BERTHOLD TECHNOLOGIES LB 567, Руководство пользователя

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Chapter 4. Getting Started
52 MicroPolar 2 (++) LB 567
4.3.5 Synchronization
If a weight/throughput signal for load compensation will be used
and if the weighing system is more than 5 m away from the mi-
crowave measuring path, then - depending on the belt speed, the
weight/throughput signal has to be synchronized with the micro-
wave information so that both signals measure the same product.
Min. distance The minimum distance is: 5 x v Eq. 4-2
where:
v = belt speed [m/s]
Max. distance The permissible maximum distance of both measuring devices
depends on the belt speed and is calculated as follows:
Belt speed [m/s] Maximum distance [m]
< 1 50
> 1 100
Figure 4-16:
Synchronized
belt weigher signal
1
The weighing
system can be set
up before or after
the microwave
measuring path.
Belt speed The belt speed should not exceed 5 m/s when the synchronization
is used.
Varying conveyor belt speed
A varying belt speed has to be taken into account for the syn-
chronization. The speed signal has to be fed into the evaluation
unit as 0/4…20 mA via current input 2.