Rhopoint IQ 20°/60° Goniophotometer

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Description

The Rhopoint IQ represents the perfect upgrade to classic Gloss-Meters

IQ GLOSS measurements are fully compatible with existing Novo-Gloss and Micro-Tri-gloss results.

Dualgloss 20/60° or Trigloss 20/60/85° versions for maximum accuracy and resolution in all applications that require gloss measurement.

The Rhopoint IQ measures image quality and profiles how light is reflected from a surface. Standard glossmeters only measure how much light is reflected and are not sensitive to effects which dramatically reduce appearance quality.

 

Advanced features – for FAST easy measurement

  • Large colour screen for all values at a glance
  • Onboard Statistics and Graphs
  • USB results download to PC without the need to install software
  • Batch description with user definable names
  • Bluetooth compatible
  • Pocket sized instrument with integrated tile holder
  • Single button press to measure all parameters
  • Fast measurement, <2 sec.
  • Fast and simultaneous measurement of all parameters
  • Fully automatic calibration with tile detection and verification
  • USB or mains rechargeable in 4.5 or 2.5 hours
  • 17hrs+ continuous operation or 20,000+ readings
  • On board memory for 999+ readings with full

Best in class accuracy and traceability

  • Advanced standard verification system guarantees error free calibration.

Features

The Rhopoint IQ measures

20/60 or 20/60/85° Gloss • Haze (reflection) • RIQ, DOI • RSPEC • Goniophotometric curves.

GLOSS
A measurement proportional to the amount of light reflected specularly from a surface.

Geometry: For best results the correct measurement geometry should be chosen based on the reflectance of the material:
Matt Finish 85°, Mid Gloss 60°, High Gloss and Metallic samples 20°.

Measurement Unit: GU

PEAK GLOSS VALUE (RSPEC)
The peak gloss value over a very narrow angle.

Usage: RSPEC is very sensitive to small changes in texture and is used to identify subtle differences in surface smoothness.

Measurement Unit: Gloss Units (GU)

REFLECTANCE HAZE
An optical effect caused by microscopic textures or residue on a surface.

Visible Symptoms: Milky Finish apparent on surface, loss of reflected contrast, halos and patterns can be seen around reflections of high intensity light sources on high gloss and metallic samples/mirrors.

Causes: Poor dispersion, raw material incompatibility, additive migration, vehicle quality, stoving/drying/curing conditions, polishing marks, fine scrat­ches, ageing, oxidisation, poor cleanliness/surface residue.

Measurement Unit: LogHU

Example of a coated and polished surface without and with Reflected Haze

DISTINCTNESS OF IMAGE (DOI) 
A measure of how clearly a reflected image will appear in a reflective surface.

Symptoms of poor DOI: Orange peel, brush marks, waviness or other structures visible on the surface, reflected images are distorted.

Causes: application problems, incorrect coating flow, coating viscosity too high/low, sag or flow of coating before curing, incorrect particle size/distribution, overspray, improper flash/recoat time, inter coat compatibility, incorrect cure times and cure temperature.

Measurement Scale: 0-100 whereas 100 represents a perfect smooth surface.

REFLECTED IMAGE QUALITY (RIQ) 
Like DOI, Reflected Image Quality (RIQ) is used to detect Orange peel effects. However, the RIQ value provides high resolution results with better correlation to the human perception of  surface textures, especially on high quality surfaces such as automotive paints.

Measurement Scale: 0-100 whereas 100 represents a perfect smooth surface.

Reflected image quality can be expressed as Orange peel (DOI) or Reflected Image Quality (RIQ)

GONIOPHOTOMETRIC PROFILE 
The instrument displays surface reflectance profiles 17-23°. The shape of the curve describes how the light has interacted with the surface. Sharp curves close to the specular direction indicate smooth highly reflective surfaces.

An on screen goniophotometric profile shows the distribution of the reflected light
On screen graphs highlight trends in the measured batch

 

Specifications

GLOSS MEASUREMENT SPECIFICATION
Measuring Angle 20° Improved accuracy and resolution on high gloss & metallic samples (>70 GU when measured at 60°)
Measuring Angle 60° Universal angle– all gloss levels
Measuring Angle 85° Improved Resolution for Matt Finishes (<10 GU when measured at 60°)

(only for Rhopoint IQ 20/60/85°)
Measurement range 20º: 0-2000 GU
60º: 0-1000 GU
85º: 0-199G U
Resolution 0.1 GU
Standards ISO 2813, ASTM D523, ASTM D2457, DIN 67530, JIS 8741
(Conforms 60° & 85° / Verified Performance 20°)
RSPEC MEASUREMENT SPECIFICATION
Peak Specular Reflectance 20° +/-0.09912°
Measurement Range 0 – 2.000 GU
HAZE MEASUREMENT SPECIFICATION
Near Specular Reflectance Measured at 17-19°, 21-23°; Switchable between Haze Units (HU) and Log Haze Units (LogHU)
Resolution 0.1 HU
Repeatability +/- 0.5 HU
Reproducibility 1.5 HU
Standards ASTM E430, ISO 13803
DOI MEASUREMENT SPECIFICATION
Measurement Range 0 – 100
Resolution 0.1
Repeatability 0.2
Reproducibility 0.5
Standards ASTM D5767
RIQ MEASUREMENT SPECIFICATION
Measurement range 0 – 100
Resolution 0.1
Repeatability 0.2
Reproducibility 0.5
GONIOPHOTOMETRIC SPECIFICATION
Measurement range 12.75-27.25°, reported 14-26°
Angular Resolution Appr. 0.02832°
Resolution 0.1 GU
INSTRUMENT SPECIFICATIONS
Colour Screen Screen High resolution illuminated colour display; Brightness adjustable
Construction All aluminium construction – enclosure, optics, calibration holder; magnetic calibration holder with in position detector
Statistical Analysis Max, Min, Mean, S.D.; all measured parameters
Graphical Analysis On board trend analysis; Gloss and IQ Values
Power Rechargeable Lithium Ion; >17 Hours operation; >20,000 Readings/Charge
Operate from Internal Battery/USB/Mains Charger
Recharge Time USB 4 .5 Hrs; Mains Charger 2.5 Hrs
Data Memory 8 MB –> 999 Readings; User definable batching
Data Transfer Bluetooth; PC & MAC compatible; USB Connection
Dimensions & Weigh 65 x 140 x 50mm (H x W x D); 790g
Interface Languages English, German, French, Spanish, Italian, Turkish, Japanese

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