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Weightec 348 Manual

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SEE PAGE 21 : SWITCHES ON THE MAIN PRINT BOARD
- SEE PAGE 24 : LAY OUT AND CONNECTIONS OF THE MAIN PRINT BOARD
1 - Switch on the 230 VAC (or 24VDC) excitation at connector 31 with calibration switch 49 off (low)
2 - Advised setting of the switches before starting the adjusting procedure:
- Span 17 … 32 ON (high)
- Overload 38 … 48 ON (high)
- Calibration mode 49 ON (high = stronger damping, display back lit on)
- (Auto) zero 4 and 5 OFF (low)
- Dead load 6 … 16 OFF (low)
- Non linearity 33 … 37 OFF (low)
- Damping 50 … 52 OFF (low)
- Legal mode 60 OFF (low)
3 - Select the input sensitivity with switch 1 ../ 3 in mV/V effective use van de loadcell.
See 4.1 on page 13 en table 1 on page 39.
4 - Select the value of the scale division and the position of the decimal point with switch 53 … 56.
See 4.8 on page 18 en table 3 on page 41.
5 - Compensate the dead load (reading on the internal display) back to zero, first with switch 6 … 16.
Start with setting switch 6 (MSB) high. If the reading goes negative ( - or < sign in front of the value), set
down this switch again. If the reading stays positive, leave it high. Continue in the same way with all the
next switches one by one. A small weight value will remain.
This value is set to an exact zero by switching switch 5 “on”.
6 - Load the scale with certified weights, preferably up to the Max. weighing capacity.
The reading now will show a too high weight value. Reduce this value with switch 17 … 32 until
the reading gives the correct value. Start with switching down switch 17 (MSB), the procedure is identical
to the dead load compensation procedure.
7 - With full load on the scale now the overload setting has to be selected with switch 38 … 48 until the
display reading changes from G + …. into in G ! …. This G ! … means: there is overload now.
Make the setting of the switches in such a way that G ! … just does not comes up. Start with switching
down switch 38 (MSB), the procedure is identical to the dead load compensation procedure.
8 - Unload 50% of full load from the scale. The display reading should present now exactly half the weight
value of the Max. capacity. If not, this deviation may be linearized with switch 33 … 37. The direction of
this linearity compensation : up or down, is selected with the leftmost switch 33. The other switches
determine the value of the compensation. Start with the rightmost switch 37 (LSB). The value setting of
these switches is binary, see the table in chapter 4.6 on page 16, 17.
Attention! If the overload setting is not done correctly, the linearity compensation will not be correct too !
9 - Select if required: - Auto zero : switch 4 high = zero track “on”
- Baud rate, parity : switch 57, 58, 59 see table 4 on page 42
- Legal mode : switch 60 high = legal mode “on”
- Call number : switch 61 t/m 64 see table 5 op page 43
10 - Set down switch 49. The strong damping for calibration purposes will be switched off.
11 - Increase, if necessary, the damping of the weigh presentation with the filter switches 50 … 52 on an
empiric bases. The value setting of these switches is binary, start with switch 52 (LSB). See chapter 4.7
on page 17 and table 2 on page 40.
Manual 348-2 V 3.1 Page 20 01-06-2007
… 20 …


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