Product Beschreibung
The Bently Nevada 990-04-70-01-05 is a compact, two-wire vibration transmitter tailored for OEM applications such as centrifugal air compressors, small pumps, motors, and fans. It integrates seamlessly with the 3300 NSv proximity probe and conditions the signal into a 4–20 mA industry-standard output proportional to peak-to-peak vibration.
Technical Specifications
| Parameter | Specification |
|---|---|
| Input | 3300 NSv Proximity Probe & Extension Cable |
| Power Supply | +12 Vdc to +35 Vdc |
| Signal Output | 4–20 mA loop-powered |
| Loop Accuracy | ±1.5% full scale |
| Frequency Response | 5 Hz to 6,000 Hz |
| Probe Gap Range | 0.5 – 1.75 mm |
| Max Loop Resistance | 1,000 Ω @ 35 Vdc |
| Current Limit | 23 mA typical |
| Output Impedance | 10 kΩ (for 10 MΩ load) |
| Operating Temp (Transmitter) | -35°C to +85°C |
| Storage Temp (Transmitter) | -52°C to +100°C |
| Relative Humidity | 100% condensing (non-submerged) |
| Dimensions | 100.1 x 73.9 x 53.3 mm |
| Gewicht | 0.43 kg |
Applications
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Centrifugal air compressors
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Small industrial pumps and motors
-
HVAC and fan systems
-
OEM machinery protection systems
-
Environments with high humidity and limited space
Product Advantages
-
Compact, DIN-rail or bulkhead mountable
-
Fully integrated Proximitor sensor—no external device required
-
Real-time 4–20 mA output for process control systems
-
Built-in diagnostics: “Not OK/Signal Defeat” logic prevents false alarms
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Optional dynamic signal output for external diagnostics
-
Potted housing resists 100% humidity environments
Häufig gestellte Fragen (FAQ)
Q1: What type von sensor is compatible with the 990 transmitter?
A1: It works with the 3300 NSv proximity probe and extension cable.
Q2: What output signal does it provide?
A2: A 4 to 20 mA current signal proportional to peak-to-peak vibration.
Q3: Can the transmitter operate in hazardous areas?
A3: Yes, with ATEX and CSA approvals for Zone 0, Zone 2, and Division 2.
Q4: What mounting options are available?
A4: DIN rail clips, bulkhead screws, or both.
Q5: How does the Not OK condition affect output?
A5: It drives the output below 3.6 mA within 100 µs to signal fault conditions.
Q6: Is the PROX OUT signal isolated?
A6: Nr. Use the 122115-01 Test Adapter for safe diagnostic connections.
Q7: What is the purpose von the Test Input pin?
A7: It allows for verification von the 4–20 mA output with a function generator.
Q8: Can it be used for dynamic vibration analysis?
A8: Limited. It is intended for trending, not full diagnostics.
Q9: What’s the typical frequency range for monitoring?
A9: 5 Hz to 6,000 Hz.
Q10: Does it support real-time gap voltage and vibration monitoring?
A10: Yes, through the PROX OUT port for dynamic diagnostics.
Related or Similar Bently Nevada Modells
| Modell Number | Beschreibung | Dimensions (mm) | Gewicht (kg) |
|---|---|---|---|
| 990-05-50-01-01 | Vibration Transmitter, 5m, DIN mount | 100.1 x 73.9 x 53.3 | 0.43 |
| 990-08-70-02-05 | 0–8 mils range, 7m, bulkhead mount | 100.1 x 73.9 x 53.3 | 0.43 |
| 990-10-50-03-01 | 0–10 mils, 5m, DIN & screw mount | 100.1 x 73.9 x 53.3 | 0.43 |
| 991-04-70-01-05 | Dual Channel Transmitter, 4 mils | 100.1 x 73.9 x 53.3 | 0.46 |
| 3300 NSv Probe | Proximity Probe, 1/4-28 UNF thread | Varies by config | ~0.12 |
| 122115-01 | PROX OUT Test Adapter for diagnostics | Compact portable | ~0.25 |
Popular Bently Nevada Modells
| Modell Number | Beschreibung | Dimensions (mm) | Gewicht (kg) |
|---|---|---|---|
| 3500/42M | Proximitor/Seismic Monitor Module | 241 x 24 x 241 | ~0.35 |
| 3500/22M | Transient Data Interface Module | 241 x 24 x 241 | ~0.35 |
| 3500/60 | Temperature Monitor | 241 x 24 x 241 | ~0.35 |
| 3500/92 | Communication Gateway | 241 x 24 x 241 | ~0.35 |
| 330103-00-05-10-02-00 | 3300 XL 8mm Proximity Probe | Length varies | ~0.15 |
| 330180-91-CN | 3300 XL Proximitor Sensor | 71 x 61 x 27 | ~0.25 |
Unternehmensinformationen
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Add: Alishan Building, 2 Lvling Rd, Bezirk Siming, Xiamen, Fujian, China, 361006
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