Text from page 10 of catalogue Capacitive level measuring systems
Page 10 of catalogue Capacitive level measuring systems of Rechner Industrie-Elektronik GmbHMOUNTING
The analogue probe consists of a reference system (R) at the top of the probe to determine the existing material characteristics. This reference range stretches over 85 mm independent of type. Then follows the actual analogue measuring range (M) customer specified, but with regard to the total length (L = max. 2 m).The inactive range (IB), a minimum of 50 mm, serves to mount the probe. The mounting can also be a metallic holder (fig. 1)
The measuring range (M) of the probe must be mounted in a range of the Container without change in diameter of the cross section in order to guarantee the linearity of the output signal. Changes in cross section lead to non-linearity, due to conductive installations such as wipers for example. The reference system (R) does not require a constant cross section of the container. Thus it can project into the cone of the container. The non-active range (IB) from the measuring range to the top of the container (if metal) should be not less than 50 mm in order to prevent non-linearity (Fig. 2)
¼D IB M
1/3D, min. 50 mm
Connect the BE container earth over the shortest distance !
Measuring range (M) Reference range (R) non-active range (IB) Do not mount the measuring range in the area of the container with changes in the cross section, like the cone range.
The probe can be mounted centrically or eccentrically. For a measurement independent of the filling cone, we recommend that the probe be mounted at a ¼ of the diameter. The minimum distance between the upper switching point and the conductive lid of the container is 50 mm.
RECHNER Industrie-Elektronik GmbH • Gaußstraße 8-10 • D-68623 Lampertheim • Tel. (0 62 06) 50 07-0 • Fax (0 62 06) 50 07-36 • e-mail: info@rechner-Sensors.de • www.rechner-sensors.com
All specifications are subject to change without notice. (10/2008)