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Lovibond PFX 195 Automatic Colorimeter »öÂ÷°è

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Lovibond PFX 195 Automatic Colorimeter

Automatic Grading of One Dimensional Colour Scales
The Lovibond PFX195 is a low-cost spectrophotometric colorimeter, which automatically measures the colour of transparent samples according to the one-dimensional colour scales that have been adopted as industry standards in oils and chemicals processing. Results can also be displayed in terms of spectral data and CIE values. Each version of the PFX195 includes a selection of standard colour scales that are used in a specific industry sector: the PFX195/1 for chemicals, industrial oils and fatty acids, the PFX195/3 for dark oils and fats and the PFX195/6 for industrial oils and surfactants. Colour scale upgrade kits enable additional colour scales to be added to standard instrument versions. The PFX195 also allows users to obtain a closest match to stored references or to build up a customised scale from a series of reference samples. It includes a calculation and description of off-hue factor for many scales.

Colour Scale Range
Path length
PFX195/1
PFX195/2

Pt-Co/Hazen/APHA Colour

0 - 500 mg Pt/l 50 mm

o

Gardner Colour

1 - 18 units 10 mm

o

FAC Colour

1 - 45 (odd numbers) 10 mm

o

Iodine Colour

1 - 500 units 10 mm

o

Hess-Ives Colour Units

10, 25, 50 mm

o

o

Klett Colour (blue filter KS-42)

 

40 mm

o

o

Rosin, US Naval Stores

XC - D + FF 7/8"

o

o

Yellowness Index

 

10, 25, 50 mm

o

o

CIE Values

- X Y Z tristimulus values Defined by spectrum locus Depends on saturation of sample colour

- x y Y chromaticity co-ordinates
- CIE L*a*b* colour space
- ^E colour difference
- CIE L C h
o
o

Spectral data

- transmittance 0 - 100% (full spectrum and specified wavelength)

 

- optical density 0 - 2.5 (full spectrum and specified wavelength)

Optional Items for Individual Applications

Conformance filter sets

Sets of graded glass filters, representing a spread of colour from each of the main scales, are available for quick and simple calibration checks

o

o

Certified colour reference standards

Ideal for routine calibration of and verification of test data

o

o

Adaptor for 10.65 mm (Gardner) tubes

For Gardner colour of hot samples in tubes (eg testing the colour stability of fatty acids and drying oils after heating).

o

o

Spectrophotometer cell holder

Allows use of standard width (12.5 mm) spectrophotometer cells

o

o

• included as standard / o available as an optional upgrade

Confidence in Colour Measurement
The Lovibond PFX195 responds to the demand for consistent and reliable colour data, from R&D through to processing and production. It removes all subjectivity involved in colour measurement, supplying unbiased readings that are unaffected by operator or environment. The proven optical system ensures excellent repeatability of measurements giving confidence in communication and control of colour. For regular conformance testing the PFX195 is supplied with a certified glass filter of specified colour value (filter sets are available).

Colour Testing and Analysis Made Simple
The Lovibond PFX195 is an easy to use, automatic instrument requiring no special skills to operate. The built-in menu guides users through the selection of operating parameters such as colour scale. Thereafter, readings are made with a single key press, taking less than 25 seconds to complete. Data sets can be saved in the instrument, printed out or automatically down loaded to a PC computer where they can be processed and stored for future analysis, traceability and monitoring trends. ^E colour difference measurements can be used to ensure samples fall within acceptable colour limits. A Windows software program enables the generation of spectral and CIE diagrams as well as analysis of spectral data.

Ideally Suited to Laboratory or Production Environments
Comprehensive facilities for colour measurement and data analysis make the Lovibond PFX195 an ideal choice for the laboratory. However, with excellent calibration stability, password protection for tamper proof control and simple operation, the Lovibond PFX195 also supports the migration of quality control to the manufacturing
area, making it a cost-effective option for dedicated production testing. For easy maintenance, the Lovibond PFX195 includes a robust steel sample chamber, which is easily removed and cleaned if a spillage occurs, and the precision filament lamp is easily assessed and changed from outside the instrument.


TECHNICAL SPECIFICATION

Measuring principle 9 interference filters
Spectral response 420 - 710 nm
Bandwidth 20 nm
Repeatability  

- chromaticity (x y)

¡¾ 0.0004

- transmittance

¡¾ 0.5 %
Measurement time Less than 25 seconds
Calibration Single key press; fully automated
Light source 5 Volt, 10 Watt tungsten halogen lamp
(lens ended)
Illuminant CIE Illuminant A, B, C, D65
Observers 2¡Æ, 10¡Æ
Path length 0.1 - 50 mm
Interface Parallel printer port, RS 232 port
Data Storage Up to 32 data sets
Input voltage Universal, via external power supply
Approvals CE
Display 2 x 40-character, back-lit LCD
Keypad 21-key membrane keypad; washable
polyester with audible feedback
Instructions 7 languages: English, French, German,
Spanish, Italian, Portuguese,Dutch
Instrument housing Fabricated sheet steel with tough,
textured paint finish
Dimensions Width 290mm, depth 360mm, height 120mm
Weight 6.8 kg

The Lovibond PFX195 is supplied complete with Windows software, accessories and spares, optical glass cells of the relevant path lengths for each of the colour scales included, a calibrated glass conformance filter and instructions.