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May 2014
2
Quick Start Guide
NOTICE
This installation guide provides basic guidelines for the Rosemount 644. It does not provide
instructions for detailed configuration, diagnostics, maintenance, service, troubleshooting, or
installation. Refer to the 644 Reference Manual (document number 00809-0100-4728) for
more instruction. The manual and this QSG are also available electronically on
www.rosemount.com.
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 practices. Please review the
Product Certifications for any restrictions associated with a safe installation. In an
Explosion-Proof/Flame-Proof installation, do not remove the transmitter covers when power is
applied to the unit.
Process leaks may cause harm or result in death.
Install and tighten thermowells or sensors before applying pressure.
Do not remove the thermowell while in operation.
Electrical shock can result in death or serious injury.
Avoid contact with the leads and terminals. High voltage that may be present on leads can
cause electrical shock.
Contents
Configure (bench calibration) . . . . . .page 3
Verify configuration . . . . . . . . . . . . . . .page 4
Set the switches . . . . . . . . . . . . . . . . . .page 7
Mount the transmitter . . . . . . . . . . . .page 8
Wire and apply power . . . . . . . . . . page 12
Perform a loop test . . . . . . . . . . . . page 15
Product Certifications . . . . . . . . . . page 16