KROHNE BM 100A EN - Manual (Page 27)

Installation and operating instructions BM 100 A 27
4.3 Probe measurement limits
Probe measurement limits
Probe type Top dead
zone, A1
ε
r
= 80*
Bottom dead
zone, A2
ε
r
= 80*
Top dead
zone, A1
ε
r
= 2.4*
Bottom dead
zone, A2
ε
r
= 2.4*
Twin rod Ø10 mm
or 0.4” (type A) 250 mm / 9.8” 20 mm / 0.8” 330 mm / 13” 100 mm / 3.9”
Twin cable Ø6 mm
or Ø0.24” (type B) 250 mm / 9.8” 20 mm / 0.8” 330 mm / 13” 100 mm / 3.9”
Twin cable Ø4 mm
or Ø0.16” (type L) 250 mm / 9.8” 20 mm / 0.8” 330 mm / 13” 100 mm / 3.9”
Coaxial Ø28 mm
or Ø1.1” (type D) 0 mm / 0” (**) 10 mm / 0.4” 0 mm / 0” (***) 100 mm / 3.9”
Single rod Ø10 mm
or Ø0.4” (type F) 400 mm / 15¾” 20 mm / 0.8” 500 mm / 19.7” 100 mm / 3.9”
Reverse Ø10 mm
or Ø0.4” (type G) 50 mm / 2” 250 mm / 9.8” N/a N/a
Single cable Ø4 mm
or Ø0.16” (type H) 400 mm / 15¾” 20 mm / 0.8” 500 mm / 19.7” 100 mm / 3.9”
Single cable Ø8 mm
or Ø0.31” (type K) 400 mm / 15¾” 20 mm / 0.8” 500 mm / 19.7” 100 mm / 3.9”
* The dielectric constant, ε
r
, of water is 80. The dielectric constant, ε
r
, of oil is 2.4.
** 20 mm / 0.8” for Ex version.
***
50mm / 2” for Ex version.