Bedienungsanleitung Weightec 348 (Seite 14 von 53) (Englisch)

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Exceeding the zero limits : As soon as a zero setting should exceed the limits, the zero setting is not

executed. In the data string, in digit 12, an error message appears : > or = ,

as well as on the internal display in the last two characters : Z > or Z = .

The previous zero value is maintained and may be requested for with

command : ? Z .

Delete zero memory : Both the zero memories of the zero track en initial zero setting are deleted

by setting both switch 4 and 5 off.

The zero memories are not deleted by switching off the 348.

4.3 ADJUSTING : DEAD LOAD COMPENSATION SWITCH 6 - 16

System : Dead load compensations used for suppressing permanent loads on a

weighing scale. F.e. a weigh hopper, platform, conveyor etc.

Here the dilswitches 6 up to 16 are used as hardware memory. The setting of

these switches is continuously transferred to a digital memory and is

subtracted from the actual A/D conversion value.

At any moment the setting of the switches may be changed, the weight reading

is adapted immediately.

Range : The 11 dilswitches have a total range of 1 mV/V, that is 50 % of the capacity of

2 mV/V loadcells. If this proves to be not enough a higher capacity of loadcells

should be applied.

Accuracy : The first switch at the left: switch 6, has the highest value: 50% of the range,

the next has 25% and so on until switch 16 with 0.05% effect, which is 0.1%

of the weighing capacity. These lasting 0.1% is set zero with switch 5 . See 4.2.

Procedure : Start with all the switches down (off), 4 and 5 included. Set switch 6 “on” and

check the effect on the internal display. If the weight value still is positive leave

the switch “on”. If the value is negative set the switch back “off”.

Proceed with switch 7 a.s.o. until switch 16. Finally switch 5 is set “on”

resulting in an exact zero reading.

Attention

: during this procedure all the span switches 17 t/m 32 should be “on”,

the division selector switches preferably at x 1: switches 53 up to 56 op 1 0 0 1

(on -off - off - on). Not all the overload switches 38 up to 48 should be “off” ,

preferably all “on” .

No interference with : Setting or changing the dead load settings and the digital zero memories

span adjustment does not effect in any way the span adjustment.

4.4 ADJUSTING : SPAN SWITCH 17 - 32

Weight adjustment : Using switch 17 up to 32 the scale may be adjusted, based upon an accurate

weight mass placed upon the scale, preferably 100% of the weighing capacity.

These switches determine the number of scale divisions that are applied on the

selected input sensitivity range. See 4.1

F.e. at an selected input range of 1 mV/V, the input signal of 1 mV/V is

divided into 15,000 divisions if all the switches are “on”. Setting back the

switches one by one will reduce this number, finally to 0 divisions.

At any moment the setting of the switches may be changed, the weight reading

is adapted immediately.

Manual 348-2 V 3.1 Page 14 01-06-2007

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Weightec 348 Seite 14

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