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      3300/20-12-01-01-00-00

      Dual Thrust Monitor
      In Stock
      Ships by Saturday, November 7
      Fast Shipping Available
      Product image is representative; revision or series may vary. Contact us to request a specific version.

      Product Describe：

      Bently Nevada 3300/20-12-01-01-00-00 is a dual thrust-position monitor with a ±1.0 mm metric scale and epoxy-sealed alarm relays. Two 200 mV/mil proximity channels track shaft axial position relative to the machine clearance.

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      Technical specifications for 3300/20-12-01-01-00-00

      • Manufacturer:
        Bently Nevada
      • Product Category:
        Machinery Monitoring Systems
      • Spare Part Number:
        3300/20-12-01-01-00-00
      • Estimated shipping dimensions:
        5.1×32×20.4cm
      • Weight:
        0.98 kg
      • Tariff Code:
        8537101190
      • Counliy of origin:
        USA
      • Measurement channels:
        2 independent axial-position channels
      • Position scale:
        1.0-0-1.0 mm
      • Selected transducer sensitivity:
        200 mV/mil (approximately 8 V/mm)
      • Signal input impedance:
        10 kΩ
      • Nominal consumption:
        1.5 W
      • Signal-conditioning accuracy at +25 °C:
        ±0.33% full-scale typical; ±1% maximum
      • Recorder output selections:
        4–20 mA; 1–5 V DC; 0 to -10 V DC
      • Current recorder load:
        0–600 Ω
      • Voltage recorder minimum load:
        10 kΩ
      • Buffered output impedance:
        100 Ω
      • Alarm setpoint adjustment:
        0–100% full-scale; normal and counter directions
      • Alarm repeatability:
        Within 0.39% full-scale
      • Alarm delay selections:
        0.1, 1, 3 or 6 s
      • Relay construction:
        Epoxy sealed
      • Safety barrier configuration:
        None
      • Operating temperature:
        0 to +65 °C
      View as PDF Ask for Quote

      Information

      Overview Manuals Common Applications Product Precautions
      Bently Nevada 3300/20-12-01-01-00-00 presents each probe measurement on a bidirectional metric scale, with channel-specific direction selection so that physical shaft travel agrees with the displayed normal and counter directions.
      • Uses a 1.0-0-1.0 mm axial-position scale.
      • Accepts one or two proximity signal inputs with 10 kΩ input impedance.
      • Offers current and voltage recorder-output modes.
      • Supports separate normal-thrust direction programming for each channel.

      The probe arrangement must represent the thrust collar relative to bearing clearance. Check the sign of each channel with controlled axial movement before setting protection thresholds; two stable readings can still be configured with the wrong direction.

      Important Notice: Probe adjustment and available gap range must permit alarm actuation throughout the required axial travel. An incorrectly positioned probe can prevent effective protection even when the monitor powers up normally.

      Bently Nevada 3300/20-12-01-01-00-00 Manuals & Downloads
      Bently Nevada 3300/20-12-01-01-00-00 Official Technical Reference Excerpt (PDF)Bently Nevada 3300/20-12-01-01-00-00 Installation & Commissioning Guide (PDF)

      The technical excerpt covers monitor characteristics and configuration choices. The installation guide addresses two-probe alignment, field connections, direction checks and alarm acceptance.

      Thrust collar position
      Measure axial displacement of the collar relative to bearing clearance.
      Dual-channel thrust protection
      Compare two probes observing the same collar or shaft.
      Bidirectional axial travel
      Apply normal and counter-thrust thresholds to the selected position scale.
      Remote position recording
      Send individually scaled channel outputs to a compatible receiver.
      Check both axial-position channels and their alarm paths before returning Bently Nevada 3300/20-12-01-01-00-00 to service.
      1
      Identify both probes and the thrust collar they observe.
      2
      Record the current gap and normal-direction setting for each channel.
      3
      Check the 1.0-0-1.0 mm scale against the machine travel requirement.
      4
      Verify the 200 mV/mil input sensitivity and transducer supply.
      5
      Retain the selected epoxy sealed relay arrangement.
      6
      Confirm the intended unbarriered signal interface before reconnecting field wiring.
      7
      Test normal and counter Alert and Danger thresholds under the maintenance procedure.
      8
      Restore voting, reset, delay and bypass settings before returning protection to service.

      Technical notes

      Separate monitor accuracy, recorder-output accuracy, LCD resolution and alarm repeatability when assessing the complete measurement. The recorder-output error is additional to the signal-conditioning error.

      FAQ View All FAQ

      • How is normal thrust direction assigned independently on 3300/20-12-01-01-00-00?
        Each channel can be programmed for normal movement toward or away from its probe. Verify the indicated direction against a controlled physical movement of the target.
      • What input impedance does 3300/20-12-01-01-00-00 present to its proximity signal sources?
        The signal input impedance is 10 kΩ. Use the intended Proximitor output and preserve the supply, common and signal connections for each channel.
      • Which transducer sensitivity matches the selected input in 3300/20-12-01-01-00-00?
        The selected 3300 or 7200 Proximitor input uses 200 mV/mil, approximately 8 V/mm. The monitor can support another sensitivity configuration, but it must not be assumed for this selected input.
      • Can 3300/20-12-01-01-00-00 provide a voltage recorder signal instead of 4–20 mA?
        Yes. Recorder outputs can be configured for 4–20 mA, 1–5 V DC or 0 to -10 V DC. Match the receiver input and scaling to the selected mode.
      • What load is required for a voltage recorder output from 3300/20-12-01-01-00-00?
        The minimum receiver load resistance is 10 kΩ. The voltage output impedance is 100 Ω; verify the connected receiver rather than applying the current-loop load rule.
      • How repeatable are the alarm settings in 3300/20-12-01-01-00-00 after adjustment?
        Once set, alarms are repeatable within 0.39% of full-scale. The LCD setting resolution is approximately ±1.6% of full-scale, which is a different specification from repeatability.
      • Where may 3300/20-12-01-01-00-00 be installed within a 3300 rack?
        It occupies one monitor position other than positions 1 and 2, which are reserved for the power supply and system monitor. Confirm the associated rear interface and field wiring for that position.
      • Is a dark OK LED on 3300/20-12-01-01-00-00 enough to identify a failed transducer?
        No. A dark OK LED can indicate a NOT OK condition or a bypassed channel. Check the red Bypass indication and the signal condition before diagnosing the transducer.
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