3300/26-XX-XX-XX-01-00-01-00 86798-01 Accelerometer Monitor

Bently Nevada 3300/26-XX-XX-XX-01-00-01-00 (86798-01) Dual Accelerometer RMS Monitor

• Manufacturer & Model: Bently Nevada 3300/26-XX-XX-XX-01-00-01-00 (86798-01) dual accelerometer RMS monitor for seismic vibration measurement.
• Product Type: Dual channel RMS monitor for absolute machine housing or structural vibration.
• Measurement Reference: Relative to free space (seismic measurement).
• Made in: U.S.A.
• Number of Channels: Two independent accelerometer input channels.
• Measurement Type: RMS (Root Mean Square) velocity or acceleration.
• Application: Machine housing vibration and structural monitoring.

Input Specifications

• Sensor Type: ICP or IEPE accelerometer compatible.
• Number of Inputs: 2 channels, differential or single-ended.
• Input Impedance: 100 kΩ minimum per channel.
• Sensor Power: 4 mA constant current source at 24 Vdc.
• Input Range: 0 to 5 g RMS or 0 to 50 mm/s RMS selectable.
• Frequency Response: 2 Hz to 1 kHz ±5% (standard seismic band).
• Low Frequency Cutoff: 1 Hz or 2 Hz selectable via jumpers.
• High Frequency Cutoff: 1 kHz or 2 kHz selectable via jumpers.

Output Specifications

• Analog Output: 4 to 20 mA proportional to RMS amplitude.
• Output Load: 600 ohms maximum for current loop.
• Voltage Output Option: 0 to 10 Vdc for local monitoring.
• Alert Output: One common alert relay per channel.
• Danger Output: One common danger relay per channel.
• Relay Rating: 250 Vac, 5 A resistive load.
• Buffered Output: Raw accelerometer signal for diagnostic use.

RMS Measurement Specifications

• RMS Integration Time: 1 second time constant standard.
• Measurement Accuracy: ±5% of reading from 10% to 100% of range.
• Amplitude Linearity: ±2% of full scale.
• Resolution: 0.01 g RMS or 0.1 mm/s RMS.
• Crest Factor Handling: Up to 5 without clipping.
• Detector Type: True RMS converter.
• Alarm Setting Range: 5% to 100% of full scale.

Environmental Specifications

• Operating Temperature: -20°C to 65°C (-4°F to 149°F).
• Storage Temperature: -40°C to 85°C (-40°F to 185°F).
• Humidity: 95% non-condensing.
• Vibration Tolerance: 2g at 10 Hz to 500 Hz.
• Shock Tolerance: 15g peak, 11 ms half-sine.
• EMC Compliance: EN 61000-6-2 and EN 61000-6-4.

Physical Specifications

• Module Type: 3300 series full-height module.
• Rack Space: Occupies 1 full-height slot in 3300 rack.
• Dimensions: 241 mm x 24 mm x 241 mm (9.5 in x 0.96 in x 9.5 in).
• Weight: Approximately 0.8 kg (1.76 lb).
• Connectors: Rear mounted screw terminals for field wiring.
• Front Panel: LED indicators for OK, Alert, and Danger per channel.

Power Requirements

• Supply Voltage: 24 Vdc nominal (18 to 32 Vdc range).
• Power Consumption: 6 watts typical, 10 watts maximum.
• Inrush Current: 1.5 A at 24 V for less than 500 µs.
• Power Supply Isolation: 500 Vdc from inputs and outputs.

System Compatibility

• Compatible Rack: 3300 Series monitoring rack.
• Compatible Accelerometers: Bently Nevada 330400 series seismic accelerometers.
• Compatible Cables: 3300 series coaxial or twisted pair cables.
• Configuration Software: 3300 Rack Configuration Software.
• Communications: 3300 series proprietary backplane communication.

Package Contents and Shipping Information

• Included Components: Monitor module, rear terminal block, and configuration jumpers.
• Documentation: Installation manual and configuration guide.
• Certification: Factory calibration certificate included.
• Shipping Weight: Approximately 1.0 kg (2.2 lb).
• Packaging: Anti-static bag in protective cardboard box.
• Express Shipping Options: FedEx, UPS, or DHL worldwide.

Frequently Asked Questions

• Q: What does the 3300/26-XX-XX-XX-01-00-01-00 (86798-01) monitor measure?
  A: This monitor measures absolute machine housing or structural vibration relative to free space. It uses seismic accelerometers for true housing vibration monitoring.
• Q: What type of accelerometer works with this monitor?
  A: The monitor accepts ICP or IEPE accelerometers. Bently Nevada 330400 series seismic accelerometers are the recommended sensors for this application.
• Q: What frequency range does the 3300/26 seismic monitor cover?
  A: The standard frequency response is 2 Hz to 1 kHz. You can select 1 Hz low cutoff or 2 kHz high cutoff using internal jumpers.
• Q: What output signals does the 3300/26-XX-XX-XX-01-00-01-00 provide?
  A: The monitor provides 4 to 20 mA analog outputs proportional to RMS amplitude. Alert and danger relays activate when vibration exceeds setpoints.
• Q: How many channels does this monitor have?
  A: The 3300/26 provides two independent accelerometer input channels. Each channel has its own alarm setpoints and outputs.