Machine monitoring vibration meter PCH

for machine condition monitoringfor hazardous locationswith data logger

Overview
With PCH Engineering’s compact range of vibration monitors with built-in accelerometers, you can measure and monitor the vibration level of simple rotating machinery as a cost-effective permanent, real-time monitoring solution. Custom-defined alarm and danger relays reduce the need for human intervention, and scalar values of selected frequency ranges can be used for trending.

Benefits

• Affordable compact monitors for protection of simple rotating machinery
• Retrofit-ready with integrated sensors
• Trend data collection and FFT analysis supported via PCH Vibration Studio
• Integration to SCADA/PLC via 4-20 mA and communication protocols (Modbus, TCP, RTU, OPC UA with PCH EtherBridge)

Proven in use
Used on many types of rotating equipment including:

• Centrifuges, separators, decanters and purifiers
• Gears
• Blowers, fans and pumps
• Spray driers and atomizers
• Cooling towers
• Food and chemical treatment units
• Power plants
• Cement plants

PCH 1220 Electronic Vibration Switch
A low-cost electronic vibration switch with one relay and no 4-20 mA output. Constantly monitors machine vibration within a 10-1000 Hz (ISO 10816-3/20816-3) frequency band and compares the value to a preset alarm threshold. Supplied in stainless steel 1.405 housing with integrated M8 mounting stud and M12 top-exit connector.

PCH 1220 — Measuring parameter and features

• Measuring parameter: velocity in mm/s
• Frequency range: 10 to 1000 Hz (DIN/ISO 10816-3/20816-3)
• Alarm level in mm/s pre-set to individual requirements
• Alarm relay with adjustable delay time
• Status indicator via LED on the monitor
• 4-pin M12 connector

PCH 1232 Vibration Guard (Modbus RTU)
Uses several narrow filter bands to enhance condition monitoring. Tracks lower vibration amplitudes, supplies more condition data and integrates with Modbus RTU on RS-485 networks. Setup possible via PCH Vibration Studio through USB or RS-485. Self-test function can be activated externally.

PCH 1232 — Features

• Measuring parameter: velocity (mm/s) or acceleration (m/s²), RMS or Peak
• Frequency ranges: 10 to 1000 Hz or selectable HP/LP filters for narrow bands
• Up to 4 configurable filter bands with scalar values
• 2 alarm levels with individual delay times per filter band
• 2 analog DC outputs 4-20 mA and 2 alarm relays
• RS-485 and Modbus RTU communication
• Setup by PCH Vibration Studio through USB or RS-485
• Self-test function can be externally activated

PCH 1270 / PCH 1272 Vibration Guard (SIL 2)
Designed for safety chains where high accuracy and fast response are required. Compares vibration levels with internal thresholds up to 10 times per second for early warning or emergency shutdown. Offers standard ISO 10816-3/20816-3 filter ranges or customised filter ranges.

PCH 1270 / 1272 — Features

• Measuring parameter: velocity (mm/s) or acceleration (m/s²)
• Frequency range: 10 to 1000 Hz or 1 to 30/300 Hz
• 2 alarm levels with individual delay times and 2 alarm relays
• Analogue DC output RMS 4-20 mA, proportional to 0–100%
• Measuring range selectable: 10/20/50/100 mm/s or m/s² RMS
• Self-test function can be activated externally
• Safety level SIL 2 rated; GOST-R certificate; ETL listing on request
• RS-485 version available as PCH 1272 for communication with PCH user software

PCH 1275 / PCH 1277 Vibration Guard (ATEX + SIL 2)
ATEX and IECEx certified compact vibration sensors with SIL 2 relays for hazardous areas (suitable for ATEX zones 1 and 21). Provide early warning and can be configured for emergency shutdown. Comply with Functional Safety (EN13849), PL-d (SIL 2). RS-485 version available as PCH 1277 for communication with PCH user software.

PCH 1275 / 1277 — Features

• Measuring parameter: velocity (mm/s) or acceleration (m/s²)
• Frequency range: 10 to 1000 Hz or 1 to 30/300 Hz
• 2 alarm levels with individual delay times and 2 alarm relays
• Analogue DC output RMS 4-20 mA, proportional to 0–100%
• Measuring range selectable: 10 to 100 mm/s or m/s² RMS
• Self-test function can be activated externally
• Safety level SIL 2 rated; ATEX version suitable for zone 1 and zone 21
• EAC certification available in special execution
• RS-485 version available as PCH 1277

Additional capabilities
Scalar values and real-time waveform recordings can be collected by PCH Vibration Studio. Waveforms can be FFT transformed and analysed on site or remotely. Trend data can be supplied to SCADA/PLC using 4-20 mA signals or communication protocols as applicable.

Technical specifications

• Built-in analogue and digital accelerometers in the compact range
• Measuring parameters: velocity (mm/s), acceleration (m/s²), RMS or Peak depending on model
• Frequency bands: commonly 10–1000 Hz; selectable narrow bands or 1–30/300 Hz options on some models
• Outputs: alarm relays (1 or 2), analogue DC 4-20 mA on models with analogue output
• Communication: RS-485 / Modbus RTU available on specific models; PCH EtherBridge for additional protocols
• Safety: many monitors SIL 2 rated with diagnostic coverage numbers available
• ATEX / IECEx certified versions available for hazardous zones (PCH 1275 / 1277)
• Self-test function available and can be activated externally on multiple models