Product Introduction
176449-04 3500/45 is a four-channel position monitor produced by Bently Nevada. Designed for industrial control systems, this position monitor provides unparalleled reliability and accuracy and is suitable for monitoring the position of critical components of rotating machinery, such as axial displacement or differential expansion.
Technical Specifications
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Manufacture |
BENTLY NEVADA |
|
Model |
3500/45 |
|
Part Number |
176449-04 |
|
Description |
Position Monitor |
|
Origin |
USA |
|
Dimension |
26*26*5cm |
|
Weight |
0.84kg |
Product Details
3500/45 Position Monitor, equipped with four channels, is designed to receive signals from a variety of sensors including proximity transducers, Rotary Position Transducers (RPTs), DC Linear Variable Differential Transformers (DC LVDTs), AC Linear Variable Differential Transformers (AC LVDTs), and rotary potentiometers. It processes these inputs and then compares the processed signals against alarms that are programmable by the user.
Utilizing the 3500 Rack Configuration Software, you have the capability to configure each channel to carry out the following tasks:
- Axial (thrust) Position
- Differential Expansion
- Standard Single Ramp Differential Expansion
- Non-standard Single Ramp Differential Expansion
- Dual Ramp Differential Expansion
- Complementary Differential Expansion
- Case Expansion
- Valve Position
The primary purpose of the 3500/45Position Monitoris to provide the following:
- Machinery protection by continuously comparing monitored parameters against configured alarm setpoints to drive alarms
- Essential machine information for operations and maintenance personnel
Depending on the specific setup, each channel generally processes its input signal to produce different parameters known as measured variables. For each measured variable that is active, you can set alert thresholds, and for any pair of active measured variables, you can set danger thresholds.
Specifications
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Signal
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Accepts from 1 to 4 signal inputs
|
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Power consumption
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7.7 Watts, typical, using Position I/O or
8.5 Watts typical, using AC LVDT I/O or
5.6 Watts typical, using Rotary Potentiometer I/O
|
|
Input Impedance
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1 MΩ (DC LVDT inputs)
10 kΩ (Proximitor or RPT inputs)
137 kΩ (AC LVDT inputs)
200 kΩ (Rotary Potentiometer inputs)
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Sensitivity
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Thrust
|
3.94 mV/μm (100 mV/mil) or
7.87 mV/μm (200 mV/mil)
|
|
Differential Expansion
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0.394 mV/μm (10 mV/mil) or
0.787 mV/μm (20 mV/mil)
|
|
Ramp Differential Expansion
|
0.394 V/mm (10 mV/mil),
0.787 V/mm (20 mV/mil),
3.937 V/mm (100 mV/mil), or
7.874 V/mm (200 mV/mil)
|
|
Complementary Input Differential Expansion
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0.394 V/mm (10 mV/mil),
0.787 V/mm (20 mV/mil), or
3.937 V/mm (100 mV/mil)
|
|
DC LVDT Case Expansion
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0.05 V/mm (1.25 V/in),
0.08 V/mm (1.90 V/in),
0.10 V/mm (2.50 V/in),
0.18 V/mm (4.50 V/in),
0.20 V/mm (5.00 V/in), or
0.22 V/mm (5.70 V/in)
|
|
AC LVDT Case Expansion
|
28.74 mV/V/mm
(0.73 mV/V/mil),
15.35 mV/V/mm
(0.39 mV/V/mil), or
9.45 mV/V/mm
(0.24 mV/V/mil)
|
|
AC LVDT Valve Position
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28.74 mV/V/mm
(0.73 mV/V/mil)
15.35 mV/V/mm
(0.39 mV/V/mil),
9.45 mV/V/mm
(0.24 mV/V/mil),
10.24 mV/V/mm
(0.26 mV/V/mil),
7.48 mV/V/mm
(0.19 mV/V/mil),
5.51 mV/V/mm
(0.14 mV/V/mil),
3.94 mV/V/mm
(0.10 mV/V/mil), or
3.15 mV/V/mm
(0.08 mV/V/mil)
|
|
Rotary Potentiometer Valve Position
|
41 mV/degree rotation
|
|
Rotary Position Transducer (RPT)
Valve Position
|
140 mV/deg rotation,
70 mV/deg rotation, or
50 mV/deg rotation
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Outputs
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Front Panel LEDs
|
|
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OK LED
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Indicates when the 3500/45Position Monitoris operating properly.
|
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TX/RX LED
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Indicates when the 3500/45Position Monitoris communicating with other modules in the 3500 rack.
|
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Bypass LED
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Indicates when the 3500/45Position Monitoris in Bypass Mode.
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Transducer Power Supply
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Proximitor or RPT
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-24 Vdc
|
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DC LVDT
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+15 Vdc
|
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AC LVDT
|
2.3Vrms 3400Hz sine wave
|
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Rotary Potentiometer
|
-12.38 Vdc
|
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Recorder
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+4 to +20 mA
Values are proportional to monitor full-scale.
The monitor provides individual recorder values for each channel except Ramp and CIDE.
Monitor operation is unaffected by short circuits on recorder outputs.
|
|
Voltage Compliance
(current output)
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0 to +12 Vdc range across load
Load resistance is 0 to 600 Ω.
|
|
Resolution
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0.3662 µA per bit ±0.25% error at room temperature
±0.7% error over temperature range
Update rate 100 ms or less
|
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