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Emerson Bristol 2808 Series, Инструкция по эксплуатации

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S1400T-2808B 

Page 2-2 

Section 2 - Protection

 

2.2.1

 

Considerations For The Protection of Personnel 

 
Always evaluate the site environment as if your life depended on it. Make sure that you 
understand the physical nature of the location where you will be working. Table 2-1 
provides a general guideline for evaluating an installation site. 

 

Table 2-1 - Installation Site Safety Evaluation Guide 

 

# 

Guide 

1  Indoor or outdoor – Dress Appropriately 
2  If outdoor, what kind of environment, terrain, etc. Watch out for local varmint (bees, 

spiders, snakes, etc.) 

3  If indoor or outdoor – determine if there are any pieces of dangerous equipment or any 

processes which might be a risk to your safety 

4  If in a tunnel, bunker, etc. watch out for a build up of toxic or flammable gases. Make 

sure the air is good. Watch out for local varmint (bees, spiders, snakes, etc.) 

5  Hazardous or Non-Hazardous Environment – Wear appropriate safety equipment and 

perform all necessary safety measures. 

6  Before installing any equipment or power or ground wiring, make sure that there are no 

lethal (life threatening) voltages between the site where the instrument will be installed 

and other equipment, pipes, cabinets, etc. or to earth itself. 

7  Never assume that adjacent or peripheral equipment has been properly installed and 

grounded. Determine if this equipment and a TeleFlow can be touched simultaneously 

without hazard to personnel and/or equipment? 

8  Before embarking to remote locations where there are few or no human inhabitants ask a 

few simple questions like, should I bring water, food, hygienic materials, first aid kit, etc? 
Be Prepared! 

9  Observe the work habits of those around you – for your own safety! 

 

Some of the items that a service person should consider before ever going on site can be 
ascertained by simply asking questions of the appropriate individual. Obviously other 
safety considerations can only be established at the installation site. 
 

2.2.2

 

Considerations For The Protection of Equipment 

 
Always evaluate the site installation/service environment and equipment. Understand the 
various physical interfaces you will be dealing with such as Series 2808 Transmitter 
mounting and supporting, transducer mechanical and electrical connections, analog and 
digital circuits, power circuits, communication circuits and various electrical grounds. Table 
2-2 provides a general guideline for evaluating the equipment protection requirements of an 
installation site. 
 

Table 2-2 - Equipment Protection Site Safety Evaluation Guide 

 

# 

Guide 

Reference Section 

1 

Environment - Class I, Division 2 - Nonincendive 

Environment - Class I, Division 1 - Intrinsically Safe 
Other – Safe or unrated  area 

See Appendix A of CI-3808 

See CI-3530-IStran 
 

2 

Earth Ground - Established by mechanical/electrical or (both) 

or not at all. 

See Section 3 

3 

Is the area prone to lightning strikes? 

See Section 4 

4 

Are there surge suppressors installed or to be installed? 

See Section 4 

Содержание Bristol 2808 Series

Страница 1: ...www EmersonProcess com Bristol Instruction Manual CI 2808B Mar 2007 Series 2808B Series 2808 Transmitter Models 2808 15B 16B 35B ...

Страница 2: ...t to Bristol for repairs or evaluation please note the following The party sending such materials is responsible to ensure that the materials returned to Bristol are clean to safe levels as such levels are defined and or determined by applicable federal state and or local law regulations or codes Such party agrees to indemnify Bristol and save Bristol harmless from any liability or damage which Br...

Страница 3: ...TEND BEYOND THE DESCRIPTION OF THE FACE HEREOF F No agent of Bristol is authorized to assume any liability for it or to make any written or oral warranties beyond those set forth herein REMEDIES A Buyer s sole remedy for breach of any warranty is limited exclusively to repair or replacement without cost to Buyer of any goods or parts found by Seller to be defective if Buyer notifies Bristol in wri...

Страница 4: ... via the Bristol Babcock Web site www bristolbabcock com and sending it via E Mail to brepair bristolbabcock com A BBI Repair Dept representative will return E Mail or other requested method with a RA number C Mail Mail the form GBU 13 01 to Bristol Babcock Inc Repair Dept 1100 Buckingham Street Watertown CT 06795 A BBI Repair Dept representative will return call or other requested method with a R...

Страница 5: ... a separate sheet if necessary 2 Comm interface used Standalone RS 485 Ethernet Modem PLM 2W or 4W or SNW Other ______________ 3 What is the Firmware revision _____________________ What is the Software version Part III If checking replaced for any question below check an alternate option if replacement is not available A If product is within the warranty time period but is excluded due to Bristol ...

Страница 6: ...ull schedule of classes conducted by full time professional instructors Classes are offered throughout the year at three locations Houston Orlando and our Watertown CT headquarters By participating in our training your personnel can learn how to install calibrate configure program and maintain any and all Bristol products and realize the full potential of your system For information or to enroll i...

Страница 7: ...es Many Bristol software products incorporate help screens In addition the software typically includes a read me release notes file detailing new features in the product as well as other information which was available too late for inclusion in the manual Contacting Bristol Inc Directly Bristol s world headquarters is located at 1100 Buckingham Street Watertown Connecticut 06795 U S A Our main pho...

Страница 8: ...com Telephone Support Non Technical Questions Product Orders etc Questions of a non technical nature product orders literature requests price and delivery information etc should be directed to the nearest sales office listed on the rear cover of this manual or to your Bristol authorized sales representative Please call the main Bristol Inc number 860 945 2200 if you are unsure which office covers ...

Страница 9: ...using Rotation 1A 3 1A 5 PRESSURE MEASUREMENT APPLICATIONS 1A 9 Liquid Application 1A 9 Gas Application 1A 9 Steam Application 1A 10 Liquid Level Application 1A 11 1A 6 SERVICE CHECKS 1A 12 1A 7 GP TRANSMITTER SPECIFICATIONS 1A 12 Section 1B DIFFERENTIAL PRESSURE TRANSMITTERS Models 2808 35B 1B 1 PRODUCT DESCRIPTION 1B 1 1B 2 THEORY OF OPERATION 1B 1 1B 3 IDENTIFYING TRANSMITTER OPTIONS 1B 3 1B 4 ...

Страница 10: ... CHECK PROCEDURE 3 4 3 4 CALIBRATION ADJUSTMENTS 3 4 3 5 TYPES OF RANGE CALIBRATION 3 5 3 6 ZERO BASED CALIBRATION 3 8 3 7 ELEVATED ZERO CALIBRATION 3 8 3 7 1 Zero Elevation Example 3 9 3 8 SUPPRESSED ZERO CALIBRATION 3 9 3 8 1 Zero Suppression Example 3 11 3 9 SELECTABLE DAMPING 3 11 Section 4 SERVICE 4 1 GENERAL 4 1 4 2 TROUBLESHOOTING 4 1 4 3 FACTORY REPAIRS 4 1 Section 5 SPECIFICATIONS 5 1 FUN...

Страница 11: ...rotection 5 3 Vibration Effect 5 3 5 4 PHYSICAL SPECIFICATIONS 5 3 Fill Media 5 3 Electronics Housing 5 3 Electrical Connections 5 3 APPENDICES Special Instructions for Class I Division 2 Hazardous Locations Appendix A Loop Powered Indicator Option Appendix B Surge Protector Appendix C Material Safety Data Sheets Appendix Z SUPPLEMENTS Site Considerations for Equipment Installation Grounding Wirin...

Страница 12: ...BLANK PAGE ...

Страница 13: ...rce to operate the signal loop a 2 wire 4 20 mA output Available Voltage Output For low power applications a 1 5 Vdc output is user configurable via an internal jumper Adjustable Ranges Transmitters are provided with coarse switch and fine pot adjustments for range calibration Span is adjustable from 16 to 100 of the upper range limit while zero is adjustable from 600 to 600 of the lower range lim...

Страница 14: ...1 2 Introduction 2808B Figure 1 1 2808 XXB Transmitters ...

Страница 15: ... 1 Where continuous exposure or threat of fire or explosion may be present due to accident or uncommon occurrence Division 2 Where threat of fire or explosion is not normally present and not likely to result from abnormal occurrence Groups A through D Cover various flammable gases and liquids such as ethyl ether vapor gasoline acetone etc 1 4 USING THIS MANUAL Sections 1A through 1B contain inform...

Страница 16: ...BLANK PAGE ...

Страница 17: ...shown in Figure 1A 2 provides a 1 inch flush diaphragm connection Series 2808 Transmitters are offered in ranges from 0 100 inH2O max to 0 5000 psi max A listing of ranges for the Model 2808 15B is given in Table 1A A and for the Model 2808 16B in Table 1A B Because of its compact size and light weight the Transmitter may be installed directly on a process pipe For installations that require other...

Страница 18: ...he isolation diaphragm This pressure produces a strain on the silicon diaphragm A micro diaphragm assembly contains four piezo type strain gauge resistors that are ion implanted on the diaphragm s surface and wired in a bridge configuration The flexing of the diaphragm causes changes of resistance in the bridge A bridge circuit is powered by a constant current supply and produces a millivolt signa...

Страница 19: ...in Section 3 Calibration The Transmitter may be installed using connection supported mounting or the optional mounting bracket as follows Connection Supported Mounting The Transmitter provides a male pressure connection 1 2 inch NPT for model 2808 15B and 1 inch NPT for model 2808 16B which can also be used for mounting purposes Figures 1A 5 and 1A 6 This method of mounting allows the Transmitter ...

Страница 20: ...hat locks the Pressure Transducer to the Transmitter Housing must be removed with a 3mm Hex Wrench Once the Transmitter Housing has been turned to the desired position be sure to replace and tighten the set screw see Figure 1A 4 Figure 1A 4 Transmitter Housing Rotation Diagram ...

Страница 21: ...5000 psi F MOUNTING BRACKET 0 Without Mounting Bracket 1 With Neck Mounted Bracket C DIAPHRAGM CONNECTOR MATERIAL 1 316 Stainless Steel 2 Hastelloy C E G CERTIFICATION any selection 1 UL CUL see Table Note 1 2 CENELEC 0 4 UL CUL see Table Note 2 D FILLING MATERIAL 1 DC200 Silicone Fluid E G H WARNING PLATE any selection 0 None 0 1 1 Russian Without Indication 1 1 1 Russian With Indication Table No...

Страница 22: ...0 Without Flange 1 3 Class 150 Flange 2 3 Class 300 Flange 3 4 Class 150 Flange 4 4 Class 300 Flange C DIAPHRAGM CONNECTOR MATERIAL 1 316 Stainless Steel E G CERTIFICATION any selection 1 UL CUL see Table Note 1 2 CENELEC 0 4 UL CUL see Table Note 2 D FILLING MATERIAL 1 DC200 Silicone Fluid E G H WARNING PLATE any selection 0 None 0 1 1 Russian Without Indication 1 1 1 Russian With Indication Tabl...

Страница 23: ...2808B GP Transmitters 1A 7 Figure 1A 5 Overall Dimensions Model 2808 15B With Neck Type Mounting Bracket ...

Страница 24: ...1A 8 GP Transmitters 2808B Figure 1A 6 Overall Dimensions Model 2808 16B With Neck Type Mounting Bracket ...

Страница 25: ...ude shutoff and drain valves to purge connection lines and the Transmitter Gas Application The gas industry typically measures differential pressure static pressure and other variables associated with gas flow A gas installation could use a GP Transmitter to monitor the static pressure and a DP Transmitter to measure the differential pressure as shown below Figure 1A 9 shows the Transmitters conne...

Страница 26: ...he liquid functions as a buffer and prevents live steam from entering the Transmitter When using liquid filled system the connecting line must be installed in a descending step so that the Transmitter is below the level of the process pipe tap and filling tee this slope will maintain the liquid in the connecting line and prevent it from being drawn into the process pipe Liquid filled lines must al...

Страница 27: ...itting The Transmitter may be installed at below or above the 0 liquid level of the tank If the Transmitter is exactly at the 0 level it may be calibrated directly to the zero base level If it is installed below or above the 0 level a head error will occur This error must be added to the measuring range during calibration otherwise the transmitter output reading will have an offset error Section 3...

Страница 28: ...ection Check for sediment or clogging in the connecting line or at the transmitter connection Check for gas in liquid lines or liquid in gas lines Check zero and span adjustments using calibration test setup Check that shutoff valves are fully open Pressure may be trapped in the connecting line Amplifier board may be defective Check loop wiring for shorts opens grounds or intermittent connections ...

Страница 29: ...el Suffix AB 0 Minumum Range 100 Maximum Range Maximum Working Pressure Offered For Model 2808 15B Offered For Model 2808 16B 13 14 15 20 21 22 23 24 25 26 27 0 17 inH2O 0 50 inH2O 0 67 inH2O 0 4 psi 0 8 psi 0 17 psi 0 50 psi 0 83 psi 0 167 psi 0 500 psi 0 833 psi 0 100 inH2O 0 300 inH2O 0 400 inH2O 0 25 psi 0 50 psi 0 100 psi 0 300 psi 0 500 psi 0 1000 psi 0 3000 psi 0 5000 psi 300 inH2O 900 inH2...

Страница 30: ...BLANK PAGE ...

Страница 31: ...mitter are the electronics housing sensor module and process flanges as noted in Figure 1B 2 An electronics housing encloses the amplifier board and the field wiring terminals as shown in the schematic of Figure 1B 3 A sensor module contains the pressure sensor two sealed fluid systems an overpressure diaphragm and two isolation diaphragms Flanges provide the HI and LO port connections and also fu...

Страница 32: ...1B 2 DP Transmitters 2808B Figure 1B 1 Model 2808 35B Figure 1B 2 Transmitter Assemblies ...

Страница 33: ...uit This circuit uses a 250 ohm load resistor and a 24 V dc power source 4 20 mA amplifier current flowing through the load resistor produces a 1 5 V input signal for the external device Amplifier circuittry includes a fine gain and fine offset potentiometer for performing minor calibration adjustments Transmitters also include internal coarse zero and coarse span switches for more extensive range...

Страница 34: ...316 Stainless Steel 2 Hastelloy c J K MOUNTING Any Selection 0 Without Mounting Bracket 1 1 With Flange Mounted Bracket 2 With Neck Mounted Bracket E FILLING MEDIA 1 DC200 Silicone Fluid H L CERTIFICATION any selection 1 UL CUL see Table Note 1 2 CENELEC 0 4 UL CUL see Table Note 2 D F FLANGE MATERIAL 1 1 316 Stainless Steel 2 2 Hastelloy C 1 3 316 Stainless Steel For Remote Seals Only H L M WARNI...

Страница 35: ...2808B DP Transmitters 1B 5 Figure 1B 4A Overall Dimensions for Model 2808 35B Transmitter With Flange Type Mounting Bracket ...

Страница 36: ...1B 6 DP Transmitters 2808B Figure 1B 4B Overall Dimensions for Model 2808 35B Transmitter With Neck Type Mounting Bracket ...

Страница 37: ...2808B DP Transmitters 1B 7 Figure 1B 4C Dimensions for Model 2808 35B Transmitter With Manifold Adapter Option ...

Страница 38: ...rd arrangement Optional manifold blocks may also be specified Both arrangements are described as follows Standard Process Flange Two process flanges containing the connection ports are assembled to the transmitter The port designations L and H are stamped on the body of the flanges The ports accept 1 4 18 NPT pipe connections on 2 1 8 in centers for connection to the orifice taps or a standard thr...

Страница 39: ...1 4 turn To perform calibration by applying pressure to the flange remove the plug with a 7 16 Hex Wrench and install a 1 4 NPT fitting Be sure to secure both plugs upon completion Warning Both vents may be under high pressure Never loosen them more than 1 4 turn to bleed the lines Secure both vents after bleeding is complete 1B 4 1 Transmitter Housing Rotation Once mounted the Transmitter Housing...

Страница 40: ...1B 10 DP Transmitters 2808B Figure 1B 6 Transmitter Housing Rotation Diagram ...

Страница 41: ...itter a zero differential can be generated by opening the bypass valve and closing both shutoff valves Calibration is covered in Section 3 Gas Application The gas industry typically measures differential pressure static pressure temperature and other variables associated with gas flow Figures 1B 9 and 1B 10 show a Model 2808 35B Transmitter measuring the differential pressure across an orifice pla...

Страница 42: ... result in damage to the Transmitter One method of protecting the Transmitter can be achieved by installing an extended liquid filled connecting line as shown in Figures 1B 11 and 1B 12 The liquid functions as a buffer and prevents live steam from entering the transmitter When using liquid filled system the connecting line must be installed in a descending step so that the Transmitter is below the...

Страница 43: ... 0 tank levels Closed Tank In the closed tank application the HI side of the Transmitter connects to the bottom of the tank while the LO side connects to the top as shown in Figure 1B 15 The Transmitter measures the differential pressure between maximum and minimum tank levels The wet leg in the upper connection provides a liquid head for all measurements below the maximum tank level Closed Tank w...

Страница 44: ... side of the Transmitter Head Error A head error results whenever the transmitter is positioned above or below the minimum 0 measurement level of the tank Head errors will add to or sub tract from the tank zero readings These errors can be corrected during range calibration to obtain the proper output readings See Section 3 for calibration information 1B 6 SERVICE CHECKS General troubleshooting hi...

Страница 45: ...tments using test setup Check that shutoff valves are fully open Pressure may be trapped in the connecting line Check that any bypass valve is fully closed Amplifier board may be defective Check that upstream side of DP device is connected to HI side of transmitter Check loop wiring for shorts opens grounds or intermittent connections Check piping for gas in liquid lines or liquid in gas lines Clo...

Страница 46: ...loy C Electronics Housing Low copper aluminum epoxy finish NEMA 4X rating Mounting Position Effect on Transmitter Accuracy 2 0 inH2O which can be corrected by calibration TABLE 1B C TRANSMITTER RANGES Model Suffix AB Min Range Max Range Working Pressure psi 13 0 17 in H2O 0 100 in H2O 2000 14 0 50 in H2O 0 300 in H2O 2000 20 0 4 psi 0 25 psi 2000 22 0 17 psi 0 100 psi 2000 23 0 50 psi 0 300 psi 20...

Страница 47: ...s Going below the lower temperature limit can also lead to performance or failure problems If temperature extremes are anticipated the Transmitter should be installed in a more favorable en vironment or be provided with other means of protection Caution The Transmitter must always be operated within the temperature range of its wet end and electronic assemblies Prolonged operation under extreme co...

Страница 48: ...nto the Transmitter Explosion proof wiring practices must be followed to prevent flashback through the conduit 2 The cover of the Transmitter must be screwed in hand tight and fully seated The cover must be replaced if it is damaged or shows stripped threads 3 The cover of the unit must always be in place and secured when the Transmitter is powered The cover must never be loosened or removed unles...

Страница 49: ...itional slack will make the connections more manageable and prevent mechanical strain on the terminals 2 4 WIRING OF 4 20mA SIGNAL POWER LOOP The 4 20mA signal power loop can be powered in two ways Figure 2 2 shows the loop powered by the receiving device controller recorder etc while Figure 2 3 shows the loop powered by an external supply In both instances the 4 20mA current flows through a 250Ω ...

Страница 50: ... set the Jumper Block for Current Operation Figure 2 2 Transmitter Wired to Instrument Supply Source 4 20mA Circuit The device may be an indicator recorder tone modulator etc 1 Connect the shield to earth ground or to a shield terminal on the device if so equipped 2 Refer to Figure 3 2 and set the Jumper Block for Current Operation Figure 2 3 Transmitter Wired to External DC Supply 4 20mA Circuit ...

Страница 51: ...nd set the Jumper Block for Voltage Operation Figure 2 4 Transmitter Wired to Instrument Supply Source 1 5V Circuit The device may be an indicator recorder tone modulator etc 1 Connect the shield to earth ground or to a shield terminal on the device if so equipped 2 Refer to Figure 3 2 and set the Jumper Block for Voltage Operation Figure 2 5 Transmitter Wired to External DC Supply 1 5V Circuit ...

Страница 52: ...renced and not passed through a sampling resistor Signal Shielding Use twisted three wire shielded cable covered by insulating material for the signal power wiring For further information regarding signal shielding consult section 2 4 2 6 EFFECTS OF LEAD LOAD RESISTANCE SUPPLY VOLTAGE The total loop resistance consists of the load loop resistor plus the resistance of both conductors in the signal ...

Страница 53: ...cator The graph of Figure 2 8 shows the cable length in feet vs the cable resistance of both con ductors for wire gauges between AWG 14 and AWG 22 For cable runs less than 1000 feet the resistance can be ignored Figure 2 8 Cable Lead Length Vs Total Lead Resistance ...

Страница 54: ...BLANK PAGE ...

Страница 55: ...either the Transmitter must be isolated from the process or the process must be turned off If this is not done a critical process could accidentally be driven into a dangerous region causing damage to equipment and property and injury to persons Note Before starting any test procedures make sure that the Transmitter is firmly anchored in its intended operating position A different mounting positio...

Страница 56: ...moving the end cover accesses the Transmitter s coarse calibration adjustments Once the cover is removed the adjustments appear as shown in Figure 3 2 The 2808 Series Transmitter can be configured for either voltage or current output To change the setting simply change the position of the voltage current jumper JP1 JP8 Note that the field wiring must also change if converting from voltage to curre...

Страница 57: ...2808B Calibration 3 3 Figure 3 2 Calibration Adjustments ...

Страница 58: ...ssure source to 0 If this reading is out of tolerance correct it by turning the A2 adjustment screw clockwise rotation decreases the reading 9 Recheck the 0 and 100 readings Repeat steps 7 and 8 as needed This may need to be done two or three times If errors are still present at full scale pressure recheck the switch settings If the DIP Switch is in the correct configuration proceed to step 10 If ...

Страница 59: ... from Table 3 A Fine Adjustments At full scale pressure adjust A1 so that the output is either 5V or 20mA Then decrease the unit to zero pressure and adjust A2 so that the output is 1V or 4mA The adjustment of A1 should be such that the setting is barely 5V or 20mA i e A small rotation in the opposite direction should result in an immediate decrease in the output voltage If this is not the case th...

Страница 60: ...3 6 Calibration 2808B TABLE 3 A COARSE ZERO SWITCH SETTINGS Elevation ...

Страница 61: ...2808B Calibration 3 7 TABLE 3 B COARSE ZERO SWITCH SETTINGS Suppression ...

Страница 62: ...the sensing element Zero The point within the available pressure range the user defines as a zero pressure reference Pmax Maximum input pressure of a desired range not necessarily the maximum range of the sensing unit Pmin Minimum input pressure of a desired range Theory of Operation The output stage can potentially take a user defined portion of the 0 100 URL pressure input and display it as a co...

Страница 63: ...Example see Table 3 A A DP Sensor is mounted across an orifice plate to measure gas flow Full scale differential pressure is 40 H2O in either direction 40 H2O The span is 40 40 80 H2O If a 100 Transmitter is used the Coarse Span Rotary Switch SW1 setting is found by dividing the span 80 H2O by the Transmitter s range in this case 100 H2O i e 80 100 80 Therefore the SW1 should be set to position 2 ...

Страница 64: ... Transmitter output is not 5 000V 20 00mA adjust A1 to make a minor correction 5 Lower the input pressure to Pmin Adjust A2 to set the output to 1 000V 4 00mA 6 Recheck the Transmitter output with 0 and 100 inputs The DMM should provide respective readings of 1 000V 4 00mA and 5 000V 20 00mA 0 15 full scale 7 If necessary repeat the A1 and A2 adjustment procedures 8 If problems persist recheck the...

Страница 65: ... set to its SW1 8 position set the value of the Coarse Zero Switch S1 to either 80 00001100 or 90 00001010 or to a binary value between the two e g 00001011 85 Use Fine Adjustment Screw A2 to set 1 000V 4 00mA 42 8 psi and use Fine Adjustment Screw A1 to set 5 000V 20 00mA 53 5 psi Note When Zero Suppression is used the maximum applied pressure may be up to 125 of the URL 3 9 SELECTABLE DAMPING Th...

Страница 66: ...BLANK PAGE ...

Страница 67: ...2 TROUBLESHOOTING Some troubleshooting procedures will require that you use a digital multimeter DMM to measure the loop current Connect the DMM across the V and terminals of the Transmitter as shown in Figure 4 1 and set it to its milliampere function This method of connection will not disturb the signal power loop The DMM reading will be proportional to the input pressure and cover a range of 4 ...

Страница 68: ...4 2 Service 2808B Figure 4 1 Using Internal TEST Terminals to Measure Current ...

Страница 69: ...put two wire analog ISA 50 1 Type Class U2 Current limited to 28 mA max Minimum current is 2 to 3 5 mA Voltage Mode Supply Voltage 6 42 Vdc Reverse polarity protected to 90 Vdc Supply Current 2 1 mA nominal Output 1 5 Vdc 3 wire Calibration Adjustments Span Adjustment Adj Range is 16 to 100 URL Coarse Span set by Rotary switch package Fine Span set via 25 turn pot Zero Adjustment Adj range is 600 ...

Страница 70: ...e Long Term Stability At constant conditions 0 25 of URL 6 mo Ambient Temperature Effect Total including Zero Span 0 010 of URL per F from 25 to 75 F 0 015 of URL per F from 75 to 185 F 0 020 of URL per F on 100 inH2O only Power Supply Effect 005 Vdc Ripple and Noise In accordance with ISA 50 1 Section 4 6 5 3 ENVIRONMENTAL SPECIFICATIONS Temperature Limits Wet End using DC 200 Fill 40 to 220 F 40...

Страница 71: ...ion Bipolar differential surge 1000 watts for 1 ms without digital indicator option May be used with purchased surge protector for additional protection for non hazardous non approved installations only Vibration Effect Less than 0 1 of URL for 10 to 500 Hz at 1 g on any axis Meets SAMA PMC 31 1 5 4 PHYSICAL SPECIFICATIONS Fill Media DC 200 Silicone Electronics Housing Low copper aluminum epoxy fi...

Страница 72: ...BLANK PAGE ...

Страница 73: ...ument 2 Wiring must be performed in accordance with Class I Division 2 wiring methods as defined in Article 501 4 b of the National Electrical Code NFPA 70 for installations within the United States or as specified in Section 18 152 of the Canadian Electrical Code for installation in Canada 3 Models equipped with the Loop Powered Indicator Option Appendix B are approved for use in Class I Division...

Страница 74: ...BLANK PAGE ...

Страница 75: ...Issue 03 2007 Bristol Inc Appendix B For Instruction Manual CI 2808B LOOP POWERED INDICATOR OPTION Pt No 621498 01 7 TB2 1 PSI ...

Страница 76: ...on 2 INSTALLATION OPERATION SERVICE 2 1 INSTALLATION REMOVAL REPLACEMENT OF THE LPI 3 2 1 1 Installation Removal of the Loop Powered Indicator 3 2 2 FIELD WIRING 7 2 3 OPERATIONAL DETAILS 7 2 3 1 Configuring the Loop Powered Indicator 7 2 3 2 Accuracy and Decimal Point Settings 10 2 3 3 Displaying Current Using the LPI 10 2 3 4 Error Conditions 11 2 3 4 1 Conversion and Display Error Conditions 11...

Страница 77: ...protection Over current protection 1 1 2 Hardware Circuit Overview The LPI option uses a micro controller with integral LCD display drivers The current flowing through the LPI is sampled and converted to a corresponding digital word Based on user configuration the digital value is displayed in engineering units along with a unit label The 41 2 digit display can show numeric values as large as 1999...

Страница 78: ...into the Model 2808 Transmitter by connecting the transmitter s terminal block to the spade fingers integral to the Meter Motherboard and installing the mounting screws through the Meter Motherboard to the cast in mounting bosses in the transmitter housing The customer cable is then connected to the compression type terminals of Terminal Block TB1 on the Meter Motherboard Finally the Meter Display...

Страница 79: ...ttempt to install or remove any components PCBs or Field Wiring while the unit is running Doing so can cause sudden electrical transients or imbalances that are capable of causing damage to the module or component in question as well as other associated circuit boards Always turn off ANY Transmitter to Instrument circuits at the instrument or External DC Power Source before changing or adding any ...

Страница 80: ...ve the three 3 Field Wiring Screws Clamps from the Model 2808 Transmitter s Terminal Block 6 Secure the Meter Motherboard to the Model 2808 Transmitter via the three 3 Field Wiring Screws Clamps removed in step 5 Using two 2 4 M F Shoulder Standoffs secure the Motherboard to the Standoffs installed in step 3 7 Install the Meter Display Board onto the Meter Motherboard after aligning the ap propria...

Страница 81: ...Appendix B Page 5 Loop Powered Indicator Figure 2 2 Loop Powered Indicator Installation Diagram ...

Страница 82: ...isplay Cover Assembly with size 149 O Ring onto the Transmitter see Figures 2 3 2 4 Lubricate O Ring with Dow Corning Silicone Grease Compound 4 or equivalent prior to assembly Lubricate threads with NEVER SEEZ Pure Nickel Special or equivalent prior to assembly Tighten until Cover contacts the Transmitter Housing no torque required Figure 2 3 Model 2808 Display Cover Assembly Figure 2 4 Model 280...

Страница 83: ... OPERATIONAL DETAILS 2 3 1 Configuring the Loop Powered Indicator Configuration involves selecting an engineering unit called the Base Unit or BU and then establishing Zero and Full scale values to be used when converting current into that unit The Mode left hand and Select right hand buttons are used to configure the LPI The LPI ships from the factory with a configuration that displays the flowin...

Страница 84: ... will be all blank except for a small lower case letter u located in the upper half of the rightmost digit The label of the previously configured engineering unit will be blinking Remember that the previous engineering unit label is only blinking as a convenient starting point in order to remain in effect it must be selected again unless another unit will be chosen If the previously configured BU ...

Страница 85: ...eft of the rightmost digit As the Mode button is pressed the blinking decimal point will shift to the left in the display and eventually wrap around to repeat the simultaneous display of locations 2 and 5 Press the Select button to make the blinking decimal point location active and move to the configuration of Full scale When the Zero decimal point is selected the SET LO legend will disappear and...

Страница 86: ...00 Up 1 100 Up 0 1 to 1999 9 10 Up 01 10 Up 0 01 to 199 9 1 Up 001 1 Up 0 001 to 19 999 1 Up 0001 1 Up 0 0001 to 1 9999 As indicated in Table 2 1 the display will suppress leading zeros but always show one zero to the left of the decimal point where possible 2 3 3 Displaying Current Using the LPI In Run mode the LPI converts the flowing current into a value displayed in the selected Base Unit BU T...

Страница 87: ...conditions can occur that cause dashes to be displayed The first is a cannot display condition that can occur when the number to be shown is too large to fit in the LCD display This can occur for example if the Full scale value was set as 19 999 equivalent to 20 mA When the input current exceeds 20 mA a value of 20 000 or larger cannot be displayed in this case the display will show four dashes Th...

Страница 88: ...nts of IEC 801 2 for ESD withstand capability up to 10KV EMI Compatibility Designed to coexist inside the aluminum housing with the 2808 electronics EMI radiation is insignificant and susceptibility is comparable or superior to associated electronics Approvals UL approved for use in the following hazardous locations Nonincendive for Class I Div 2 Groups A B C D Explosion proof for Class I Div 1 Gr...

Страница 89: ...ins the internal current at a low level The Transient Surge Protector is wired as shown in the illustration The end having the three wire leads red black and green will screw into one of the 1 2 inch NPT conduit openings of the Ttransmitter The red lead connects to SIGNAL black to SIGNAL and green to the green grounding screw The earth ground lead should also be connected to the grounding screw Th...

Страница 90: ...BLANK PAGE ...

Страница 91: ...n Standard 29 CFR 1910 1200 This standard must be consulted for specific requirements Material Safety Data Sheets are provided in the order listed in Table Z 1 below TABLE Z 1 MSDS for Series 2808 Transmitters Instruction Manual CI 2808B Manufacturer General Description Bristol Part Number or Media Notes Dow Corning Silicone 200 R Fluid 100 CST Pressure Transducer Media Fill ...

Страница 92: ...BLANK PAGE ...

Страница 93: ...in the OSHA Hazard Communication Standard 3 EFFECTS OF OVEREXPOSURE Acute Effects Eye Direct contact may cause temporary redness and discomfort Skin No significant irritation expected from a single short term exposure Inhalation No significant effects expected from a single short term exposure Oral Low ingestion hazard in normal use Prolonged Repeated Exposure Effects Skin No known applicable info...

Страница 94: ...small fires use carbon dioxide CO2 dry chemical or water spray Water can be used to cool fire exposed containers Fire Fighting Measures Self contained breathing apparatus and protective clothing should be worn in fighting large fires involving chemicals Use water spray to keep fire exposed containers cool Determine the need to evacuate or isolate the area according to your local emergency plan Unu...

Страница 95: ...the cleanup of releases You will need to determine which federal state and local laws and regulations are applicable Sections 13 and 15 of this MSDS provide information regarding certain federal and state requirements Note See section 8 for Personal Protective Equipment for Spills Call Dow Corning Corporation 989 496 5900 if additional information is required 7 HANDLING AND STORAGE Use with adequa...

Страница 96: ...tion toxicity please refer to the guidance document regarding the use of silicone based materials in aerosol applications that has been developed by the silicone industry www SEHSC com or contact the Dow Corning customer service group 9 PHYSICAL AND CHEMICAL PROPERTIES Physical Form Liquid Color Colorless Odor Characteristic odor Specific Gravity 25 C 0 965 Viscosity 100 cSt Freezing Melting Point...

Страница 97: ...very low water solubility of this product standard OECD protocols for ready and inherent biodegradability are not suitable for measuring the biodegradability of this product The product is removed 80 during the sewage treatment process Environmental Effects Toxicity to Water Organisms Based on analogy to similar materials this product is expected to exhibit low toxicity to aquatic organisms Toxici...

Страница 98: ...ipment IMDG Not subject to IMDG code Air Shipment IATA Not subject to IATA regulations Call Dow Corning Transportation 989 496 8577 if additional information is required 15 REGULATORY INFORMATION Contents of this MSDS comply with the OSHA Hazard Communication Standard 29 CFR 1910 1200 TSCA Status All chemical substances in this material are included on or exempted from listing on the TSCA Inventor...

Страница 99: ... Know Law present New Jersey CAS Number Wt Component Name 63148 62 9 60 0 Polydimethylsiloxane Pennsylvania CAS Number Wt Component Name 63148 62 9 60 0 Polydimethylsiloxane 16 OTHER INFORMATION Prepared by Dow Corning Corporation These data are offered in good faith as typical values and not as product specifications No warranty either expressed or implied is hereby made The recommended industria...

Страница 100: ...BLANK PAGE ...

Страница 101: ...IRING Bristol Inc Series 2808 Transmitters XXB Series 2808 Transmitters XXB Supplement Guide S1400T 2808B Supplement Guide S1400T 2808B Issue 03 2007 A Guide for the Protection of Site Equipment Personnel In the Installation of Series 2808 XXB Instrumentation ...

Страница 102: ...ETY CONSIDERATIONS 2 3 Section 3 GROUNDING ISOLATION 3 1 POWER GROUND SYSTEMS 3 1 3 2 IMPORTANCE OF GOOD GROUNDS 3 1 3 3 EARTH GROUND CONNECTIONS 3 1 3 3 1 Establishing a Good Earth Ground 3 2 3 3 1 1 Soil Conditions 3 2 3 3 1 2 Soil Types 3 3 3 3 1 3 Dry Sandy or Rocky Soil 3 4 3 3 2 Ground Wire Considerations 3 5 3 3 3 Other Grounding Considerations 3 6 3 4 ISOLATING EQUIPMENT FROM THE PIPELINE ...

Страница 103: ...Lightning Arresters Surge Protectors 5 4 5 2 10 Secure Wiring Connections 5 5 REFERENCE DOCUMENTS 1 IEEE Recommended Practice for Grounding of Industrial and Commercial Power Systems ANSI IEEE Std 142 1982 2 IEEE Guide for the Installation of Electrical Equipment to Minimize Electrical Noise inputs to Controllers from External Sources IEE Std 518 1982 3 Lightning Strike Protect Roy B Carpenter Jr ...

Страница 104: ...sh in the protection of site installations and how to satisfy the defined requirements is presented Additionally this section provides considerations for the protection of personnel and equipment Section 3 Grounding Isolation Construction of the Series 2808 XXB Transmitter with respect to grounds isolation and electrical considerations is discussed Information pertaining to what constitutes a good...

Страница 105: ...nd equipment in question the operational integrity of the equipment and system will be enhanced Understanding what is required to properly install BBI equipment in various en vironments safely and in accordance with good grounding isolating and equipment protection practices goes a long way toward maintaining a system which is healthy to the owner and customer alike Properly installed equipment is...

Страница 106: ...taneously without hazard to personnel and or equipment 8 Before embarking to remote locations where there are few or no human inhabitants ask a few simple questions like should I bring water food hygienic materials first aid kit etc Be Prepared 9 Observe the work habits of those around you for your own safety Some of the items that a service person should consider before ever going on site can be ...

Страница 107: ...ower ground communication or process control I O wiring can have potentially devastating effects on site equipment the process system and or personnel Don t assume that it is safe to touch adjacent equipment machinery pipes cabinets or even the earth itself Adjacent equipment may not have been properly wired or grounded may be defective or may have one or more loose system grounds Measure between ...

Страница 108: ...heir stated accuracy over long periods of time with minimum attention Since many system sites are unmanned and located in remote areas failures resulting from an improperly grounded system can become costly in terms of lost time and disrupted processes A properly grounded system will help prevent electrical shock hazards resulting from contact with live metal surfaces provide additional protection...

Страница 109: ...hown in Figure 3 1 Number 4 AWG solid copper wire should be used for the ground wire The end of the wire should be clean free of any coating and fastened to the rod with a clamp This ground connection should be covered or coated to protect it from the weather and the environment Figure 3 1 Basic Ground Rod Installation 3 3 1 1 Soil Conditions Before installing a ground rod the soil type and moistu...

Страница 110: ...uld be tested on a regular basis to preserve system integrity Figure 3 2 Basic Ground Bed Soil Test Setup Figure 3 2 shows the test setup for Good Soil conditions If the Megger reads less than 5 ohms the ground is good The lower the resistance the better the earth ground If the Megger reads more than 10 ohms the ground is considered poor If a poor ground is indicated one or more additional ground ...

Страница 111: ...sists of four or more 10 foot long electrodes stacked vertically and separated by earth Figure 3 5 shows the construction of a Poor Soil Ground Bed For some poor soil sites the ground bed will be constructed of many layers of Capacitive Couplings as illustrated In extremely poor soil sites one or more 3 by 3 copper plates 12 gauge or 1 16 thick will have to be buried in place of the electrodes Fig...

Страница 112: ...er screen is preferred for these installations along with regular applications of salt water Rocky soil can pose many grounding problems A counterpoise or copper plate will probably be required Constructing a trench at the grounding site and mixing the fill with a hygroscopic salt such as calcium chloride may help for a time Soaking the trench with water on a regular basis will maintain conductivi...

Страница 113: ...ends of the units Earth Ground Cable must be free of any coating such as paint or insulated covering as well as any oxidation The connecting point of the Ground Rod or AWG 0000 Ground Cable must also be free of any coating and free of oxidation Once the ground connection has been established at either the Ground Rod or Ground Cable it should be covered or coated to protect it from the environment ...

Страница 114: ...2 Meter Runs With Cathodic Protection Dielectric isolators are available from Bristol Babcock and are always recommended as an added measure in isolating the 2808 35B Differential Pressure Transmitter from the pipeline even though the 2808 Transmitter s circuitry does provide 600V galvanic isolation from the pipeline and should not be affected by cathodic protection or other EMF on the pipeline 28...

Страница 115: ...e vertical 2 inch pipe The ground conductor connects between the units green Chassis Ground Screw and a known good earth ground Connect the case of an associated RTD to the known good earth ground If the mounting 2 inch pipe is in continuity with the pipeline it will have to be electrically isolated from the 2808 35B Transmitter Use a strong heat shrink material such as RAYCHEM WCSM 68 22 EU 3140 ...

Страница 116: ...Section 3 Grounding Isolation Page 3 9 S1400T 2808B Figure 3 9 2808 35B MVT Remote Installation with Cathodic Protection ...

Страница 117: ... object I2 x R Fifty percent of all lightning strikes will have a first impulse of at least 18 KA ten percent will exceed the 60 KA level and only about one percent will exceed 120 KA 4 1 1 Chance of Being Struck by Lightning The map of Figure 4 1 shows the average annual number of thunderstorm days Isokeraunic level for the various regions within the continental U S A This map is not representati...

Страница 118: ...Chart 2 I A LAT B 5 8 25 170 10 26 30 200 20 85 35 236 30 169 40 280 40 275 45 325 50 402 60 548 70 712 Note for these charts 80 893 I Thunderstorm Days Per Year Isokeraunic Number 90 1069 A Stroke activity for associated Isokeraunic Area 100 1306 B Height Stroke coefficient for associated latitude For Example On Long Island New York Isokeraunic number 20 Chart 1 gives A to equal 85 The latitude i...

Страница 119: ...ement regardless of whether this grounding technique is used I O protectors are used for power lines and telephone lines even those these don t feed into a 2808 Transmitter and also to minimize EMI pick up from a strike Ideally it is best to place all I O protectors on a common panel that has a low inductance path to the ground system 2808 Transmitters would then have a single ground point from it...

Страница 120: ...rrent high voltage gas discharge bulb has a relatively slow response time and only fire when their gas has been ionized by high voltage The second line of defense is the Surge Protector which is made of solid state devices fires very quickly and conducts low voltages and currents to ground Lightning Arresters are applied to circuits as follows i Equipment or circuits that can be exposed to lightni...

Страница 121: ...ors away from signal wiring according to NEC Rules Rule 8 Use appropriately sized wires as required by the load Rule 9 Use lightning arresters and surge protectors Rule 10 Make sure all wiring connections are secure 5 2 1 Common Returns Use of common returns on I O wiring is one of the most common causes of obscure and difficult to troubleshoot control signal problems Since all wires and connectio...

Страница 122: ...ielded Pair Wiring with Overall Insulation For all field I O wiring the use of twisted shielded pairs with overall insulation is highly recommended This type of cable provides discrete insulation for each of the wires and an additional overall insulated covering that provides greater E M I immunity and protection to the shield as well ...

Страница 123: ...ns must utilize smoothly dressed large wire Use AWG 4 solid copper wire with as short a length as possible Exercise care when trimming the insulation from the wire ends Twists the strands tightly trim off any frizzes and tin the ends with solder The earth ground wire should be clamped or brazed to the Ground Bed Conductor that is typically a standard AWG 0000 copper cable The earth ground wire sho...

Страница 124: ...the resistance of the field wires Circular Mills x Length you should be able to calculate the load voltage Conversely if you know the minimum load voltage and current you should be able to derive the maximum voltage loss that is allowable due to line resistance and then the correct wire size Referring to Figure 5 2 a relay that is picked by 100 mA with a loop supply voltage of 24V and a total line...

Страница 125: ...ompression type terminals and site vibrations After a while these compression screws have a tendency to become loose Part of a good maintenance routine should be to check and tighten all screws associated with wiring terminal connections Avoid nicking the wire s when stripping insulation Remember nicked conductors will lead to future problems Also remember to provide some cabling slack and strain ...

Страница 126: ...merson Electric Co Trademarks or copyrighted products mentioned in this document are for information only and belong to their respective companies or trademark holders Copyright c 2007 Bristol Inc 1100 Buckingham St Watertown CT 06795 No part of this manual may be reproduced in any form without the express written permission of Bristol Inc Emerson Process Management Bristol Inc 1100 Buckingham Str...

Страница 127: ...ESDS Manual S14006 4 15 92 CARE AND HANDLING OF PC BOARDS AND ESD SENSITIVE COMPONENTS BRISTOL BABCOCK ...

Страница 128: ...BLANK PAGE ...

Страница 129: ...andled These kits are designed to remove any existing static charge and to prevent the build up of a static charge that could damage a PC board or ESD sensitive components The typical anti static field kit consists of the following components 1 A work surface 10mm conductive plastic sheet with a female snap fastener in one corner for ground cord attachment 2 A 15 foot long ground cord for groundin...

Страница 130: ...results in complete failure of the PC board or component This kind of damage is relatively simple although often expensive to remedy by replacing the affected item s The second kind of damage results in a degradation or weakening which does not result in an outright failure of the component This kind of damage is difficult to detect and often results in faulty performance intermittent failures and...

Страница 131: ...of their static shielding bags ESD sensitive components shall neverbe placed over or on a surface which has not been properly grounded 3 ESD sensitive components shall be handled in such a way that the body does not come in contact with the conductor paths and board components Handle ESD sensitive components in such a way that they will not suffer damage from physical abuse or from electric shock ...

Страница 132: ... before removing or inserting comb connectors plugs or removing and reinstalling PC boards or ESD sensitive components from card files or mounting hardware Follow the power down procedure applicable to the system being serviced 8 Handle all defective boards or components with the same care as new compo nents This helps eliminate damage caused by mishandling Do not strip used PC boards for parts Sh...

Страница 133: ...serves to protect the equipment as well as the worker As a safety feature a resistor usually of the one megohm 1 2 watt current limiting type has been installed in the molded caps of the wrist strap cord and the ground cord This resistor limits current should a worker accidently come in contact with a power source Do not remove the molded caps from grounded cords If a cord is damaged replace it im...

Страница 134: ...ace on a convenient surface table or floor Omit this step if the table or floor has a built in ESD safe work surface 2 Attach the ground cord to the work surface via the snap fasteners and attach the other end of the ground cord to a reliable ground using an alligator clip 3 Note which boards or components are to be inserted or replaced 4 Power down the system following the recommended power down ...

Страница 135: ...s disconnected This assures protection from electrostatic charge in case the work surface is located beyond the reach of the extended ground cord NOTE ALL RESISTORS 1M 10 1 2W Ω FLOOR OF BUILDING EARTH GROUND A B C D E F G R R R R A Chair with ground optional B ESD protective floor mat optional C Wrist strap D ESD protective trays etc E Ionizer F Other electrical equipment G Workbench with ESD pro...

Страница 136: ...board connectors are covered with a very fine gold plate Do not use any abrasive cleaning substance or object such as a pencil eraser to clean connectors Use only the approved cleaner lubricants specified in the procedure following WARNING Aerosol cans and products are extremely combustible Contact with a live circuit or extreme heat can cause an explosion Turn OFF all power and find an isolated a...

Страница 137: ...nt and leaves a protective film to guard against corrosion Improves performance and reliability Extends the life of the contacts Is nonconductive and is safe for use on most plastics e Clean the comb contacts using a lint free wiping cloth f Lightly mist all comb contacts again with Inhibitor NOTE Do not use so much Inhibitor that it drips g Repeat the above procedure for the other PC boards from ...

Страница 138: ... Remove any excess spray by shaking the connector or wiping with either a toothbrush or a lint free wiping cloth 6 Completion 1 Replace any parts that were removed 2 Make sure that the component cover is secure 3 Return the system to normal operation 4 Check that the component operates normally ...

Страница 139: ...BLANK PAGE ...

Страница 140: ...ic Co Other trademarks or copyrighted products mentioned in this document are for information only and belong to their respective companies or trademark holders Copyright c 2006 Bristol Inc 1100 Buckingham St Watertown CT 06795 No part of this manual may be reproduced in any form without the express written permission of Bristol Inc Emerson Process Management Bristol Inc 1100 Buckingham Street Wat...

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