NAMUR NE 21 standard 644 HART transmitter complies with NAMUR NE21 grade requirements. 2, self-calibration by comparing the dynamic measurement to extremely stable and accurate internal reference elements, transmitter analog / digital measurement circuit for each temperature update into the automatic calibration. 3, vibration 644 meet the following specifications, but no effect on performance: Frequency shaken for 10 至 60 Hzo of 1 mm displacement 60 至 500 Hz 39 4 peak acceleration sensor 644 sensor connection 2-wire connection RTD 3 wire RTD 4-wire resistive temperature detector thermocouple and millivolt and ohm meter Rosemount Inc. for every single element resistance temperature detector provides 4-wire sensors. By unneeded leads disconnected and insulated with electrical tape, you can use these 3-wire configuration of the electrical wake temperature detectors. 5, the stability of the resistance temperature detectors and thermocouples, transmitters stability within 24 months to reach:. ± 0 15% of reading, or 0.15 ℃ (whichever is greater) Fourth, the technical specifications 1, Resource Block The Resource block contains physical transmitter information, including: the available memory, manufacture identification, device type, software, signage, and a unique identifier. 2, the transducer block Transducer Block contains the actual temperature measurement data, including sensor 1 and terminal temperature. It includes the following information: sensor type and configuration, engineering units, linearization, re-ranging, damping, temperature calibration and diagnostics. 3, LCD Block LCD block is used to configure the local display (if you are using the LCD monitor). Analog input (Al) processing of measured data to make it available on the fieldbus segment allows filtering, alarming, and engineering unit changes. 4, the control function block PIO transmitter through a transmitter PIO block. PIO block can be used to perform single loop at the scene, before a cascade or feed forward control. Immediate function blocks of all transmitters used in the function block is immediate, namely: the total number of function blocks is only limited by the physical memory of the transmitter that is available. Because only immediate block to use physical memory, so they do not exceed the physical memory storage capacity at any given time can use any combination of function blocks. 5, the start time when the damping value is set to O seconds, within 20 seconds after the transmitter power is turned on to meet performance specifications within range. 6. Status If self-diagnostics detect a sensor is burned or faulty transmitter, measurement status will be updated accordingly. PIO status can also be sent to a safe value output. With standard fieldbus power supply for the FOUNDATION fieldbus power supply. Transmitter operation, voltage 9 to 32 VDC, maximum current of 11mA. Transmitter power terminals are rated to 42.4 VDC. 7, alarm analog input (Al) function block allows the user to adopt different priorities and hysteresis settings to configure the alarm to: a high, high, low, or low-low mode. Backup Link Active Scheduler (LAS) The transmitter is used as a device link master, that is: if the current link master fails or removal from the network, the transmitter can be used as a Link Active Scheduler role. With the host or other configuration tool will be applied to the scheduling timetable download link master device. Under no link master, the transmitter will act as a link active scheduler application and permanent control of the network segment. 8, field software can be easily upgraded in the field to be used with Foundation Fieldbus 644 software upgrade. By application software loaded in the device memory, users can take advantage of software enhancements. V. Rosemount 4-20mA / HART Specifications 1, communication requirements transmitter power terminals are rated to 42.4V dc. HART Communicator requires a loop resistance between 250 and 1100 ohms. When the transmitter terminal voltage is below 12Vdc, 644 HART device does not communicate. 2, the power HART devices require an external power supply. Transmitter operation, transmitter terminal voltage between 12. 0 至 42. 4 Vdc, load resistance between 250-660 ohms. The minimum power requirements 17.75Vdc load is 250 ohms. Transmitter power terminals rated for 42.4vdc. The maximum load is 40.8x (voltage -12.0) 3, hardware and software failure mode 644 has software-driven alarm diagnostics. When the microprocessor software fails, the independent circuits designed to provide backup alarm output. Users can select alarm direction by using the failure mode switch (high / low). If a fault occurs, switch position determines the direction of the drive output (high or low). People switch to feed the information to a digital / analog (D / A) converter, even when the microprocessor has failed, the converter can drive right alarm output. Transmitter in fault mode driver output desired value depends on whether it is configured to standard, custom, or NAMUR-compliant operation. 4, custom alarm and saturation levels using the option code Cl, alarm and saturation levels of the plant configuration can be used to customize RMS. These values ??can also be configured using the date AR Ding communication device in the field. Start time when the damping value is set to O seconds, the transmitter within 5 seconds after power is turned on to meet performance specifications within range. Transient Protection The Rosemount 470 prevents induction transients due to lightning, welding, or heavy electrical equipment and cause damage to loose control. 5, configure the transmitter can be used to configure the transmitter HART or FOUNDATION fieldbus (see Standard Foundation fieldbus configuration) standard configuration settings. By Fisher - Rosemount Systems DeltaV? , AMSinside or other FOUNDATION fieldbus host or configuration tool available on-site changes to the configuration settings and block configuration. 6, when ordering a custom configuration to specify a custom configuration. The configuration must be the same for all sensors. The following table lists specify a custom configuration of the necessary requirements.