AFLOWT LV Series, Руководство по установке

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11
D
max
= 1.2
⋅
B (3)
The following conditions must be met:
B
– H
max
≥ 1.4 m – for AS-40x-xx0, AS-50x-xx0 acoustic systems
B
– H
max
≥ 0.8 m – for AS-1xx-xx3, AS-6xx-xx0, and AS-7xx-xx0
acoustic systems.
D
min
and D
max
calculation formulae contain 1.2 factor, which is
included to widen the range of signal search and prevent loss of signal
on powering up the Device after a standstill period (dead time). The loss
of signal may result from the situation, when characteristics of gas
medium have significantly changed during the standstill period, and no
ultrasound velocity correction has been performed.
Base plane
of readout
D
B
H
D
R
D
m
in
D
m
a
x
Installation
flange AS
Media interface
B
– measurement base level; D
min
, D
max
– minimal and maximal distances
respectively; H
– level of liquid; DR – distance to the reference reflector.
Fig. 1. Configuration settings
5.2. Configuring the Level gauge installed on the object
under control
5.2.1. Configuration procedure is performed after determining all initial settings
and completing all mount procedures. The Level gauge is configured
from the keyboard, which is operated as described in "ULTRASONIC
LEVEL GAUGE AFLOWT LV. LV-2xx version. The operation manual,