VIBRO-METER RPS6U 200-582-500-013

Core Technical Performance Parameters

Power Input Specifications

• Auxiliary Supply Voltage: 24 V DC industrial standard, operating range 18–30 V DC
• Total Power Consumption: Max 18 W full channel load
• Input-Output Isolation: 3000 V AC reinforced isolation between cabinet power and sensor signal circuits

Sensor Supporting Parameters

1. Eddy Current Probe Channel

• Probe Excitation Frequency: 1.0 MHz ± 50 kHz regulated oscillator
• Probe Supply Voltage: -24 V DC stabilized excitation power
• Measuring Range: 0–2 mm shaft displacement, adjustable gain via front panel trimmer

2. Piezoelectric Vibration Sensor Channel

• Sensor Bias Supply: +24 V DC charge amplifier power
• Signal Gain Adjustable Range: ×1, ×10, ×100 multi-gear switchable gain
• Built-in Band-pass Filter: 0.1 Hz ~ 10 kHz configurable cut-off frequency

Signal Output Specifications

• Main Monitoring Output: ±10 V DC analog vibration signal for DCS/PLC collection
• Fault Alarm Output: Isolated relay contact, 250 V AC / 30 V DC, 5 A resistive load
• Signal Sampling Precision: 0.1% full scale measurement linearity error

Environmental & Mechanical

• Operating Temperature: -20 °C to +60 °C continuous cabinet operation
• Storage Temperature: -30 °C to +80 °C
• Humidity Range: 5%–90% RH non-condensing
• Vibration Resistance: IEC 60068-2-6 industrial heavy machinery vibration standard
• Mounting Standard: 35 mm DIN rail vertical mounting
• Protection Class: IP20 front panel, cabinet installation only
• Net Weight: 0.48 kg

Function & Feature Highlights

1. Dual-mode universal signal conditioning, compatible with both eddy current shaft displacement probes and piezoelectric vibration acceleration sensors, one unit covers two mainstream rotating machinery monitoring technologies
2. Multi-stage adjustable band-pass filter suppresses low-frequency mechanical drift and high-frequency electromagnetic noise, outputs clean vibration waveform signals
3. Independent per-channel fault diagnosis: probe cable breakage, short circuit, sensor power loss automatic detection, triggers relay alarm output and front panel red fault LED
4. Multi-gear switchable signal gain adapts to different vibration amplitude measurement ranges, from tiny micro-vibration of high-speed turbines to heavy low-frequency vibration of large diesel engines
5. Reinforced 3 kV isolation between power circuit and sensor signal circuit, avoids ground loop interference from long-distance sensor wiring
6. Front panel independent trimming potentiometers for zero offset calibration and gain fine adjustment, convenient on-site equipment commissioning without external calibrator
7. Fanless passive cooling design, suitable for long-term unattended operation in power plant and marine engine room monitoring cabinets
8. CE, UL, DNV marine type approval, applicable for land power generation equipment and marine main propulsion engine vibration safety monitoring

Working Principle

1. External 24 V DC auxiliary power enters the unit through EMI filter, converted into isolated stabilized excitation power for different types of vibration sensors.
2. For eddy current probes: Internal 1 MHz high-frequency oscillator emits alternating magnetic field through probe cable; the eddy current induced on rotating shaft surface changes probe coil impedance, the conditioner converts impedance variation into linear ±10 V DC displacement signal after amplification and filtering.
3. For piezoelectric accelerometers: The built-in charge amplifier converts weak piezoelectric charge signals generated by mechanical vibration into standard voltage signals, adjustable gain and band-pass filter process raw vibration signals to remove interference noise.
4. The processed standard vibration analog signal is transmitted to DCS, protection relay or data acquisition system for real-time vibration amplitude monitoring and spectrum analysis.
5. Continuous hardware loop monitoring circuit detects abnormal sensor cable status. If open or short circuit occurs, the internal relay pulls in to output fault alarm signal to trigger machinery protection interlock or central system alarm.

Material & Structural Composition

• Outer Housing: Flame-retardant black PA66 plastic DIN rail housing with integrated anti-vibration reinforcing ribs
• Main PCB: High-temperature FR4 fiberglass circuit board, lead-free tin plating
• High-frequency Signal Components: Precision crystal oscillator, low-noise operational amplifier, multi-stage RC filter network
• Power Isolation Parts: Miniature isolated DC-DC power transformer for sensor excitation power
• Adjustment Components: Sealed multi-turn carbon film trimming potentiometers for zero and gain calibration
• Fault Output Parts: Sealed industrial electromagnetic relay with internal surge absorption varistor
• Terminal Blocks: Tin-plated copper screw terminals for power input, sensor wiring and signal output

Installation Requirements

1. Vertical mounting on standard 35 mm top-hat DIN rail, horizontal installation is prohibited due to passive heat dissipation limitation
2. Reserve minimum 20 mm vertical clearance above and below the unit to ensure natural air convection heat dissipation
3. Vibration sensor wiring must use dedicated low-capacitance shielded coaxial cable specified by Vibro-Meter; ordinary twisted pair cable will cause signal attenuation and measurement distortion
4. Shield layer of sensor coaxial cable must be single-end grounded at the RPS6U cabinet side, floating ground at the probe/sensor side to eliminate ground loop noise
5. Separate routing for sensor signal cables and high-power drive cables; maintain more than 30 cm wiring separation distance to avoid electromagnetic coupling interference
6. Install inside air-conditioned sealed monitoring cabinet; avoid direct exposure to oil mist, water splash and corrosive gas from machinery equipment

Application Scenarios

• Thermal power plant steam turbine, generator shaft vibration and axial displacement online monitoring
• Marine vessel main diesel propulsion engine crankshaft vibration and bearing displacement safety monitoring
• Offshore platform gas turbine compressor rotating machinery condition monitoring
• Petrochemical refinery large centrifugal pump, fan vibration fault early warning system
• Hydropower station generator unit bearing vibration continuous measurement and protection

Operation & Maintenance Precautions

1. Do not apply DC voltage exceeding 30 V to auxiliary power input terminal; overvoltage will permanently damage internal isolated power supply circuit
2. All gain and zero offset calibration must be completed under power-off state to prevent unstable signal output during adjustment
3. Probe coaxial cable cannot be bent with small radius repeatedly; internal shielding layer fracture will cause severe measurement noise and signal drift
4. Avoid installing the unit beside high-power frequency converters and large AC contactors; strong electromagnetic radiation distorts vibration measurement precision
5. Clean dust accumulated on PCB heat dissipation area every 8 months; dust accumulation causes heat buildup and signal drift error
6. When replacing vibration sensors, cut off the power supply of RPS6U first; live plugging of probe cables will trigger false fault alarms and may damage internal amplifier chips