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44
Reference Manual
00809-0100-4728, Rev MB
July 2016
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
Appendix A: Specifications and Reference Data
for sensing element operating limits. Mount the
transmitter so it is not susceptible to vibration and mechanical shock and does not have external contact
with corrosive materials.
Failure to follow these installation guidelines could result in death or serious injury.
Make sure only qualified personnel perform the installation.
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 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.
Process leaks could result in death or serious injury.
Do not remove the thermowell while in operation.
Install and tighten thermowells and sensors before applying pressure.
Electrical shock could cause death or serious injury.
Use extreme caution when making contact with the leads and terminals.
Summary of Contents for Rosemount 644 HART
Page 2: ......
Page 16: ...6 Reference Manual 00809 0100 4728 Rev MB Introduction July 2016 Introduction ...
Page 86: ...76 Reference Manual 00809 0100 4728 Rev MB Troubleshooting July 2016 Troubleshooting ...
Page 138: ...128 Reference Manual 00809 0100 4728 Rev MB Index July 2016 Index ...
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