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Reference Manual 00809-0400-4480, Rev AA May 2024 Rosemount ™ 1408H Level Transmitter Non-Contacting Radar with HART Protocol ®...
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• 1-800-654-7768 (24 hours a day — includes Canada) • Outside of these areas, contact your local Emerson representative. WARNING Failure to follow safe installation and servicing guidelines could result in death or serious injury. Ensure the transmitter is installed by qualified personnel and in accordance with applicable code of practice.
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CAUTION Hot surfaces The transmitter and process seal may be hot at high process temperatures. Allow to cool before servicing.
Configuration parameters provides extended information about the configuration parameters. 1.2 Product certifications See the Rosemount 1408H Product Certifications document for detailed information on the existing approvals and certifications. 1.3 Open source licenses This device uses open source software. Further information can be found in the License Information document available at Emerson.com/Rosemount.
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Introduction Reference Manual May 2024 00809-0400-4480 Emerson.com/Rosemount...
B. Time (s) C. Transmitted signal D. Reflected signal 2.1.1 Volume flow measurement The Rosemount 1408H can calculate the volume flow rate in an open channel. 2.2 Process characteristics 2.2.1 Dielectric constant A key parameter for measurement performance is reflectivity. A high dielectric constant of the medium provides better reflection and enables a longer measuring range.
The Rosemount 1408H uses Frequency Modulated Continuous Wave (FMCW) technology and smart algorithms to maximize measurement accuracy and reliability, even in small tanks and challenging fast-filling vessels.
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00809-0400-4480 May 2024 Mixing tanks Ensure correct filling and storage levels in tanks with agitators. Batch filling Optimize the batch filling process. CIP process Reliable level measurement during and after cleaning, plus optimization of cleaning agent storage. Rosemount 1408H Level Transmitter...
D. DIN 3869 profile ring E. ISO 228/1-G1 thread F. Antenna (PTFE sealing) G. Hygienic adapter O-ring H. Hygienic process connection adapter Figure 2-3: O-ring and Profile Ring A. DIN 3869 profile ring B. Hygienic adapter O-ring Related information Dimensional drawings Emerson.com/Rosemount...
B. Rosemount 751 Field Signal Indicator C. Handheld communicator D. HART modem E. PC with AMS Device Configurator F. Host/DCS system The Rosemount 1408H is compliant with NAMUR NE 107 Field Diagnostics for standardized device diagnostic information. Rosemount 1408H Level Transmitter...
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Transmitter overview Reference Manual May 2024 00809-0400-4480 Emerson.com/Rosemount...
Install and tighten process connectors before applying pressure. Do not attempt to loosen or remove process connectors while the transmitter is in service. 3.2 Installation considerations Before installing the transmitter, follow recommendations for mounting position, sufficient free space, nozzle requirements, etc. Rosemount 1408H Level Transmitter...
Do not mount the transmitter on a manway cover. • Do not position the transmitter directly over a side manway door. • Multiple Rosemount 1408H transmitters can be used in the same tank without interfering with each other. Figure 3-1: Recommended Mounting Position 3.2.2 ...
Max. 3° 90° 3.2.4 Non-metallic tanks Nearby objects outside the tank may cause disturbing radar echoes. Wherever possible, the transmitter should be positioned so that objects close to the tank are kept outside the radar beam. Rosemount 1408H Level Transmitter...
6.6 ft. (2 m) 1.2 ft. (0.4 m) 13.1 ft. (4 m) 2.3 ft. (0.7 m) 19.7 ft. (6 m) 3.4 ft. (1.0 m) 26.2 ft. (8 m) 4.6 ft. (1.4 m) 32.8 ft. (10 m) 5.7 ft. (1.7 m) Emerson.com/Rosemount...
Table 3-4: Nozzle Height in 3-A and EHEDG Applications Standard Maximum nozzle height (H) Must not exceed 2 x Nozzle diameter (D) nor 5 in. (127 mm) EHEDG Must not exceed Nozzle diameter (D) − 0.95 in. (24 mm) Rosemount 1408H Level Transmitter...
Mounting preparations 3.3.1 Remove the protective cap The protective cap protects the PTFE sealing from impacts during transport and storage. Procedure Before installing, carefully remove the protective cap. Note Be careful not to scratch or otherwise damage the PTFE sealing. Emerson.com/Rosemount...
Be careful not to scratch any of the surfaces. 3.3.3 Tri Clamp, dairy coupling, and VARIVENT ® Install the adapter Procedure 1. Place the O-ring in the groove of the transmitter. Note Be careful not to scratch or otherwise damage the PTFE sealing. Rosemount 1408H Level Transmitter...
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3. (Only for DIN 11851) Slide the coupling nut up over the bottom of the transmitter. 4. Screw the adapter onto the transmitter until it is hand-tight. 5. Secure the transmitter and adapter using a vise. CAUTION Do not over-tighten the vise as it might damage the adapter. Emerson.com/Rosemount...
While welding, the weld-in adapter and mandrel can get extremely hot. To prevent burns, allow the components to cool before disassembling the weld-in adapter and mandrel assembly. Procedure 1. Hand-tighten the weld-in adapter. 2. Insert the bolt through mandrel opening. Rosemount 1408H Level Transmitter...
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Procedure 1. Weld the adapter. Note While welding, prevent the adapter from warping. a) Fix the adapter in several spots with a sufficient adhesive force. Apply the fixing points at equal distances opposite each other. Emerson.com/Rosemount...
Mount the Tri Clamp version Procedure 1. Place a suitable gasket on top of the tank flange. 2. Lower the transmitter into the nozzle. Note Be careful not to scratch or otherwise damage the PTFE sealing. Rosemount 1408H Level Transmitter...
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1. Place a suitable gasket on top of the tank flange. 2. Lower the transmitter into the nozzle. Note Be careful not to scratch or otherwise damage the PTFE sealing. 3. Tighten the lock nut to the recommended torque (see the manufacturer’s instruction manual). Emerson.com/Rosemount...
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1. Mount a suitable O-ring on the adapter. 2. Lower the transmitter into the nozzle. Note Be careful not to scratch or otherwise damage the PTFE sealing. 3. Tighten the clamp to the recommended torque (see the manufacturer’s instruction manual). Rosemount 1408H Level Transmitter...
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The paste must be approved for the application and compatible with the elastomers used. 2. Mount the transmitter on the tank. Torque 310 in-lb (35 N-m) 39 mm Note Be careful not to scratch or otherwise damage the PTFE sealing. Emerson.com/Rosemount...
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3. Tighten the transmitter to the recommended torque. Torque 310 in-lb (35 N-m) 39 mm Note Over tightening the transmitter can impair the seal. If the sealing areas are damaged, replace the O-ring or the entire process connector. Rosemount 1408H Level Transmitter...
1. Mount the bracket on the wall/ceiling or other flat surface. 2. Ensure the adjustable holder is directed toward the ground. 90° 3. Apply lubricating paste on the transmitter thread. Note The paste must be approved for the application and compatible with the elastomers used. Emerson.com/Rosemount...
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Reference Manual Mechanical installation 00809-0400-4480 May 2024 4. Secure the transmitter to the bracket. 46 mm Related information Bracket hole pattern Rosemount 1408H Level Transmitter...
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Mechanical installation Reference Manual May 2024 00809-0400-4480 Emerson.com/Rosemount...
Handle the transmitter carefully. Install and tighten process connectors before applying pressure. Do not attempt to loosen or remove process connectors while the transmitter is in service. 4.2 Prepare the electrical connections 4.2.1 Connector type M12 male (A-coded) Rosemount 1408H Level Transmitter...
250 Ω is required. Maximum loop ® resistance (R) is determined by the voltage level of the external power supply (U R = 44.4 × (U − 14) Figure 4-1: Load Limits R (Ω) U E (Vdc) 19.6 4.2.7 Wiring diagram Figure 4-2: Connection Emerson.com/Rosemount...
Do not force the connector into place. Check that it is aligned properly. 3. Once fully inserted, turn the screw ring until tight. See the manufacturer’s instruction manual for recommended torque. 4. Connect the power supply. Related information Ingress protection Rosemount 1408H Level Transmitter...
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Electrical installation Reference Manual May 2024 00809-0400-4480 Emerson.com/Rosemount...
Do not attempt to loosen or remove process connectors while the transmitter is in service. 5.2 Overview This chapter provides information about configuration and configuration tools. Appendix Configuration parameters provides extended information about the configuration parameters. Rosemount 1408H Level Transmitter...
Emerson.com/MySoftware. 5.5 AMS Device Configurator 5.5.1 Download AMS Device Configurator AMS Device Configurator is a software for configuration of Emerson field devices using FDI technology. Procedure Download the software at Emerson.com/AMSDeviceConfigurator. 5.5.2 Add the FDI Package to AMS Device Configurator Procedure 1.
3. Ensure the Multidrop check box is selected. 5.8 Write protect a transmitter The transmitter can be write protected to prevent unauthorized changes. Procedure 1. Select Overview → Device Information → Alarm and Security. 2. Under Security, select Change Write Protection and follow the on-screen instructions. Rosemount 1408H Level Transmitter...
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Configuration Reference Manual May 2024 00809-0400-4480 Emerson.com/Rosemount...
Process leaks could result in death or serious injury. Handle the transmitter carefully. Install and tighten process connectors before applying pressure. Do not attempt to loosen or remove process connectors while the transmitter is in service. Rosemount 1408H Level Transmitter...
2. If status is anything other than Good, select the button in the device status image to open a window with active alerts. Active alerts can also be obtained via Service Tools → Alerts. Related information Diagnostic messages per NAMUR NE 107 Emerson.com/Rosemount...
6.4 Replacing the O-ring The process wetted O-ring should be checked periodically. Replace with O-ring designed for Rosemount 1408H if there are any signs of damage. Procedure 1. Secure the transmitter and adapter using a vise. Rosemount 1408H Level Transmitter...
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2. Unscrew the adapter from the transmitter. 39 mm 3. Remove the O-ring using a suitable non-metallic tool. Note Be careful not to scratch any of the surfaces. 4. If needed, clean the sealing areas. Related information Install the adapter Emerson.com/Rosemount...
Process leaks could result in death or serious injury. Handle the transmitter carefully. Install and tighten process connectors before applying pressure. Do not attempt to loosen or remove process connectors while the transmitter is in service. Rosemount 1408H Level Transmitter...
The device measurement reading is invalid. Recommended actions 1. Restore default settings, restart device, and reconfigure the device. 2. If the condition persists, replace the device. Related information Restore to default settings Restart the device Configure transmitter using guided setup Emerson.com/Rosemount...
Recommended actions 1. Restart the device. 2. Restore default settings and reconfigure the device. 3. If the condition persists, replace the device. Related information Restart the device Restore to default settings Configure transmitter using guided setup Rosemount 1408H Level Transmitter...
Recommended actions 1. Check that the value pairs in the volume strapping table are entered in increasing order. 2. Check that the number of strapping points to use is correct. 3. If condition persists, restore default settings and reconfigure device. Emerson.com/Rosemount...
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Primary variable configuration error Cause The Primary Variable selection is not supported. Recommended actions Change Primary Variable to variable supported by device. Related information Primary variable Measurement correction configuration error Cause The factory measurement correction data is invalid. Rosemount 1408H Level Transmitter...
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2. Restore default settings and reconfigure device. 3. If the condition persists, replace the device. Related information Restart the device Restore to default settings Configure transmitter using guided setup Factory calibration error Cause The factory calibration in the device is missing. Emerson.com/Rosemount...
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2. If condition persists, restore default settings and reconfigure device. Related information Units Restore to default settings Configure transmitter using guided setup 7.2.9 Simulation/test active Category Function Check Cause The device is in simulation or test mode and is not reporting actual information. Rosemount 1408H Level Transmitter...
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Accuracy of volume/volume flow measurement may be degraded. Recommended actions 1. If volume strapping table is used, make sure level values within operating range are included. 2. If volume flow linearization table is used, make sure input variable values within operating range are included. Emerson.com/Rosemount...
Verify the tank geometry parameters are configured correctly (especially the Reference Height). • Analyze the Echo Peaks and check General Threshold. • Restore default settings and reconfigure the device. Related information Reference height Analyze the echo peaks Adjust the general threshold Restore to default settings Rosemount 1408H Level Transmitter...
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Echo Peaks. 15° • Put an inclined metal plate on top of the disturbing object. • Move the transmitter to another position. Related information Analyze the echo peaks Adjust the general threshold Mounting position Emerson.com/Rosemount...
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Move the transmitter to another position. Possible cause Product build-up on the antenna. Recommended actions • Clean the antenna. Related information Analyze the echo peaks Adjust the general threshold Change the upper null zone Mounting position Rosemount 1408H Level Transmitter...
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D. Reported level Possible cause Product surface is within the Upper Null Zone and a disturbance echo is interpreted as the product surface. Recommended actions • Check the setting of the Upper Null Zone. Related information Change the upper null zone Emerson.com/Rosemount...
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Measured level fluctuates Figure 7-5: Symptom A. Level B. Time C. Reported level Possible cause Excessive foaming or turbulence. Recommended actions • Under turbulent conditions with low level rates, consider increasing the Damping value. Related information Damping value Rosemount 1408H Level Transmitter...
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Figure 7-6: Symptom A. Level B. Time C. Actual level D. Reported level Possible cause The product surface is close to a suppressed false echo. Recommended actions • If possible, remove the disturbing object. Related information Analyze the echo peaks Emerson.com/Rosemount...
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C. Actual level D. Reported level Possible cause Damping value is set too high. Recommended actions • If there is a problem with lag during rapid level changes, consider decreasing the Damping value. Related information Damping value Rosemount 1408H Level Transmitter...
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B. Time C. Actual level D. Reported level Possible cause Upper Range Value is not set correctly. Recommended actions • Check that the Upper Range Value matches the 100% (20 mA) level in the tank. Related information Upper/lower range value Emerson.com/Rosemount...
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A. Level B. Time C. Actual level D. Reported level Possible cause A strong double bounce echo is interpreted as the product surface. Recommended actions • Move the transmitter to another position. Related information Mounting position Rosemount 1408H Level Transmitter...
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Measured value drops to zero level in the tank bottom region. Figure 7-10: Symptom A. Level B. Time C. Actual level D. Reported level Possible cause Transmitter has locked on a strong tank bottom echo. Recommended actions • Verify the Reference Height is configured correctly. Related information Reference height Emerson.com/Rosemount...
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"Level measurement lost". Recommended actions • Before opening the manway cover, disconnect power to the transmitter. • After closing, restart the device. • Move the transmitter to another position. Related information Restart the device Mounting position Rosemount 1408H Level Transmitter...
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"Level measurement lost". The message is cleared when start filling the tank. Recommended actions • Before opening the manway door, disconnect power to the transmitter. • After closing, restart the device. • Move the transmitter to another position. Related information Restart the device Mounting position Emerson.com/Rosemount...
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Bottom offset 7.3.2 Troubleshooting the 4-20 mA/HART output Device milliamp reading is zero Recommended actions 1. Verify power is applied to signal terminals. 2. Verify power supply voltage is adequate at signal terminals. Related information Power supply Rosemount 1408H Level Transmitter...
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1. Verify power supply voltage is adequate at signal terminals. 2. Check load resistance (250 ohms minimum). 3. Check if device is at an alternate HART address. 4. Check current analog output value to verify that device hardware works. Related information Power supply HART/polling address Emerson.com/Rosemount...
Before changing the factory default value, study the position and amplitude of the different echo peaks. Procedure 1. Select Service Tools → Echo Tuning → Thresholds. 2. Select Set General Threshold and follow the on-screen instructions. Alternatively, the threshold can be split into up to 10 segments. Rosemount 1408H Level Transmitter...
Echo tracked as the current surface echo Unknown Echo identified as unknown (can be a surface candidate) Irrelevant Echoes that are identified but suppressed by the device Tank bottom echo Echo considered as an echo from the tank bottom Emerson.com/Rosemount...
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2. Select Restart Device and follow the on-screen instructions. 7.5.5 Restore to default settings This function restores the transmitter to default settings (user configuration is overwritten). Procedure 1. Select Service Tools → Maintenance → Reset/Restore. 2. Select Restore Default Settings and follow the on-screen instructions. Rosemount 1408H Level Transmitter...
Returned products must include a copy of the required Safety Data Sheet (SDS) for each substance. Emerson representatives will explain the additional information and procedures necessary to return goods exposed to hazardous substances.
Measurement is possible up to 49 ft. (15 m) if there is good reflection of the product surface (dielectric constant >10, i.e. water based media). Note though that a combination of adverse process conditions, such as heavy turbulence, foam, and condensation, together with products with poor reflection may affect the measuring range. Rosemount 1408H Level Transmitter...
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Conducted immunity is only tested according to EN 61326-1. Pressure Equipment Directive (PED) Complies with 2014/68/EU article 4.3 Radio approvals • Radio Equipment Directive (2014/53/EU): — ETSI EN 302 372 — EN 62479 • Part 15 of the FCC Rules • Industry Canada RSS 211 Emerson.com/Rosemount...
HART protocol. The digital HART signal can ® be used in multidrop mode. HART revision Time from when power is applied to the transmitter until performance is within specifications. Rosemount 1408H Level Transmitter...
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Volume flow: US gal/h, m • Temperature: °F, °C • Signal strength: mV Output variables Variable 4-20 mA Digital output Level ✓ ✓ Distance (ullage) ✓ ✓ Volume ✓ ✓ Volume flow ✓ ✓ Electronics temperature ✓ Level rate ✓ Signal strength ✓ Emerson.com/Rosemount...
Figure A-2: Ambient Temperature vs. Process Temperature 176 (80) 104 (40) (-40) (80) (150) -40 (-40) A. Ambient temperature °F (°C) B. Process temperature °F (°C) Storage temperature -40 °F to 194 °F (-40 °C to 90 °C) Rosemount 1408H Level Transmitter...
Emerson is not in a position to evaluate or guarantee the compatibility of the process fluid or other process parameters with the product, options, configuration, or materials of construction selected.
PTFE sealing: PTFE fluoropolymer • O-ring: FVMQ • G1 thread: 316L (EN 1.4404) • Profile ring: FKM Adapter not included. IP68 at 9.8 ft. (3 m) for more than 30 minutes. Tested for NEMA 4X by Intertek. Rosemount 1408H Level Transmitter...
Specifications and reference data Reference Manual May 2024 00809-0400-4480 A.4 Dimensional drawings Related information Type 1 Drawing A.4.1 Transmitter Figure A-3: Rosemount 1408H Ø 2.32 (59) 2.99 (76) 5.79 4.76 (147) (121) 0.39 (10) A. ISO 228/1-G1 thread B. M12 male connector (A-coded) C.
HART/polling address The address range is 0 to 63. The transmitter operates in either standard mode with a 4–20 mA output signal or in multidrop. When the transmitter is in multi-drop mode, the current output is fixed to 4 mA. Emerson.com/Rosemount...
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4-20 mA range values. Note The 20 mA point should be set below the reduced accuracy zone at the top of the tank. Rosemount 1408H Level Transmitter...
The high/low alarm current for the analog output when the device enters the alarm mode. Related information Analog signal on alarm High/low saturation value The device will continue to set a current that corresponds with the measurement until reaching the upper/lower limit (and then freeze). Related information Analog saturation levels Emerson.com/Rosemount...
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The date field can be used for any purpose, for example to save the date of the last configuration change. Descriptor The 16-character descriptor field can be used for any purpose. Message The 32-character message field can be used for any purpose, such as providing details of the last configuration change. Rosemount 1408H Level Transmitter...
The Bottom Offset is defined as the distance between Zero Level and the tank bottom. The default value is zero. If the Zero Level is not located at the tank bottom, then enter a Bottom Offset. It is needed for the transmitter to know the position of the tank bottom. Emerson.com/Rosemount...
Volume flow table The volume flow table is used to convert the measured level into a volume flow rate. Up to 30 level-volume flow pairs can be entered. The level points must be entered in increasing order. Rosemount 1408H Level Transmitter...
B.3.4 Advanced Calibration offset Difference between surface distance measured by transmitter and the same distance measured by, for example, hand-dipping with a measurement tape. A positive Calibration Offset value will increase the presented level value. Emerson.com/Rosemount...
You can extend this value to block out disturbing echoes close to the antenna, for example from the tank nozzle. Note Make sure the 20 mA value is below the Upper Null Zone. Measurements are not performed within the Upper Null Zone (UNZ). Rosemount 1408H Level Transmitter...
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The Measurement Recovery Time (Echo Timeout) parameter controls the maximum time from when measurement is lost (e.g. due to process conditions such as foam or turbulence) until it is annunciated. If measurement is recovered within the time specified by this parameter, then it will not be annunciated. Emerson.com/Rosemount...
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Emerson Terms and Conditions of Sale are available upon request. The Emerson logo is a trademark and service mark of Emerson Electric Co. Rosemount is a mark of one of the Emerson family of companies. All other marks are the property of their respective owners.
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