Introduction 
Agilent Cary 3500 UV-Vis Spectrophotometer User’s Guide  25 
Never connect the gas directly to the module. Always use a pressure regulator 
that meets the specifications listed in this manual. 
 
Table 5  Purge gas flow rate requirements 
Cary 3500 Compact Peltier UV-Vis 
Cary 3500 Multicell Peltier UV-Vis 
Cary 3500 Multizone Peltier UV-Vis 
Cary Compact Peltier UV-Vis Module 
Cary Multicell Peltier UV-Vis Module 
 
If samples are frequently changed, you may need to increase the flow rate through 
the sample compartment.
 
Drain outlet 
In case of spills within the sample compartment, liquid will drain out of the drain 
outlet located under the module. To avoid spilling liquid onto the benchtop, the Cary 
3500 UV-Vis needs a drain vessel and tubing that will fit over the 6 mm OD sized 
tubing of the drain outlet for disposal of any fluids spilled in sample compartment. 
You must supply drain tubing and vessel that is suitable for the solvent in use. 
To install the drain tubing, slide the drain tubing over the drain outlet tubing on the 
module and then insert the free end of the tubing into the drain vessel. 
A chemically inert container, not glass or of a narrow-necked style, to hold a 
minimum of 2 liters (4 pints) of waste must be provided by the user. It should be 
located below the sample compartment where it is protected by the bench and in 
full view of the operator.