Practical Guide
Elcometer 145 Pressure Roller: Performing ISO 8502-3 Dust Tests Reproducibly
If dust remains on the substrate, adhesion suffers — and complaints become expensive. The Elcometer 145 pressure roller ensures that the dust test tape is pressed down with controlled, constant force in accordance with BS EN ISO 8502-3, delivering comparable and repeatable results.
Product Overview (Variants, Application, Benefits)
| Item | Details |
|---|---|
| Model / Order No. | Elcometer 145 (E145----1) |
| Purpose | For pressing the dust tape during surface dust testing — used together with the Elcometer 142 dust test kit. |
| Standard Reference | Provides the constant pressing force required by BS EN ISO 8502-3 (method reference within the standard). |
| Key Advantage | Reduces operator influence: defined force and defined rolling motion result in better comparability between inspectors, shifts, and job sites. |
Key Performance Indicators (What Matters in Practice)
Pressing Force
39.2–49.0 N
Guideline range with the spring fully compressed (constant tape pressure).
Repeatability
3× forward & 3× backward
Defined rolling motion across the tape reduces measurement variation.
Device Weight
615 g
Easy to handle on site and in workshops — ideal with the Elcometer 142 kit.
Practical Tip (For Clean, Comparable Results)
Apply the roller so that all four wheels are firmly in contact with the surface and guide each movement evenly.
If individual wheels lose contact, pressure is inconsistent and results become unreliable.
Recommended Basic Settings (Derived from Manual – Guideline Values)
| Parameter | Guideline | Why It Matters |
|---|---|---|
| Tape Length | Approx. 200 mm | Provides sufficient rolling distance and reliable evaluation. |
| Applied Pressure (Spring) | Spring fully compressed (force range 39.2–49.0 N) | Ensures the constant force required by the standard. |
| Rolling Passes | 3× forward and 3× backward | Ensures consistent tape contact over repeated movements. |
| Speed | 5–6 seconds per pass | Uniform contact time minimizes operator influence. |
| Free Edge | Leave approx. 50 mm free | Allows easy tape removal and evaluation. |
Note: Dimensions and values may vary depending on document version. Use these figures as guidelines and verify against your official documentation if required.
Professional Workflow (5–7 Steps)
- Apply dust test tape (from the Elcometer 142 kit) to the surface in a length of approx. 200 mm.
- Position the pressure roller at the end of the tape so that all four wheels rest evenly on the surface.
- Press the upper assembly downward until the spring is fully compressed (constant guideline force).
- Roll the device three times forward and backward across the tape, taking 5–6 seconds per movement.
- Leave approx. 50 mm of tape free at one end to facilitate removal.
- Remove the tape and evaluate/document the result according to the Elcometer 142 procedure.
Troubleshooting (4 Common Issues & Solutions)
1) Results vary significantly between inspectors
- Maintain consistent motion: 3× forward/backward, 5–6 seconds per pass.
- Check spring travel: Only a fully compressed spring delivers the defined force.
2) Uneven tape contact or gaps
- Ensure proper positioning so all four wheels are in contact.
- Guide the roller straight without tilting or twisting.
3) Tape is difficult to remove
- Always leave a 50 mm free edge for handling.
- Apply tape smoothly without creases to ensure clean removal.
4) Suspected incorrect pressure or spring issue
- Remember: force is applied by pressing the upper assembly onto the rubber roller.
- If recalibration is required, return the instrument to the dealer or Elcometer service.
Maintenance & Handling
- The Elcometer 145 has no user-serviceable parts. In case of malfunction, contact the dealer or manufacturer.
- If force accuracy is in doubt, arrange recalibration via Elcometer or an authorized partner.
- Dispose of packaging materials appropriately (cardboard/foam).
- Warranty: 1 year against manufacturing defects (wear and contamination excluded).
- For consistent results, always use the same test procedure and settings.
FAQ
1) Why do I need the Elcometer 145?
To ensure the dust test tape is pressed down with controlled, constant force as required by ISO 8502-3.
2) Which test kit is it used with?
It is used together with the Elcometer 142 dust test kit.
3) How do I ensure the correct force is applied?
By pressing the upper assembly until the spring is fully compressed (guideline force: 39.2–49.0 N).
4) How fast should I roll?
As a guideline: approx. 5–6 seconds per pass, three passes in each direction.
5) Are there any maintenance parts or DIY repairs?
No. There are no user-serviceable components. For service or recalibration, contact your dealer or Elcometer.
Conclusion
The Elcometer 145 pressure roller is a simple but powerful tool for achieving comparable ISO 8502-3 dust test results: defined force, defined motion, and reduced operator influence. If surface cleanliness is part of your coating quality process, this tool deserves a permanent place in your inspection workflow.
