Aktek ALIT-TIF 사용자 설명서 - 페이지 8

{카테고리_이름} Aktek ALIT-TIF에 대한 사용자 설명서을 온라인으로 검색하거나 PDF를 다운로드하세요. Aktek ALIT-TIF 16 페이지. Ultrasonic level meter

Aktek Endüstriyel Ekipman ve Enstrümantasyon Ltd. Şti

2. Installation

Reasonable installation is critical factor of the instrument's normal working.

2.1.1 general hints

 Installation must be carried out by trained person in accordance with the

manual.

 The temperature of the process may not exceed 60℃，and the pressure

may not exceed ±0.1 MPa.

 The use of metallic fittings or flanges is not recommended.

 For exposed or sunny locations a protective hood is recommended.

 Make sure the distance between the probe and the maximum level

exceeds the blacking distance, because the probe cannot detect any

liquid or solid surface closer than the blacking distance to the probe's

face.

 Install the instrument at right angles to the surface of the measuring

material.

 Obstructions within the beam angle generate strong false echoes.

Wherever possible, the transmitter should be positioned to avoid false

echoes.

 The beam angle is 8°, in order to avoid large echo loss and false echo,

the probe should not be mounted closer than 1 m to the wall. it is

advisable to maintain a distance of at least 0.6m from the center line of

the probe for every foot (10cm per meter) range to the obstruction.

2.1.2 hints for liquid surface conditions

 Foaming liquids can reduce the size of the returned echo because foam

is a poor ultrasonic reflector. Mount an ultrasonic transmitter over an

area of clear liquid, such as near the inlet to a tank or well. In extreme

conditions, or where this is not possible, the transmitter may be

mounted in a vented stilling tube provided that the inside

measurement of the stilling tube is at least 4 in. (100 mm) and is

smooth and free from joints or protrusions. It is important that the

bottom of the stilling tube stays covered to prevent the ingress of

foams.

 Avoid mounting the probe directly over any inlet stream.

 Liquid surface turbulence is not normally a problem unless it is excessive.

The effects of turbulence are minor, but excessive turbulence can be