KROHNE MFC 010 C Converter - Manual (Page 7)

MFC010 Interface Manual 5
1. Introduction
The MFC010 is a s tand al one s ignal c onverter des igned t o di rectly i nterface t he O PTIMASS and
OPTIGAS f amilies of C oriolis m ass f lowmeters into c ontrol s ystems us ing t he M odbus R TU protocol
where t here i s no r equirement f or t he ex tensive out put c ontrol features provided by more expensive
converter solutions.
The MFC010 performs three primary direct measurements, Mass flow, Density and Temperature. Using
these primary measurements the MFC010 is able t o c alculate an ar ray of s econdary v alues s uch as
Volume Flow, Velocity and Concentration.
Mass Flow
– Mass flow measurement doesn’t come any simpler, once installed just perform a “ Zero
Calibration”, “ Reset” t he “ Totalisers” and aw ay y ou go. W here P rocess noi se i s a nui sance use the
“Measurement T ime C onstant”, “ Low F low T hreshold” and “ Pressure S uppression” features to provide
reliable and repeatable results.
Density
– Using the inverse relationship between the Density of the process product and the oscillation
frequency of the measuring tube, the MFC010 can provide a very accurate and reliable Density reading.
In or der t o m aximise t he ex cellent per formance o f the MFC010 the user s hould per form a dens ity
calibration after installation. T he MFC010 provides two forms of Density Calibration, the simple “Single
Point Calibration” and t he more accurate “Two Point Calibration”. U sing the “Density Averaging” feature
the user can reduce noisy readings caused by process installation and noise. NB. Density measurement
is not available with the OPTIGAS 5000 meters.
Concentration
– Using the “Density” and “Temperature” m easurements t he M FC010 i s c apable of
calculating the concentration of a pr oduct in the process medium, from one of a num ber of pre-defined
industry standards, such as “ °Brix” a nd “ °Baumé”, as w ell as us er def ined m ixtures us ing t he
programmable coefficients. Concentration measurement is a f unction that comes with a c omprehensive
manual and a Coefficient calculation software package which will take the users own process data and
convert it into compatible coefficients to permit the MFC010 to automatically calculate the concentration of
the target process.
Velocity
– Using the measured mass flow and density, the velocity of the product is calculated using the
“Pipe Diameter” setting. By default this is set to the measuring tube internal diameter to calculate the
velocity of the product passing through the sensor, but it can be set to calculate the velocity in a section of
the connecting pipe work.
Process Control
– Where precise process conditions are required, the “Process Control” function can be
used t o det ect adv erse v ariations i n t he “ Density” or “ Temperature” m easurements and, as well as
indicating the condition, it can take one of a num ber of pr edefined ac tions ac cording t o t he us ers
requirements.
2. Mechanical Installation
Refer t o t he i nstallation gui delines and i nstructions f or m ounting t he s ensor i n t he process pipe work
provided in the handbook on the CD supplied with the sensor.