Siemens SITRANS LVL100 사용 설명서 - 페이지 8

{카테고리_이름} Siemens SITRANS LVL100에 대한 사용 설명서을 온라인으로 검색하거나 PDF를 다운로드하세요. Siemens SITRANS LVL100 32 페이지. Vibrating switches
Siemens SITRANS LVL100에 대해서도 마찬가지입니다: 사용 설명서 (32 페이지), 사용 설명서 (33 페이지), 사용 설명서 (32 페이지)

페이지 인쇄

Functional principle

Voltage supply

It functions even under difficult conditions such as turbulence, air bub-

bles, foam generation, buildup, strong external vibration or changing

products.

Function monitoring

The electronics module of SITRANS LVL100 continuously monitors

the following criteria via frequency evaluation:

•

Strong corrosion or damage on the tuning fork

•

Loss of vibration

•

Line break to the piezo drive

If a malfunction is detected or in case of voltage supply, the electron-

ics takes on a defined switching status, i.e. the contactless electronic

switch opens (safe state).

The tuning fork is piezoelectrically energised and vibrates at its me-

chanical resonance frequency of approx. 1100 Hz. When the tuning

fork is submerged in the product, the frequency changes. This change

is detected by the integrated electronics module and converted into a

switching command.

SITRANS LVL100 is a compact instrument, i.e. it can be oper-

ated without external evaluation system. The integrated electronics

evaluates the level signal and outputs a switching signal. With this

switching signal, a connected device can be operated directly (e.g. a

warning system, a pump etc.).

The data for power supply are specified in chapter "Technical data".

3.3

Adjustment

The switching status of SITRANS LVL100 can be checked when

the housing is closed (signal lamp). Products with a density > 0.7 g/

cm³ (0.025 lbs/in³) or ordered optionally with a density > 0.5 g/cm³

(0.018 lbs/in³) can be detected.

3.4

Supplementary cleaning procedures

3.4.1 Oil, grease and silicone-free

The SITRANS LVL100 is also available in the version "Oil, grease

and silicone-free". These instruments have passed through a special

cleaning procedure to remove oil, grease and paint-wetting impair-

ment substances (PWIS).

The cleaning is carried out on all wetted parts as well as on surfaces

accessible from outside. To keep the purity level, the instruments are

immediately packed in plastic foil after the cleaning process. The

purity level remains as long as the instrument is kept in the closed

original packaging.

Caution:

The SITRANS LVL100 in this version must only be used in oxygen

applications.

SITRANS LVL100 - Operating Instructions