Metrix 5533-104 | Proximity Transducer / Eddy Current System / In Stock

Description

⚙️ Key Technical Specifications

🔍 Product Introduction

Let’s be honest: if you are running centrifugal compressors or large steam turbines, you don’t have the luxury of “guessing” shaft position. The Metrix 5533-104 is the workhorse interface that sits between your harsh environment probe and your PLC or DCS. I’ve seen these units sitting inside control cabinets that hit 60°C in the middle of July, still churning out stable data while cheaper modules drift off-scale.This isn’t just a generic amplifier; it is part of a tuned system. It takes the raw RF signal from the eddy current tip and cleans it up. What makes the 5533-104 stand out is its ability to handle high temperatures without losing linearity. It ensures that when your rotor moves 1 mil, your display shows exactly 1 mil, not 0.9 or 1.2. It’s built to API 670 standards, which means it survives the electromagnetic noise of a variable frequency drive (VFD) screaming at full load.

🏭 Application Scenarios & Field Case Study

Common Use Cases:

• Turbomachinery: Monitoring radial vibration and axial position (thrust) on API 617 compressors.
• Power Generation: Tracking shaft eccentricity during turbine startup to prevent bowing.
• Oil & Gas: Detecting gear tooth timing (Keyphasor®) for balancing and speed measurement.
• Heavy Industry: Monitoring sleeve bearing wear in large induction motors.

Field Failure Story (Gulf Coast Refinery):

We had a recurring issue on an amine feed pump where the vibration readings would spike randomly during the day, causing nuisance trips. The client blamed the probe. I swapped the probe, but the problem persisted. I pulled out the oscilloscope and checked the output of the old 5533-104 transducer. It turned out the internal oscillator was failing intermittently due to heat soak from the pump casing. We replaced the transducer with a fresh 5533-104, added some thermal insulation to the mounting bracket, and the noise floor dropped from 200mV to a clean 10mV. Problem solved in 20 minutes.

🛠️ Quality SOP & Tech Pitfalls

The Lab Report (SOP):
Before we ship, we don’t just look at the box.

1. Visual Inspection: We check the BNC connectors for bent pins and ensure the potting compound hasn’t cracked (a sign of impact damage).
2. Live Bench Test: We hook it up to a calibrated simulator (Concord or equivalent) to verify the gap voltage output matches the input curve.
3. Noise Floor Check: Using a Fluke multimeter, we verify the DC bias voltage is stable and free of AC ripple.
4. Packaging: Double-wrapped in anti-static bags with desiccant. Moisture kills these boards during shipping.

The Engineer’s Warning (Pitfalls):

• The “System” Trap: You cannot mix and match brands willy-nilly. While the 5533-104 is robust, it is tuned to the impedance of Metrix probes. If you slap a generic probe on it, your sensitivity will be wrong, and your alarms will trigger at the wrong times.
• Ground Loops: I’ve seen these fry because the shield grounding wasn’t isolated. If you ground both ends of the cable, you create a loop that induces 60Hz hum right into your vibration signal. Keep the shield grounded at one end only (usually the transducer side).

🔧 Installation & Configuration Guide

This is a precision instrument, not a light switch. Treat it with respect.

1. Pre-Installation (Safety First):
   • ⚠️ Lockout/Tagout (LOTO): Kill the power to the monitor rack. These units usually run on -24V DC supplied by the monitor card.
   • Photo Op: Take a picture of the existing wiring. Specifically, note which terminal is “Signal Out,” “Common,” and “Supply.”
2. Removal:
   • Label your cables. Don’t trust the fading ink on the old ferrules.
   • Disconnect the coaxial cable from the probe carefully—don’t twist the center pin.
3. Installation:
   • Seat the Module: If this is a rail-mount version, snap it in firmly. Vibration can shake a loose module right off the rail.
   • Torque Terminals: Tighten the terminal block screws to spec. Loose connections cause intermittent spikes that look like mechanical looseness.
   • Verify Probe Gap: Before powering up, ensure the physical gap between the probe tip and the shaft is set correctly (usually -10V DC bias).
4. Power-On & Testing:
   • Apply power. Check the “OK” or “Bypass” LED on the main monitor.
   • Measure the DC gap voltage at the output. It should match your installed gap (e.g., -10.0V DC).
   • Run a slow roll test (bump the machine) to ensure the waveform follows the shaft rotation smoothly.

🔄 Compatible Replacement Models

❓ Frequently Asked Questions (FAQ)

Q: Can I use this with a Bently Nevada probe?
A: Technically? Maybe. Should you? No. The 5533-104 is calibrated for the specific impedance and coil resistance of Metrix probes. Mixing them creates a calibration error that you can’t easily fix without a shaker table. Stick to the same brand ecosystem.Q: My reading is drifting. Is it the 5533-104 or the cable?
A: 90% of the time, it’s the cable or the probe tip getting dirty/oily. Eddy currents hate oil ingress. Check the cable continuity first. If the cable checks out, then suspect the transducer.Q: Does this come with the extension cable?
A: No. The 5533-104 is just the transducer module. You need to order the extension cable (like the 9282 series) and the probe separately.Q: How do I know if it’s actually working before I install it?
A: You need a proximitator tester or a simple voltmeter. Power it up with -24V DC. Touch a piece of metal to the probe tip. The voltage should change linearly. If it jumps around or stays flat, it’s dead.Q: Is this unit explosion-proof?
A: The electronics inside aren’t inherently explosion-proof, but they are usually housed in an enclosure that is rated for the area. The 5533-104 itself is designed to be intrinsically safe when connected to approved barriers, but check your specific hazardous area classification.