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Lovibond PFX 195 Automatic Colorimeter
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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.
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| Colour
Scale |
Range |
Path length
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PFX195/1
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PFX195/2
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Pt-Co/Hazen/APHA
Colour
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0 - 500 mg Pt/l |
50 mm |
o
|
•
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Gardner
Colour
|
1 - 18 units |
10 mm |
•
|
o
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FAC
Colour
|
1 - 45 (odd numbers) |
10 mm |
o
|
•
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Iodine
Colour
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1 - 500 units |
10 mm |
•
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o
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Hess-Ives
Colour Units
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|
10, 25, 50 mm |
o
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o
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Klett
Colour (blue filter KS-42)
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40 mm |
o
|
o
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Rosin, US
Naval Stores
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XC - D + FF |
7/8" |
o
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o
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Yellowness
Index
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10, 25, 50 mm |
o
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o
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CIE
Values
|
- X Y Z
tristimulus values |
Defined by
spectrum locus |
Depends on
saturation of sample colour |
•
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•
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| - x y Y chromaticity
co-ordinates |
•
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•
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| - CIE L*a*b* colour
space |
•
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•
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| - ^E colour difference |
•
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•
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| - CIE L C h |
o
|
o
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Spectral
data
|
- transmittance |
0 - 100% (full spectrum
and specified wavelength) |
|
•
|
•
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| - optical density |
0 - 2.5 (full spectrum
and specified wavelength) |
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•
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Optional
Items for Individual Applications
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Conformance
filter sets
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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
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o
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Certified
colour reference standards
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Ideal for
routine calibration of and verification of test data |
o
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o
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Adaptor
for 10.65 mm (Gardner) tubes
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For Gardner
colour of hot samples in tubes (eg testing the colour stability of
fatty acids and drying oils after heating). |
o
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o
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Spectrophotometer
cell holder
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Allows use
of standard width (12.5 mm) spectrophotometer cells |
o
|
o
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• included as standard / o
available as an optional upgrade
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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.
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TECHNICAL
SPECIFICATION
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| Measuring
principle |
9
interference filters |
| Spectral
response |
420 -
710 nm |
| Bandwidth |
20 nm |
| Repeatability |
|
- chromaticity
(x y)
|
±
0.0004 |
- transmittance
|
± 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°, 10° |
| 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 |
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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.
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