Warnings; Considerations; Installation Considerations; Environmental Considerations - Emerson Rosemount 644 Reference Manual

Section 3: Hardware installation
April 2015
3.2.1

Warnings

Failure to follow these installation guidelines could result in death or serious injury.
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Explosions could result in death or serious injury.
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Process leaks could result in death or serious injury.
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Electrical shock could cause death or serious injury.
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3.3

Considerations

3.3.1

Installation considerations

Measurement accuracy depends upon proper installation of the transmitter. Mount the
transmitter close to the process and use minimum wiring to achieve best accuracy. Keep in mind
the need for easy access, personnel safety, practical field calibration, and a suitable transmitter
environment. Install the transmitter to minimize vibration, shock, and temperature fluctuation.
3.3.2

Environmental considerations

Best practice is to mount the transmitter in an environment that has minimal ambient
temperature change. The transmitter electronics temperature operating limits are –40 to 185 °F
(–40 to 85 °C). Refer to
operating limits. Mount the transmitter so that it is not susceptible to vibration and mechanical
shock and does not have external contact with corrosive materials.
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Make sure only qualified personnel perform the installation.
Do not remove the connection head cover in explosive atmospheres when the
circuit is live.
Before connecting a 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.
Verify the operating atmosphere of the transmitter is consistent with the appropriate
hazardous locations certifications.
All connection head covers must be fully engaged to meet explosion-proof
requirements.
Do not remove the thermowell while in operation.
Install and tighten thermowells and sensors before applying pressure.
Use extreme caution when making contact with the leads and terminals.
Appendix A: Specifications and Reference Data
Reference Manual
00809-0200-4728, Rev RA
for sensing element
Hardware Installation