Flintec II PC-BASED - Manual (Page 10)

FlintWeigh Technical Manual, Rev. 3.03 November 2011 Page 10 of 32
4.5. Operation of Standard Load Cells
The scale interface can be connected with up to two LDU amplifiers. Depending on the application – legal for
trade scale or industrial application – it can be selected among various weighing modules.
Weighing module type LDU 68.1 LDU 69.1 LDU 78.1 LDU 68.2
Accuracy class Not approved
Certificate no.
DK0199-R76-
10.04 Rev.1
DK0199-R76-
11.08 Rev.1
DK0199-R76-
10.08 Rev. 1
Intervals "n" acc. Kompmodeng: n
ind
10.000 10.000 10.000
Internal resolution ± 130 000 > ± 1 000 000 ± 260 000 ± 130 000
Approved single range scale yes yes yes no
Approved multi range scale no yes yes no
Approved multi interval scale no yes yes no
Load cell excitation U
EXC
5 V DC 5 V AC 5 V DC 5 V DC
Minimum input voltage U
MIN
0 V 0 V 0 V 0 V
Approved min. input per vsi ∆ U
min
1.0 µ V 0.1 µ V 0.3 µ V
Input sensitivity 0.05 µ V/d 0.02 µ V/d 0.05 µ V/d 0.1 µ V/d
Min. load cell impedance R
Lmin
87.5 Ω 87 Ω 87.5 Ω 87.5 Ω
Max. load cell impedance R
Lmax
1150 Ω 1200 Ω 1150 Ω 1150 Ω
Min. operation temperature T
min
-15 °C -15 °C -15 °C -15 °C
Max. operation temperature T
max
+55 °C +55 °C +55°C +55 °C
Fractional error limit P
ind
0.5 0.5 0.5
Load cell connection 4-/6- wire technique 4/6 4/6 4/6 4/6
Tab. 4.3: Technical characteristics of LDU amplifiers
The connection of the standard load cells has to be done as described in the manual of the KAL-4 digital
junction box (see Flintec-CD, technical documents, manuals).
4.6. Sealing Details with Sticker
The legal for trade operation requires a sealing of the junction boxes. The following figure shows a possible
positioning of the sticker for KAL-4
Fig. 4.6: Sealing details with sticker