Siemens SITRANS LVL200E Руководство по эксплуатации - Страница 12

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Suitability for the process

conditions

Switching point

Mounting

4.1

Make sure that all parts of the instrument coming in direct contact

with the process, especially the sensor element, process seal and

process fitting, are suitable for the existing process conditions, such

as process pressure, process temperature as well as the chemical

properties of the medium.

You can find the specifications in chapter "Technical data" and on the

nameplate.

In general, SITRANS LVL200E can be installed in any position. The

instrument only has to be mounted in such a way that the tuning fork

is at the height of the desired switching point.

The tuning fork has lateral markings (notches) that indicate the

switching point with vertical mounting. The switching point applies

to water in conjunction with the basic setting of the density switch

≥ 0.7 g/cm³ (0.025 lbs/in³). When mounting SITRANS LVL200E, make

sure that this marking is at the height of the requested switching point.

Keep in mind that the switching point of the instrument will shift if the

medium has a density other than water - water is 1 g/cm³ (0.036 lbs/

in³). For products ≤ 0.7 g/cm³ (0.025 lbs/in³) and ≥ 0.5 g/cm³

(0.018 lbs/in³) the density switch must be set to ≥ 0.5 g/cm³.

Keep in mind that foams with a density ≥ 0.45 g/cm³ (0.016 lbs/in³)

are detected by the sensor. This can lead to erroneous switchings,

particulary when the sensor is used for dry run protection.

SITRANS LVL200E - Operating Instructions

*7ML19985KY01*