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Honeywell 854 ATG Series, Инструкция по эксплуатации

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Introduction 

 

 

 

 
 

Instruction manual 854 ATG 

 

Page 7 

1.1  Principle of measurement 

 

 

Figure 1.1   Principle of measurement 
 
The principle is based on detection of variations in the buoyancy of a displacer. The displacer is suspended from 
a strong, flexible measuring wire which is stored on a precisely grooved measuring drum. 
The shaft of the drum is connected to the stepper motor via a magnetic coupling. 
 
The apparent weight of the displacer is measured by a force transducer. The actual output of the force 
transducer is compared with a desired value for the apparent weight of the displacer. If a discrepancy exists 
between measured and desired value, an advanced software control module adjusts the position of the stepper 
motor. 
 
 

1.1.1 Level measurement 

 
A level variation of product, in which the displacer is partially immersed, causes a change in buoyancy, which will 
be detected by the force transducer. The resulting difference between measured and desired value will cause a 
variation in the position of the stepper motor and consequently raise or lower the position of the displacer until 
the measured value equals the desired value. 
 
To avoid oscillations, a certain hysteresis and integration time is software adjustable. This results in a stable and 
accurate averaged level measurement. 
 
The stepper motor turns one revolution for every 10 mm of vertical movement of the displacer.  
One revolution is divided into 200 steps, therefore one step is equivalent to 0.05 mm. This resolution is direct 
consequence of the stepper motor principle. The correct functioning of the stepper motor is continuously 
checked. This is achieved by decoding the unique pattern of an encoder disk mounted on the motor shaft. 
 
 

1.1.2 Interface between two products 

 
Measurement of the interface between two products is achieved by sending an interface command to the gauge. 
This causes the stepper motor processor to move the displacer to a position where the apparent weight of the 
displacer matches a pre-programmed set point. 
 
 

Содержание 854 ATG Series

Страница 1: ...Instruction manual Series 854 ATG level gauge ...

Страница 2: ......

Страница 3: ...truction manual series 854 ATG level gauge September 2013 Part no 4416 220 Revision 8 Enraf B V P O Box 812 2600 AV Delft Netherlands Tel 31 15 2701 100 Fax 31 15 2701 111 E mail hfs tac support honeywell com Website www honeywellenraf com ...

Страница 4: ...rmation only The contents descriptions and specifications are subject to change without notice Enraf B V accepts no responsibility for any errors that may appear in this manual The warranty terms and conditions applicable in the country of purchase in respect to Enraf B V products are available from your supplier Please retain them with your proof of purchase ...

Страница 5: ...Other features such as level alarm outputs analog level output temperature measurement pressure measurement etc are describes in separate manuals For an overview refer to the list of related documents in Appendix F Legal aspects The information in this manual is copyright property of Enraf B V Netherlands Enraf B V disclaims any responsibility for personal injury or damage to equipment caused by D...

Страница 6: ...1 Introduction into programming 14 3 3 2 Apply power to the 854 ATG 16 3 3 3 Selecting dimension and decimal separator 17 3 3 4 Tank and gauge data 18 3 3 5 Alarm settings 20 3 3 6 Ullage readout 21 3 3 7 Display control and password protection 22 3 4 Level calibration 23 3 4 1 Standard level calibration 23 3 4 2 Level calibration with a tank top reference stop 23 3 4 3 Level calibration using the...

Страница 7: ...he electronic compartment 42 5 4 3 Replacing software 43 5 4 4 Initializing NOVRAM 43 5 5 Calibrating force transducer 44 5 6 Synchronizing the reference encoder 45 6 Trouble shooting 46 6 1 Problems with displacer movement 46 6 2 XPU error code item EP 47 6 3 SPU error code item ES 47 6 4 SPU status request item QS 48 Appendix A Article and part numbers 49 Appendix B Additional information on dis...

Страница 8: ...itters for vapour pressure measurement HIMS density measurement Analog 4 20 mA level output The above functions are separately available or in combinations as with the previous MPU HPU HSU and TPU optional boards Refer to the below table Sales code option board 4 th position Available functions HCU board Emulation mode B Spot temperature Pt100 RTD TPU 2 HSU C VITO temperature and or water probe HP...

Страница 9: ...The resulting difference between measured and desired value will cause a variation in the position of the stepper motor and consequently raise or lower the position of the displacer until the measured value equals the desired value To avoid oscillations a certain hysteresis and integration time is software adjustable This results in a stable and accurate averaged level measurement The stepper moto...

Страница 10: ...pot temperature and Analog output options Spot temperature measurement HCU Instruction manual Spot temperature and Analog output options Average temperature measurement via VITO temperature probe or MRT HCU Instruction manual VITO Pressure measurement for mass density and or vapour pressure measurement HCU Instruction manual HIMS Water bottom measurement HCU Instruction manual Temperature Water bo...

Страница 11: ...sure max 6 bar for medium pressure and chemical version max 40 bar 25 bar according PED for high pressure version relative humidity 0 100 ingress protection IP65 NEMA 4 suitable for outdoor installation The drum compartment which is in contact with the tank atmosphere is separated from electronic compartment A magnetic coupling transfers the drum movement hence displacer movement to electronic com...

Страница 12: ... of the reader A Warning concerns danger to the safety of the technician or user A Caution draws attention to an action which may damage the equipment A Note points out a statement deserving more emphasis than the general text but does not deserve a Warning or a Caution Warning In hazardous areas it is compulsory to use personal protection and safety gear such as hard hat fire resistive overall sa...

Страница 13: ...s are supplied Check that the mains voltage selector of the 854 ATG indicates the local mains supply Check the connections of all electrical cabling Check the ground connection of the 854 ATG to the tank Check that non used cable inlets are sealed with appropriate stopping plugs Close carefully all covers mind the O rings before any electrical power is applied Caution Keep screw thread from the co...

Страница 14: ...he drum shaft is properly positioned in the drum Attach the smallest of the four test weights or another small weight to the measuring wire remove the rubber band securing the measuring wire and feed the wire and test weight through the neck of the gauge see figure 3 2 Insert the measuring drum onto its bearings Check the axial free play of the drum as follows Push the drum towards the magnet cap ...

Страница 15: ...ok Secure this end several times around the hook Figure 3 3 Mounting displacer see figure 3 3 Close the drum compartment cover 3 2 4Unlocking locking the motor block The motor block is locked during transport to protect the force transducer After installing the measuring drum and displacer the motor block locking device must be unlocked Open the electronic compartment cover front cover Locate the ...

Страница 16: ...l have unique 2 letter abbreviations which allow easy access and programming In this manual items are printed bold There are three different type of items Type of item Description Commands These will force the gauge to execute a special task or function For example EX exit After the EX command the instrument start initialising and modified NOVRAM settings become active Data requests Items for requ...

Страница 17: ...l 2 password Additional measurement related items such as temperature items can also be protected by password 2 Password W2 itself can be read protected by means of jumper J A 2 on the XPU 2 board In protection level 2 the items which reside under protection level 1 can also be modified W M protection Items under protection level 2 can also be protected by jumper J A 3 on the XPU 2 board If this j...

Страница 18: ...he factory However several parameters application depended must be programmed at commissioning Step 1 Start with programming checking of the format depended items refer to section 3 3 3 Step 2 Proceed with programming checking of the items for the standard level measurement without optional functions refer to sections 3 3 4 to 3 3 7 Step 3 Check with the identification code on the label of your 85...

Страница 19: ... X separator X X X I inches format sign X X X X X separator X X P fractions format sign X X X X X X DP Decimal separator The item DP decimal separator can be point or comma format depended items Not required with XPU 2 board Program all level dimension and or decimal separator depended items to the new dimension and or separator Refer to the table below for an overview of these items EX Exit Exit ...

Страница 20: ...Commissioning Page 18 3 3 4Tank and gauge data Refer to figure 3 7 for the tank related data Figure 3 7 Tank related level items ...

Страница 21: ...d weight is programmed correctly in this item If not then enter the engraved displacer weight DA Displacer area Standard floating point format units cm 2 Check whether the pre programmed displacer area is in accordance with the used type of displacer Refer to Appendix B for information on the displacer area values If not correct program the correct displacer area S1 Set point Standard floating poi...

Страница 22: ... if not change it DA enter Check whether the displacer area is set correct if not change it S1 enter Check whether the set point 1 is set correct if not change it TA 02 enter The transmission address becomes 02 TI TK 102 enter Tank identifier programmed as TK 102 TS enter Check whether the transmission speed is correct if not change it GT enter Check whether the gauge type is set correct if not ch...

Страница 23: ...gure Note The high and low level alarms are innage alarms Hence a high alarm condition occurs when there is a low ullage value and visa verse Figure 3 8 Upper reference value Item Name Description W2 Protection level 2 Enter protection level 2 default password ENRAF2 UR Upper reference Format according to item LD The distance UR represents the distance from the innage zero point datum plate to the...

Страница 24: ...DY Display selection One character Only applicable with XPU 2 Y display connected N no display connected Note When the display is present but item DY is set to N no data will be shown on the display W1 Password 1 Six characters default password is ENRAF1 You can define your own level 1 password by entering six characters Password 1 is read protected if strap J A 1 on the XPU 2 board is in position...

Страница 25: ...l and will be shown on the display EX Exit Exit protection level 3 4 2Level calibration with a tank top reference stop A tank top reference stop is a mechanical device that can hold the displacer at a reproducible position when the displacer is pulled up This device is placed above the motor limit switch high position An Honeywell Enraf tank adapter can be provided with such a facility 1 Follow th...

Страница 26: ...mm for a 45 mm displacer use 12 mm RL Reference level Format according to item LD Enter the position of the top of the ball valve with respect to the tank zero adding the immersion depth of the displacer at the product level AR Accept reference By giving this command the level value entered in item RL is accepted as level value and will be shown on the display EX Exit Exit protection level CA Cali...

Страница 27: ... must be given as the displacer is now immersed for half of the volume in water On product level the displacer is immersed less The difference between both immersion depths must be given in item L3 Example 1 Immersion depth on product level surface displaced volume DW S1 ρproduct 15 0 9 16 67 cm 3 volume in cylindrical part 16 67 3 2 13 47 cm 3 immersion of cylindrical part 13 47 πr 2 13 47 π x 2 ...

Страница 28: ...ializing message If initializing of all processors is successful the display will switch to its default display format which is programmable with item DF The possible display formats are A level and temperature F pressure P1 B level H pressure P3 C average gas temperature I average servo density D average product temperature J analog level output E HIMS density K water level from external HART pro...

Страница 29: ...lay contrast for maximum readability CD can be set between 01 minimum contrast and 16 maximum contrast The display contrast can also be adjusted by means of the hall switches Additional displays There are four hall switches located on the XPU 2 display marked L R U and D refer to figure These switches can be operated by holding a magnet in front of them not the test magnet Switch L allows scrollin...

Страница 30: ...ic view items 00 03 EI 0S 0T EJ EP FS FH FM FT FX PF XS LC U previous item D next item 7 th Test gauge R test gauge U lock test D unlock The steps of switch L can only be followed in the sequence as given in the table above Display scroll The XPU 2 display can be configured to scroll automatically through all display formats This is done by setting item 3Z to enable Item Name Description W2 Protec...

Страница 31: ...he magnet in front of the display Refer to sections 4 1 1 and 4 1 2 4 3 Lock test The lock test command brings the displacer to the position programmed in item MZ lock test limit switch level During the lock test the level dimension and level type on the display are replaced by exclamation marks and the status field I1 changes to LT When the lock test limit switch level is reached the status field...

Страница 32: ...ing on the status of item BM the displacer will move up with an increasing level or the block is cancelled when the level reaches the displacer position The displacer will remain in its position until an unlock command UN is given Item BM has to be set checked at commissioning or at a later stage Item Name Description W1 Protection level 1 Enter protection level 1 password BM Block mode One charac...

Страница 33: ...be set at some distance DH above interface 1 product surface After a certain time DT a single product measurement is executed After the interface has been measured the displacer will be raised over the dip height DH The level shown on the display and transmitted to the host will be the dipped level and not the actual displacer position Item Name Description DM Dip mode Activates the dip mode In di...

Страница 34: ...ped but also at regular intervals configurable through item SI The SAT can also be performed manually by entering the command PQ The default behaviour of the SAT can be influenced by means of a number of configuration items Item Name Description SE SAT enable When set to E enabled a SAT will be started roughly 1 minute after tank loading has apparently stopped Furthermore SATs will be executed at ...

Страница 35: ...mple audit trail functionality is implemented by recording several SAT related parameters Item Name Description PE SAT last fail level Level at which a SAT last failed PL SAT last level Level at which the most recent SAT was performed PX SAT minimum level Lowest level at which a SAT has been performed since NOVRAM initialization PY SAT maximum level Highest level at which a SAT has been performed ...

Страница 36: ...is used as reference point the level calibration of the 854 ATG can be verified Proceed as follows Item Name Description CA Calibrate The displacer will be raised until it stops against the flange of the level gauge Make sure the displacer is positioned above the ball valve Close the ball valve UN Unlock Unlock the gauge and wait the displacer reaches the top of the ball valve RL Reference level R...

Страница 37: ...V BW FQ WQ Control data Average measured frequency Maximum unbalanced weight Minimum unbalanced weight Average measured weight Frequency request Weight request EP ES Error codes Error XPU request Error SPU request Compensated for hydrostatic tank deformation items HF HL Operational commands Item Description Item Description BL BT CA DM FR I1 Block Balance test Calibrate Dip mode Freeze Interface 1...

Страница 38: ...s grams weight Request for the maximum unbalanced weight BV Minimum unbalanced Standard floating point format units grams weight Request for the minimum unbalanced weight UN Unlock Cancel the lock test command Calculate the maximum measuring drum unbalance as BU BV The drum unbalance should be within 3 grams When the drum unbalance is more check for contamination of the drum If the unbalance is st...

Страница 39: ...ment are fitted with O rings refer to figure 5 1 and 5 2 Use a metal rod like a Tommy bar for opening the covers Check the O rings to assure water and dust protection Refer to Appendix A for the dimensions of O rings Closing the compartment covers In order to ensure that the covers open easily their screw threads have been greased Caution The 854 ATG is an explosion proof instrument with intrinsic...

Страница 40: ...erted into the magnet cap Two carbon PTFE bearings in the drum shaft bushing support the drum shaft These bearings should be replaced when repeatability deteriorates The drum shaft bushing is kept in position by a circlip The drum shaft bushing is provided with an internal thread which facilitates removal from the magnet cap Figure 5 1 Cross section of the drum compartment Figure 5 2 Cross section...

Страница 41: ...Remove the displacer from the measuring wire Attach a small weight on the wire to keep it positioned in the groove Do not damage the measuring wire Pull out the drum and fix the wire to the drum with a rubber band Do not kink the measuring wire and handle drum carefully If the displacer cannot be accessed through an opening the gauge must be removed from its mounting position Raise the displacer t...

Страница 42: ... out the drum shaft bushing Replace the bearings refer to figure below Install the bushing Install drum and displacer Close the cover Figure 5 3 Replacing the drum shaft bearings Caution Do not grease the carbon PTFE bearings The drum bearings do not require any lubricant at all ...

Страница 43: ...blies The design of the 854 ATG is such that it makes replacement and service simple The electronic compartment contains the following sub assemblies refer to figure 5 4 1 Back plane 2 Printed circuit board XPU Xmission Processing Unit 3 Printed circuit board SPU Servo Processing Unit 4 Printed circuit board Optional board HCU 5 Printed circuit board GPS Gauge Power Supply 6 Force transducer 7 Ste...

Страница 44: ...plane Disconnect the force transducer cable Remove the two screws holding the force transducer by Figure 5 5 Locking latch lifting it slightly in order to release the span wire from the force transducer Disconnect the infra red connector from the back plane Remove the circlip from the main shaft Gently remove the motor from its shaft and remove the key If the back plane must be replaced proceed as...

Страница 45: ...the EPROMs and NOVRAM 5 4 4Initializing NOVRAM If a new software version is installed or a feature has been added to the 854 level gauge NOVRAM initialization is required With this procedure all items are declared in the NOVRAM and filled with their default value After the initialization reprogramming of all items is necessary When the 854 ATG is equipped with an XPU board the NOVRAM is initialize...

Страница 46: ...assword WT Wire rupture Disable the wire rupture by setting WT to DDD This prevents that under certain circumstances the 25 g calibration will be aborted EX Exit Exit protection level which de activates the wire rupture Remove the displacer from the measuring wire and attach the smallest test weight of 25 grams Item Name Description LT Lock test Raise the displacer as high as possible until it is ...

Страница 47: ...nit Hz Program frequency 3 measured with test weight of 250 g WT Wire rupture Three characters Reprogram wire tension protection advised setting EDE EX Exit Exit protection level Note A faster method of calibration is using the commands MF and FQ in stead of BT and BF This method may not be followed when your gauge is used for density measurement via the density displacer 5 6 Synchronizing the ref...

Страница 48: ...0 b2 1 b1 1 b0 0 Bit 7 is always a 0 and bit 6 is always a 1 to avoid control characters Look up the relevant status byte in this section e g QS in section 6 4 to determine the meaning of the bits which are set to 1 Only the bits set to 1 represent an actual status 6 1 Problems with displacer movement If the displacer is not running freely for instance stuck against a stilling well it can be contr...

Страница 49: ...e is a serious fault caused by interference or a faulty XPU board 136 SPU board not responding Missing SPU board or SPU board not well connected in backplane or SPU board defective 137 Optional board not responding Missing optional board or optional board not well connected in backplane or optional board defective 999 Fatal XPU error Serious internal XPU software error check contents of item 00 an...

Страница 50: ...splacer movement up 2 high level alarm 2 on level 3 high high level alarm 3 test flag 4 motor limit switch low 4 calibration test successful 5 motor limit switch high 5 calibration test failed 6 1 6 1 7 0 7 0 Status byte 2 Active interface bit 0 Active interface bit 0 bit 1 bit 0 Mode 1 Active interface bit 1 0 0 I1 2 dipped level 0 1 I2 3 0 1 0 I3 4 general fail indication 1 1 dip 5 no previous S...

Страница 51: ...mer 65 240 V S0854964 19 HCU optional printed circuit board for VITO temperature and or water probe S0854930 VITO temperature and or water probe HART device s S0854931 Analog level output S0854935 Analog level output Spot temperature Pt100 RTD VITO temperature and or water probe HART device s S0854934 EPROM programmed for HCU ICU_HPI S0181311 20 SPU printed circuit board without hardware alarms S0...

Страница 52: ...re stainless steel AISI 316 30 m S0802801 measuring wire stainless steel AISI 316 40 m S0802856 measuring wire stainless steel AISI 316 150 m S0802806 measuring wire Hastelloy 30 m S0802861 measuring wire Hastelloy 40 m S0802862 measuring wire INVAR 30 m S0802840 measuring wire INVAR 40 m S0802841 measuring wire Tantalum 30 m S0802851 measuring wire Tantalum 40 m S0802852 43 set drum bearings 2 pc...

Страница 53: ...Appendix Instruction manual 854 ATG Page 51 ...

Страница 54: ... 02 10500000E 03 10500000E 03 10500000E 03 10500000E 03 22300000E 03 22300000E 03 22300000E 03 22300000E 03 Stainless steel ø 90 mm ø 110 mm ø 140 mm 0815 171 0815 173 0815 175 64000000E 02 95000000E 02 15400000E 03 60000000E 02 10000000E 03 17500000E 03 22300000E 03 22300000E 03 22300000E 03 Density displacer stainless steel ø 90 mm ø 43 mm S0815350 S0815355 64000000E 02 16000000E 02 approximatel...

Страница 55: ...Appendix Instruction manual 854 ATG Page 53 ...

Страница 56: ...Appendix Page 54 Appendix C ASCII table ...

Страница 57: ...Appendix Instruction manual 854 ATG Page 55 Appendix D Display formats Level and Temperature display format A ...

Страница 58: ...Appendix Page 56 Level display format B Average gas temperature display format C ...

Страница 59: ...Appendix Instruction manual 854 ATG Page 57 Average product temperature display format D HIMS density display format E ...

Страница 60: ...Appendix Page 58 HIMS pressure displays format F and H Servo density display format I ...

Страница 61: ...Appendix Instruction manual 854 ATG Page 59 Analog level output display format J Water level display format K ...

Страница 62: ...Appendix Page 60 Appendix E PCB layout XPU 2 HCU HCU SPU II GFC ...

Страница 63: ... Safety manual series 854 ATG XTG level gauges Instruction manual Spot temperature and Analog output options Instruction manual VITO Instruction manual HIMS Instruction manual 977 Tank Side Indicator Instruction manual 847 Portable Enraf Terminal Instruction manual Engauge service tool Item documentation for Honeywell Enraf series 854 level gauges 97x SmartRadar and 877 FDI Protocol manual for 854...

Страница 64: ...1 35 Dip time interval 31 Displacer 7 13 23 39 40 44 46 area 19 hook 13 volume 7 13 25 weight 7 13 19 25 36 46 Display 26 configuration 28 contrast 27 format toggle 28 scroll 28 XPU 26 XPU 2 26 27 Display format 22 26 27 toggle 28 Display selection 22 DJ 22 DM 31 35 DP 17 Drum circumference 12 19 Drum compartment 38 Drum shaft 12 38 bushing 38 40 DV 25 DW 19 25 DY 22 Electronic compartment 42 Enco...

Страница 65: ...weight compensation 19 Metres 17 MF 35 36 45 MH 19 Minimum unbalanced weight 35 36 ML 19 Motor block 13 41 42 45 Motor limit switch high 19 position 23 Motor limit switch low 19 Motor shaft 7 MZ 19 29 Note 10 NOVRAM 42 43 initialization 43 item view 28 settings 14 Optional board 41 Password 1 15 22 Password 2 15 17 19 22 PCB retaining screw 42 PE 33 PET 9 14 16 PL 33 Portable Enraf Terminal 9 14 P...

Страница 66: ...Tool set 12 Top of ball valve 24 Transmission address 19 Transmission speed 19 Transport bracket 13 TS 19 TSI 8 TT 19 23 34 Ullage 21 UN 16 24 30 34 35 Unlock 16 24 30 34 35 Upper reference 21 point 21 UQ 35 UR 21 Verify level calibration 34 W M 14 protection 15 W1 15 22 W2 15 17 19 22 Warning 10 Warranty 2 Water bottom probe 8 Water measurement 22 33 Weight request 35 36 Weights Measures 14 prote...

Страница 67: ......

Страница 68: ...6220 Revision 8 September 2013 2013 Honeywell International Inc Honeywell Enraf Delftechpark 39 2628 XJ Delft The Netherlands Tel 31 0 15 2701 100 Email hfs tac support honeywell com www honeywellenraf com ...

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