EMERSON艾默生 Manual Rosemount 644 Temperature Transmitter说明书用户手册.pdf

Reference Manual 00809-0200-4728, Rev SF January 2023 ™ Rosemount 644 Temperature Transmitter ® with HART Protocol Safety messages NOTICE Read this document before working with the product. For personal and system safety, and for optimum product performance, ensure you thoroughly understand the contents before installing, using, or maintaining this product. For technical assistance, contacts are listed below: Customer Central Technical support, quoting, and order-related questions. United States - 1-800-999-9307 (7:00 am to 7:00 pm Central Time) Asia Pacific- 65 777 8211 Europe/Middle East/Africa - 49 (8153) 9390 North American Response Center Equipment service needs. 1-800-654-7768 (24 hours—includes Canada) Outside of these areas, contact your local Emerson representative.  WARNING Follow instruction Failure to follow these installation guidelines could result in death or serious injury. Ensure only qualified personnel perform the installation. Explosion 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 handheld communicator in an explosive atmosphere, ensure that the instruments in the loop are installed in accordance with intrinsically safe or non-incendive field wiring practices. Verify that the operating atmosphere of the transmitter is consistent with the appropriate hazardous locations certifications. All connection head covers must be fully engaged to meet