ISSUE NO. V1.3 DATE 12/12/00 3
1.
Intr
oduc
tion
U
sing the manual
The following typefaces and icons are used in this manual:
[ ] Characters between bold square brackets indicate a key on the keypad.
Examples:
[ ^ ] One of the keys directly below the display
[ZERO] Baseline measurement key
Italics A typeface in bold Italics indicates characters as shown on the display.
Examples:
Select menu item
Press any key to continue
Caution and safety signs
Caution Refer to manual
Warning Hot surface
An internal heater unit with a maximum temperature of 95°C may be present as a factory fitted option.
DO NOT TOUCH THE HEATER UNIT WHEN IT IS HOT
User responsibility
The responsible body should be made aware that if the instrument is used in any way not specified by the manufacturer, the protection
provided by the equipment might be impaired.
The instrument is fitted with anti-tamper varnish in some critical areas. The instrument warranty is invalidated if these areas have been
adjusted by anyone other than The Tintometer Ltd.
2. Instrument specification
Descri
ption
The Lovibond PFX995/950 instruments are high-precision, spectrophotometric colorimeters, which are designed for objective colour
measurement of clear liquids or transparent solids. They are easy to use, automatic instruments, which overcome the subjectivity of
visual methods. The menu system guides operators through the selection of operating parameters. Thereafter, measurements are
initiated by just a single key press and take less than 25 seconds to complete. They are rugged colorimeters with fabricated steel
housing, which are designed to function equally as a QC instrument within the laboratory or on 24-hour operation in a process control
environment.
The Lovibond PFX995/950 operates as a stand-alone colorimeter containing a standardised light source and collimator, sample
chamber with optional heater unit, light detector, monochromator and processor board. Wavelengths over the 420 - 710 nm range are
isolated by the 16 narrow-bandpass interference filters, automatically selected in rapid sequence. The filters have peak transmissions
on average of 20 nm apart but the measuring system is programmed to interpolate transmission figures for wavebands at 5 nm
intervals, producing a total of 61 readings.
When printing results, the PFX995/950 will link with standard parallel printers.
Colour scales and optional items
The Lovibond PFX995/950 instruments are designed to meet the colour analysis requirements in the oils/chemicals and the mineral
oils/petrochemicals industries. The PFX995 provides colour data according to a full range of established industry scales. The PFX950
is limited to the most commonly used scales. Measurements can also be displayed in terms of spectral data and CIE values. The user
can easily customise both PFX995 instruments to display only those scales of interest.
The following selection of colour scales is included as standard on the PFX995/950 series:
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