991-05-70-01-01 Bently Nevada | 991 Thrust Transmitter

Overview:

The Bently Nevada 991-05-70-01-01 Thrust Transmitter is designed for monitoring and measuring shaft movement in machinery. It offers high precision with a wide range of options, making it suitable for critical industrial applications requiring reliable performance.

Key Features:

• Full-Scale Range: 0.5 mm
• Linear Range: 0.25 to 1.65 mm (10 to 65 mils)
• Output: 4-20 mA in a 2-wire configuration
• Power Requirements: 12-35 Vdc input at the transmitter terminal
• Accuracy: ±1.5% over full-scale range (typical)
• Temperature Stability: ±10% of 7.87 mV/µm (200 mV/mil) from 0°C to 70°C (32°F to 158°F)
• Prox Out Incremental Scale: 7.87 mV/µm (200 mV/mil) ± 6.5% typical
• Maximum Loop Resistance: 1,000 Ω including cable at 35 Vdc
• Agency Approval: CSA Division 2 for hazardous areas

Technical Specifications:

• Brand: Bently Nevada
• Model: 991-05-70-01-01
• Mounting Option: 35 mm DIN-rail clips
• System Length Option: 7.0 meters (23 feet)
• Input: Accepts one non-contacting 3300 NSv Proximity Probe and extension cable
• Output Impedance: 10 kΩ calibrated for a 10 MΩ load
• Transducer Tip Material: Polyphenylene sulfide (PPS)
• Transducer Case Material: AISI 303 or 304 Stainless Steel (SST)
• Cable Type: 75Ω coaxial, FEP insulated
• Hazardous Area Locations: Non-Hazardous Zone 2 or Div 2 with up to 13 km (8 miles) signal output distance
• Tensile Strength: 222 N (50 lbf) maximum for probe case to lead
• Transmitter Weight: 0.43 kg (0.9 lb)
• Probe Cable Armor (Optional): Flexible AISI 302 SST with optional FEP outer jacket
• Minimum Target Size: 9.5 mm (0.375 in) diameter
• Leadwire Length: Maximum of 3 meters (10 feet)

FAQs:

1. What is the maximum loop resistance?
   • The maximum loop resistance is 1,000 Ω at 35 Vdc, including the cable.
2. What type of proximity probe is compatible with this transmitter?
   • The transmitter is compatible with a 3300 NSv proximity probe and extension cable.
3. Is this product suitable for hazardous environments?
   • Yes, it is CSA Division 2 certified for use in hazardous locations.
4. What is the accuracy of the transmitter?
   • The accuracy is within ±1.5% over the specified full-scale range.
5. Can I use this transmitter with portable test equipment?
   • Yes, it is compatible with ungrounded portable test equipment. For grounded, AC-powered test equipment, the 122115-01 Test Adapter is required.

For more detailed information:991 Thrust Transmitter Datasheet