TK81 Tunable Filter Vibration Meter Bently Nevada

TK81 Tunable Filter/Vibration Meter by Bently Nevada

The TK81 is a portable handheld instrument for basic vibration measurements on all machinery types. It displays vibration in both unfiltered (overall) and filtered modes, making it ideal for diagnosing problems at specific frequencies.

Key Specifications

• Brand & Model: Bently Nevada TK81 Tunable Filter/Vibration Meter
• Input Signal: Accepts displacement, velocity, or acceleration
• Maximum Input: 10 V peak-to-peak
• Scale Factor: Selectable from 5 to 9999 mV per engineering unit
• Input Impedance: 95 kΩ

Frequency & Filter Performance

• Frequency Response: 1.66 Hz to 1,666 Hz (100 to 100,000 RPM)
• Integration: Single integration available above 10 Hz (600 RPM)
• Filter Operating Range: 1.66 Hz to 1,666 Hz (100 to 100,000 RPM)
• Filter Type: Digital, approximates analog filter with Q of 11

Display & Accuracy

• Display: 4 line by 16 character LCD
• Display Units: Selectable Metric or English, peak-to-peak, zero-to-peak, or rms
• Note: RMS readings may fluctuate below 10 Hz (600 RPM)
• Accuracy: Within 5% for non-filtered signals at full range
• Accuracy: Within 10% for all RMS and filtered measurements

Power & Environmental Limits

• Battery: 9-Volt alkaline (NEDA 1604A)
• Battery Life: 20 hours nominal
• Operating Temperature: +0°C to +40°C (+32°F to +104°F)
• Storage Temperature: -20°C to +70°C (-4°F to +158°F)
• Relative Humidity: To 90% noncondensing

Physical Dimensions

• Height: 191 mm (7.5 in)
• Width: 102 mm (4.0 in)
• Depth: 58 mm (2.3 in)
• Weight: 316 g (0.7 lb)

Package Contents

• 1x Bently Nevada TK81 Tunable Filter/Vibration Meter
• 1x 9-Volt alkaline battery (installed)
• User manual/documentation
• Protective carrying case
• Ships via FedEx, UPS, or DHL

FAQ

• What types of transducers does the TK81 accept?
  It accepts displacement, velocity, and acceleration transducers but does not power them.
• What is the frequency range of this meter?
  1.66 Hz to 1,666 Hz (100 to 100,000 RPM) for both response and filter.
• Does it provide transducer excitation?
  No, you must use self-powered or externally powered transducers.
• What battery does it use?
  Standard 9-Volt alkaline (NEDA 1604A) with approximately 20 hours life.
• Can it measure integrated signals?
  Yes, single integration is available for frequencies above 10 Hz (600 RPM).
• What is the filter type and Q factor?
  Digital filter approximating analog with Q of 11 for targeted diagnostics.
• What are the accuracy specifications?
  Within 5% for non-filtered signals; within 10% for RMS and filtered measurements.
• Is the TK81 portable?
  Yes, it is a lightweight handheld instrument at only 316 g (0.7 lb).