OPERATING MANUAL HPC & UMC4
Page 21 of 105
4.5
Process conditions
4.5.1 Process temperature
− 40 °C to 180 °C (-40 °F to 356 °F); rating plate specifications are to be observed
4.5.2 Physical state
Liquid product
(maximum density 2 kg/l)
Gaseous product
(minimum density 0.002 kg/l in operating state)
4.5.3 Viscosity
0.3 to 2,000 mPas (0.3 to 2,000 cP)
4.5.4 Gas content
The use of products containing gas will increase the measurement error. To have any chance of
achieving an acceptable measurement of a gaseous liquid, it is essential that the gas bubbles are as
small as possible and that they are homogeneously distributed in the fluid. Large gas bubbles will pro-
voke grave measurement errors, and may also shift the zero point. Thus, the process conditions
gravely influence the measurement accuracy of the meter. With this in mind, a rule of thumb is: 1 %
gas component will increase false readings by 1 %. The gas component to exceed 5 %.
4.5.5 Process temperature range
+ 180 °C (356 °F)
4.5.6 Process pressure range
According to PN100 pressure rating = 100 bar / PN 320 320bar / PN400 = 400 bar
4.5.7 Outlet pressure
Outlet pressure must be greater than the vapor pressure ps of the measured product.
4.6
Connection to the transmitter
In consideration of its small dimensions, the transmitter cannot be mounted directly onto the
HPC sensor.
The connection to the sensor is achieved by means of a detachable cable connector.
During installation, regulations and applicable legal standards are to be adhered to.
The maximum cable length is 300 m (1000ft). See Section 12.5.1.2
page 37 for information regarding the connection and cable specifications.
