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s) Horn adapter ST–G1 (ULM–53_–02) and

ST–G1,5 (ULM–53_–06) for improved trans-

mitted signal reception can be used in open

channels, sumps, tanks, etc.

Horn adapter increases the radiation directiv-

ity of acoustic waves, improves reception of

weak echoes (unstable level surfaces, solid

materials, etc.) and reduces the risk of false

reflections.

u) The horn adapter is installed to level meters

via process connection G1" (ST–G1) or G1½"

(ST–G1,5).

8. E

lECTriCal CONNECTiON

The ultrasonic level meter is designed

to be connected to supply unit or to con-

troller through two or three-wire cable

with outer diameter 6 ÷ 8 mm (recom-

mended cross section of cores 0.5 mm

to 0.75 mm

) by means of connector

which is included in delivery. Connec-

tion diagram and inner view of the con-

nector as shown in Fig. 15 and 16.

Comments:

BK – black

BN – brown

BU – blue

NC – not connected

Make the electric connection in voltage-free state!

With regard to possible occurrence of electrostatic charge on non-conductive parts of the

level meter, metallic flanges of the ULM–53Xi–10 and 20 (for explosive areas) level meters

must be grounded with ground terminal!

In case of strong electromagnetic interferences (EMI), parallel cable ducting with power lines, or

when cable length exceeds 30 m we recommended to use shielded cable.

Horn adapter ST

Fig. 15: Level meter connection diagram ("I" version) and

the inside of the connector socket

Fig. 16: Level meter connection diagram ("U" version) and

the inside of the connector socket

Fig. 14: Horn adapter installation

0 V (BU)

ULM–53

+U (BN)

Uout (BK)

+U (BN)