Instruction manual

Mounting
14 Installation and Operations Manual
Behavior if measuring range is exceeded
The behavior in case of the measuring range being exceeded can be freely set: The default
setting is a current of 22 mA and the generation of a digital warning (E681).
Measuring range
The usable measuring range depends on the size of the antenna, the reflectivity of the medium,
the mounting location, and eventual interference reflections.
The following tables describe the groups of media as well as the achievable measuring range as
a function of application and media group. If the dielectric constant of a medium is unknown, it
is recommended to assume media group B to ensure a reliable measurement.
Table 4-2: Measuring Range
Figure 4-4: Measuring Range Depending on Product Class
Media group DC (r) Examples
A 1.4 to 1.9 non-conducting liquids, e.g. liquefied gas (LPG). For more information
please contact your Varec representative.
B 1.9 to 4 non-conducting liquids, e.g. benzene, oil, toluene, white products, black
products, crudes, bitumen/asphalts, …
C 4 to 10 e.g. concentrated acids, organic solvents, esters, aniline, alcohol, acetone,
…
D > 10 conducting liquids, e.g. aqueous solutions, dilute acids and alkalis
Media group Stilling well/ Bypass
Measuring range
7532  DN150
A DC (
r) = 1.4 to 1.9 38 m (124 ft)
B DC (r) = 1.9 to 4 38 m (124 ft)
C DC (r) = 4 to 10 38 m (124 ft)
D DC (r) > 10 38 m (124 ft)
max. measuring range with
custody transfer approvals
25 m (82 ft) (NMi)
30 m (98 ft) (PTB)