Thermo 335904, Operator'S Manual, Page: 68 / 94

Changing cell holders
If you want to use longpath cells (cylindrical or
rectangular), use test tubes, measure solid filters or
regulate cell temperature via an external water
circulator, you must install the appropriate cell
holders. You can easily remove the 6-Position Cell
Holder installed in the instrument and install other
accessory cell holders.
*Whenever you change from one type of cell
holder to another, you must measure a blank. This
ensures that the instrument can detect which type
of cell holder is installed.
Removing the 6-Position Cell Holder
1. Open the sample compartment and let the
sample compartment door rest on its hinge.
2. With one hand, loosen the captive thumbscrew.
3. With the other hand, pull straight up on the 6-
Position Cell Holder and lift it out of the sample
compartment.
Installing the 6-Position Cell Holder
1. Open the sample compartment and let the
sample compartment door rest on its hinge.
2. With one hand, carefully lower the 6-Position
Cell Holder straight down into the sample
compartment.
3. With the other hand, tighten the captive
thumbscrew.
4. Close the sample compartment.
5. Take a blank measurement to ensure that the
instrument detects that you have installed the
6-Position Cell Holder.
Installing the Single-Position Cell Holder
1. With the sample compartment open, place the
Single-Position Cell Platform as shown in
Figure 5.
2. Tighten the screws securely.
Note: If the cell holder is not aligned correctly, you
will not be able to tighten the screws.
3. Take a blank Measurement to ensure that the
instrument detects that you have installed the
Single-Cell Platform.
Installing accessory cell holders
1. Make sure that you have the correct cell holder
installed. If you want to use 100mm longpath
cells, you must install the Single-Position Cell
Holder.
2. Install the desired accessory cell holders by
tightening the screw on each cell holder.
Note: You can install only three each of some
accessory cell holders. Make sure to place
them in positions B, 2 and 4.
Connecting & Using Accessories
Thermo Electron Corporation 5-2
Catalog # Description
335921 Accessory Door Kit - Includes spout and four ports for circulating water around water-
jacketed cells, or for waste outlet for flowcell systems.
335977 Funnel Flowcell - 10mm pathlength, optical glass, for measurements between 335-
1100nm; fits on 335916 Single Cell Holder Platform (holds one).
335927 6-Position Cell Holder - platform with six (6) 336028 single cell holders installed.
333150 SPECTRONIC Standards
336029 Spacers - 5mm, set of 2, for use with 5mm short pathlength cuvettes in any square cell
holder.
336030 Spacers - 8mm, set of 2, for use with 2mm or 1mm short pathlength cuvettes in any
square cell holder.
335942 Serial interface cable to connect the spectrophotometer to an IBM-compatible PC.
331751 Ultra-microcell - 10 µ l fill volume, 1mm pathlength, 40mm tall, quartz.
331752 Ultra-microcell - 70
µ
l fill volume, 10mm pathlength, 50mm tall, quartz. Requires 335916
Single Cell Holder Platform (holds one) for optimal performance
Note: If you want to use 100mm longpath cells, you must install the Single-Position Cell Platform.