct for small errors ZERO gas applied to the sensor should provide a Reading of 3 to 3 on the SENSOR BALANCE menu SENSOR BALANCE amp SENSOR VOLTAGE menus are only active when input type Cat Bead 3 Wire SENSOR BALANCE SENSOR WOLTAGE Reading 3 Wolts z d Counts 496 es UPZGH to Change HEST to Exit UP DH to Change WARNING High voltage HET to Exit May damage sensor Figure 6 3 Catalytic Bead BALANCE amp SENSOR VOLTS Adjust Menus 6 3 Set Gain to Unity Technicians only Set Gain to UNITY allows resetting previous calibration OFFSET to zero and GAIN to one This is the definition of UNITY A calibration should be performed after setting UNITY Previous Calibration will be erased EDIT Gain Unity EDIT to confirm NEXT to exit Figure 6 4 Set UNITY GAIN Menu 6 4 PreAmp Gain Adjust Technicians only Depending upon Input Type BF T 48 inputs range from a few micro amps to hundreds of micro amps PreAmp Gain Set is the adjustment that matches the input signal range to the BFT 48 input signal conditioning circuits Altering the PreAmp Gain setting automatically resets previous calibration OFFSET amp GAIN values to UNITY as described in section 6 3 If it is determined the PreAmp Gain
44. id state sensors as well as various millivolts volt and 4 20mA inputs Sensors supplied by the factory include an 8 wire Smart Sensor interface capable of configuration data uploads to the BFT 48 Traditional 3 wire Simple sensors without the smart interface are also supported by the BFT 48 Its advanced microcontroller electronics and superior graphic LCD operator interface offers enhanced diagnostics and fault analysis not possible in competing products The BFT 48 provides a standard 4 20 mA output signal for connection to control systems or other alarm instrumentation Available options include an Alarm Relay RS 485 Modbus board or an Isolated 4 20mA output Non volatile memory retains all configuration data during power interruptions The magnetic non intrusive calibration can be easily performed by one person without opening the enclosure A standard real time clock amp calendar feature allows data logging of calibrations and alarm events for recall to the LCD readout or over the serial port A separate PC compatible USB Interface allows a Smart sensor to be loaded with configuration variables via a PC and upload this data to the BFT 48 This includes alarm set points range target gas calibration constants and other variables required to match the BFT 48 to a specific application For traditional Simple sensors without the smart interface the USB interface allows direct BFT 48 configuration from a PC or a six channel BFT 48 Educator
45. ife set for YES causes the BFT 48 4 20mA output to transmit a sensor life value after successful calibrations during the CAL PURGE delay see section 4 1 Normal operation is the BFT 48 transmits 4mA during the CAL PURGE delay But with TX Sensor Life YES it transmits 4mA for the first 10 seconds then for 5 seconds transmits a value between 4mA and omA with 4mA equal to 0 sensor life and 5mA equal to 100 sensor life see Figure 5 5 The output then returns to 4mA for the remainder of the CAL PURGE delay For example if after a calibration sensor life is 75 the BFT 48 transmits 4 75mA during the 5 second interval Note TX Sensor Life should always be set for NO unless the 4 20mA receiver is capable of interpreting the sensor life signal The Buckeye Fire BFC 16 Controller is capable of this function 4mA for 10 seconds after Cal Exit Then 4 5mA for 5 seconds Sensor Life Value 4mA 0 life 5mA 100 life SE 4mA Monitoring Monitoring Cal Marker Adjustable Calibrating Cal Delay Figure 5 5 Transmit Sensor Life Timing Diagram 5 4 Alarm Settings The Alarm Settings page has the Alarm 1 2 3 Setups Relays and Event Log submenus shown in Figure 5 6 Alarm 1 Alarm 2 and Alarm 3 Fail menus are identical and therefore described only once in this section IMPORTANT Alarm functions and their associated LED s are active without the BF10 0234 Relay Modbus option installed Alarm 1 2 3 menus are identical
46. ilures or out of measurement range conditions However some applications require a third level alarm The A3 menu is identical to A1 amp A2 and may be set to trip at an upscale level value A3 WILL ALSO TRIP WITH MISSING OR FAILED SENSORS REGARDLESS OF THE LEVEL VALUE CAUTION Missing or failed sensors always trip Alarm 3 and relay K3 if equipped This is true even with A3 configured as a level alarm and it must be accepted that A3 level alarm events might be caused by the monitored level or by a missing or failed sensor 16 BF T 48 Instruction Manual Revision 3 5 SECTION 5 SETUP MENU CONFIGURATION 5 1 Menus Database Configuration All BF T 48 configuration variables are stored in its menu database Many menu items will contain default values from the factory and require changes to better match a user s particular application BFT 48 menus may be configured from the magnetic keypad in 5 10 minutes per transmitter For installations consisting of numerous points an interface device is offered to allow Smart sensors and BFT 48 s be configured from a PC s USB port This is useful when BFT 48 s are not yet installed or if a portable computer may be carried to each unit The BFT 48 s configuration menus are shown in Figure 5 1 Pressing EDIT from either data display enters the LEL or EC SETUP PAGE 1 menu 7 D Key Sequence 4 consecutive UP strokes
47. inuous severe mechanical shock e Protect the BFT 48 from dripping liquids and high power sprays e Use only for applications described within this manual CAUTION FOR SAFETY REASONS THIS EQUIPMENT MUST BE OPERATED AND SERVICED BY QUALIFIED PERSONNEL ONLY READ AND UNDERSTAND INSTRUCTION MANUAL COMPLETELY BEFORE OPERATING OR SERVICING ATTENTION POUR DES RAISONS DE SECURITE CET EQUIPEMENT DOIT ETRE UTILISE ENTRETENU ET REPARE UNIQUEMENT PAR UN PERSONNEL QUALIFIE ETUDIER LE MANUE D INSTRUCTIONS EN ENTIER AVANT D UTILISER D ENTRETENIR OU DE REPARER L EQUIPEMENT 1 2 Contacting Buckeye Detection Systems Buckeye Detection Systems 110 Kings Road Kings Mountain NC 28086 1 800 438 1028 bfec buckeyef com BF T 48 Instruction Manual Revision 3 5 SECTION 2 INSTALLATION INSTRUCTIONS 2 1 Introduction Important This manual describes both the 2 Wire and the 3 Wire 4 20mA versions of the BFT 48 2 Wire versions are only possible if the BF10 0232 Display PCB IS THE ONLY PCB IN THE ENCLOSURE If the BF10 0233 I O Power Supply is installed it is a 3 Wire version The BFT 48 is a single or dual channel fixed point monitor designed to provide continuous monitoring of hazardous gases in the workplace Monitored values are displayed in their engineering units as well as graphically as a bar graphs or 30 minute trends Figure 2 1 Input types include Electrochemical toxic oxygen sensors catalytic bead combustible sensors MOS sol
48. ion proof enclosure Loosen the two thumbscrews holding the display assembly in place and remove it A small ribbon cable is attached with sufficient length to access the back of the Display assembly where the Alarms RS 485 Modbus board option is located It is possible to use only the relays only RS 485 or use both Relay terminals are labeled NO normally open NC normally closed and C common or the pole These designators correspond to the shelf or de energized state of the relays The FAULT relay is always failsafe meaning it is energized when there is not a fault condition and therefore its action is reverse of the designators RS 485 Modbus networks should be wired as shown in Figure 2 7 Each BFT 48 connected represents an RTU and must have a unique RTU address RTU addresses are assigned in the Modbus setup menu described in section 4 10 Cabling must be a daisy chain as opposed to a star pattern for reliable operation The end of line unit should have J1 installed in the A position for terminating resistor installation All others should have J1 in the B position Front panel Rx Tx LEDs are helpful troubleshooting tools RS485 2 Wire Network Aer A Gei ay T 2 A dr eeee Address 4 thru n Master B ka tee SS tee KS EE 7 DCS PLC PC Ur Notes i 1 Use Modbus setup menu to set seal Bie eve a unique 2 J1 A installs the terminating resistor amp J1 B omits Install
49. means the UP RESET key RESET key during either data display will set K2 to the normal state EVEN when an Alarm 2 condition exists This is useful for silencing an audible device driven from K2 during the alarm condition K2 Refresh set for ON causes an acknowledged Alarm 2 condition to reactivate K2 if it continues beyond the designated Refresh interval 0 99 minutes This feature insures against forgotten alarms after an Acknowledge 5 5 Sensor Information Sensor Information has the SENSOR SETUP INFO menus shown in Figure 5 8 21 DETECTION SYSTEMS BF T 48 Instruction Manual Revision 3 5 INSTALL NEW SENSOR INSTALL NEW SENSOR SENSOR SETTINGS INFO 4 em B install Sensor gt EDIT to install Historical CAL data Recall Cal History gt New Sensor EDIT Will be Deleted Input Type SMART gt ey New Sensor 01 28 04 Any other key EDIT to Accept Recent Cal 04 05 04 to Exit NEXT to Abort Sensor Life CALIBRATION DATES Record 22 of 22 CAL Date 04 05 04 UP DOWN to scroll NEXT to EXIT SMART SENSOR Type Cat Bead Span 100 Zero 0 XXXXXX Born On 01 28 04 Last Cal 04 05 04 ANY key to Exit Figure 5 8 Sensor Information Menus Install New Sensor should always be performed when a new simple sensor is installed This deletes historical CAL data and sets sensor life to 100 after initial calibration of the new simple sensor The B
50. n Instructions Unscrew the cover on the BFT 48 EC explosion proof enclosure Loosen the 2 thumbscrews holding the display assembly in place and remove it A small sensor cable is attached with sufficient length to allow access to the back of the display assembly where 2 position TB1 is located Route the receiver wires through the conduit entry and connect to TB1 Steering diodes in the BFT 48 EC 2 wire 4 20mA output automatically correct for polarity so positive and negative are interchangeable Reassemble the BFT 48 EC Follow the procedures and recommendations in the receiver manual to complete the installation Be sure the BFT 48 EC enclosure and conduit are properly grounded Apply loop power by appropriately powering the receiver device DCS PLC Controller etc and the BFT 48 EC should function Proceed to section 3 BF T 48 Instruction Manual Revision 3 5 94 is ALARM RS485 Options PCB amp firmware upload socket DISPLAY Assy 10 0232 ALARM MODBUS OPTION S4 Backside of 10 0232 Display Assembly Two Wire 4 20mA sink Polarity 2 WIRE Protected Use only in 2 Wire 4 20mA mode Toxic Oxygen sensors S1 may also be data port for i uploading SEH data Output Not available with Bridge sensor from portable Educator device Non Polar or Alarms Modbus option See manual for more info EC Only SMART EC SENSOR Ribbon to 3 Wire 4 20mA I O Power Supply PCB req d for Bridge b
51. n Menus The System Config group consists of two pages of menus as shown in Figure 5 3 Each item s description follows in this section SYSTEM CONFIG PG 1 SYSTEM CONFIG PG 2 A Baue zur ement Name 16 UP BReadout Deadband 0 Eunits XXXXXXXXXX 10 DOWN Track Negative NO Zero 0 Eunits Temp Compensation Backup Config Restore or Upload i aot re e T without smart sensor installed TX Sensor Life Upload available only 3 with smart sensor installed Span 100 Eunits Decimal Points 0 Cal Span Val 50 Restore available only Figure 5 3 System Config Menus Measurement Name may be edited to contain virtually any 16 character ASCII field It is typically used to describe the monitored point by user tag or other familiar terminology Eunits engineering units may have up to a 10 character ASCII field Many common gases have pre configured Eunits based upon the sensor type and each may be edited in this menu as described in Configuration Using the Magnetic Wand section 5 2 Zero 0 defines the reading to be displayed when 4mA 0 is the BFT 48 output Span 100 defines the reading to be displayed when 20mA 100 is the BFT 48 output The highest reading allowed is 9999 includes negative polarity sign and one decimal point Polarity is only indicated for negative readings Decimal Points sets the resolution of the LCD readings and may be for 0 1 or 2 Example ZERO readings for 0 1 amp 2 DP
52. n equipped with a locally mounted BF 10 0247 Smart Sensor Head Figure 2 9 ARCTIC Smart sensors are available with a 1 watt heater temperature controller for warming the sensor compartment This is important since many electrochemical sensors have a low temperature rating of only 20C If incoming 10 30VDC power is at least 24VDC the ARCTIC option extends BFT 48 operation down to 55C Important ARCTIC BFT 48 s consume more power when it is cold When temperature inside the BF T 48 enclosure is below 25C the 175 ohm BF10 0233 PCB heater is connected across the incoming DC power terminals When an ARCTIC Smart Sensor is installed its 1 watt heater is connected across the BFT 48 s internal 5VDC power supply when Sensor Temp is below the Setpoint see section 7 1 1 These additional loads must be considered when sizing the installation s DC power supply 7 1 1 ARCTIC Smart Sensor Temperature Setpoint Option Both the O2 TOXIC and LEL Current channels see section 3 1 1 are capable of accepting ARCTIC Smart Sensors with 1 watt heater temperature controller circuits ARCTIC sensor temperature controllers have a unique address that is automatically detected by the BFT 48 This activates the Sensor Temp menu on page 2 of the channel s main menu as shown below in Figure 7 1 Selecting Sensor Temp and pressing EDIT opens a window displaying the sensor s current temperature and the 1 watt heater s Setpoint When the Sensor Temp value is below
53. nduit is rigid and able to support the weight of the BFT 48 the mounting bolts may be omitted CAUTION The sensor should never be installed pointing upwards D Housing EES 10 0193 Optional Remote Sensor Housing i p Simple Sensors only l e Smart EC 2 Wire 4 20mA o Sensor TB1 Terminals re Behind Display KE 10 0232 Display Assy ou EC 3 Wire Power Signal Terminals 10 0250 Isolated 10 0234 ModBus 4 20mA Output Option Alarm Option Smart Cat Bead 10 0233 I O Power Sensor Suen df Connector Options mount piggy back to upply req d for l j E ee eeh SS Optional Remote Sensor Wirin 10 0233 I O Power Supply g I Optional Remote Sensor Mounting ooo ok 10 0247 Smart N Sensor Head g Y 10 0198 Optional Remote 10 0203 Optional ATEX compliant model requires Calibration Adapter Cal Cup Process Cover 10 2072 ATEX marked sensor head Splash Guard Figure 2 3 Outline Drawing 2 5 System Design Specifications Supply Voltage 10 to 30 volts Power Consumption e With atypical 5 watt Bridge Sensors requires BF 10 0233 I O Power Supply and 3 wire operation 100 mA nominal 24 VDC e Toxic Oxygen Sensors without Relays Modbus Option wire 4 20mA operation 25 mA max nominal 24 VDC e Relays RS 485 Modbus Option Board requires BF10 0233 I O Power Supply and 3 wire operation 40 mA per relay 120 mA total with all 3 energized RS 485 use adds 2
54. nput Ga 2 I V 3 Wire Amplifier ae ee Se ERE 24VDC Common Ga d UO Power Supply with 4 20mA Input without catbead Order 10 0233 4 20mA TB2 24VDC Gg Microcontroller Electrochemical Sak 4 20mA OUTPUT 4 20mA OUTPUT LR 24VDC Common O Amplifier Field i Wiring gt lt Monitor 10 0233 4 20mA is a special configuration allowing 4 20mA Input to TB1 and is available by special order O g PI D Se ES E NO Power Supply a ra o 40 Of oz QOrre S Assy 10 0233 4 20mA a6 OS X ou ot amp pi SE 88 12 3 4 1 2 3 OOS SO S2 2 Ribbon to Display Assy 4 20mA IN accepts milliamp signal inputs 24VDC COMMON is RETURN rail for TB2 O TB1 both 4 20mA Input and Output ea a See Block Wiring diagram O O Figure 7 3 10 00233 4 20mA Block Wiring Diagram 7 3 1 4 20mA Input Marker Message Technicians only Important BFT 48 Input Marker menus are available only with special 4 20mA input configurations described in sections 7 2 and 7 3 of this manual and when the Input Type menu setting is 4 20mA 3 Wire see section 6 5 Since FAULT alarms are also tripped in the lt 4mA region it is important to understand that the Marker events override the FAULT alarm see section 5 4 Some monitors indicate special modes of operation such as Calibration or Maintenance by transmitting a special lt 4mA Marker value The BFT 48 offers 4 20mA input Marke
55. pped with BF 10 0247 sensor heads are NRTL Nationally Recognized Testing Lab certified as suitable for both intrinsically safe and explosion proof installations BFT 48 EC s equipped with BF10 0247IS sensor heads XP flame arrestor is not installed to allow monitoring of highly reactive gases such as chlorine are NRTL certified as suitable for intrinsically safe installations All BFT 48 EC s are NRTL certified for explosion proof installations as long as the sensor head is CSA certified as explosion proof Contact Buckeye Detection Systems for Installation Drawing BF11 0100 for correct intrinsically safe installations Description The 2 wire current sinking transmitter is the easiest and most economical to install since there are only two wires All of the power needed comes from the current loop and wire sizes may be smaller However only very low power applications are eligible for such transmitters The BFT 48 EC Display assembly shown in Figure 2 4 consumes lt 2 5 mA of quiescent current Toxic and oxygen electrochemical sensors generate their own signals and therefore require no additional current If a 4 20mA output is all that is required for toxic oxygen measurements no LCD backlight alarms or RS 485 the BFT 48 EC may be used in the 2 wire mode CAUTION It is important to understand the receiver or controller device must supply the loop power in 2 wire 4 20mA modes Be sure the receiver to be used supports this type of operatio
56. r menus shown in Figure 7 4 for detecting inputs between 0 and 3 75mA that represent such events Once detected the BFT 48 transmits a constant mA output equal to the Marker value 33 DETECTION SYSTEMS BF T 48 Instruction Manual Revision 3 5 Entering YES in the Marker Active menu also activates Marker TX LED Mark Level and Mark As menus Mark Level allows entering the lt 3 75mA value 2mA to detect Mark As allows entry of the up to 10 digit ASCII message the LCD readout will display when the Marker is detected Marker TX LED menu YES causes the front panel TXD LED see Figure 2 1 to also illuminate when the Marker is detected Important Optional BF10 0234 RS 485 modbus port will not function if Marker TX LED menu must YES TECHNICAL PAGE 2 A B Raw Min Cnts 511 Raw Max Cnts 1000 Figure 7 4 4 20mA Input MARKER Menus A Marker application example is as follows Many gas detection monitors transmit a Cal Marker value of between 1 3mA during their calibration mode Configuring BFT 48 marker menus as shown in Figure 7 4 will provide the LCD readout in Figure 7 5 when 1 5mA is the 4 20mA input In this example the BFT 48EC I 4 20mA output will also transmit a 1 5mA marker signal 0 IN CAL T m Measurement Name Figure 7 5 4 20mA Input Type MARKER Message 34 DETECTION BF T 48 Instruction Manual Revision 3 5 mm REVISION HISTORY Revision 3 4 3 27
57. s 5 10 RS 485 MODBUS SETUP The RS 485 MODBUS SETUP menu allows setting the RTU address if RS 485 equipped for each BF T 48 on the RS 485 network Each BF T 48 must have a different RTU address when communicating on the same 2 wire RS 485 cable The factory default Baud rate is 9600 but can be adjusted to 1200 2400 4800 and 19200 Parity and Stop Bit are fixed at industry standard values of none and 1 Note If Marker TX LED see section 6 8 is selected RS 485 MODBUS SETUP menu is not available because the serial port is no longer active 23 BF T 48 Instruction Manual Revision 3 5 rf RS485 MODBUS SETUP MB RTU Address 1 Baud Rate 9600 Parity None Stop Bit 1 Figure 5 12 Modbus RS 485 Setup Menu 5 10 1 MODBUS REGISTER AND FUNCTION CODE SUMMARY The following table identifies BFT 48 Modbus register locations and function codes Chan 1 designations represent the EC channel while Chan 2 represent the LEL 4 20mA Input channel VARIABLE ALIAS READ FUNCTION CODE WRITE FUNCTION CODE Read Only Discretes Chan 1 Alarm 1 2001 2 NA Chan 1 Alarm 2 2002 2 NA Chan 1 Fault 2003 2 NA Chan 2 Alarm 1 2004 2 NA Chan 2 Alarm 2 2005 2 NA Chan 2 Fault 2006 2 NA K1 2007 2 NA K2 2008 2 NA K3 2009 2 NA Chan 1 Cal Mode 2010 2 NA Chan 2 Cal Mode 2011 2 NA Read Write Coils Alarm Ack Reset 12001 1 5 Note After writing a TRUE to this register it resets back to FALSE automatically Read Only Regist
58. s processing of alarms 4 20mA output values and Modbus RS 485 communications should not be relied upon while editing these menus Back up the current configuration prior to altering any Technical menus in case Restore is required later see section 5 3 The TECHNICIAN ONLY menu group contains items that are factory configured depending upon the type sensor and input connected to the BFT 48 They should not be tampered with after 2 BF T 48 Instruction Manual Revision 3 5 installation If configured incorrectly some items will prevent monitoring of target gases The Set Sensor Voltage menu for setting the catalytic bead sensor excitation voltage could destroy the sensor Access requires a special key sequence of four consecutive UP keystrokes to prevent accidental modification of critical items TECHNICAL PAGE 1 B set Balance EDIT SENSOR BALANCE gt D Set Sensor Voltage gt Reading 3 Set Gain to UNITY gt Counts 496 PreAmp Gain Set gt OO Eef Input Type gt ZERO Cal Val 0 UP DN to Change NEXT to Exit lt i SENSOR BALANCE amp SENSOR VOLTAGE menus are only active when input type Cat Bead 3 Wire m TECHNICAL PAGE 2 A Raw Min Cnts 511 Raw Max Cnts 1000 SENSOR VOLTAGE Volts 2 04 UP DN to Change NEXT to Exit WARNING High voltage may damage sensor xk kK k kk WA RNING k k k k k Previous Calibration will be erased EDIT Gain Unit y ED
59. the zero calibration point by setting this menu item to the desired engineering unit value Do not exceed 25 of full scale 6 7 Raw Min Max Counts Technicians only The Raw Min Max Counts menus determine the range of 10 bit analog to digital A D converter counts that define 0 amp 100 of full scale Raw Min A D counts create 0 readings and Raw Max A D counts create 100 readings These menus are very useful in application with non standard input ranges For example if instead of a standard 4 20mA input 8 18mA must be 30 DETECTION BFT 48 Instruction Manual Revision 3 5 mm accepted by the BFT 48 Set RAW MIN COUNTS to match the 8mA input counts value and RAW MAX COUNTS to match the 18mA input counts value The corresponding Zero 0 and Span 100 readings are entered in the Configuration Menu describe in section 5 3 Live A D count values may be viewed from the CAL MODE Information screen described section 4 1 6 8 4 20mA Input Marker Message Technicians only See section 7 3 1 for description of the 4 20mA Input Marker Message menus This feature is only available with BFT 48EC I 4 20mA input models SECTION 7 SPECIAL ORDER CONFIGURATIONS 7 1 ARCTIC Option BFT 48EC CAT and BFT 48EC 3 wire models may be ordered with a special ARCTIC configuration to include a 175 ohm 4 watt heater temperature controller circuit mounted to the back of the BF10 0233 Power Supply PCB Figure 2 5 In addition whe
60. tiplied to the preamp gain value that is set prior to the initial calibration for each of the specified temperatures 40 C 60 C in 10 increments Offset is the needed adjustment to make the sensor read zero at the different temperatures To prevent accidental data entry a special keystroke sequence of 4 consecutive UP keys is required to enter this menu COMPENSATION Enter Key Sequence to access menu k k k k k B gt T EMP 40 0C GAIN 1 000 NEXT key to Exit offset 0 000 See Manual HELP Figure 5 4 Temperature Compensation Menu Backup Config allows users to store the entire current BFT 48 menu database into non volatile memory for restoration later if incorrect values are accidentally entered or uploaded Restore Config restores the BFT 48 menu database to the values from the most recent Backup Config This menu item is only available if a smart sensor is not installed The special keystroke sequence of 4 consecutive UP keys is also required to perform backup and restore operations Upload Sensor Data allows manually uploading the entire smart sensor database to the BFT 48 from the smart sensor Cal Marker allows setting the 4 20mA output value during ZERO and SPAN calibrations at a level to prevent alarm trips by calibration values 3 Wire models may be set from 0 to 20mA Quiescent current of 2 wire models limits this setting to 3 to 20mA 19 BF T 48 Instruction Manual Revision 3 5 TX Sensor L
61. visor 41036 3 NA Chan 2 Manual Gain Real 41037 3 NA Chan 2 Manual Gain Divisor 41038 3 NA Chan 2 Manual Offset Real 41039 3 NA Chan 2 Manual Offset Divisor 41040 3 NA Binary Cal Data Chan 1 A2D MIN 41041 3 NA Chan 1 A2D MAX 41042 3 NA Chan 1 D2A MIN 41043 3 NA Chan 1 D2A MAX 41044 3 NA Chan 2 A2D MIN 41045 3 NA Chan 2 A2D MAX 41046 3 NA Chan 2 D2A MIN 41047 3 NA Chan 2 D2A MAX 41048 3 NA DETECTION SYSTEMS Min and Max calibration points for the A D and D A converters 5 11 SYSTEM SECURITY The SYSTEM SECURITY menu offers two levels of protection A LOW level allows CAL MODE sensor calibrations but requires the 4 digit Pass Code prior to altering menus HIGH level locks the entire menu database and the CAL Mode until the correct Pass Code is entered LOW and HIGH security levels always allow viewing of configuration menus but they may not be changed Contact Name is a 12 character ASCII field available for displaying a phone or name of personal who know the Pass Code Lost Pass Codes may be recovered by entering the locked security menu and holding the UP key for 5 seconds The 4 digit code appears near the bottom of the screen TC SYSTEM SECURITY B Contact Name Secure Level LOW Pass Code Unlocked Figure 5 13 System Security Menu SECTION 6 TECHNICIANS ONLY MENUS 6 1 Introduction WARNING Users of these menus must have a detailed understanding of their functions Monitoring of target gase

BFT-48 Manual - Buckeye Fire Equipment Company

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