Lovibond PFX950 + heater, Operator'S Instruction Manual, Page: 15 / 19

ISSUE NO. V1.3 DATE 12/12/00 15
Sample chamber
In extreme cases the sample chamber can be removed for cleaning or replacement. To remove the
sample chamber, open the sample chamber lid to its full extent. The sample chamber can then be
lifted free from the instrument base as shown in the diagram. If a heater unit is fitted, then the left
hand main lid requires removal in order to disconnect the heater power cable and thermocouple
leads from the heater controller. This step is required before the sample chamber can be removed.
Keypad
•
Disconnect the instrument from the power supply before removing the main covers.
•
Slide the cover to the right until it releases and carefully lift clear of the instrument.
• Unplug the ribbon cables to the keypad and display.
•
Carefully lift one edge of the keypad and peel away from the main lid.
• Remove any remaining adhesive on the lid using isopropanol alcohol.
• Peel the backing from the new keypad and thread the ribbon cable back through the aperture.
•
Carefully align the keypad within the recess and press into place using a soft cloth.
• Replace all ribbon cables and lids in their original position.
10. Accessories and spares
Spares
The only component that requires periodic replacement is the lamp. None of the fuses used in the Lovibond PFX995/950 instruments
are replaceable. The sample chamber and the keypad are also available as replacement items:
Code Description
13 81 80 PFX995/950 Lamp 5V
13 92 00 PFX995/950 sample chamber
13 89 10 PFX995/950 membrane keypad
Instructions for replacement of spares are included under the section
‘Replacing spare parts’
Accessories (PFX950)
Code Description
13 89 00 Upgrade kit for Chlorophyll A & B and beta carotene
13 87 00 Windows software for data capture on PC
Lovibond glass cells
The Lovibond PFX995/950 instruments use the W600 series of glass cells. The choice of cell path length depends on the instrument
version and the colour scale being used. For versions equipped with the heater unit and whenever hot samples are measured, it is
recommended that borosilicate cells be used.
W600/OG Series
Fused Optical Glass
W600/B Series
Fused Borosilicate Glass
Path Length Order Code Type Order Code Type
2.5 mm 60 59 40 W600/OG/2.5
5 mm 60 59 50 W600/OG/5
10 mm 60 59 60 W600/OG/10 65 59 60 W600/B/10
15 mm 60 59 70 W600/OG/15
20 mm 60 59 80 W600/OG/20
25 mm 60 59 90 W600/OG/25 65 59 90 W600/B/25
33 mm 60 60 10 W600/OG/33 65 60 10 W600/B/33
40 mm 60 60 20 W600/OG/40 65 60 20 W600/B/40
50 mm 60 62 00 W600/OG/50
100 mm 60 60 30 W600/OG/100 65 60 30 W600/B/100
1
/
16
” 60 60 40 W600/OG/
1
/
16
” 65 60 40 W600/B/
1
/
16
”
1
/
8
” 60 60 50 W600/OG/
1
/
8
” 65 60 50 W600/B/
1
/
8
”
¼” 60 60 60 W600/OG/¼” 65 60 60 W600/B/¼”
½” 60 60 70 W600/OG/½” 65 60 70 W600/B/½”
1” 60 60 80 W600/OG/1” 65 60 80 W600/B/1”
2” 60 60 90 W600/OG/2” 65 60 90 W600/B/2”
3” 60 61 00 W600/OG/3” 65 61 00 W600/B/3”
4” 60 61 10 W600/OG/4” 65 61 10 W600/B/4”
5” 60 61 20 W600/OG/5” 65 61 20 W600/B/5”
5 ¼” 60 61 30 W600/OG/5 ¼” 65 61 30 W600/B/5 ¼”
6” 60 61 50 W600/OG/6” 65 61 50 W600/B/6”
For further information on Lovibond cells, please ask your supplier.