Description
DB-DA and DB-DC – Transducers for Ball Bearing Radial Force Measurement
Product Description
Magtrol DB-DA and DB-DC transducers are designed for measuring radial forces in ball bearings. Available in several diameters and temperature ranges, these transducers incorporate strain gauge technology and provide a signal output proportional to the force to being measured.
Features
- Nominal capacity: DB-DA: 50 N, 100 N, 200 N, 350 N and 750 N DB-DC: 1200 N
- Built-in overload protection up to 10× nominal force DB-DA; 2× overload nominal force DB-DC (no mechanical protection)
- Combined error due to nonlinearity and hysteresis: < ± 0.1% (DB-50-DA < ± 0.2%)
- Hermetically sealed; IP 67 protection class
- Three temperature versions available: 60 °C, 100 °C and 160 °C
- Three bearing diameter capabilities: Ø17 mm, Ø20 mm and Ø25 mm
- Rust-resistant metallic construction
- Easy to install
Specifications
| DB-DA-50 | DB-DA-100 | DB-DA-200 | DB-DA-350 | DB-DA-750 | DB-DC-1200 | |
|---|---|---|---|---|---|---|
| MECHANICAL CHARACTERISTICS | ||||||
| Nominal Force | 50 N | 100 N | 200 N | 350 N | 750 N | 1200 N |
| Color of Marking Point | orange | green | white | red | yellow | blue |
| Admissible Overload | 200% | 150% | 200% | |||
| Overload Limit (without zero drift) a) | 2 000% | 1 500% | 1 000% | N/A | ||
| Overload at Rupture | > 2 000% | > 1 500% | > 1000% | 500% | ||
| Maximum Dynamic Load (double amplitude) |
80% | |||||
| Minimum Axial Retention Force of Safety Ring with Safety Pin |
1 000 N | |||||
| Displacement at Nominal Force | ≈ 0.02 mm | ≈ 0.04 mm | ≈ 0.05 mm | ≈ 0.08 mm | ≈ 0.05 mm | |
| Weight | ≈ 0.5 kg | |||||
| ELECTRICAL CHARACTERISTICS | ||||||
| Nominal Sensitivity | 1 mV/V ± 3% | |||||
| Zero Load Signal | < ± 0.3 mV/V | |||||
| Bridge Impedence: Input | 400 Ω | |||||
| Bridge Impedence: Output | 350 Ω | |||||
| Insulation Resistance | > 109 Ω | |||||
| Nominal Supply Voltage | 5 V – 10 V | |||||
| Maximum Supply Voltage | 15 V | |||||
| Combined Error (nonlinearity + hysteresis) |
< ± 0.2% | < ± 0.1% | ||||
| ENVIRONMENTAL CHARACTERISTICS | ||||||
| Reference Temperature, nominal | +23 °C | |||||
| Operating Temperature | 3 options: 0 °C to 60 °C, 100 °C or 160 °C | |||||
| Temperature Influence: on zero | < ± 0.15% / 10 K | < ± 0.1% / 10 K | ||||
| Temperature Influence: on sensitivity b) | < + 0.3% | |||||
| Protection Class | IP 67 | |||||
| CONNECTION CABLE | ||||||
| Cable Length | 0.25 m | |||||
| Cable Diameter | Ø 5 mm | |||||
a) Maximum overload without damage; active mechanical overload protection from approx. 150% to 200% (DB-DA 50/100: 250%)
b) On request: tolerance Δ signal / Δ temperature = < + 0.12% / 10 K
Applications
This transducer is ideally suited for belt, paper or textile tension control and for other measurement of radial forces on rotation cylinders. When connected to a signal conditioner, this transducer is an essential element for highly accurate tension control regulation.
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