Instruction manual Spot temperature and Analog output options for 854 servo, 97x SmartRadar and 877 FDI

Transcription

1 Instruction manual Spot temperature and Analog output options for 854 servo, 97x SmartRadar and 877 FDI June 22 Part no Revision 5 Enraf B.V. P.O. Box AV Delft Netherlands Tel. : Fax : enraf-nl@honeywell.com Website : Instruction manual Spot temperature and Analog output options Page

2 Copyright Enraf B.V. All rights reserved. Reproduction in any form without the prior consent of 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 of purchase. Instruction manual Spot temperature and Analog output options Page 2

3 Preface Preface This manual is intended for technicians involved with the commissioning and service of the optional functions of Spot temperature measurement and Analog level output with the Honeywell Enraf 854 servo gauges, the 97x SmartRadar gauges or the 877 Field Display & Interface. A description preceding the technical procedures gives the technical information necessary to understand its functioning. It is recommended to read this description prior to performing any of the procedures. Safety and prevention of damage Refer to the chapter Safety in the instruction manual of the applicable instrument (servo/radar gauge or indicator) for detailed safety instructions. "Warnings", "Cautions", and "Notes" have been used throughout this manual to bring special matters to the immediate attention 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". 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 qualified engineers, trained by Honeywell Enraf and with knowledge of safety regulations for working in hazardous areas. The information in this manual is the copyright property of Enraf B.V., Netherlands. Enraf B.V. disclaims any responsibility for personal injury or damage to equipment caused by: Deviation from any of the prescribed procedures; Execution of activities that are not prescribed; Neglect of the general safety precautions for handling tools and use of electricity. EC declaration of conformity The Honeywell Enraf instrument, in which the optional HCU, ICU_HPI or ICU_HPO board is installed, is in conformity with the protection requirements of EC Council Directive 93/68/EEC. Refer to CE declaration of conformity delivered with the instrument or to the installation guide of the instrument. Additional information Please do not hesitate to contact Honeywell Enraf or its representative if you require any additional information. Instruction manual Spot temperature and Analog output options Page 3

4 Table of contents Table of contents Introduction Spot temperature measurement Introduction Commissioning of spot temperature measurement Spot temperature settings Additional temperature settings for 877 FDI Operation Display Data items Troubleshooting Temperature error request (item EM) Temperature status request (item MQ) Temperature pointer value (item VV)... 3 Analog level output Introduction HCU analog output characteristics ICU_HPO analog output characteristics Commissioning of analog level output Setting of analog output 97x SmartRadar to active Analog output settings Calibrate analog output circuit Verify output current Operation Display Data items Troubleshooting Analog output error request (item EA) Analog output status request (item AQ) Analog output pointer (items VP and VV) Communication board (ICU_HPO) actual status (item OA) Communication board (ICU_HPO) last encountered fatal error (item OF) Appendix A ASCII table Appendix B Part numbers Appendix C Related documents Instruction manual Spot temperature and Analog output options Page 4

5 Introduction Introduction This manual describes the spot temperature option of the optional HCU and ICU_HPI board and the analog level output of the optional HCU board and ICU_HPO board. The HCU board is an option board for the Honeywell Enraf 854 servo level gauges and 877 Field Display & Interface. The ICU_HPI board is an option board for the Honeywell Enraf 97x SmartRadar level gauges. Instrument Option board Function 854 servo HCU Spot temperature and/or Analog level output 877 FDI HCU Spot temperature and/or Analog level output 97x SmartRadar ICU_HPI ICU_HPO Spot temperature Analog level output In this manual the commissioning settings for the two functions are described in the following chapters: Spot temperature measurement: chapter 2 Analog level output: chapter 3 The optional HCU and ICU_HPI boards also interface VITO probes and other HART devices. For a description of those functions, refer to the Instruction manual VITO interface and average temperature (and water) probes and Instruction manual HIMS / Vapour pressure (P3). The ICU_HPO board is an optional board for the 97x SmartRadar, providing an analog level output with HART communications. This manual only describes the analog output. For the HART communications, refer to Instruction manual 97x SmartRadar HART output communication. Instruction manual Spot temperature and Analog output options Page 5

6 Spot temperature measurement 2 Spot temperature measurement 2. Introduction A standard Pt spot element (RTD) can be measured and its temperature is interpreted by the HCU and ICU_HPI board as product temperature. As from HCU/HPI software version A2. and higher, also Ni9 elements (TriTemp / MidTemp) can be measured. The temperature measurement is intrinsically safe, certified EEx ia IIB. Principle of operation The temperature measurement is based on a 3-wire RTD configuration. Only the ICU_HPI board has the option for a 4-wire RTD configuration. The resistance measurement for 3-wire configuration is performed in the following steps: The spot element is measured, including the cable resistance The cable resistance is measured separately, and subtracted from the element resistance to avoid influence of the cabling on the temperature measurement Next, the system constant is determined. This is done by measuring an accurate reference resistance (R ref ).% + 2 ppm/ C (-4-85 C) In order to check the R ref, a test resistor (R test ) is measured. This resistor has the same accuracy as the reference resistor These four measurements are performed with and without current to compensate for any thermo or offset voltage in the measuring circuit. The temperature data is displayed (when a display is present) as product temperature and transmitted to the host. Instruction manual Spot temperature and Analog output options Page 6

7 Spot temperature measurement 2.2 Commissioning of spot temperature measurement The commissioning of the optional spot temperature part of the HCU or ICU_HPI board should be performed after the basic commissioning of the level gauge or indicator Spot temperature settings Item Name Description W2= Protection level 2 Enter protection level 2. TD= Temperature dimension One character; either C or F. Default set to C. C : degrees Celsius F : degrees Fahrenheit Both dimensions have the same format. MT= Temperature element type Three characters (default: TPL) Valid settings for spot temperature measurement are: SPL : Pt RTD large range ( C) SNI : Ni9 TriTemp / MidTemp ( C) This selection is possible from HCU/HPI software version A2. and higher. With previous software versions only Pt spot elements could be measured and hence, no selection required. Due to the default value (TPL), at first a temperature error message appears. The temperature error is cancelled after item MT is set correctly. MN= Element configuration Two digits (default: 6) 3 : for 3 wire RTD configuration or 4 : for 4 wire RTD configuration (ICU_HPI board only). Note: If a 4 wire RTD configuration is used, strap ST4 on the ICU_HPI board must be placed to the correct position (refer to fig. 2.). MO= RTD position Format according to item LD. MO represents height of the RTD element with respect to the zero point of the level gauge. If the measured level drops below this height the following two actions takes place: ) The corresponding status bit (bit 3) is set in status byte of item AP (temperature request); 2) The temperature status on the instrument display (if applicable) is set to LR. MI= Switch hysteresis Format according to item LD. Default: +. (m). Item MI is a switch hysteresis around the RTD position item MO. TU= Temperature status conversion One character; default T. This character is transmitted in the temperature status byte to the host in case of: - level below RTD position (item MO) - invalid level reading If required, this item can be set to another character. EX Exit Exit protection level. Instruction manual Spot temperature and Analog output options Page 7

8 Spot temperature measurement Figure 2. Strap ST 4 on ICU_HPI board for selection of 3-wire or 4-wire element configuration Additional temperature settings for 877 FDI Item Name Description W2= Protection level 2 Enter protection level 2. OB= Optional board *) EG= Enable temperature transmission*) TF= Temperature source selection Three ASCII characters. This item informs the XPU (and XPU-) what option board is installed. It has to be set to HPU. One ASCII character; either D or E. With this item can be selected if the 877 FDI shall answer on a temperature request (C-record), addressed to the connected level gauge. E : transmission of temperature record enabled D : transmission of temperature record disabled Note: When item EG is set to E, make sure the related level gauge has no temperature option installed. One ASCII character; either I or E. This item selects if there is a temperature measurement inside the indicator (Internal), or the temperature has to be fetched from the Enraf field bus (External). I : Internal (HCU optional board installed) E : External IM= Indicator mode One ASCII character. With XPU-2, the 877 FDI can be set in stand alone temperature gauge mode. Then item IM has to be set to T. EX Exit Exit protection level. *) This item is not implemented in the XPU-2. Instruction manual Spot temperature and Analog output options Page 8

9 Spot temperature measurement 2.3 Operation 2.3. Display For operation of the display and the information on it (if applicable), refer to the instruction manual of the related level gauge or indicator. Below, only an overview is given which display formats gives information about the spot temperature measurement. Display format Displayed information A D Product level and temperature Product temperature and status Data items The table below lists a number 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 2.4). Item AP MU MQ Description Measured data Measured temperature (dimension according to item TD); the value is preceded by four characters from the temperature status item MQ. Measured test resistance (floating point format); must be: 66.5 W.3 %. Temperature status request (refer to section 2.4.2). VV Verification data Refer to description at section EM FH H Diagnostic data Error HCU / ICU_HPI request (refer to section 2.4.). Fatal HCU / ICU_HPI errors Last fatal HCU / ICU_HPI error Instruction manual Spot temperature and Analog output options Page 9

10 Spot temperature measurement 2.4 Troubleshooting 2.4. Temperature error request (item EM) This item contains the most recent temperature error encountered by the optional HCU / ICU_HPI board. xx No error, value at initialisation xx Counter error Hardware error. Reset instrument; if error persist, replace HCU or ICU_HPI board xx5 UTI time-out Possibly no supply on Spot circuit (blown fuse); replace HCU or ICU_HPI board xx29 R_cable error Resistance of B- and C-wire too high (maximum loop resistance: 24 Ω) xx3 Connection error Check the wiring connections of RTD to instrument xx34 R test error Hardware error. Reset instrument; if error persist, replace HCU or ICU_HPI board xx7 Wrong element configuration specified Check item MN (must be set to 3 or 4 ) xx98 No temperature sources found No RTD (and no VITO temperature probe) connected xx99 Spot option print not installed Change HCU or ICU_HPI board for the correct type xx: 28 for HSU / TPU-2 emulation 3 for HCU emulation Temperature status request (item MQ) The temperature status request item contains four status bytes (Byte, Byte, Byte 2, Byte 3) from the optional HCU / ICU_HPI board. For decoding, refer to the ASCII table in appendix A. Status byte : always Status byte : Status byte 2: bit : General HCU / HPI temperature fail bit : Last valid level used : Fail in spot temperature reading : Manual level used 2 : 2 : Level time-out 3 : Product level below RTD position 3 : 4 : 4 : 5 : 5 : Temperature out of range 6 : 6 : 7 : 7 : Status byte 3: bit : No previous store command -5 : 6 : 7 : Note: Only the bits which are set to have an active status. Instruction manual Spot temperature and Analog output options Page

11 Spot temperature measurement Temperature pointer value (item VV) By means of the value pointer (item VP) a vector can be loaded to the HCU or ICU_HPI option board. Next, with item VV, the selected data is returned. Item VP consists of 4 positions, in the middle separated by a. or, : v w. x y (or v w, x y). The values for the value pointer are listed in the table together with the obtained data. v w, x y Selected data Example / Dimension,,,, 2 3 HCU / ICU_HPI Emulation & Function Emulation: MPU, HSU, HPU, HCU Function: HC: HART channel installed AO: analog output ST: spot temperature MT: VITO average temperature WS: external water bottom probe WT: VITO water bottom probe PR: pressure transmitters Configuration boot code Sales code option: B boot code: U 25 Y 3F HCU / ICU_HPI hardware version Boot code software version VV=HCU HCAOST- - PR VV=HCU CONFIG: 3F VV=HW VERSION: VV=BOOTSW VERS:,,,, 2 5 Measured spot resistance Calculated spot temperature Measured cable resistance Temperature update counter (floating point format) (floating point format) (floating point format) Ω according to item TD Ω Item Name Description VP= Temperature value pointer Temperature value pointer; format: 2 digits, separator, 2 digits (refer to table above). Example: VP=.: value pointer loaded to request the measured spot resistance. VV Temperature pointer value Temperature pointer value. This item holds the value requested by item VP (refer to table above). Example: the requested measured spot resistance (standard floating point format). Instruction manual Spot temperature and Analog output options Page

12 Analog level output 3 Analog level output 3. Introduction The analog level output circuit is an option which can be installed on the HCU board. The HCU board is an option board for the 854 servo gauges and the 877 FDI. For the 97x SmartRadar, the analog level output is available with the optional ICU_HPO board. The analog output circuit on the HCU and ICU_HPO optional boards are galvanic separated from the gauge electronics. This section (analog level output) describes the settings for analog level output for both the HCU and ICU_HPO board. For the HART communication of the ICU_HPO board, refer to instruction manual 97x SmartRadar HART communication output. 3.. HCU analog output characteristics The analog output is passive, hence an external power supply is required. The voltage of the loop supply should be at least 2 Vdc, and may not exceed 64 Vdc (measured at the terminals of the gauge). The loop resistance is the total resistance from the loop, and hence includes supply output resistance, total cable resistance (including series resistor) and the input resistance from reader or analog input. To reduce the power dissipation on the HCU board, an external resistor must be wired in series with the loop in case the loop supply voltage is higher than 3 Vdc (refer to figure 3.A). The power rating of the external resistance depends on the value; we recommend: W/kW ICU_HPO analog output characteristics The analog output can be set either passive or active (refer to section 3.2.). When set to active, the supply voltage in the loop is: 2 Vdc (±5%). The voltage of the loop supply should be at least 8 Vdc, and may not exceed 64 Vdc (measured at the terminals of the gauge). Supply voltages over 3 Vdc require an external series resistor (refer to figure 3.B). Note: HART communication requires a minimum loop resistance of 25 W. The maximum loop resistance for HART communication is W. This implies that for HART communication the minimum supply voltage is 4 Vdc and the maximum supply voltage is 36 Vdc with a 25 W resistor. With a higher external supply voltage, the series resistor must be increased. With the maximum resistor for HART communication ( W), the maximum loop supply will be 57 Vdc. The power rating of the external resistance depends on the value; we recommend: W/kW. Instruction manual Spot temperature and Analog output options Page 2

13 Analog level output Figure 3. Supply voltage versus loop resistance for analog level output Instruction manual Spot temperature and Analog output options Page 3

14 Analog level output 3.2 Commissioning of analog level output 3.2. Setting of analog output 97x SmartRadar to active Setting the analog output loop to active or passive is done by selecting the correct connector on the ICU_HPO board. Standard, the 97x SmartRadar s are delivered with the analog output loop set as passive. Hence, an external supply voltage is required. When the analog loop should be set to active, the connector on the ICU_HPO board needs to be changed from position. That procedure is described below. Switch off mains power from the 97x SmartRadar; 2 Open electronic compartment cover; 3 Locate the ICU_HPO board (refer to figure 3.2); 4 Loosen the cable connector from connector CN (passive), and plug it into CN 2 (active); 5 Close electronic compartment cover; 6 Apply mains power. Figure 3.2 Changing over from passive to active analog output loop supply The commissioning of the optional analog level output part of the HCU / ICU_HPO board should be performed after the basic commissioning of the level gauge or indicator. Instruction manual Spot temperature and Analog output options Page 4

15 Analog level output Analog output settings Item Name Description W= Protection level Enter protection level AM= Analog 4 ma level AN= Analog 2 ma level AK= Analog output mode Format according to item LD (default: +. m). Enter in this item the level value which must correspond with the current of 4 ma Format according to item LD (default: +. m). Enter in this item the level value which must correspond with the current of 2 ma Note: The value in item AM can be considered as offset ; The value of (AN - AM) can be considered as span. One character, default set to: D (analog output disabled). Via this item is selected under what conditions the analog output current will operate; see table: Item AK Valid level Invalid level Level fail Time-out / start-up D A nalog output disabled O P I o = <AF> (overwrite mode) I o = 3.5 ma (during start-up) I o = 22 ma (during start-up) L M I o = <AL> I o = <LV> If no <LV> I o = 3.5 ma I o = 22 ma I o = 3.5 ma I o = 22 ma A B I J I o = <AL> I o = <AL> I o = 3.5 ma I o = 22 ma I o = 3.5 ma I o = 22 ma EX Exit Exit protection level. <AF> : value given by item AF in analog output overwrite mode <AL> : actual level value <LV> : last valid level value I o : output current Note: The setting D should not be used with the 97x SmartRadar. Note: With the 97x SmartRadar it is possible to write values with the HART communicator for PV LRV and PV URV, which will be stored locally on the ICU_HPO board and used in stead of resp. items AM and AN. Instruction manual Spot temperature and Analog output options Page 5

16 Analog level output Calibrate analog output circuit Calibration of the analog output circuit is necessary when the XPU NOVRAM is (re)formatted and the items could not be down loaded from a log file or when a new HCU / ICU_HPO board is installed. Of course, calibration can also be performed as a routine to be sure having a good signal. Connect a power supply (5-24 Vdc) and an accurate ma meter (accuracy better than ma) to the instrument (refer to figure 3.3). Note: The 97x SmartRadar can be set to active. Then no external power supply is required. Figure 3.3 Test loop for calibrating analog output circuit The procedure described below can be used with the HCU board in the 854 servo gauges and 877 FDI. For the 97x SmartRadar with the ICU_HPO board, this procedure can only be used via the HART communication using the service tool Ensite or Engauge. Item Name Description W= Protection level Enter protection level A5 Calibrate 4 ma With this command a current of approximately 4 ma will flow through the loop. Read the current indicated by the ma meter. A3= Analog 4 ma Floating point format; units: ma. Enter in this item the reading from the ma meter under the condition of command A5 (appr. 4 ma). A6 Calibrate 8 ma With this command a current of approximately 8 ma will flow through the loop. Read the current indicated by the ma meter. A4= Analog 8 ma Floating point format; units: ma. Enter in this item the reading from the ma meter under the condition of command A6 (appr. 8 ma). EX Exit Exit protection level. From ICU_HPO software version A. and higher, the 97x SmartRadar has an alternative item for the calibration of the analog output. Instruction manual Spot temperature and Analog output options Page 6

17 Analog level output Item Name Description W= Protection level Enter protection level AE=+.4E+ 4 ma With this data item a current of approximately 4 ma will flow through the loop. Read the current indicated by the ma meter. A3= Analog 4 ma Floating point format; units: ma. Enter in this item the reading from the ma meter under the condition with item AE set to 4 ma. AE=+.8E+2 ma With this data item a current of approximately 8 ma will flow through the loop. Read the current indicated by the ma meter. A4= Analog 8 ma Floating point format; units: ma. Enter in this item the reading from the ma meter under the condition with item AE set to 8 ma. EX Exit Exit protection level. Instruction manual Spot temperature and Analog output options Page 7

18 Analog level output Verify output current The analog output current can be verified by the same test set-up as in figure 3.3. The procedure described below can be used with the HCU board in the 854 servo gauges and 877 FDI. For the 97x SmartRadar with the ICU_HPO board, this procedure can only be used via the HART communication using the service tool Ensite or Engauge. Item Name Description W= Protection level Enter protection level AK= Analog output mode Set analog output in overwrite mode: O EX Exit Exit protection level. Item Name Description AF= Analog output overwrite Floating point format; units: ma. Enter in this item a current value which you want to verify on the ma meter. Minimum value: 3.5 ma, maximum value: 22 ma. The current value, entered in item AF, should be indicated on the ma meter. It may not differ more than 2 ma. One or more current values can be verified by means of item AF. When ready, set item AK back to its original setting: Item Name Description W= Protection level Enter protection level AK= Analog output mode Set item AK back to its original setting (refer to section 3.2.2). EX Exit Exit protection level. From ICU_HPO software version A. and higher, the 97x SmartRadar has an alternative item for the verification of the analog output. Item Name Description W= Protection level Enter protection level AE= Analog output overwrite Floating point format; units: ma. Enter in this item a current value which you want to verify on the ma meter. Minimum value: 3.5 ma, maximum value: 22 ma. The current value, entered in item AE, should be indicated on the ma meter. It may not differ more than 2 ma. The output current holds the value till another value is given in item AE or the verification is ended by means of an exit command. EX Exit Exit protection level. Instruction manual Spot temperature and Analog output options Page 8

19 Analog level output 3.3 Operation 3.3. Display For operation of the display and the information on it, refer to the instruction manual of the applicable level gauge or 877 FDI. Below, only an overview is given which display format gives information about the analog level output. Display format J Displayed information Analog level output Note: There is no display format J on the 97x SmartRadar, as the ICU_HPO board is not connected to the internal IPC communication bus Data items Below, a summary is given of the available data items and error codes. Item AO AQ Description Measured / calculated data Actual analog output current (floating point format; units: ma) This value is preceded by one status character of item AQ (only with HCU board in 854/877) Actual analog output status (refer to section 3.4.2) (only with HCU board in 854/877) VV Verification data Refer to description at section (only with HCU board in 854/877) EA OA OF FO Diagnostic data Error analog output request (only with HCU board in 854/873/877) (refer to section 3.4.) Communication board (ICU_HPO) actual status (only in 97x) (refer to section 3.4.4) Communication board (ICU_HPO) last encountered fatal error (only in 97x) (refer to section 3.4.5) Communication board (ICU_HPO) fatal error counter (only in 97x) Instruction manual Spot temperature and Analog output options Page 9

20 Analog level output 3.4 Troubleshooting 3.4. Analog output error request (item EA) This item contains the most recent analog output error encountered by the HCU board. xx No error, value at initialization xx5 Not calibrated Items A3 and/or A4 are not set correctly (default: +.E+) xx6 Upper / lower range error Items AM and/or AN are not set correctly (both equal value?) xx2 DAC read-back error Internal error, try to resolve with RS command (or power off/on). If error persists, change HCU board xx99 Analog output option board not installed Change HCU board for the correct type xx : 22 for MPU emulation 3 for HCU emulation Analog output status request (item AQ) Only valid with the HCU board in the 854 servo gauge or 877 FDI. The actual analog output status is one character which can be divided into two data fields: the output status (4 bits: os ) and the output value status ( bit: ov ) Output value status (b 4 ): : within 4-2 ma range : out of 4-2 ma range AQ : b 7 b 6 b 5 b 4 b 3 b 2 b b ov os os os os Output status (b 3, b 2, b, b ): b 3 b 2 b b Analog output status Setting of item AK Error code on display valid product level used last valid product level used invalid level used no valid product level available no last valid level available no level available level time-out invalid level level failure analog output general fail analog output disabled overwrite value used no overwrite value available calibration mode entered L, M, A, B, I, J L, M A, B I, J L, M A, B L, M, A, B, I,J I, J A, B, I, J - - D O, P O, P L, M, A, B, I, J - - LV IL NL NL NL TO IL LF FL DA OV NV CA Instruction manual Spot temperature and Analog output options Page 2

21 Analog level output Analog output pointer (items VP and VV) Only valid with the HCU board in the 854 servo gauge or 877 FDI. By means of the value pointer (item VP) a vector can be loaded to the HCU option board. Next, with item VV, the selected data is returned. Item VP consists of 4 positions, in the middle separated by a. or, : v w. x y (or v w, x y). The values for the value pointer are listed in the table together with the obtained data. v w, x y Selected data Example / Dimension,,,, 2 3 HCU / ICU_HPI Emulation & Function Emulation: MPU, HSU, HPU, HCU Function: HC: HART channel installed AO: analog output ST: spot temperature MT: VITO average temperature WS: external water bottom probe WT: VITO water bottom probe PR: pressure transmitters Configuration boot code Sales code option: V boot code: W A X 2 Y 3F HCU / ICU_HPI hardware version Boot code software version VV=HCU HCAOST VV=HCU CONFIG: 3F VV=HW VERSION: VV=BOOTSW VERS: Item Name Description VP= Analog output value pointer Analog output pointer; format: 2 digits, separator, 2 digits (refer to table above). Example: VP=.: value pointer loaded to request the emulation and functions. VV Analog output pointer value Analog output pointer value. This item holds the value requested by item VP (refer to table above). Example: the requested emulation and functions. Instruction manual Spot temperature and Analog output options Page 2

22 Analog level output Communication board (ICU_HPO) actual status (item OA) Only valid with the ICU_HPO board in the 97x SmartRadar. Item OA contains the actual status of the ICU_HPO board, 3 seconds after startup. The first 3 seconds after initialization (EX, or RS command or power on) this item contains the ICU_HPO software version. OK No error encountered ER ICU (XPU-part) not found Bad or no communication between ICU board and ICU_HPO board. Check ER ICU (XPU-part) not responding connector between those boards, else change either of the boards ER2 ICU (XPU-part) answer with error ER2 DAC error Internal error; try to resolve with RS command (or power off/on). If error persists, change ICU_HPO board ER2 not calibrated Items A3 and/or A4 are not set correctly (default: +.E+) ER3 NOVRAM checksum error ER3 NOVRAM access error Internal error on ICU_HPO board. Change ICU_HPO board ER4 code checksum error ER5 RAM error Communication board (ICU_HPO) last encountered fatal error (item OF) Only valid with the ICU_HPO board in the 97x SmartRadar. This item holds the last encountered fatal error code of the ICU_HPO board. no errors encountered cmx errors These errors are fatal software errors and should not occur. 2 program errors If they do occur and are not resolved by resetting the instrument, replace the 3 interrupt errors ICU_HPO board (inclusive ICU_HPO EPROM). 4 watchdog errors Instruction manual Spot temperature and Analog output options Page 22

23 Appendix Appendix A ASCII table Instruction manual Spot temperature and Analog output options Page 23

24 Appendix Appendix B Part numbers For 854 ATG / 854 XTG / 877 FDI: HCU board functionality Part no. Spot temperature Pt Spot temperature Pt + HART device(s) Analog level output Analog level output + VITO temperature and/or water probe Analog level output + VITO temperature probe Analog level output + Spot temperature Pt + VITO temperature and/or water probe + HART device(s) For 97x SmartRadar: ICU_HPI board functionality Part no. Spot temperature Pt Spot temperature Pt + HART device(s) Spot temperature Pt + VITO temperature and/or water probe + HART device(s) ICU_HPO board functionality Part no. Analog level output and HART communication Instruction manual Spot temperature and Analog output options Page 24

25 Appendix Appendix C 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 Instruction manual HIMS / HTG and vapour pressure (P3) measurement Instruction manual Spot temperature and Analog output options Page 25

26 Instruction manual Spot temperature and Analog output options Page 26 Notes

27 Notes Instruction manual Spot temperature and Analog output options Page 27

28 Instruction manual Spot temperature and Analog output options Page 28 Notes