설명
SENSiQ® Weighdisc WD 15 t … 200 t
Application
Ladle turret scale
Ladle transfer car
Scrap basket, roller and tundish scales
Rail weighbridges
Silo, container and furnace scales
Construction
Very low installation height and installation space
Two contact surfaces for a direct bolted joint
Robust measuring element without membrane
Function
Simple and cost-effective installation through direct bolted joints between the upper and lower connecting structure without moving parts
High functional safety and availability, even with impact loads and constraining forces
Minimum measuring value interference despite the transmission of large interference forces and moments
For maintenance-free scales operated under harsh conditions
High overload capability
High reproducibility
High long-term stability
Connection dimensions and electrical data are compatible with the earlier design of WDI / WDI-K according to data sheet BV-D2206 / BV-D2220
The plug connection differs from earlier designs of the WDI / WDI-K but is identical to the plug connection of the SENSiQ Weighbeam WB type series.
Operating Principle
WD 15 t … 200 t
Technical Data
| WD 15 t | WD 25 t | WD 50 t | WD 100 t | WD 200 t | Ref | ||||||
| Accuracy class1) | D 0,1 | ||||||||||
| Nominal load | Emax | 15 t | 25 t | 50 t | 100 t | 200 t | |||||
| Limit load (with Lq = 0.15 x LI) Limit load = max. safe load |
LI |
75 t | 75 t | 150 t | 300 t | 600 t | |||||
| Breaking load (with Lq = 0.15 x Ld) | Ld | 125 t | 125 t | 250 t | 500 t | 1000 t | |||||
| Max. permitted lateral load | Lq, max | 12 t | 12 t | 25 t | 50 t | 100 t | |||||
| Nominal characteristic value | Cn | 0.54 ± 0,002 mV / V | 0,9 ± 0,002 mV / V | Emax | |||||||
| Compound error | Fcomb | 0,07 % | Cn | ||||||||
| Creepage under load (30 min) | Fcr | 0,05 % | Cn | ||||||||
| max. admissible no. of legal-for-trade scale intervals1) |
nLC |
1000 | |||||||||
| Smallest scale interval1) | Vmin | Emax / 1000 | |||||||||
| Input resistance | Re | 694 Ω +8 Ω | Tr | ||||||||
| Output resistance | Ra | 700 Ω +4 Ω | Tr | ||||||||
| Ref- supply voltage | Usref | 10 V | |||||||||
| Max. supply voltage | Usmax | 36 V | |||||||||
| Nominal temperature | Btn | -10 °C bis +100 °C | |||||||||
| Operating temperature
(and storage temperature range) |
Btu |
-40 °C bis +180 °C | |||||||||
| Temperature | Tr | +22 °C | |||||||||
| Storage temperature range | Bts | -50 °C to +180 °C | |||||||||
| Temperature coefficient of the zero signal | TKo | +0.07 % / 10 K *) | Cn in Btu | ||||||||
| Temperature coefficient of the
characteristic value |
TKc | +0.15 % / 10 K *) | |||||||||
| Self-weight | me | 10 kg | 10 kg | 10 kg | 20 kg | 47 kg | |||||
| Surface | galvanized | ||||||||||
| Protection class | IP68 | ||||||||||
|
Cable specification |
The Weighdisc has a 200 mm connection cable with plug-pin connections.
A separate, shielded cable (Ø 8.5 mm x 15 m) with socket and free cable end for the connection to the summation box is also supplied.
The following applies to the cable: Silicon cable, bend radius: > 40 mm; temperature range: -50 °C …+180 °C |
||||||||||
|
Cable connection allocation |
black: input + / blue: input – red: output + / white: output – yellow: sense + / green: sense –
purple: temperature sensor / brown: temperature sensor black/yellow: shielding
(Not connected sense line – lines have to be insulated) |
||||||||||
1) For information only
2) In isothermic state
Dimensions
WD 15 t … 200 t
Dimensions [mm]
|
Model |
A |
B |
C |
D |
E |
G |
H |
I |
K |
L* |
M |
N |
O |
| WD 15 t / 25 t | 192 | 136 | 70 | 65 | 28 | 16 | 168 | 115 | 16.5 | M16 | 26 | 20 | 16.5 |
| WD 50 t | 192 | 136 | 70 | 65 | 28 | 16 | 168 | 115 | 16.5 | M16 | 26 | 24 | 16.5 |
| WD 100 t | 265 | 195 | 100 | 88 | 36 | 23 | 234 | 164 | 22 | M20 | 32 | 32 | 21 |
| WD 200 t | 350 | 263 | 140 | 120 | 54 | 25 | 310 | 220 | 26 | M24 | 38 | 53.5 | 25 |
* Metric thread
Requirements of the Quality of both Contact Surfaces
WD 15 t … 200 t
- Material selection “A”:
As a rule, construction steel is used of at least S235 grade
- Operating thickness “B”:
This depends on the stiffness of the overall construction. The operating thickness of the contact surfaces must be large enough such that the deflection under the rated load is less than 0.05 mm
- Surface quality “C”:
The average peak-to-valley height required of the contact surfaces is 6.3 μm
- Flatness “D”:
The maximum permissible flatness tolerance of each contact surface is 0.03 mm
- Plane parallelism “F”:
The upper and lower contact surfaces to the Weighdisc must be plan parallel to each other within at least 0.1 mm]
Installation note:
If the WD is mounted on an interim plate, the entire unit can be removed more easily. Otherwise, the entire load has to be dismantled in order to access the middle fixing screw.
Order Numbers
| Variants | Order Number | |
| Weighdisc with plug connection and 15 m cable | ||
| WD | 15 t | V713566B01 |
| WD | 25 t | V713566B11 |
| WD | 50 t | V713566B21 |
| WD | 100 t | V713566B31 |
| WD | 200 t | V713566B41 |
| Spare part: 15 m connecting cable with plug connection | V090162B01 | |
| Spare part: 15 m connecting cable with old plug connection 1) | V023643B01 | |
| Adapter for the old 15 m connecting cable 2) | V036069B10 | |
| High-temperature cable:
15 m with plug socket
Constant operation of the cable is permitted at –65 °C -300 °C.
Operation is permitted at 700 °C for a period of up to 90 minutes. |
V090162B07 |
|
| Measuring Cable: 30 m | V090162B04 | |
- Only compatible with the old design WDI-K according to data sheet (BV-D2206 / BV-D2220); relevant for cable replacement on
- If the old cable remains on site and the WDI-K is swapped for a
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