Intelligent Weighing Technology QHD+15, Руководство по обслуживанию

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The scale will be shown the model number in the “ Weight ” display and will be
start self test.
Remote Scale:

The QHD+ Series can be connected to any size of load cell type weighing base
through the Remote scale port on the left side of the scale case. Ensure you have
the correct base for the scale as each is matched for calibration.

Place the remote scale platform in the position where it is to be used. Level the
scale by adjusting the four feet. If fitted with a spirit level then it should be
adjusted such that the bubble is in the center.

Press key to change remote mode and check weighing performance.
Remote Scale Connection
The cable of the load cell goes to a 9 pin DB9 d-subminiature plug connecter with
following connections.
Pin Connection
1 and 2 Exc(5V)
4and 5 Excitation- (0v)
7 Signal-
8
Note: The sense wires connections of a six wire load cell are not used but can be
connected to the respective Excitation pins.
Remote Scale Setup
The remote scale should set for a realistic resolution with respect to the input provided
by the load cell/s.
If a single 2mV/V load cell is fitted and more than 60% of the load cell is used for full
capacity then the high output of >6mV span makes it possible to set a high resolution.
If this criterion is met then the remote scale can be set to a high resolution with a
maximum of 1/30,000, for example: 300kg x 10g.
It will also be possible to sample on the remote scale with the same accuracy as the
Local.
Where more than one load cell is fitted or the total load cell capacity is not utilized then a
reduced resolution should be selected in the remote scale technical set up. For
example, if a system uses four 2mV/V 1000kg load cells for a scale of 1000kg capacity
then the span output at full scale will be only 2.5mV.
In this situation the resolution should be reduced to give a good number of ADC counts
per displayed division, for example, set to 1:5000 or 1000kg x 0.2kg.