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Emerson Rosemount 644 with HART Protocol, Справочное руководство

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18

Reference Manual

00809-0200-4728, Rev SA

Configuration

July 2018

Configuration

Note

If Sensor 1 and/or Sensor 2 should fail while PV is configured for average temperature and Hot Backup is 
not enabled, the transmitter will go into alarm. For this reason, it is recommended when PV is Sensor 
Average, that Hot Backup be enabled when dual-element sensors are used, or when two temperature 
measurements are taken from the same point in the process. If a sensor failure occurs when Hot Backup 
is enabled, while PV is Sensor Average, three scenarios could result:

If Sensor 1 fails, the average will only be reading from Sensor 2, the working sensor

If Sensor 2 fails, the average will only be reading from Sensor 1, the working sensor

If both sensors fail simultaneously, the transmitter will go into alarm and the status available (via 

HART) states that both Sensor 1 and Sensor 2 have failed

In the first two scenarios, the 4–20 mA signal is not disrupted and the status available to the control 
system (via HART) specifies which sensor has failed.

2.7.3

Hot Backup configuration

The Hot Backup feature configures the transmitter to automatically use Sensor 2 as the primary sensor if 
Sensor 1 fails. With Hot Backup enabled, the primary variable (PV) must either be first good or average. 
See the “NOTE” directly above for details on using Hot Backup when the PV is set to Average. 

Sensors 1 or 2 can be mapped as the secondary variable (SV), tertiary variable (TV), or quaternary 
variable (QV). In the event of a primary variable (Sensor 1) failure, the transmitter enters Hot Backup 
mode and Sensor 2 becomes the PV. The 4–20 mA signal is not disrupted, and a status is available to the 
control system through HART that Sensor 1 has failed. An LCD display, if attached, displays the failed 
sensor status.

While configured to Hot Backup, if Sensor 2 fails but Sensor 1 is still operating properly, the transmitter 
continues to report the PV 4–20 mA analog output signal, while a status is available to the control 
system through HART that Sensor 2 has failed. 

Resetting Hot Backup

In Hot Backup mode, if Sensor 1 does fail and Hot Backup is initiated, the transmitter will not revert back 
to Sensor 1 to control the 4–20 mA analog output until the Hot Backup mode is reset by re-enabling 
through HART, re-setting it through the LOI or by briefly powering down the transmitter.

Field Communicator

The field communicator will walk you through a method to correctly configure the necessary elements 
of the Hot Backup feature.

From the 

HOME

 screen, enter the Fast Key sequence.

AMS Device Manager

1. Right click on the device and select 

Configure

.

2. In the left navigation pane select 

Manual Setup

. 

3. On the 

Diagnostics Tab

 find the 

Hot Backup

 group box.

4. Choose the button 

Configure Hot Backup

 or 

Reset Hot Backup

 depending on the desired function 

and walk through the guided steps.

5. Select 

Apply 

when complete.

Device Dashboard Fast Keys

2, 1, 5

Содержание Rosemount 644 with HART Protocol

Страница 1: ...Reference Manual 00809 0200 4728 Rev SA July 2018 Rosemount 644 Temperature Transmitter with HART Protocol ...

Страница 2: ......

Страница 3: ...rify configuration 9 2 5 1 Field Communicator 9 2 5 2 AMS Device Manager 10 2 5 3 LOI 10 2 5 4 Checking transmitter output 10 2 6 Basic configuration of the transmitter 12 2 6 1 Mapping the HART variables 12 2 6 2 Configuring the sensor s 13 2 6 3 Setting output units 14 2 7 Configure dual sensor options 15 2 7 1 Differential temperature configuration 16 2 7 2 Average temperature configuration 17 ...

Страница 4: ...stablishing multi drop communication 35 2 12 1 Changing a transmitter address 35 2 13 Using the transmitter with the HART Tri Loop 36 2 13 1 Set the transmitter to burst mode 36 2 13 2 Set process variable output order 37 2 14 Transmitter security 38 2 14 1 Available security options 38 3Section 3 Hardware Installation 3 1 Overview 41 3 2 Safety messages 42 3 3 Considerations 42 3 3 1 General 42 3...

Страница 5: ...near offset single point trim solution 67 5 4 2 Application Linear offset and slope correction two point trim 67 5 4 3 Recall factory trim sensor trim 68 5 4 4 Active calibrator and EMF compensation 69 5 5 Trim the analog output 69 5 5 1 Analog output trim or scaled analog output trim 69 5 5 2 Analog output trim 70 5 5 3 Performing a scaled output trim 71 5 6 Transmitter sensor matching 71 5 7 Swi...

Страница 6: ...sive proof test 2 84 7 5 4 Comprehensive proof test 3 84 7 5 5 Inspection 85 7 6 Specifications 85 7 6 1 Failure rate data 85 7 6 2 Failure values 85 7 6 3 Product life 85 AAppendix A Reference Data A 1 Product Certifications 87 A 2 Ordering Information Specifications and Drawings 87 BAppendix B Field Communicator Menu Trees and Fast Keys B 1 Field Communicator menu trees 89 B 2 Field Communicator...

Страница 7: ... cause inaccurate readings For information on Rosemount nuclear qualified products contact a Emerson Sales Representative Failure to follow these installation guidelines could result in death or serious injury Make sure only qualified personnel perform the installation Explosions could result in death or serious injury Do not remove the connection head cover in explosive atmospheres when the circu...

Страница 8: ...vi Reference Manual 00809 0200 4728 Rev SA Title Page July 2018 Title Page ...

Страница 9: ...llation instructions and considerations for the transmitter Section 5 Operation and Maintenance contains common operation and maintenance techniques for the transmitter Section 6 Troubleshooting provides troubleshooting techniques for the most common transmitter operating problems Section 7 Safety Instrumented Systems SIS Certification provides identification installation configuration operation a...

Страница 10: ...hat allow for mounting flexibility in a variety of environmental conditions The Rosemount 644 Field Mount is available in an aluminum housing Special dual sensor features include Hot Backup Sensor Drift Alert first good differential and average temperature measurements and four simultaneous measurement variable outputs in addition to the analog output signal Additional advanced features include Th...

Страница 11: ...ains information on commissioning and tasks that should be performed on the bench prior to installation Field Communicator AMS Device Manager and Local Operator Interface LOI instructions are given to perform configuration functions For convenience Field Communicator Fast Key sequences are labeled Fast Keys and abbreviated LOI menus are provided for each function below The LOI is only available on...

Страница 12: ...les are loaded on your systems to ensure proper communications Download the latest Device Driver at Emerson com Rosemount or Fieldcomm org Failure to follow these installation guidelines could result in death or serious injury Make sure only qualified personnel perform the installation Explosions could result in death or serious injury Do not remove the connection head cover in explosive atmospher...

Страница 13: ...es a power supply a digital multimeter DMM and Field Communicator AMS Device Manager or a LOI option M4 Connect the equipment as shown in Figure 2 1 Connect HART Communication leads at any termination point in the signal loop To ensure successful HART Communication a resistance of at least 250 Ohms must be present between the transmitter and the power supply Connect the Field Communicator leads to...

Страница 14: ...not make connections to the serial port or the Ni Cad recharger jack in explosive atmospheres Before connecting the Field Communicator in an explosive atmosphere make sure the instruments in the loop are installed in accordance with intrinsically safe or non incendive field wiring practices There are two interfaces available with the Field Communicator Traditional and Dashboard interfaces All step...

Страница 15: ...on com Rosemount or Fieldcomm org Note All steps listed in this product manual using AMS Device Manager assume the use of Version 11 5 LOI The LOI requires option code M4 to be ordered To activate the LOI push either configuration button Configuration buttons are located on the LCD display must remove housing cover to access the interface See Table 2 2 for configuration button functionality and Fi...

Страница 16: ...ging this prompt does not set the loop to manual The prompt is only a reminder set the loop to manual as a separate operation 2 4 4 Failure mode As part of normal operation each transmitter continuously monitors its own performance This automatic diagnostics routine is a timed series of checks repeated continuously If diagnostics detect an input sensor failure or a failure in the transmitter elect...

Страница 17: ...figuration tool Depending on what configuration tool s are available follow the steps listed relevant to each tool 2 5 1 Field Communicator Configuration parameters listed in Table 2 3 below are the basic parameters that should be reviewed prior to transmitter installation A full list of configuration parameters that can be reviewed and configured using a Field Communicator are located in Appendix...

Страница 18: ...configured to the appropriate process variables Checking or setting process variables The Process Variables menu displays process variables including sensor temperature percent of range analog output and terminal temperature These process variables are continuously updated The default primary variable is Sensor 1 The secondary variable is the transmitter terminal temperature by default Field Commu...

Страница 19: ... appears Snsr 1 must be selected The Rosemount 644 Transmitter dual sensor option configuration screens allow selection of the Primary Variable PV Secondary Variable SV Tertiary Variable TV and Quaternary Variable QV Variable choices are Sensor 1 Sensor 2 Differential Temperature Average Temperature Terminal Temperature and Not Used The 4 20 mA analog signal represents the Primary Variable From th...

Страница 20: ...iguration of all necessary settings associated with configuring a sensor including For a full list of Sensor Types available with the Rosemount 644 Transmitter and their associated levels of accuracy From the HOME screen enter the Fast Key sequence AMS Device Manager 1 Right click on the device and select Configure 2 In the left navigation pane select Manual Setup and select the Sensor 1or Sensor ...

Страница 21: ...r and the LOI To utilize this feature properly perform the following steps 1 Measure the lead wire resistance of both RTD leads after installing the 2 wire RTD and Rosemount 644 Transmitter 2 Navigate to the 2 wire RTD Offset parameter 3 Enter the total measured resistance of the two RTD leads at the 2 wire Offset prompt to ensure proper adjustment The transmitter will adjust its temperature measu...

Страница 22: ...ght click on the device and select Configure 2 In the left navigation pane select Manual Setup The unit fields for various variables are spread over the Manual Setup tabs click through the tabs and change the desired units 3 Select Apply when complete LOI Reference the below image for where to find the Units configuration in the LOI menu Figure 2 6 Configuring Units with LOI Available only if opti...

Страница 23: ...nsmitter ordered and configured for dual sensors can accept any two inputs then display the differential temperature between them Use the following procedures to configure the transmitter to measure differential temperature Note This procedure assumes the differential temperature is a calculated output of the device but does not re assign it as the primary variable If it desired for Differential t...

Страница 24: ...e following procedures to configure the transmitter to measure the average temperature Note This procedure assumes the average temperature is a calculated output of the device but does not re assign it as the primary variable If it is desired for average to be the transmitter s primary variable see Mapping the HART variables on page 11 to set it to PV Field Communicator From the HOME screen enter ...

Страница 25: ...s S and DC are both ordered or if option codes D and DC are both ordered Figure 2 10 Configuring Average Damping with LOI Available only if option code S or D is ordered Available only if option codes S and DC are both ordered or if option codes D and DC are both ordered CHANGE ALL SENSOR 1 UNITS SENSOR 2 UNITS DIFFRNTL UNITS AVERAGE UNITS AVERAGE UNITS 1ST GOOD UNITS BACK TO MENU EXIT MENU DEG C ...

Страница 26: ...set to Average Sensors 1 or 2 can be mapped as the secondary variable SV tertiary variable TV or quaternary variable QV In the event of a primary variable Sensor 1 failure the transmitter enters Hot Backup mode and Sensor 2 becomes the PV The 4 20 mA signal is not disrupted and a status is available to the control system through HART that Sensor 1 has failed An LCD display if attached displays the...

Страница 27: ...nits between sensor 1 and sensor 2 If this maximum difference is exceeded a sensor drift alert warning flag will be set Though it defaults to WARNING when configuring the transmitter for sensor drift alert the user also has the option of specifying the analog output of the transmitter go into ALARM when sensor drifting is detected Note Using dual sensor configuration in the Rosemount 644 Transmitt...

Страница 28: ...lue for drift alert damping all separately Reference figure below for where to find these in the menu Figure 2 12 Configuring Sensor Drift Alert with LOI Available only if option code S or D is ordered Available only if option codes S and DC are both ordered or if option codes D and DC are both ordered Note Enabling the drift alert option to WARNING will set a flag through the HART communications ...

Страница 29: ...ough the re range function matches a sensor input to a 4 20 mA output as in conventional calibration it does not affect the transmitter s interpretation of the input Select from one of the methods below to re range the transmitter Field Communicator From the HOME screen enter the Fast Key sequence AMS Device Manager 1 Right click on the device and select Configure 2 In the left navigation pane sel...

Страница 30: ...y 500 milliseconds for a single sensor device and outputs values according to the following relationship P previous damped value N new sensor value T damping time constant U update rate At the value to which the damping time constant is set the transmitter output is at 63 percent of the input change and it continues to approach the input according to the damping equation above For example as illus...

Страница 31: ...ence AMS Device Manager 1 Right click on the device and select Configure 2 In the left navigation pane select Manual Setup 3 On the Sensor 1 Tab find the Setup group box 4 Change the Damping Value to the desired setting 5 Select Apply when complete LOI Reference the figure below to find the damping configuration path on the LOI HART 5 HART 7 Device Dashboard Fast Keys 2 2 1 5 2 2 1 6 CALIBRAT DAMP...

Страница 32: ...ations exist for custom levels The low alarm value must be less than the Low Saturation level The high alarm value must be higher than the High Saturation level Alarm and Saturation levels must be separated by at least 0 1 mA The configuration tool will provide an error message if the configuration rule is violated See table below for the common alarm and saturation levels Note Transmitters set to...

Страница 33: ...on codes D and DC are both ordered 2 8 4 Configuring the LCD display The LCD display configuration command allows customization of the LCD display to suit application requirements The LCD display will alternate between the selected items with each item displaying for a three seconds interval Reference Figure 2 16 to view the differences between the LCD display and LOI options available with the Ro...

Страница 34: ...t Configure 2 In the left navigation pane select Manual Setup 3 On the Display Tab there will be a group box with all available variables that can be displayed 4 Check and uncheck the desired display variables with a checked box indicating that the variable will be displayed 5 Select Apply when complete LOI Reference Figure 2 17 to find the LCD display value configuration path on the LOI LCD displ...

Страница 35: ... up The Tag is up to eight characters and the Long Tag a parameter introduced with the HART 6 and 7 protocol was extended to 32 characters long Neither parameter has any impact on the primary variable readings of the transmitter it is only for information The Date is a user defined variable that provides a place to save the date of the last revision of configuration information It has no impact on...

Страница 36: ...he tag configuration path in the LOI Figure 2 18 Configuring the Tag with LOI 2 10 Configure measurement filtering 2 10 1 50 60 Hz filter The 50 60 Hz Filter also known as Line Voltage Filter or AC Power Filter function sets the transmitter electronic filter to reject the frequency of the AC power supply in the plant The 60 or 50 Hz mode can be chosen The factory default for this setting is 50 Hz ...

Страница 37: ... sensor detection feature switched ON and the threshold value set at 0 2 of sensor limits The intermittent sensor detect feature can be switched ON or OFF and the threshold value can be changed to any value between 0 and 100 percent of the sensor limits with a Field Communicator When the intermittent sensor detection feature is switched ON the transmitter can eliminate the output pulse caused by i...

Страница 38: ... Tab there will be a group box called Noise Rejection in the box Transient Filter Threshold enter the desired percent 4 Select Apply when complete 2 10 4 Open sensor hold off The open sensor hold off option at the normal setting enables the 644 to be more robust under heavy EMI conditions This is accomplished by the software having the transmitter perform additional verification of the open sensor...

Страница 39: ... Right click on the device and select Service Tools 2 In the left navigation pane select Simulate 3 On the Simulate Tab find the Perform Loop Test button in the Analog Output Verification group box 4 Follow the guided instructions and select Apply when complete LOI Reference the Figure 2 19 to find the path to the loop test in the LOI menu Figure 2 19 Performing a Loop Test with the LOI 2 11 2 Sim...

Страница 40: ...ff the difference between these values This feature is not intended to be a precise measurement of thermocouple status but is a general indicator of thermocouple and thermocouple loop health Thermocouple diagnostic must be Enabled as well as connected and configured to read a thermocouple type sensor Once the diagnostic has been activated a baseline resistance value is calculated Then a Trigger th...

Страница 41: ...ated Baseline resistance The resistance of the thermocouple loop obtained after installation or after resetting the baseline value The trigger level may be calculated from the baseline value Reset baseline resistance Launches a method to recalculate the Baseline value which may take several seconds TC diagnostic mode sensor 1or 2 This field will read either enabled or disabled indicating when the ...

Страница 42: ...m and maximum values may be reset individually Once a particular field has been reset the previous values are overwritten Field Communicator From the HOME screen enter the Fast Key sequence AMS Device Manager 1 Right click on the device and select Configure 2 In the left navigation window select Manual Setup 3 On the Diagnostics tab there is a group box labeled Sensor and Process Diagnostics selec...

Страница 43: ...ue address 1 15 and responds to the commands defined in the HART protocol A HART based Communicator can test configure and format a multi dropped transmitter the same as in a standard point to point installation Note Multi drop is not suitable for safety certified applications and installations Figure 2 23 Typical Multi Dropped Network Note Rosemount 644 Transmitters are set to address 0 at the fa...

Страница 44: ...oop The HART Tri Loop divides the signal into separate 4 20 mA loops for up to three of the following choices Primary Variable PV Secondary Variable SV Tertiary Variable TV Quaternary Variable QV When using the Rosemount 644 Transmitter with dual sensor option in conjunction with the HART Tri Loop consider the configuration of the differential average first good temperatures Sensor Drift Alert and...

Страница 45: ...feature of a dual sensor 644 operating in conjunction with the HART Tri Loop adjust the range end points of the corresponding channel on the HART Tri Loop to include zero For example if the secondary variable is to report the differential temperature configure the transmitter accordingly see Mapping the HART variables on page 11 and adjust the corresponding channel of the HART Tri Loop so one rang...

Страница 46: ... the output could saturate low if the reading from Sensor 2 exceeds the reading from Sensor 1 By placing a zero in the middle of the range the output will normally stay near 12 mA and the problem will be avoided 5 Configure the DCS so that TV 100 C or TV 100 C indicates a sensor failure and for example TV 3 C or TV 3 C indicates a drift alert See Figure 2 24 Figure 2 24 Tracking Sensor Drift and S...

Страница 47: ...er the Fast Key sequence AMS Device Manager 1 Right click on the device and select the Configure menu 2 In the left navigation pane select Manual Setup then select the Security tab All three parameters can be configured from this screen 3 Select Apply when complete Write Protect 2 2 9 1 HART Lock 2 2 9 2 LOI Password 2 2 9 3 ...

Страница 48: ...40 Reference Manual 00809 0200 4728 Rev SA Configuration July 2018 Configuration ...

Страница 49: ...ith the hazardous location certifications Once a device labeled with multiple approval types is installed it should not be reinstalled using any of the other labeled approval types To ensure this the approval label should be permanently marked to distinguish the approval type s used 3 1 Overview The information in this section covers installation considerations for the Rosemount 644 Temperature Tr...

Страница 50: ...ctices 3 3 3 Installation Measurement accuracy depends upon proper installation of the transmitter Mount the transmitter close to the process and use minimum wiring to achieve best accuracy Keep in mind the need for easy access personnel safety practical field calibration and a suitable transmitter environment Install the transmitter to minimize vibration shock and temperature fluctuation Failure ...

Страница 51: ...ly sealed within a plastic enclosure resisting moisture and corrosive damage Verify that the operating atmosphere of the transmitter is consistent with the appropriate hazardous locations certifications Temperature effects The transmitter will operate within specifications for ambient temperatures between 40 and 185 F 40 C and 85 C Heat from the process is transferred from the thermowell to the tr...

Страница 52: ... 73 F A 6 0 in 152 4 mm extension length R 10 C 50 F offers a higher safety margin 35 C 95 F and reduces temperature effect errors but would probably require extra transmitter support Gauge the requirements for individual applications along this scale If a thermowell with lagging is used the extension length may be reduced by the length of the lagging 3 4 Installation procedures Figure 3 2 Install...

Страница 53: ...dware alarm switch to the desired position H indicates High L indicates Low Then reattach the housing cover See Figure 3 3 below for alarm switch location 4 Apply power and set the loop to automatic control Figure 3 3 Failure Switch Location A Alarm switch Note If using an LCD Display or LOI first remove the display by detaching it from the top of the device set the switch to the desired position ...

Страница 54: ...y mounted on a sensor or apart from a sensor assembly using an optional bracket The Rosemount 644 Rail Mount attaches directly to a wall or to a DIN rail Mounting a Rosemount 644 Head Mount to a DIN rail To attach a head mount transmitter to a DIN rail assemble the appropriate rail mounting kit part number 00644 5301 0010 to the transmitter as shown in Figure 3 5 Follow the procedure under Field m...

Страница 55: ...ntry 7 Insert the shielded cable leads into the connection head through the conduit entry 8 Connect the shielded power cable leads to the transmitter power terminals Avoid contact with sensor leads and sensor connections Connect and tighten the cable gland 9 Install and tighten the connection head cover Enclosure covers must be fully engaged to meet explosion proof requirements Head mount transmit...

Страница 56: ...t protector requires the use of an enclosure of at least 3 5 in 89 mm in diameter 6 Pull the sensor wiring leads through the universal head and transmitter Mount the transmitter in the universal head by threading the transmitter mounting screws into the universal head mounting holes 7 Seal adapter threads with thread sealant 8 Pull the field wiring leads through the conduit into the universal head...

Страница 57: ...d for severe environments or to satisfy code requirements 5 Verify the transmitter failure mode switch is in the desired position 6 Mount the transmitter sensor assembly into the thermowell or remote mount if desired 7 Seal adapter threads with silicone tape 8 Pull the field wiring leads through the conduit into the field mount housing Wire the sensor and power leads to the transmitter Avoid conta...

Страница 58: ...ssembly to the thermowell 4 Attach and connect sufficient lengths of sensor lead wire from the connection head to the sensor terminal block 5 Tighten the connection head cover Enclosure covers must be fully engaged to meet explosion proof requirements 6 Run sensor lead wires from the sensor assembly to the transmitter 7 Verify the transmitter failure mode switch 8 Attach the sensor wires to the tr...

Страница 59: ...to the transmitter 8 Attach and tighten the connection head cover Enclosure covers must be fully engaged to meet explosion proof requirements 9 Set the transmitter failure mode switch 10 Attach the sensor wires to the transmitter 3 4 4 Multichannel installations In a HART installation several transmitters can be connected to a single master power supply as shown in Figure 3 6 In this case the syst...

Страница 60: ...ing transmitter operation Transmitters ordered with the LCD display are shipped with the meter installed After market installation of the meter can be performed After market installation requires the meter kit which includes LCD display assembly includes LCD display meter spacer and two screws Meter cover with O ring in place Figure 3 7 Display Connection Rosemount 644 Transmitter Rosemount 644 Fi...

Страница 61: ...t in the location that will result in the desired viewing orientation 3 Reattach the meter to the meter spacer using the screws If the meter was rotated 90 degrees from its original position it will be necessary to remove the screws from their original holes and re insert them in the adjacent screws holes 4 Line up the connector with the pin socket and push the meter into the transmitter until it ...

Страница 62: ...54 Reference Manual 00809 0200 4728 Rev SA Installation July 2018 Installation ...

Страница 63: ...er the signal wiring Use ordinary copper wire of sufficient size to ensure the voltage across the transmitter power terminals does not drop below 12 0 Vdc If the sensor is installed in a high voltage environment and a fault condition or installation error occurs the sensor leads and transmitter terminals could carry lethal voltages Use extreme caution when making contact with the leads and termina...

Страница 64: ... 6 on page 14 when making sensor connections The sensor wiring diagram is located on the device s top label below the terminal screws See Figure 4 1 and Figure 4 2 for where to find and how to correctly wire all sensor types to the Rosemount 644 Transmitter Figure 4 1 Wiring Diagram Location 4 3 1 Sensor connections The Rosemount 644 Transmitter is compatible with a number of RTD and thermocouple ...

Страница 65: ...onnected and insulated with electrical tape Thermocouple or millivolt inputs The thermocouple can be connected directly to the transmitter Use appropriate thermocouple extension wire if mounting the transmitter remotely from the sensor Make millivolt inputs connections with copper wire Use shielding for long runs of wire HART Head Mount HART Rail Mount Fieldbus PROFIBUS HART Field Mount 1 2 wire R...

Страница 66: ...ad wires will make a 3 wire RTD installation as accurate as possible A 2 wire sensor will produce the largest error because it directly adds the lead wire resistance to the sensor resistance For 2 and 3 wire RTDs an additional lead wire resistance error is induced with ambient temperature variations The table and the examples shown below help quantify these errors Note For HART transmitters the us...

Страница 67: ...sor shielding The currents in the leads induced by electromagnetic interference can be reduced by shielding Shielding carries the current to ground and away from the leads and electronics If the ends of the shields are adequately grounded only a small amount of current will actually enter the transmitter If the ends of the shield are left ungrounded voltage is created between the shield and the tr...

Страница 68: ...d be Trimmed close and insulated from touching the transmitter housing Connected to the next shield if cable is routed through a junction box Connected to a good earth ground at the power supply end Ungrounded thermocouple mV Ohm and RTD inputs Each process installation has different requirements for grounding Use the grounding options recommended by the facility for the specific sensor type or be...

Страница 69: ...und point 5 Connect shields together electrically isolated from the transmitter Option 3 1 Ground sensor wiring shield at the sensor if possible 2 Ensure the sensor wiring and signal wiring shields are electrically isolated from the transmitter housing 3 Do not connect the signal wiring shield to the sensor wiring shield 4 Ground signal wiring shield at the power supply end A Sensor wires B Transm...

Страница 70: ...l for each sensor input The transmitter can be configured to output four of the six following digital process variables Sensor 1 Sensor 2 Differential temperature Average temperature First good temperature Transmitter terminal temperature The HART Tri Loop reads the digital signal and outputs any or all of these variables into as many as three separate 4 20 mA analog channels Refer to Figure 2 6 o...

Страница 71: ...ation The DC power supply should provide power with less than two percent ripple The total resistance load is the sum of the resistance of the signal leads and the load resistance of any controller indicator or related piece of equipment in the loop Note that the resistance of intrinsic safety barriers if used must be included Note Permanent damage to the transmitter could result if the voltage dr...

Страница 72: ...64 Reference Manual 00809 0200 4728 Rev SA Operation and Maintenance July 2018 Operation and Maintenance ...

Страница 73: ...ming an operation preceded by this symbol Failure to follow these installation guidelines could result in death or serious injury Make sure only qualified personnel perform the installation Explosions could resulting death or serious injury Do not remove the connection head cover in explosive atmospheres when the circuit is live Before connecting a Field Communicator in an explosive atmosphere mak...

Страница 74: ... 4 20 mA reference scale Scaled Output Trim calibrates the transmitter to a user selectable reference scale 5 3 1 Trimming The trim functions should not be confused with the rerange functions Although the rerange command matches a sensor input to a 4 20 mA output as in conventional calibration it does not affect the transmitter s interpretation of the input One or more of the trim functions may be...

Страница 75: ...t the calibration device or sensor to the transmitter If using an active calibrator see Active calibrator and EMF compensation on page 69 2 Connect the communicator to the transmitter loop From the HOME screen enter the Fast Key sequence The communicator will ask Are you using an active calibrator a Select No if a sensor is connected to the transmitter b Select Yes if using a calibration device By...

Страница 76: ...eful for recovering from an inadvertent trim incorrect Plant Standard or faulty meter Field Communicator From the HOME screen enter the Fast Key sequence and follow the steps within the Field Communicator to complete the Sensor Trim AMS Device Manager 1 Right click on the device and select Service Tools 2 On the Sensor Calibration tab select the Restore Factory Calibration 3 Follow the screen prom...

Страница 77: ...er to perform EMF compensation and as a result a difference in readings between the Active Calibrator and actual sensor may exist If a reading difference is experienced and is greater than the plant s accuracy specification allows perform a sensor trim with Active Calibrator Mode disabled In this case an active calibrator capable of tolerating pulsating sensor current must be used or the actual se...

Страница 78: ...evice Manager 1 Right click on the device and select Service Tools 2 In the left navigation pane select Maintenance 3 Find the Analog Calibration tab and click on the Analog Trim button 4 Follow the screen prompts through the Analog Trimming process LOI Reference Figure 5 5 for guidance on where to find analog trim in the LOI menu Figure 5 5 Trimming the Analog Output with the LOI Device Dashboard...

Страница 79: ...Maintenance 3 Find the Analog Calibration tab and select the Scaled Trim button 4 Follow the screen prompts through the Analog Trimming process 5 6 Transmitter sensor matching Use Transmitter Sensor Matching to enhance the temperature measurement accuracy of the system and if you have a sensor with Callendar Van Dusen constants When ordered from Emerson sensors with Callendar Van Dusen constants a...

Страница 80: ... Standard RTD vs RTD with Matched CVD Constants with Standard Transmitter Accuracy System accuracy comparison at 150 C using a PT 100 α 0 00385 RTD with a span of 0 to 200 C Standard RTD Matched RTD Rosemount 644 0 15 C Rosemount 644 0 15 C Standard RTD 1 05 C Matched RTD 0 18 C Total System 1 1 Calculated using root summed squared RSS statistical method 1 06 C Total System 1 0 23 C System Accurac...

Страница 81: ...g procedures list how to change HART revisions between HART Revision 7 and HART Revision 5 5 7 1 Generic menu If the HART configuration tool is not capable of communicating with a HART Revision 7 device it should load a Generic Menu with limited capability The following procedures allow for switching between HART Revision 7 and HART Revision 5 from a generic menu in any HART compliant configuratio...

Страница 82: ...o find HART Rev in the LOI menu Figure 5 7 Switching the HART Revision with the LOI CALIBRAT DAMPING VARIABLE MAP TAG ALM SAT VALUES PASSWORD SIMULATE HART REV HART REV BACK TO MENU EXIT MENU HART REV 7 HART REV 5 BACK TO MENU MAIN MENU VIEW CONFIG ZERO TRIM UNITS RERANGE LOOP TEST DISPLAY EXTENDED MENU EXTENDED MENU EXIT MENU ...

Страница 83: ... operations Information that raises potential safety issues is indicated by a warning symbol Refer to the following safety messages before performing an operation preceded by this symbol Explosions could result in death or serious injury Installation of this transmitter in an explosive environment must be in accordance with the appropriate local national and international standards codes and pract...

Страница 84: ...d multiple grounds High output Sensor input failure or connection Connect a Field Communicator and enter the transmitter test mode to check for a sensor failure Check for a sensor open or short circuit Check the process variable to see if it is out of range Loop wiring Check for dirty or defective terminals interconnecting pins or receptacles Power supply Check the output voltage of the power supp...

Страница 85: ...Field Communicator and check the sensor limits to ensure calibration adjustments are within the sensor range Table 6 2 Failed Fix Now Alert name LCD screen LOI screen Problem Recommended action Electronics failure ALARM DEVICE ALARM FAIL ALARM DEVICE ALARM FAIL If diagnostics indicate and electronics failure essential electronics in the device have failed For example the transmitter may have exper...

Страница 86: ...configuration of the device 2 Reset the device 3 If error persists download the transmitter configuration 4 If error still present replace the transmitter Field device malfunction ALARM DEVICE ALARM FAIL ALARM DEVICE ALARM FAIL The device has malfunctioned or needs immediate attention 1 Perform a processor reset 2 View other alerts to see if the transmitter indicates a specific problem 3 If the co...

Страница 87: ...ied calibration temperature Sensor out of operating limits 1 SAT SNSR 1 XX XXX C SAT SNSR 1 XX XXX C Sensor readings are outside the sensor s specified range 1 Verify the process temperature is within the specified sensor s range Use the Sensor Information button to compare with the process temperature 2 Verify the sensor is properly wired and connected to the terminals 3 Verify the integrity of t...

Страница 88: ...ople exposed to specific hazardous substances must be included with the returned materials Alert name LCD screen LOI screen Problem Recommended action LCD is not displaying correctly or at all Rosemount 644 HART 7 Rosemount 644 HART 7 The display may not be functioning or it may be stuck on Home screen If the meter does not appear to function make sure the transmitter is configured for the meter o...

Страница 89: ...ed Safety Transmitter is certified to Low demand Type B SIL 2 for random integrity at HFT 0 SIL 3 for random integrity at HFT 1 SIL 3 for systematic integrity 7 2 Safety certified identification All Rosemount 644 HART Head Mount and Field Mount Transmitters must be identified as safety certified before installing into a SIS To identify a safety certified Rosemount 644 Transmitter make sure the dev...

Страница 90: ...t 644 prior to operating in Safety Mode All configuration methods outlined in Section 2 are the same for the safety certified Rosemount 644 Transmitter with any differences noted Software lock must be used in order to prevent unwanted changes to the transmitter configuration Note Transmitter output is not safety rated during the following Configuration changes Multidrop operation Simulation Active...

Страница 91: ...end a HART command to the transmitter to go to high alarm current output and verify that the analog current reaches that value This tests for compliance voltage problems such as low loop power supply voltage or increased wiring resistance This also tests for other possible failures 3 Send a HART command to the transmitter to go to the low alarm current output and verify that the analog current rea...

Страница 92: ...3 Verify the measurement for two temperature points for Sensor 1 Verify the measurement for two temperature points for Sensor 2 if second sensor is present 4 Perform reasonability check of the housing temperature 5 Restore the loop to full operation 6 Remove the bypass from the safety PLC or otherwise restore to normal operation 7 5 4 Comprehensive proof test 3 The comprehensive proof test 3 inclu...

Страница 93: ...t Us 7 6 Specifications The Rosemount 644 Transmitter must be operated in accordance to the functional and performance specifications provided in the Rosemount 644 Product Data Sheet 7 6 1 Failure rate data The report is available at the Rosemount 644 Temperature Transmitter product page 7 6 2 Failure values Safety Deviation defines what is dangerous in a FMEDA Span 100 C 2 of process variable spa...

Страница 94: ...86 Reference Manual 00809 0200 4728 Rev SA Safety Instrumented Systems SIS Certification July 2018 Safety Instrumented Systems SIS Certification ...

Страница 95: ...ar and click Documents Drawings 3 Click Manuals Guides 4 Select the appropriate Quick Start Guide A 2 Ordering Information Specifications and Drawings To view current Rosemount 644 Temperature Transmitter Ordering Information Specifications and Drawings follow these steps 1 Go to Emerson com Rosemount Rosemount 644 2 Scroll as needed to the green menu bar and click Documents Drawings 3 For install...

Страница 96: ...Reference Data July 2018 Reference Manual 00809 0200 4728 Rev SA Specifications and Reference Data 88 ...

Страница 97: ... and Security 1 Alarm Direction 2 High Saturation 3 Low Saturation 4 High Alarm 5 Low Alarm 6 Software Write Protect 7 Lock Status 8 Password Protection Identification 1 Tag 2 Long Tag 3 Model 4 Electronics S N 5 Final Assembly Num 6 Date 7 Description 8 Message 9 Device Image Failed 1 Invalid Configuration 2 Electronics Failure 3 Calibration Error 4 Sensor Drift Alert Active 5 Sensor 1 Open 6 Sen...

Страница 98: ... Alarm Sat Levels 1 Alarm Direction 2 High Alarm 3 High Saturation 4 Low Saturation 5 Low Alarm 6 Config Alarm Sat Levels Guided Setup 1 Configure Sensors 2 Calibrate Sensors 3 Configure Device 4 Configure Display 5 Config Hot Backup 6 Config Drift Alert 7 Diagnostics Suite Manual Setup 1 Sensor 1 2 Sensor 2 3 Calculated Output 4 Diagnostics 5 Analog Output 6 Display 7 Device 8 HART 9 Security Sen...

Страница 99: ...Cal 6 Sensor 2 Upper Cal 7 Active Calibrator Active Alerts 1 Good only if No Alerts 2 Failed 3 Advisory 4 Maintenance Fix Soon Service Tools 1 Alerts 2 Variables 3 Trends 4 Maintenance 5 Simulate Variables 1 Variable Summary 2 Primary Variable 3 Second Variable 4 Third Variable 5 Fourth Variable 6 Analog Output Min Max Tracking 1 Min Max Mode 2 Reset All Min Max Values 3 Parameter 1 4 Parameter 2 ...

Страница 100: ... Alarm Direction 2 High Saturation 3 Low Saturation 4 High Alarm 5 Low Alarm 6 Software Write Protect 7 Lock Status 8 Password Protection Identification 1 Tag 2 Long Tag 3 Model 4 Electronics S N 5 Final Assembly Num 6 Date 7 Description 8 Message 9 Device Image Failed 1 Invalid Configuration 2 Electronics Failure 3 Calibration Error 4 Sensor Drift Alert Active 5 Sensor 1 Open 6 Sensor 2 Open 7 Se...

Страница 101: ...ode Config 6 Variable Mapping Alarm Sat Levels 1 Alarm Direction 2 High Alarm 3 High Saturation 4 Low Saturation 5 Low Alarm 6 Config Alarm Sat Levels Guided Setup 1 Configure Sensors 2 Calibrate Sensors 3 Configure Device 4 Configure Display 5 Config Hot Backup 6 Config Drift Alert 7 Diagnostics Suite Manual Setup 1 Sensor 1 2 Sensor 2 3 Calculated Output 4 Diagnostics 5 Analog Output 6 Display 7...

Страница 102: ...Cal 6 Sensor 2 Upper Cal 7 Active Calibrator Active Alerts 1 Good only if No Alerts 2 Failed 3 Advisory 4 Maintenance Fix Soon Service Tools 1 Alerts 2 Variables 3 Trends 4 Maintenance 5 Simulate Variables 1 Variable Summary 2 Primary Variable 3 Second Variable 4 Third Variable 5 Fourth Variable 6 Analog Output Min Max Tracking 1 Min Max Mode 2 Reset All Min Max Values 3 Parameter 1 4 Parameter 2 ...

Страница 103: ...5 Device Information 1 8 1 1 8 1 Differential Temperature Setup 2 2 3 1 2 2 3 1 Drift Alert 2 2 4 2 2 2 4 2 Filter 50 60 Hz 2 2 7 4 1 2 2 7 4 1 First Good Temperature Setup 2 2 3 2 2 2 3 2 Hardware Revision 1 8 2 3 1 8 2 3 HART Lock N A 2 2 9 2 Intermittent Sensor Detect 2 2 7 4 2 2 2 7 4 2 Loop Test 3 5 1 3 5 1 Locate Device N A 3 4 6 2 Lock Status N A 1 8 3 8 LRV Lower Range Value 2 2 5 5 3 2 2 ...

Страница 104: ...amping 1 3 3 1 3 Configuration 1 3 PV Unit 1 3 3 1 4 D A Trim 1 2 2 2 Range Values 1 3 3 1 Damping Values 1 1 10 Review 1 4 Date 1 3 4 2 Scaled D A Trim 1 2 2 3 Descriptor 1 3 4 3 Sensor Connection 1 3 2 1 1 Device Info 1 3 4 Sensor 1 Setup 1 3 2 1 2 Device Output Configuration 1 3 3 Sensor Serial Number 1 3 2 1 4 Diagnostics and Service 1 2 Sensor 1 Trim 1 2 2 1 Filter 50 60 Hz 1 3 5 1 Sensor 1 T...

Страница 105: ...on until the 0 is blinking on the screen in the selected position 00000022 3 Press the enter button to select the 0 as an entry The second digit from the left will be blinking 00000022 4 Press the enter button to select 0 for second digit The third digit from the left will be blinking 00000022 5 Press the enter button to select 0 for the third digit The fourth digit from the left will now be blink...

Страница 106: ...a faster scrolling technique is available Scrolling functionality allows the user to walk through any menu in forward or reverse order enter text or digits easily and quickly Menu scrolling Simply hold down the left button after it brings you to the next menu item each of the proceeding menus will be shown one after another while the button is pressed down For an example see Figure C 1 Text or dig...

Страница 107: ...lar menu navigation it is possible to go back to the previous screen by pressing both buttons at the same time Figure C 2 Scrolling Backwards Menu scrolling Text and digit scrolling V I E W C O N F I G C O N F I G L S E N S O R L U N I T S B A C K T O M E N U E X I T M E N U L A B c T A G T A G T A G L L B A C K T O M E N U E X I T M E N U L z M e n u L L R E R A N G E D I S P L A Y L L L O O P T ...

Страница 108: ...SAVE to ask the user if they want to save the information just entered You can select the cancel function choose NO or the save function choose YES After the save function is selected SAVED shall appear on the screen Saving a setting Saving text or values Canceling When a value or text string is being entered into the transmitter via the LOI and the function is canceled the LOI menu can offer the ...

Страница 109: ... EXIT MENU UNITS CHNG ALL SENSOR 1 UNITS SENSOR 2 UNITS DIFFRNTL UNITS AVERAGE UNITS 1ST GOOD UNITS BACK TO MENU EXIT MENU DISPLAY SENSOR 1 on off SENSOR 2 on off ANALOG on off PV on off AVG on off 1ST GD on off DIFF on off RANGE on off MINMAX 1 on off MINMAX 2 on off MINMAX 3 on off MINMAX 4 on off BACK TO MENU EXIT MENU EXTENDED MENU CALIBRAT DAMPING VARIABLE MAP TAG ALM SAT VALUES PASSWORD SIMU...

Страница 110: ...IT MENU SIMULATE SIMULATE SNSR 1 SIMULATE SNSR 2 END SIMUL BACK TO MENU EXIT MENU EXTENDED MENU CALIBRAT DAMPING VARIABLE MAP TAG ALRM SAT VALUES PASSWORD SIMULATE HART REV HOT BU CONFIG DRIFT ALERT TC DIAG CONFIG MIN MAX TRACK BACK TO MENU EXIT MENU ALARM SAT VALUES ROSEMNT VALUES NAMUR VALUES OTHER VALUES BACK TO MENU EXIT MENU HART REV HART REV 7 HART REV 5 BACK TO MENU EXIT MENU CONFIG SNSR 1 ...

Страница 111: ......

Страница 112: ...768 6111 41 0 41 768 6300 RFQ RMD RCC Emerson com Asia Pacific Regional Office Emerson Automation Solutions 1 Pandan Crescent Singapore 128461 65 6777 8211 65 6777 0947 Enquiries AP Emerson com Middle East and Africa Regional Office Emerson Automation Solutions Emerson FZE P O Box 17033 Jebel Ali Free Zone South 2 Dubai United Arab Emirates 971 4 8118100 971 4 8865465 RFQ RMTMEA Emerson com Linked...

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