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Average temperature measurement with MRT

___________________________________________________________________________

Instruction manual VITO

Page 21

3.2

Commissioning of Multiple Resistance Thermometer

The commissioning of the optional average temperature part should be performed after the basic commissioning
of the level gauge or indicator.

3.2.1

Temperature related settings

Refer to figure 3.1

Item

Name

Description

Protection level 2

Enter protection level 2

Temperature dimension

One character; either ‘C’ or ‘F’. Default set to C.

C : degrees Celsius

F : degrees Fahrenheit

Both dimensions have the same format.

Multi temperature distribution One character; either ‘F’ or ‘T’. Default set to F.

This item determines whether fixed element positions are taken
or configurable element positions via the items

F : Fixed element positions (default)

T : Configurable element positions (as per items

)

The fixed element positions are described at section 3.3.2.

J0 – JD

MRT element position.

Format according to item

(default: +000.0000 m).

J0 through JD represent the distance from the end of the probe
(nearest to tank zero level) to the MRT element if selected by
item

Element type

Three ASCII characters (C3 C2 C1). Selects the element type

connected to the 762 VITO MRT, with its characteristics.

refers to an MRT without spot element

refers to an MRT with spot element

C2 C1 CB

= 90.2935 + T x 0.38826

range : -100

+250

C (-148

+482

= 90.4778 + T x 0.38090

range : -100

+250

C (-148

+482

= 90.5000 + T x 0.38730

range : -100

+250

C (-148

+482

where : R

= resistance MRT element [

Ω

]

T = temperature MRT element [

PS *) Pt100 small range

range: -20

+120

C (-4

+248

PL *)

Pt100 large range
range : -200

+250

C (-328

+482

NI *)

Ni191 mid temp/tri temp

range: -20

+120

C (-4

+248

*) From HCU/ICU_HPI software version A1.9 and higher

Number of elements

Two ASCII digits. This item specifies the number of elements

from the MRT, inclusive the spot element. The maximum number
of elements is 14.

Содержание Enraf VITO

Страница 1: ...Instruction manual VITO interface and average temperature and water probes for 854 servo 97x SmartRadar and 877 FDI ...

Страница 2: ......

Страница 3: ... Instruction manual VITO interface and average temperature and water probes for 854 servo 97x SmartRadar and 877 FDI April 2013 Part no 4416 655 Revision 6 Enraf B V P O Box 812 2600 AV Delft Netherlands Tel 31 15 2701100 Fax 31 15 2701111 E mail enraf nl honeywell com Website http www honeywellenraf com ...

Страница 4: ...f Enraf B V is not allowed This manual is for information 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 ...

Страница 5: ...erving more emphasis than the general text but does not deserve a Warning or a Caution The sequence of steps in a procedure may also be important from the point of view of personal safety and prevention of damage it is therefore advised not to change the sequence of procedure steps or alter a procedure Legal aspects The commissioning and trouble shooting to the instrument may only be conducted by ...

Страница 6: ...atus request item MQ 17 2 4 3 Temperature pointer items VP and VV 18 3 Average temperature measurement with MRT 20 3 1 Introduction MRT 20 3 2 Commissioning of Multiple Resistance Thermometer 21 3 2 1 Temperature related settings 21 3 2 2 Additional settings for and 877 FDI 23 3 2 3 Temperature verification MRT probes 23 3 3 Operation 24 3 3 1 Display 24 3 3 2 Data items 24 3 4 Troubleshooting 25 ...

Страница 7: ...surement 36 5 2 Commissioning of water bottom probe 36 5 2 1 Commissioning measurements 36 5 2 2 Water probe settings 39 5 3 Operation 40 5 3 1 Display 40 5 3 2 Water above below probe warning 40 5 3 3 Data items 40 5 4 Troubleshooting 41 5 4 1 Water error request item EW 41 5 4 2 Water level ullage status bytes 41 5 4 3 Water bottom pointer items VP and VV 42 Appendix A ASCII table 43 Appendix B ...

Страница 8: ...Average temperature probe VITO Interface configuration There are three types of VITO Interface units each for a specific type of average temperature probe 762 VITO MTT Interface for model 764 VITO average temperature probe or model 766 VITO combi probe average temperature probe with integrated water probe or model 765 VITO water probe 762 VITO LT Interface for model 767 VITO LT average temperature...

Страница 9: ...ure probes can be found in the introduction section of chapters 2 3 and 4 The Honeywell Enraf level gauge must be equipped with a suitable option board to receive the signal from the 762 VITO Interface HCU option board for Honeywell Enraf 854 servo level gauges and 877 FDI ICU_HPI option board for Honeywell Enraf 97x SmartRadar level gauges FII VT board for Honeywell Enraf 990 SmartRadar FlexLine ...

Страница 10: ...ositioned at the bottom of the probe The remaining 15 elements are subsequently equally divided from the reference resistor located at 1 m 39 from the bottom of the probe up to the highest element 3 The VITO MTT 766C probe comprises a water probe 16 measuring elements and has its lowest element reference element positioned above the water probe see table 2 1 Its 16 elements are subsequently equall...

Страница 11: ...e bottom of the probe is not used for average product temperature calculations Only when the level is such low that the reference element is not selected anymore for average product temperature calculation the lowest element is used as average product temperature but with a special temperature status level below lowest element That will be shown on the tank gauging system as a temperature with red...

Страница 12: ...distance tank zero bottom of probe to obtain the offset figure needed in item MO In case the Model selection code cannot be read there are several ways to find out the correct model of probe Orange wire present in wire loom of VITO probe position 8 of Model selection code is D Orange wire absent in wire loom of VITO probe position 8 of Model selection code is C During and after commissioning check...

Страница 13: ...ge temperature measurement with VITO temperature probes ___________________________________________________________________________ Instruction manual VITO Page 11 Figure 2 1 Tank and temperature probe data ...

Страница 14: ...ge temperature measurement with VITO temperature probes ___________________________________________________________________________ Instruction manual VITO Page 12 Figure 2 2 Tank and temperature probe data ...

Страница 15: ...0 m The distance MP specifies the minimum required liquid level above a thermocouple before it is taken in the average product temperature calculation MG Gas immersion depth Format according to item LD default 000 5000 m The distance MG specifies the minimum required distance below a thermocouple before it is taken in the average gas temperature calculation WP Water probe length Format according t...

Страница 16: ...after entering the 15 th character Continue with entering the last character and press return All 16 entered characters will be repeated at the top line of the PET EX Exit Exit protection level 2 2 2 2 Additional temperature settings for 877 FDI Item Name Description W2 Protection level 2 Enter protection level 2 OB Option board Three ASCII characters This item informs the XPU what option board is...

Страница 17: ...icating the highest selected element for average product temperature calculation This can be judged on basis of the product level and with the items U0 UF calculated spot positions item MO temperature element offset item MP product immersion depth and item MI switch hysteresis Refer to Detail A in figure 2 1 A spot element will be used in the average product temperature calculation if its position...

Страница 18: ...sed to check the results of certain steps in the measuring sequence The temperature status indicates the validity of the measured data The error data provides low level error information about the temperature measurement refer to section 2 4 Item Description AG AP MQ MU U0 UF V0 VF Measured Average gas temperature Calculated data Average product temperature Temperature status request refer to sect...

Страница 19: ...tor failed Reset instrument if error persist replace 762 VITO interface or VITO probe xx84 Standard deviation too large EMC influence check cable shields or defective 762 VITO interface xx92 No data available Communication error between 762 VITO interface and level gauge Check wiring replace 762 VITO interface or option board xx98 No temperature sources found No VITO temperature probe and no RTD c...

Страница 20: ... 1 floating point format Measured Pt100 resistance floating point format Standard deviation floating point format Vtest floating point format Leak current I1 floating point format Leak current I2 floating point format Error counters HART addresses 3 4 and 5 Error counters HART addresses 6 7 and 8 762 VITO HART address 5 762 VITO LT HART address 6 Detected HART device addresses 5 for VITO Interface...

Страница 21: ...ion VP Temperature value pointer Temperature value pointer format 2 digits separator 2 digits refer to table 2 4 Example VP 02 20 value pointer loaded to request the Pt100 element resistance VV Temperature pointer value Temperature pointer value This item holds the value requested by item VP refer to table 2 4 Example the requested Pt100 element resistance standard floating point format ...

Страница 22: ...the longest resistance thermometer element and subtracting the contribution of the average product temperature The 762 VITO MRT Interface is used for interfacing an MRT This unit is basically a solid state electronic element selector containing all hardware necessary for selecting and measuring an MRT with up to 13 temperature elements with one spot element The operational board located in the 854...

Страница 23: ...ons as per items J0 JD The fixed element positions are described at section 3 3 2 J0 JD MRT element position Format according to item LD default 000 0000 m J0 through JD represent the distance from the end of the probe nearest to tank zero level to the MRT element if selected by item MJ MT Element type Three ASCII characters C3 C2 C1 Selects the element type connected to the 762 VITO MRT with its ...

Страница 24: ... 5000 m The distance MP specifies the minimum required liquid level above an element before it is selected for the average product temperature calculation MG Gas immersion depth Format according to item LD default 000 5000 m The distance MG specifies the minimum required distance before the resistance value of the longest element is taken in the average gas temperature calculation TU Temperature s...

Страница 25: ... This item is not implemented in the XPU 2 3 2 3 Temperature verification MRT probes After the settings described in section 3 2 1 and if applicable in section 3 2 2 are entered the temperature measurement is operational The following checks can be made to verify if the settings are made correct and the product temperature reading is correct Read item AP Average Product temperature This data item ...

Страница 26: ... with respect to lowest point of MRT see below Element temperatures see below VV Verification data Refer to description at section 3 4 3 EM FH F0 Diagnostic data Error request refer to section 3 4 1 Fatal errors Last fatal error Table 3 1 Items U0 UD gives the position of each element with respect to the lowest part of the MRT U0 position of 1st element 0 25 m 9 13 16 or 0 65 m 2 1 9 16 or J0 U1 p...

Страница 27: ...d absent xx92 No data available Check wiring or connection with VITO Interface xx57 Element 8 detected absent xx58 Element 9 detected absent xx59 Element 10 detected absent xx60 Element 11 detected absent xx61 Element 12 detected absent xx62 Element 13 detected absent xx63 Element 14 detected absent xx 22 for MPU emulation 24 for HPU emulation 30 for HCU emulation 3 4 2 Temperature status request ...

Страница 28: ...at Calculated temperature of 14th element floating point format Standard deviation floating point format Calculated I_ref floating point format Calculated resistance 1st element floating point format Calculated resistance 2nd element floating point format Calculated resistance 14th element floating point format Error counters HART addresses 3 4 and 5 762 VITO MRT Interface has HART address 5 Detec...

Страница 29: ...1 and 4 2 The RTD elements below the product level are used to determine the average product temperature in respect to product immersion depth and hysteresis mechanisms and to actual valid level last valid level or manual level The RTD elements above the product level are used to determine the average gas temperature in respect to gas immersion depth and hysteresis mechanisms and to actual valid l...

Страница 30: ... not at hand the element positions can also be calculated from the Model selection code on the identification label Position 11 of the Model selection code defines the Position of the lowest element and Positions 16 through 19 list the Position of the highest element unit is cm VITO probe model Position 11 Model selection code Position of lowest element 361 C 1 00 m 3 3 6 16 361 D 0 15 m 5 15 16 T...

Страница 31: ...0 Position lowest element J1 Position lowest element 1 x element spacing J2 Position lowest element 2 x element spacing etc For example Position lowest element is 0 15 m 5 9 Position highest element is 17 300 m 681 1 Number of elements 9 Step 1 Element spacing Step 2 Element positions J0 0 150 m or 5 9 J1 2 294 m or 90 3 J2 4 438 m or 174 7 J3 6 581 m or 259 1 J4 8 725 m or 343 5 J5 10 869 m or 42...

Страница 32: ...f the RTD spots items J0 J2 represent the distance from tank zero level to the RTD spot In case of a MPT probe items J0 JD represent the distance from the bottom of the probe nearest to tank zero level to the RTD elements Refer to the description above to obtain the values for J0 JD Note Only enter as much element positions as specified by the number of elements starting from J0 see item MN MI Swi...

Страница 33: ... This item is not implemented in the XPU 2 4 2 3 Temperature verification MPT Multiple Pt100 spots probes After the settings described in section 4 2 1 and if applicable in section 4 2 2 are entered the temperature measurement is operational The following checks can be made to verify if the settings are made correct and the product temperature reading is correct Read item AP Average Product temper...

Страница 34: ...r of data items They contain measured data verification data and error data The verification data can be used to check the results of certain steps in the measuring sequence The temperature status indicates the validity of the measured data The error data provides low level error information about the temperature measurement refer to section 4 4 Item Description AG AP MQ MU U0 UF V0 VF Measured Av...

Страница 35: ... VITO xx57 Element 8 detected absent xx58 Element 9 detected absent xx59 Element 10 detected absent xx60 Element 11 detected absent xx61 Element 12 detected absent xx62 Element 13 detected absent xx63 Element 14 detected absent xx 22 for MPU emulation xx 24 for HPU emulation xx 30 for HCU emulation 4 4 2 Temperature status request item MQ Four bytes status information B0 B1 B2 B3 with the followin...

Страница 36: ...ent floating point format Standard deviation floating point format Calculated I_ref floating point format Calculated resistance 1st spot element floating point format Calculated resistance 2nd spot element floating point format Calculated resistance 14th spot element floating point format Error counters HART addresses 3 4 and 5 762 VITO MRT Interface has HART address 5 Detected HART device address...

Страница 37: ... parts as water and the tank shell is the other plate A change in water level is detected by the water bottom probe as a change in capacitance 5 1 1 Water probe versions There are three different water probe versions which can be interfaced The 765 VITO water probe The 766 VITO combi probe The 768 VITO combi probe The 765 VITO water probe the 766 VITO combi probe and the 768 VITO combi probe are c...

Страница 38: ...f the stored product This value needs to be adjusted Refer to Calibration of water probe in Appendix B The value at VT is the maximum capacity capacitance measured in water and needs no adjustement The measured capacitance by the water probe has a linear function with the water level Hence the water level is calculated as If LW WS otherwise LW 0 Where LW water level MX measured capacitance VR mini...

Страница 39: ...ext step is to fetch the product level with respect to the tank zero point This can be done in several ways Read the level from the level gauge if that has recently been checked calibrated Take a manual innage measurement to the datum plate of the tank Take a manual ullage measurement from the Upper Reference Point and calculate the level by level URP ullage Refer to figure 5 2 At the bottom part ...

Страница 40: ...P LD M metres Item WP LD F feet Item WP LD I inch Item WP LD P fractions A 000 4850 0001 591 00019 09 01 07 02 B 000 9850 0003 232 00038 78 03 02 12 C 001 9850 0006 512 00078 15 06 06 02 Table 5 1 Minimum and Maximum capacitance Factory calibration values for the maximum capacity and minimum capacity are listed on the CheckList 765 766 768 Final Assembly delivered with every VITO probe The value a...

Страница 41: ...ed WF Water level field communication One character S or D Only valid with 854 level gauges This item selects from which source the water level is measured and transmitted in the level record B record to the system S from the water probe VITO water sensor or side mounted water probe D from water dip displacer Select S for 854 the gauges default D WH Water high alarm Format according to item LD def...

Страница 42: ...low probe status BP is displayed and signalled in the water level record when the water level is within 1 of the probe length item WP from the bottom of the water probe Around these warnings there is a hysteresis of 0 5 of the probe length item WP 5 3 3 Data items Table 5 2 lists a number of data items They contain measured data verification data and error data The verification data can be used to...

Страница 43: ...nge 765 766 768 VITO probe xx07 Capacitance shortcut Either water probe error or internal 762 VITO interface error xx11 No reply on initial HART commands Communication error Check connection level gauge 762 VITO interface or change 762 VITO interface or HCU ICU_HPI board xx79 Not calibrated Check items VR and VT set to zero or are equal to each other xx98 No water sources found No water probe conn...

Страница 44: ...0 1 0 2 0 3 0 1 0 9 1 0 1 1 1 2 2 0 0 0 0 1 Configuration boot code Sales code option C boot code 0A J 2E W 1A X 12 Y 3F HCU ICU_HPI hardware version Boot code software version Error counters HART addresses 3 4 and 5 Detected HART device addresses 762 VITO MTT and VITO MRT have HART address 5 762 VITO LT has HART address 6 See 2 4 3 Average temperature settings Real active functions of VITO interf...

Страница 45: ...0 101 110 111 0 0 0 0 0 NUL DLE SP 0 P p 1 0 0 0 1 SOH DC1 1 A Q a q 2 0 0 1 0 STX DC2 2 B R b r 3 0 0 1 1 ETX DC3 3 C S c s 4 0 1 0 0 EOT DC4 4 D T d t 5 0 1 0 1 ENQ NAK 5 E U e u 6 0 1 1 0 ACK SYN 6 F V f v 7 0 1 1 1 BEL ETB 7 G W g w 8 1 0 0 0 BS CAN 8 H X h x 9 1 0 0 1 HT EM 9 I Y i y A 1 0 1 0 LF SUB J Z j z B 1 0 1 1 VT ESC K k C 1 1 0 0 FF FS L l l D 1 1 0 1 CR GS M m E 1 1 1 0 SO RS N n F ...

Страница 46: ...e tank probe partly covered with product and partly covered by air 2 Product in the tank probe fully covered with product and no water 3 Product and water in the tank probe partly covered by water and partly covered by product In all other situations no calibration can be made and the values from the test certificate shall be used Situation 1 probe partly covered by product Refer to the figure Man...

Страница 47: ... manual measurement of water level The interpolation of the capacitance value is done as follows Round off the water value to 0 1 To calculate the value for item VR minimum capacitance the actual measured capacitance item MX and the maximum capacitance item VT should be known These two values can be read by the PET or via the service program from the instrument The minimum capacitance value is the...

Страница 48: ...Appendix ___________________________________________________________________________ Instruction manual VITO Page 46 Step 2 calculate value for VRnew ...

Страница 49: ...rification the product level shall be at least 4 m 13 ft 2 The manual temperature will be taken at 5 points Calculate the interval as follows Interval product level m 2 m 5 1 or product level ft 6 ft 5 1 3 Locate a gauge hatch closest to the average temperature element and open it Slowly lower the probe from the portable electronic thermometer till 1 m 3 ft above the bottom 4 Wait till the tempera...

Страница 50: ...ure 762 VITO interface Item Description Part no 1 Protective cover over HART terminals 0186 901 2a Printed circuit board 762 VITO MTT Interface 0762 950 2b Printed circuit board 762 VITO MRT Interface 0762 960 2c Printed circuit board 762 VITO LT Interface 0762 970 3 O ring 190 18 x 2 62 NBR70 2132 991 4 Cover 762 VITO interface 0186 798 Table D 1 762 VITO interface ...

Страница 51: ...Related documents Instruction manual series 854 ATG level gauge Instruction manual series 854 XTG level gauge Instruction manual 877 Field Display Interface Instruction manual 97x SmartRadar series Installation guide 762 VITO Interfaces VITO MTT LT MRT and MPT probes Installation guide 864 MTT Multi Thermo sensor Thermometer ...

Страница 52: ...Honeywell Enraf Delftechpark 39 2628 XJ Delft The Netherlands Tel 31 0 15 2701 100 Email enraf nl honeywell com www honeywellenraf com 4416655 Revision 6 April 2013 2013 Honeywell International Inc ...

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