Permissible Differing Application Conditions; Protection Against Static Electricity; Installation/Construction; Impact And Friction Sparks - SICK NAMUR LFV 310 Instructions

3.3

Permissible differing application conditions

The LFV 310/330.C******N/W** (also with lock fitting ARV-SG63.2/3**) can also be operated as
category 1/2G instrument according to the conditions mentioned below.
Temperature class
T4, T3, T2, T1
Note:
If the abovementioned application conditions in the area of the sensor are different when
using LFV 310/330.C******N/W** as category 1/2G instrument, please make sure that the
sensor does not heat up (even in case of malfunctions). It is the responsibility of the plant
operator to make sure the pressure/temperature of the processed materials presents no
danger.
The permissible pressures and temperatures for operation are mentioned in the operating
instructions manuals.
4

Protection against static electricity

The LFV 310/330.C******N/W** (also with lock fitting in versions ARV-SG63.2/3), with electrostati-
cally chargeable plastic parts, such as e.g. plastic housing, metal housing with inspection window,
with plastic coated sensors or distance tube, have a caution label pointing out the safety measures
that must be taken with regard to electrostatic charges during operation.
Caution: Plastic parts! Danger of electrostatic charging!
•
Avoid friction
•
No dry cleaning
•
Construction/Installation: The LFV 310/330.C******N/W** must be constructed/installed in such
a way that
– electrostatic charges are ruled out during operation, maintenance and cleaning.
– process-related electrostatic charges, e.g. by measuring media flowing past, are ruled out
5

Installation/construction

The LFV 330.C******N* must be mounted in a way that adequately ensures that the sensor tube
will not oscillate, vibrate or bend due to the movements of other installations or the medium in the
vessel.
6

Impact and friction sparks

The LFV 310/330.C******N/W** must be mounted in such a way that sparks from impact and fric-
tion between aluminium and steel (except stainless steel, if the presence of rust particles can be
excluded) cannot occur.
7

Use of an overvoltage arrester

If the LFV 310/330.C******N/W** are used as category 1/2G instruments, overvoltage protection
measures according to EN 60079-14 chapter 12.3 are not required.
When used as category 1G instrument, a suitable overvoltage arrester must be connected in front
8
Temperature on the sen-
sor
-20 ... +60 °C
WARNING- POTENTIAL ELECTROSTATIC
CHARGING HAZARD - SEE INSTRUCTIONS
Ambient temperature on
the electronics
-40 ... +90 °C
Process pressure
0 ... 6 bar
LFV 310/330