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Reference Manual

00809-0100-4825, Rev BB

August 2005

Rosemount 248

3-12

Intermittent Sensor Detect (Advanced Feature)

The Intermittent Sensor Detect feature is designed to guard against process
temperature readings caused by intermittent open sensor conditions (an

intermittent

sensor condition is an open sensor condition that lasts less than

one update). By default, the transmitter is shipped with the Intermittent Sensor
Detect 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% of the
sensor limits with a HART communicator.

Transmitter Behavior with Intermittent Sensor Detect ON

When the Intermittent Sensor Detect feature is switched

ON

, the transmitter

can eliminate the output pulse caused by intermittent open sensor conditions.
Process temperature changes (

Δ

T) within the threshold value will be tracked

normally by the transmitter’s output. A

Δ

T greater than the threshold value will

activate the intermittent sensor algorithm. True open sensor conditions will
cause the transmitter to go into alarm.

The threshold value of the Rosemount 248 should be set at a level that allows
the normal range of process temperature fluctuations; too high and the
algorithm will not be able to filter out intermittent conditions; too low and the
algorithm will be activated unnecessarily. The default threshold value is 0.2%
of the sensor limits.

Transmitter Behavior with Intermittent Sensor Detect OFF

When the Intermittent Sensor Detect feature is switched

OFF

, the transmitter

tracks all process temperature changes, even if they are the consequence of
an intermittent sensor. (The transmitter in effect behaves as though the
threshold value had been set at 100%.) The output delay due to the
intermittent sensor algorithm will be eliminated.

Intermittent Threshold

The threshold value can be changed from the default value of 0.2%. Turning
the Intermittent Sensor Detect feature

OFF

or leaving it

ON

and increasing

the threshold value above the default does not affect the time needed for the
transmitter to output the correct alarm signal after detecting a true open
sensor condition. However, the transmitter may briefly output a false
temperature reading for up to one update in either direction (see Figure 3-3 on
page 3-14) up to the threshold value (100% of sensor limits if Intermittent
Sensor Detect is

OFF)

. Unless rapid response rate is necessary, the

suggested setting of the Intermittent Sensor Detect mechanism is

ON

with

0.2% threshold

.

Fast Key Sequence

1, 3, 5, 4

«
...
34
35
36
37
38
...
»

Содержание 248

Страница 1: ...www rosemount com Reference Manual 00809 0100 4825 Rev BB August 2005 Rosemount 248 Transmitter and Temperature Monitoring Assembly ...

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Страница 3: ...m product performance make sure to thoroughly understand the contents before installing using or maintaining this product The United States has two toll free assistance numbers and one international number Customer Central 1 800 999 9307 7 00 a m to 7 00 P M CST National Response Center 1 800 654 7768 24 hours a day Equipment service needs International 1 952 906 8888 The products described in thi...

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Страница 5: ...uropean and Asia Pacific Installation 2 4 Typical North and South American Installation 2 5 Multichannel Installations 2 8 Set the Switches 2 8 Failure Mode 2 8 Wiring 2 8 Sensor Connections 2 9 Power Supply 2 11 Surges Transients 2 12 Ground the Transmitter 2 12 SECTION 3 Configuration Safety Messages 3 1 Warnings 3 1 Commissioning 3 2 Setting the Loop to Manual 3 2 AMS 3 2 Apply AMS Changes 3 2 ...

Страница 6: ...mitter Specifications A 1 Functional Specifications A 1 Physical Specifications A 3 Performance Specifications A 3 Sensor Specifications A 6 Thermocouples IEC 584 A 6 Thermocouples ASTM E 230 A 6 RTDs A 7 Thermowells A 7 Dimensional Drawings A 8 Ordering Information A 10 APPENDIX B Product Certifications Hazardous Locations Certifications B 1 North American Approvals B 1 European Approvals 1 B 2 A...

Страница 7: ...el perform the installation Explosions could result in death or serious injury Do not remove the connection head cover in explosive atmospheres when the circuit is live Before connecting a 375 Field Communicator in an explosive atmosphere make sure the instruments in the loop are installed in accordance with intrinsically safe or non intrinsic field wiring practices Verify that the operating atmos...

Страница 8: ...ion B Product Certifications Product Certifications Hazardous Locations Certifications Installation Drawings Transmitter Features of the Rosemount 248 include Accepts inputs from a wide variety of RTD and thermocouple sensors Configuration using HART protocol Electronics that are completely encapsulated in epoxy and enclosed in a plastic housing making the transmitter extremely durable and ensurin...

Страница 9: ...semount 248 head mount transmitter to a DIN rail Electrical Proper electrical installation is necessary to prevent errors due to sensor lead resistance and electrical noise For best results shielded cable should be used in electrically noisy environments A resistance between 250 and 1100 ohms must be present in the loop for communication with a 375 Field Communicator Make wiring connections throug...

Страница 10: ...esponse Center toll free at 800 654 7768 This center available 24 hours a day will assist you with any needed information or materials The center will ask for the following information Product model Serial numbers The last process material to which the product was exposed The center will provide A Return Material Authorization RMA number Instructions and procedures that are necessary to return goo...

Страница 11: ...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 circuit is live Before connecting a communicator in an explosive atmosphere make sure the instruments in the loop are installed in accordance with instrinsically safe or non incendive field wiring practices Verify that the op...

Страница 12: ...rt START HERE Bench Calibration BASIC SETUP Set Sensor Type Set Number of Wires Set Units Set Range Values Set Damping VERIFY Simulate Sensor Input Within Specifications Refer to Section 4 Operation and Maintenance FIELD INSTALL Mount Transmitter Wire Transmitter Power Transmitter FINISHED 244 244_03A ...

Страница 13: ...s In a connection head or universal head mounted directly on a sensor assembly Apart from a sensor assembly using a universal head To a DIN rail using an optional mounting clip Mounting a Rosemount 248H to a DIN Rail To attach a head mount transmitter to a DIN rail assemble the appropriate rail mounting kit part number 00248 1601 0001 to the transmitter as shown in Figure 2 2 Figure 2 2 Assembling...

Страница 14: ...the sensor to the transmitter see Sensor Wiring Diagrams on page 2 10 4 Insert the transmitter sensor assembly into the connection head Thread the transmitter mounting screw into the connection head mounting holes Assemble the extension to the connection head Insert the assembly into the thermowell 5 Slip the shielded cable though the cable gland 6 Attach a cable gland into the shielded cable 7 In...

Страница 15: ... the universal head and transmitter Mount the transmitter in the universal head by threading the transmitter mounting screws into the universal head mounting holes 5 Mount the transmitter sensor assembly into the thermowell Seal adapter threads with silicone tape 6 Install conduit for field wiring to the conduit entry of the universal head Seal conduit threads with silicone tape 7 Pull the field w...

Страница 16: ...ll Install and tighten the thermowell before applying pressure 3 Attach the sensor to the connection head and mount the entire assembly to the thermowell 4 Attach sufficient lengths of sensor lead wire to the sensor terminal block 5 Attach and tighten the connection head cover Enclosure covers must be fully engaged to meet explosion proof requirements 6 Run sensor lead wires from the sensor assemb...

Страница 17: ...Attach necessary extension nipples and adapters Seal the nipple and adapter threads with silicone tape 4 Screw the sensor into the thermowell Install drain seals if required for severe environments or to satisfy code requirements 5 Screw the connection head to the sensor 6 Attach the sensor lead wires to the connection head terminals 7 Attach additional sensor lead wires from the connection head t...

Страница 18: ... 20 5 mA for standard or NAMUR compliant configuration on the high end if the sensor temperature is outside of range limits These values are also custom configurable by the factory or using the 375 Field Communicator or AMS See Alarm and Saturation on page 3 11 for instructions on how to change the alarm and saturation levels with the 375 Field Communicator NOTE Microprocessor failures cause high ...

Страница 19: ... lead to the terminal see Figure 2 6 Use extreme caution when making contact with the leads and terminals 3 Tighten the terminal screws 4 Reattach and tighten the cover if applicable All connection head covers must be fully engaged to meet explosion proof requirements 5 Apply power see Power Supply Figure 2 6 Rosemount 248 Wiring Sensor Connections The Rosemount 248 is compatible with a number of ...

Страница 20: ... RTD the effect of lead resistance is eliminated and has no impact on accuracy However a 3 wire sensor will not fully cancel lead resistance error because it cannot compensate for imbalances in resistance between the lead wires Using the same type of wire on all three lead wires will make a 3 wire RTD installation as accurate as possible A 2 wire sensor will produce the largest error because it di...

Страница 21: ...nce load is the sum of the resistance of the signal leads and the load resistance of any controller indicator or related pieces of equipment in the loop Note that the resistance of intrinsic safety barriers if used must be included Total cable length 150 m Imbalance of the lead wires at 20 C 0 5 Ω Resistance length 18 AWG Cu 0 025 Ω m C Temperature coefficient of Cu αCu 0 039 Ω Ω C Temperature coe...

Страница 22: ...r grounded However the extra noise in floating systems affects many types of readout devices If the signal appears noisy or erratic grounding the current signal loop at a single point may solve the problem The best place to ground the loop is at the negative terminal of the power supply Do not ground the current signal loop at more than one point The transmitter is electrically isolated to 500 V a...

Страница 23: ...mitter housing 3 Ground shield at the power supply end only 4 Ensure that the sensor shield is electrically isolated from the surrounding grounded fixtures Option 3 1 Ground sensor wiring shield at the sensor if possible 2 Ensure that 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 shi...

Страница 24: ...r wiring shield at the sensor 2 Ensure that 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 4 20 mA loop Sensor Wires Shield ground point Transmitter ...

Страница 25: ... in death or serious injury Do not remove the connection head cover in explosive atmospheres when the circuit is live Before connecting a communicator in an explosive atmosphere make sure the instruments in the loop are installed in accordance with instrinsically safe or non incendive field wiring practices When sending or requesting data that would disrupt the loop or change the output of the tra...

Страница 26: ...municator or AMS leads at any termination point in the signal loop Connect the communication leads to the COMM terminals located on the terminal block Do not connect to the TEST terminals Set the transmitter jumpers to avoid transmitter damage caused by the plant environment Setting the Loop to Manual When sending or requesting data that would disrupt the loop or change the output of the transmitt...

Страница 27: ...on stored in the Rosemount 248 This includes device information measuring element output configuration and software 1 TEST DEVICE 2 CALIBRATION 3 Write Protect On line Menu 1 Snsr 1 Digital Reading 2 Terminal Digital Reading 1 Snsr 1 Input Trim 2 Snsr 1 Trim Fact 3 Active Calibrator 1 Loop Test 2 Self test 3 Master Reset 4 Status 1 SNSR 1 TRIM 2 D A trim 3 Scaled D A trim 1 Revision s 2 Sensor Rev...

Страница 28: ...ensor Connection 1 3 2 1 1 Date 1 3 4 2 Sensor 1 Setup 1 3 2 1 2 Descriptor 1 3 4 3 Sensor Serial Number 1 3 2 1 3 Device Info 1 3 4 Sensor 1 Trim 1 2 2 1 Device Output Configuration 1 3 3 Sensor 1 Trim Factory 1 2 2 1 2 Diagnostics and Service 1 2 Sensor Type 1 3 2 1 1 Filter 50 60 Hz 1 3 5 1 Software Revision 1 4 1 Hardware Rev 1 4 1 Status 1 2 1 4 Hart Output 1 3 3 3 Tag 1 3 4 1 Intermittent De...

Страница 29: ...In many cases all of these variables are pre configured at the factory Configuration may be required if the transmitter is not configured or if the configuration variables need revision Variable Mapping The Variable Mapping menu displays the sequence of the process variables When using the Rosemount 248 you can select 5 Variable Re Map to change this configuration When the Select PV screen appears...

Страница 30: ... to any value between 0 and 32 seconds The value chosen for damping affects the response time of the transmitter When set to zero or disabled the damping function is off and the transmitter output reacts to changes in input as quickly as the intermittent sensor algorithm allows refer to Intermittent Threshold on page 3 12 for a description of the intermittent sensor algorithm Increasing the dampin...

Страница 31: ...ter adjusting its temperature measurement to correct the error caused by this resistance Due to a lack of lead wire compensation within the RTD temperature measurements made with a 2 wire RTD are often inaccurate See Sensor Lead Wire Resistance Effect RTD Input on page 2 10 for more information To utilize this feature perform the following steps 1 Measure the lead wire resistance of both RTD leads...

Страница 32: ...er defined variable that provides a place to save the date of the last revision of configuration information It has no impact on the operation of the transmitter or the 375 Field Communicator Descriptor The Descriptor variable provides a longer user defined electronic label to assist with more specific transmitter identification than is available with the tag variable The descriptor may be up to 1...

Страница 33: ...nd the operations of any recorders or similar devices installed in the loop To initiate a loop test perform the following procedure 1 Connect a reference meter to the transmitter To do so shunt the transmitter power through the meter at some point in the loop 2 From the HOME screen select 1 Device Setup 2 Diag Serv 1 Test Device 1 Loop Test before performing a loop test 3 Select a discreet milliam...

Страница 34: ...ibrator Mode must be disabled before returning the transmitter to the process This will ensure that the full diagnostic capabilities of the Rosemount 248 are available Disabling or enabling the Active Calibrator Mode will not change any of the sensor trim values stored in the transmitter Sensor Review The Signal Condition command allows viewing or changing the primary variable lower and upper rang...

Страница 35: ...or Failure Mode considerations Rerange Reranging the transmitter sets the measurement range to the limits of expected readings Setting the measurement range to the limits of expected readings maximizes transmitter performance the transmitter is most accurate when operated within the expected temperature range for your application PV Range Values The PV URV and PV LRV commands found in the PV Range...

Страница 36: ...hould be set at a level that allows the normal range of process temperature fluctuations too high and the algorithm will not be able to filter out intermittent conditions too low and the algorithm will be activated unnecessarily The default threshold value is 0 2 of the sensor limits Transmitter Behavior with Intermittent Sensor Detect OFF When the Intermittent Sensor Detect feature is switched OF...

Страница 37: ...not go into alarm For users of the Rosemount 248 that desire a more immediate open sensor detection the Open Sensor Holdoff option can be changed to a fast setting With this setting the transmitter will report an open sensor condition without additional verification of the open condition Fast Key Sequence 1 3 5 3 0 0 5 10 15 20 25 0 2 0 4 0 6 0 8 1 0 1 2 1 4 1 6 Transmitter Output mA Time seconds ...

Страница 38: ...essary from each transmitter the combination of transmitter models and the length of the transmission line Each transmitter is identified by a unique address 1 15 and responds to the commands defined in the HART protocol Figure 3 3 Typical Multidropped Network Figure 3 3 shows a typical multidrop network Do not use this figure as an installation diagram Contact Emerson Process Management product s...

Страница 39: ...rious injury Do not remove the connection head cover in explosive atmospheres when the circuit is live Before connecting a 375 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 When sending or requesting data that would disrupt the loop or change the output of the transmitt...

Страница 40: ...brates the transmitter to a 4 20 mA reference scale Scaled Output Trim calibrates the transmitter to a user selectable reference scale Trim the Transmitter One or more of the trim functions may be used when calibrating The trim functions are as follows Sensor Input Trim Output Trim Output Scaled Trim Sensor Input Trim Perform a sensor trim if the transmitters digital value for the primary variable...

Страница 41: ...e Use a bath furnace or isothermal block measured with a site standard thermometer as the known temperature source 8 Select OK once the temperature stabilizes The communicator displays the output value the transmitter associates with the input value provided by the calibration device 9 Enter the lower or upper trim point depending on the selection in Step 6 Output Trim or Scaled Output Trim Perfor...

Страница 42: ...ference meter value equals the transmitter output value then select 1 Yes and go to step 6 If the reference meter value does not equal the transmitter output value then select 2 No and go to step 4 6 Select OK at the SETTING FLD DEV OUTPUT TO 20 MA prompt and repeat steps 4 and 5 until the reference meter value equals the transmitter output value 7 Return the control loop to automatic control and ...

Страница 43: ...ecting pins or receptacles Power Supply Check the output voltage of the power supply at the transmitter terminals It should be 12 0 to 42 4 V dc over entire 3 75 to 23 mA operating range Electronics Module Connect a 375 Field Communicator and enter the transmitter status mode to isolate module failure Connect a 375 Field Communicator and check the sensor limits to ensure calibration adjustments ar...

Страница 44: ...at Ignore next 50 occurrences of status Asked after displaying device status Softkey answer determines whether next 50 occurrences of device status will be ignored or displayed Illegal character An invalid character for the variable type was entered Illegal date The day portion of the date is invalid Illegal month The month portion of the date is invalid Illegal year The year portion of the date i...

Страница 45: ...ent data Too few data bytes received Command returns fewer data bytes than expected as determined by the device description Transmitter Fault Device returns a command response indicating a fault with the connected device Units for variable label has changed Unit must be sent before editing or invalid data will be sent The engineering units for this variable have been edited Send engineering units ...

Страница 46: ...Reference Manual 00809 0100 4825 Rev BB August 2005 Rosemount 248 4 8 ...

Страница 47: ... V dc at 50 60 Hz Power Supply An external power supply is required The transmitter operates on 12 0 to 42 4 V dc transmitter terminal voltage with load resistance between 250 and 1100 ohms A minimum of 17 75 V dc power supply is required with a load of 250 ohms Transmitter power terminals are rated to 42 4 V dc A HART Communicator requires a loop resistance between 250 and 1100 ohms Do not commun...

Страница 48: ...tom Alarm and Saturation Levels Custom factory configuration of alarm and saturation levels is available with option code C1 for valid values These values can also be configured in the field using a HART Communicator Software Detected Failure Mode The values at which the transmitter drives its output in failure mode depends on whether it is configured to standard custom or NAMUR compliant NAMUR re...

Страница 49: ...il using an optional mounting clip see Table A 10 Weight Enclosure Ratings The Universal option code U and Rosemount Connection option code A Heads are NEMA 4X IP66 and IP68 The Universal Head with 1 2 in NPT threads is CSA Enclosure Type 4X The BUZ head option code B is IP54 Performance Specifications EMC ElectroMagnetic Compatibility NAMUR NE21 Standard The Rosemount 248 meets the requirements f...

Страница 50: ...ths Self Calibration The analog to digital measurement circuitry automatically self calibrates for each temperature update by comparing the dynamic measurement to extremely stable and accurate internal reference elements Sensor Connections Frequency Vibration 10 to 60 Hz 0 21 mm displacement 60 to 2000 Hz 3 g peak acceleration Rosemount 248 Sensor Connections Diagram Rosemount Inc provides 4 wire ...

Страница 51: ...0 011 F 0 004 Pt 100 3 α 0 003916 3 JIS 1604 1981 200 to 645 328 to 1193 0 2 C 0 36 F 0 1 0 006 C 0 011 F 0 004 Pt 200 2 200 to 850 328 to 1562 1 17 C 2 11 F 0 1 0 018 C 0 032 F 0 004 Pt 500 2 200 to 850 328 to 1562 0 47 C 0 85 F 0 1 0 018 C 0 032 F 0 004 Pt 1000 2 200 to 300 328 to 572 0 23 C 0 41 F 0 1 0 010 C 0 018 F 0 004 Ni 120 4 4 Edison Curve No 7 70 to 300 94 to 572 0 16 C 0 29 F 0 1 0 004...

Страница 52: ...t 1 2 in adapter style thermocouples are manufactured using ISA Type J or K wire with special limits of error accuracy The junction of these wires is fusion welded to form a pure joint to maintain the integrity of the circuit and to ensure the highest accuracy Lead Wires Thermocouple internal 16 AWG solid wire max 18 AWG solid wire min External lead wire 20 AWG wire PTFE insulation Color coded per...

Страница 53: ...00 megaohms minimum insulation resistance when measured at 500 V dc at room temperature Sheath Material 321 SST with mineral insulated cable construction Lead Wires PTFE insulated coated 22 gauge stranded copper wire Thermowells Materials Barstock Thermowells 316L SST 1 4404 Tubular Thermowells 1 4571 316 Ti Construction Thermowell bodies are either machined from solid barstock or manufactured usi...

Страница 54: ...T Head option code S Universal Head 1 option codes H and U 1 A U Bolt is shipped with each universal head unless a sensor is ordered assembled to the enclosure However since the head can be integrally mounted to the sensor it may not need to be used 123 5 4 86 95 25 3 75 25 9 1 02 48 77 1 92 44 1 7 33 1 3 12 9 0 51 24 5 0 97 104 4 09 100 3 93 78 3 07 Approval Label 84 3 331 118 4 65 95 35 72 2 84 ...

Страница 55: ...g Loaded Sensor 80 3 2 for Class 900 flanges and larger N Extension Length U Thermowell Immersion Length Dimensions are in millimeters inches SEE ORDERING TABLES FOR MORE ASSEMBLY OPTIONS 248C Configuration Interface Option 1 HART Interface Box N U 25 1 0 BUZ Connection Head N U 40 1 6 60 2 3 Connection Head U N 60 2 3 Universal Head SENSORS_0000B01E 0000C01C 0000A01I On Off See war ning s on ba c...

Страница 56: ... Safety and Class I Division 2 A B N G K6 CSA Intrinsic Safety Explosion Proof and Class I Division 2 A G I7 SAA Intrinsic Safety A B N G E7 SAA Flame Proof A G N7 SAA Type n A B G I2 CEPEL Intrinsic Safety A B N G I4 JIS Intrinsic Safety A B N G E4 JIS Flame Proof A G NA No Approvals A B N G S Code Enclosures A Rosemount Connection Head DIN IP68 Aluminum B BUZ Connection Head DIN IP54 Aluminum C ...

Страница 57: ... U160 160 mm 6 30 in U200 200 mm 7 87 in U225 225 mm 8 86 in U250 250 mm 9 84 in U300 300 mm 11 8 in U400 400 mm 15 7 in Special Options C1 Factory Custom Configuration of Alarm and Saturation Levels Date Descriptor and Message Field A1 Analog Output Levels Compliant with NAMUR Recommendations NE43 High Alarm CN Analog Output Levels Compliant with NAMUR Recommendations NE43 Low Alarm C4 5 Point Ca...

Страница 58: ...of A U G H N7 SAA Type n A B U G H I2 CEPEL Intrinsic Safety A B U N G H I4 JIS Intrinsic Safety A B U N G H E4 JIS Flame Proof A U G H NA No Approvals A B U N G H S Code Enclosures A Rosemount Connection Head DIN IP68 Aluminum B BUZ Connection Head DIN IP54 Aluminum C 2 Polypropylene Connection Head G Rosemount Connection Head DIN IP 68 Stainless Steel H Universal Connection Head DIN IP 68 Stainl...

Страница 59: ...er 00813 0301 2654 Immersion Length U075 75 mm 2 95 in U100 100 mm 3 94 in U150 150 mm 5 91 in U225 225 mm 8 86 in U250 250 mm 9 84 in U300 300 mm 11 8 in Special Options C1 Factory Custom Configuration of Alarm and Saturation Levels Date Descriptor and Message Field A1 Analog Output Levels Compliant with NAMUR Recommendations NE43 High Alarm CN Analog Output Levels Compliant with NAMUR Recommenda...

Страница 60: ...ion Proof and Class I Division 2 A U G H I7 SAA Intrinsic Safety A B U N G H E7 SAA Flame Proof A U G H N7 SAA Type n A B U G H I2 CEPEL Intrinsic Safety A B U N G H I4 JIS Intrinsic Safety A B U N G H E4 JIS Flame Proof A U G H NA No Approvals A B U N G H S Code Enclosures A Rosemount Connection Head DIN IP68 Aluminum B BUZ Connection Head DIN IP54 Aluminum C 5 Polypropylene Connection Head G Ros...

Страница 61: ... A1 Analog Output Levels Compliant with NAMUR Recommendations NE43 High Alarm CN Analog Output Levels Compliant with NAMUR Recommendations NE43 Low Alarm C4 5 Point Calibration Use option code Q4 to generate a calibration certificate Q4 Calibration Certificate 3 Point standard use option codes C4 with Q4 for a 5 Point Calibration Certificate F6 60 Hz line Voltage Filter Q8 Thermowell Material Cert...

Страница 62: ... Compliant with NAMUR Recommendations NE43 High Alarm CN Analog Output Levels Compliant with NAMUR Recommendations NE43 Low Alarm C4 5 Point Calibration Use option code Q4 to generate a calibration certificate Q4 Calibration Certificate 3 Point standard use option codes C4 with Q4 for a 5 Point Calibration Certificate F6 60 Hz Line Voltage Filter Typical Model Number 248R A I1 Q4 1 Consult Factory...

Страница 63: ...Code Requirements Specification C1 Factory Configuration Data CDS required Date day month year Descriptor 16 alphanumeric characters Message 32 alphanumeric character Analog Output Alarm and saturation levels A1 NAMUR Compliant High Alarm See Table A 1 on page A 2 CN NAMUR Compliant Low Alarm See Table A 1 on page A 2 Q4 Calibration Certificate Will include 3 Point calibration at 0 50 and 100 anal...

Страница 64: ...Reference Manual 00809 0100 4825 Rev BB August 2005 Rosemount 248 A 18 ...

Страница 65: ...to 75 C T6 Tamb 40 to 40 C E5 FM Explosion Proof Explosion Proof for Class I Division 1 Groups B C and D Dust Ignition Proof for Class II III Division 1 Groups E F G when installed in accordance with Rosemount drawing 00644 1049 Temperature Codes T5 Tamb 40 to 85 C Canadian Standards Association CSA Approvals I6 CSA Intrinsically Safe and Class I Division 2 Intrinsically Safe for Class I Division ...

Страница 66: ...Codes T5 60 Tamb 80 C T6 60 Tamb 60 C Special Conditions for Safe Use X The apparatus must be installed in an enclosure which affords it a degree of protection of at least IP20 Non metallic enclosures must have a surface resistance of less than 1 GOHM light alloy or zirconium enclosures must be protected from impact and friction when installed E1 CENELEC Flame Proof Approval Certificate Number KEM...

Страница 67: ...nsmitters Rosemount Drawing 00248 1055 Rev AD 2 Sheets Factory Mutual Intrinsic Safety and Non Incendive Installation Drawing Rosemount Drawing 00644 1049 Rev AD 1 Sheet Factory Mutual Explosion proof Installation Drawing Rosemount Drawing 00248 1056 Rev AB 1 Sheet CSA Explosion Proof and Non Incendive Installation Drawing Rosemount Drawing 00248 1057 Rev AD 1 Sheet IECEX Intrinsic Safety Installa...

Страница 68: ...25 Rev BB August 2005 Rosemount 248 B 4 Figure B 1 FM Intrinsic Safety and Non Incendive Installation Drawing 00248 1055 Rev AD Sheet 1 of 2 Electronic Master PRINTED COPIES ARE UNCONTROLLED Rosemount Proprietary 248 00248 1055A04A ...

Страница 69: ...25 Rev BB August 2005 B 5 Rosemount 248 Figure B 2 FM Intrinsic Safety and Non Incendive Installation Drawing 00248 1055 Rev AD Sheet 2 of 2 Electronic Master PRINTED COPIES ARE UNCONTROLLED Rosemount Proprietary 248 00248 1055B04A ...

Страница 70: ...Reference Manual 00809 0100 4825 Rev BB August 2005 Rosemount 248 B 6 Figure B 3 Factory Mutual FM Explosion Proof Installation Drawing 00644 1049 Rev AD 248 00644 1049A03A ...

Страница 71: ...100 4825 Rev BB August 2005 B 7 Rosemount 248 Figure B 4 CSA I Explosion Proof and Non Incendive Installation Drawing 00248 1056 Rev AB Electronic Master PRINTED COPIES ARE UNCONTROLLED Rosemount Proprietary 248 00248 1056A04A ...

Страница 72: ...Reference Manual 00809 0100 4825 Rev BB August 2005 Rosemount 248 B 8 Figure B 5 CSA Explosion Proof Installation Drawing 00644 1059 Rev AE 248 00644 1059A03A ...

Страница 73: ...al 00809 0100 4825 Rev BB August 2005 B 9 Rosemount 248 Figure B 6 IECEx Intrinsic Safety Installation Drawing 00248 1057 Rev AD Electronic Master PRINTED COPIES ARE UNCONTROLLED Rosemount Proprietary 248 00248 1057 ...

Страница 74: ...Reference Manual 00809 0100 4825 Rev BB August 2005 Rosemount 248 B 10 ...

Страница 75: ...rical 1 3 Environmental 1 3 Temperature Effects 1 3 General 1 3 Mechanical 1 3 Location 1 3 Special Mounting 1 3 D Diagnostic Messages 4 5 Hardware 4 5 Diagnostics 3 9 Dimensional Drawings A 8 Drawings Dimensional A 8 Installation B 3 Wiring 2 10 F Failure Mode Switch 2 8 G Ground the Transmitter 2 12 Grounded Thermocouple Inputs 2 14 Ungrounded mV Inputs 2 12 RTD Ohm Inputs 2 12 Thermocouple Inpu...

Страница 76: ...Wires A 6 Performance Ambient Temperature A 5 CE Mark A 4 EMC Standard A 3 Power Supply Effect A 4 Self Calibration A 4 Sensor Connections A 4 Stability A 4 Vibration Effect A 4 Physical Enclosure Ratings A 3 HART Connections A 3 Materials of Construction A 3 Mounting A 3 Weight A 3 RTD Accuracy A 7 Immersion Error A 7 Insulation Resistance A 7 Lead Wires A 7 Self Heating A 7 Sensor Type A 7 Sheat...

Страница 77: ...Reference Manual 00809 0100 4825 Rev BB August 2005 0 1 Rosemount 248 NOTES ...

Страница 78: ...Reference Manual 00809 0100 4825 Rev BB August 2005 Rosemount 248 0 2 NOTES ...

Страница 79: ...Reference Manual 00809 0100 4825 Rev BB August 2005 0 3 Rosemount 248 NOTES ...

Страница 80: ...ctric WAGO is a registered trademark of Kontakttechnik GmbH Germany All other marks are the property of their respective owners Reference Manual 00809 0100 4825 Rev BB August 2005 Rosemount Temperature GmbH Frankenstrasse 21 63791 Karlstein Germany T 49 6188 992 0 F 49 6188 992 112 Emerson Process Management Asia Pacific Private Limited 1 Pandan Crescent Singapore 128461 T 65 6777 8211 F 65 6777 0...

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