Electrostatic Charge - Endress+Hauser Proservo NMS5 Operating Instructions Manual

Proservo NMS5
Endress+Hauser
1.5

Electrostatic Charge

Mounting with a stilling well is recommended for use in a tank which contains flammable liquid with conduc-
tivity at 10 S/m or less.
-8
In case of installation without a stilling well, allow enough stilling time according to the table below before
lowering the level gauge down to the liquid surface. When a stilling well is used, the stilling time is shown as
in column "<10" in the table below.
conductivity
(S/cm)
-8
≥10
-12 -8
10 ~10
-14 -12
10 ~10
-14
≤10
Reference: Stilling Time (min.)
Liquid Volume in Tank (m
≤10 10~50
≥1 ≥1
≥2 ≥3
≥4 ≥5
≥10 ≥10
(Japan National Institute of Occupational Safety and Health)
1 Safety Instructions
3
)
50~100 ≥5000
≥1 ≥2
≥10 ≥30
≥60 ≥120
≥120 ≥240
5