Description
ZB Series – Load Cells
Product Description
The load cells of the ZB series have been designed for use under industrial conditions in hybrid type weighing systems up to Class III, for which calibration is obligatory. Made entirely of stainless steel , they are an excellent choice for weighing systems in the foodstuff industry. The sensing element itself is a twin-bend design with metal foil strain gauges. A metal folding bellow welded over this unit forms a hermetically sealed chamber, which when filled with dry nitrogen constantly ensures stable measuring characteristics irrespective of environmental influences. There is a second hermetically sealed chamber containing components for compensation and adjustment, which are required for the exact setting of the guaranteed technical parameters. The load cell is for measuring tensile or pressure forces. The assembly appliances, which will be delivered as a separate order, include an integrated overload protection, thus enabling the user to integrate the load cell in his weighing system without any problem or safety risk. As a standard, the load cells are equipped with a 3 m connection cable. It is a matter of course that these load cells, after calibration in N, can also be supplied as high precision force transducers up to the accuracy class 0.05%. Moreover, the load cells can be supplied an with integrated amplifier (model ZB-E). The output voltages (0 to 10) V or (4 to 20) mA can be selected.
Features
- 10 kg to 1000 kg (100 N to 10 kN)
- Approved for use in calibrated weighing systems (PTB Test Report)
- Hermetically sealed case (IP 67)
- Made of stainless steel
- Appliances for easy assembly
- Compatible with products of well-known manufacturers
- 6-wire configuration
- EU approval
Specifications
| ACCURACY CLASS | 0.1 | 0.05 | C1 | C2 | C3 | |
|---|---|---|---|---|---|---|
| Nominal force (=FN) | kN | 0.1/0.2/0.5/1/2/5/10 | ||||
| Nominal load (=FN) | kg | 10/20/50100/200/500/1000 | ||||
| Max. permissible force/load | %FN | 150 | ||||
| Ultimate overload | %FN | >500 | ||||
| Max. transverse force/load | %FN | 100 | ||||
| Minimum application range | %FN | 18 | ||||
| Reference temperature | °C | +23 | ||||
| Nominal temperature range | °C | -20 to +60 | -10 to +40 | |||
| Operating temperature range | °C | -30 to +70 | ||||
| Storage temperature range | °C | -40 to +70 | ||||
| Enclosure protection (DIN 40050) | IP 67 | |||||
| Nominal sensitivity (=S) | mV/V | 2.000 ±0.002 | ||||
| Zero tolerance band | %S | ≤1 | ||||
| Max. supply voltage | V | 12 | ||||
| Input resistance | Ω | 380 ±30 | ||||
| Output resistance | Ω | 352 ±1.5 | ||||
| Insulation resistance | Ω | >5 × 109 | ||||
| Combined error a) | %S | ≤0.030 | ≤0.023 | ≤0.021 | ||
| Variability b) | %S | ≤0.030 | ≤0.010 | ≤0.010 | ||
| Linearity error b) | %S | ≤0.1 | ≤0.05 | |||
| Width of backlash b) | %S | ≤0.1 | ≤0.05 | |||
| TC of zero per 10 K | %S | ≤0.05 | ≤0.025 | ≤0.025 | ≤0.012 | ≤0.008 |
| TC of sensitivity per 10 K | %S | ≤0.10 | ≤0.05 | ≤0.017 | ≤0.010 | ≤0.008 |
| Zero recovery error (30 min) | %S | ≤0.10 | ≤0.05 | ≤0.050 | ≤0.025 | ≤0.017 |
| Creepage error (30 min) | %S | ≤0.10 | ≤0.05 | ≤0.049 | ≤0.024 | ≤0.024 |
a) According to VDI 2637
b) According to VDI 2638
Option : The transducers can be delivered with an internal amplifier delivering an output signal of 0(4) – 20 mA or 0 – 10 V within precision classes 0.2 and 0.5.
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