ДПЭ22Ex, Piezoelectric sensor
Description
Piezoelectric sensor designed for measuring instantaneous vibration velocity in the range from 0 to 100 mm/s at temperatures from –40 to +180 °C in explosion-proof execution 1ExibIIBT3 GbX.
The output signal is proportional to the instantaneous vibration velocity value; interface 1–5 mA AC.
Used in vibration monitoring channels of supports together with the controllers of the "Vibrobit 300" and "Vibrobit 500" systems.
Key features:
- Explosion protection marking — 1Ex ib IIB T3 Gb X
- Type of explosion protection — intrinsically safe electrical circuit "i"
- Requirement to be connected into intrinsically safe electrical circuits
- Installation in special metal converter boxes
Specifications
| Measurement principle | piezoelectric |
| Measured parameter | vibration velocity (instantaneous value) |
| Compatibility with transducers | - |
| Measurement ranges | 0 – 12; 0 – 15; 0 – 30; 0 – 50; 0 – 100 mm/s |
| Frequency range | 10 – 1000 Hz |
| Explosion protection | Yes |
| explosion protection type | intrinsically safe electrical circuit "i" |
| Explosion protection marking | 1Ex ib IIB T3 Gb X |
| Special explosion protection requirements | Connection via intrinsically safe barriers Installation in an explosion-proof converter box |
| Registry number | 50585-12 |
| Limits of permissible basic measurement error, % | ±2,5 (relative accuracy) |
| Calibration interval, years | 2 |
| Output type | 1 – 5 mA AC |
| Connection diagram (number of lines) | 4-wire |
| Load resistance, Ohm (max) | 2000 |
| Power supply voltage range, V | + (18 – 25.2) |
| Current consumption, (max) mA | 45 |
| Operating temperature range, °С | from −40 to +180 (piezoelectric vibroconverter) from −40 to +70 (external amplifaer) |
| Housing index of protection according to GOST 14254 | IP67 (piezoelectric vibroconverter) IP32 (external amplifaer) |
| Resistance to external influencing factors GOST 30631–99 | M5 |
| Transducers connection type | - |
| Overall dimensions, mm | 30*30*50 (piezoelectric vibroconverter) 101*62*30 (external amplifaer) |
| Service life, years (min.) | 10 |
| Warranty period, months | 24 |
| MTBF, hours | 150 000 |
Applications
Measurement of the absolute vibration velocity of steam, gas and hydraulic turbine units, turbocompressors, centrifugal pumps and other machines during their operation.
The sensor can be used both independently and as part of the measurement channels of the plant's SCADA systems.
The sensor can be used both independently and as part of the measurement channels of the plant's SCADA systems.
Dimensions and connection diagram
