Description
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Dametric |
| Product Model | HPM-RM1 |
| Metso VAL Number | VAL0122850 |
| SKC Number | SKC9068256 |
| Product Type | Hydraulic Pressure Monitor |
| System | RMS / RMS-EX1 Refiner Monitoring System |
| Supply Voltage | +24 VDC ±10% |
| Maximum Current | Approx. 0.14 A |
| Pressure Input | 0–10 VDC |
| Input Interface | Pressure transducer signal |
| Digital Outputs | LIMIT 1, LIMIT 2, LIMIT 3 |
| Output Function | Adjustable pressure-limit monitoring |
| Limit Adjustment | Independent potentiometers |
| Application | Refiner hydraulic-pressure monitoring |
| Module Format | RMS rack-mounted module |
The HPM-RM1 is identified in RMS-EX1 documentation as the Hydraulic Pressure Monitor, with the cross-reference VAL0122850 / SKC9068256. It should be treated as a dedicated pressure-monitoring card rather than a generic analog-input module.
The module’s position in the RMS architecture is important. It works alongside other monitoring cards such as POM-RM1 for position, VIM-RM1 for vibration, and MPM-RM1 for motor power. Those modules may share the same general rack format while performing completely different measurement functions.
Application Scenarios & Pain Points
Hydraulic pressure is one of those measurements that can look perfectly normal until the process changes. A transducer that drifts only under operating temperature or vibration can create intermittent limit alarms that are difficult to reproduce during a maintenance shutdown.
Typical Applications
- Refiner Hydraulic Monitoring: HPM-RM1 monitors hydraulic pressure associated with the refiner process and provides threshold information to the control system.
- Pressure Limit Protection: Three configurable limit channels allow the system to distinguish different pressure conditions rather than relying on one fixed alarm point.
- RMS-EX1 Monitoring Racks: The module operates as part of a larger RMS monitoring system alongside position, vibration, temperature, and motor-power modules.
- Legacy Refiner Maintenance: A replacement HPM-RM1 is particularly useful when the installed RMS hardware remains serviceable but an individual monitoring channel has failed.
Field Case:
If the HPM-RM1 begins generating intermittent high-pressure alarms, check the pressure transducer and field cable before condemning the module. A noisy 0–10 V signal can make a healthy monitor appear defective. Record the actual pressure at the machine and compare it with the signal measured at the module terminals.
HPM-RM1-VAL0122850-SKC9068256.jpg
Related Products
- Dametric POM-RM1 — Position Monitor, VAL0123032 / SKC9068249. It monitors refiner position rather than hydraulic pressure and is one of the closest functional companions to HPM-RM1 within the RMS rack.
- Dametric VIM-RM1 — Vibration Monitor, VAL0123136 / SKC9068201. Used for vibration monitoring; similar rack architecture, completely different input function.
- Dametric MPM-RM1 — Motor Power Monitor, VAL0122978 / SKC9068218. Measures motor-power-related parameters rather than hydraulic pressure.
- Dametric LDU-RM1 — Limit Display Unit, VAL0122977 / SKC9068232. Provides limit/status display functionality rather than directly measuring pressure.
- Dametric OTM-RM1 — Optional Temperature Monitor, VAL0122982 / SKC9068263. Adds temperature monitoring to the RMS architecture and complements pressure monitoring.
- Dametric CMI-RM1 — Control Motor Interface, VAL0122828 / SKC9068191. Handles control/interface functions and is not an interchangeable pressure-monitoring module.
- Dametric TVD-RM3 — Touch Point Vibration Detector, VAL0123117 / SKC9251496. Designed for a different vibration-monitoring task and should not be used as an HPM replacement.
- Dametric POT-50 — Position transducer associated with POM-RM1. It is useful as a comparison when troubleshooting RMS sensor circuits, but it is not a hydraulic-pressure sensor.
The Engineer’s Guide: Field Pitfalls to Avoid
⚠️ Do Not Substitute Another RM1 Module
The RMS rack contains multiple modules with similar mechanical dimensions. POM-RM1, , MPM-RM1, VIM-RM1, and OTM-RM1 are not interchangeable simply because they fit the same rack format.
How to avoid it: Specify the complete identifier: / VAL0122850 / SKC9068256.
⚠️ Verify the Pressure Transducer Signal
A failed or drifting transducer can produce exactly the kind of symptoms normally attributed to a pressure-monitoring PCB.
How to avoid it: Measure the actual pressure and compare it with the voltage arriving at the input. Check the field cable, connector terminals, shielding, and signal stability before replacing the card.
⚠️ Preserve the Existing Limit Settings
Changing the pressure-limit potentiometers during replacement can alter alarm and shutdown behavior.
How to avoid it: Photograph the original settings before removal. Record the configured pressure thresholds and verify them against the plant control documentation after installation.
Frequently Asked Questions (FAQ)
What is Dametric VAL0122850?
is a hydraulic pressure monitoring module used in the RMS/RMS-EX1 refiner monitoring system. Its documented identifiers are VAL0122850 and SKC9068256.
What does the monitor?
It is designed to monitor hydraulic pressure associated with the refiner system and provide configurable limit information to the control system.
The pressure signal should be verified at the module input during troubleshooting rather than relying only on the displayed alarm.
Is interchangeable with POM-RM1?
No. POM-RM1 is a position monitor, while is a hydraulic pressure monitor. Their rack format may be similar, but their measurement circuitry and field connections are different.
For procurement, use the complete cross-reference rather than the generic RMS module designation.
What should I check before replacing an ?
Use this sequence:
- Verify the pressure reading at the machine.
- Measure the transducer output at the field end.
- Measure the same signal at the RMS module input.
- Inspect cable shielding and terminals.
- Check the configured limit thresholds.
- Only then substitute the .
This approach separates a sensor/cable problem from a genuine monitor-board failure.
What should I request when buying a refurbished ?
Ask for:
- Front and rear PCB photographs
- marking
- VAL0122850 marking
- SKC9068256 marking
- Connector-condition photographs
- 24 VDC power-up test
- Pressure-input simulation
- LIMIT 1/2/3 output testing
- Potentiometer inspection
- LED/status verification
- ESD-safe packaging
- Warranty terms
A power-up-only test is not enough for a pressure-monitoring module.
Can a new-surplus be used in an existing RMS-EX1 system?
Potentially, yes, provided the module identification and system configuration match. Because this is legacy monitoring hardware, verify the installed RMS rack configuration and field wiring before installation.
What is the biggest procurement risk with ?
Confusing the pressure monitor with another RMS monitoring card. The safest purchasing description is:
Dametric — — SKC9068256 — Hydraulic Pressure Monitor for RMS/RMS-EX1.
That three-part identification sharply reduces the chance of receiving a visually similar but functionally incorrect module.
