Lightning Audio 7532 - Manual (Page 50)

Commissioning Radar Tank Gauge
50 Installation and Operations Manual
Function "medium property" (003)
This function is used to select the dielectric constant.
Selection:
• unknown
• < 1.9
• 1.9 ... 4
• 4 ... 10
• > 10
3)Treat Ammonia NH3 as a medium of group A, i.e. always use a stilling well.
⇒
E + –
Product class DK (
e
r) Examples
A 1,4 … 1,9 non-conducting liquids, e.g. liquefied gas 3)
B 1,9 … 4 non-conducting liquids, e.g. benzene, oil, toluene, …
C 4 … 10 e.g. concentrated acids, organic solvents, esters, aniline,
alcohol, acetone, …
D > 10 conducting liquids, e.g. aqueous solutions, dilute acids and
alkalis