Fluid Components International CMB - Manual (Page 30)

5. Application domain of the CT transmitter
The microprocessor controlled CT transmitter (referred to as CT) for use with CMM, CMB and CMU sen-
sors is a programmable transmitter that processes measurement data and displays and transmits various
types of measurement results.
The CT is communication enabled and supports both the HART
® protocol and Profibus-PA. The device
can be customized using control unit BE2. Although basic configuration settings such as transmitter cali-
bration are realized at the factory, other settings such as those for measurement data processing, analy-
sis, display and output are user definable.
User settings are protected by a user definable password.
Settings that are essential for proper operation of the transmitter in conjunction with the sensor (e.g. cali-
bration and initialization values) are accessible only to service technicians via a password that is not pro-
vided to customers.
6. CT transmitter: mode of operation and configuration
6.1 Measuring principle
The Coriolis mass flowmeter is based on the principle whereby in a rotating system a force (known as
Coriolis force) is exerted on a mass at a rotation point that is moving towards or away from this point. By
configuring the sensor in a specific fashion, this force can be used to measure mass flow directly. The CT
transmitter evaluates the sensor signal (see Section 3.2.1 Measuring principle on page 14).
Page 30 of 106
CMB & CT OPERATING MANUAL