Desorption Tube and Needle Conditioning Oven
for Batch Cleaning and Baking Out of Thermal
Desorption Tubes and Needles.
T
his 24 tube conditioning oven is used for batch flow
conditioning of both empty and packed glass lined SS
(GLT) desorption tubes as well as for the flow condi-
tioning of the desorption tube needles. The system is designed
much like the 6 port conditioning oven but contains a much larg-
er heater block with 24 ports for tubes and needles. Four port
manifold handles permit the flow conditioning of 4 tubes or nee-
dles from one ball rotameter.
Each of the six adjustable flow bubble rotameters has a flow
range between 0 and 50 ml/min, one for each of the manifolds
with tubes or needles to be conditioned. Each of the flows to the
manifolds can be independently controlled via a microneedle
valve and the flow turned off to that port when not needed. A sin-
gle electrically operated solenoid valve (Gas Valve) turns off or
on the gas to all the ports via the Gas Switch on the front panel.
On the top of the Conditioning Oven six quick disconnects con-
nect to 1/8" flexible nylon tubing to provide gas flow through the
manifolds with desorption tubes and needles during condition-
ing. When the quick disconnect is removed, the gas flow is auto-
matically closed to that port. By providing gas flow from a carri-
er gas such as high purity helium or nitrogen through the des-
orption tubes and needles while conditioning, it can be assured
that no oxygen enters the GLT desorption tube which could
destroy the adsorbent material. Impurities from the inside of the
desorption tubes and needles are flushed through. A single 1/8"
fitting on the back of the Conditioning System is provided for the
attachment of the carrier gas from the source.
Electrical power to the conditioning system oven is provided
from a standard 110 volt, 10 amp outlet. An external high tem-
perature reset switch is located on the rear of the Oven so that
if temperatures exceed 350°C on the heater block, the external
reset will open and heat to the block will cease. This switch can
be reset by simply pushing in the button once the block has
cooled sufficiently. Two slo-blow fuses are mounted on the rear
of the Conditioning System, one for the main power and one for
the heater circuit. In addition a three inch fan enclosed on the
back side of the Conditioning System provides a steady flow of
air through the system to maintain the temperature of the
enclosed electronic components to an acceptable level. If the
case temperature exceeds 60°C, an internal switch will cut
power to the heater circuit.
Also located on the back of the Conditioning System is a
cooling rack. After the heated conditioning of the desorption
tubes and needles is complete, the desorption tubes and nee-
dles are removed from the oven and placed in the cooling rack.
As soon as the tubes are touchable ( 5 to 10 minutes), they are
immediately capped on both ends with the stainless steel caps
with PTFE seals that are available for the desorption tubes.
24 Tube Conditioning Oven*
Specifications
Electrical Specifications
Power Requirements
Voltage - 110 VAC, grounded
Current - 10 amp maximum
Fuse Sizes - 10 amp each
Temperature Controller
Heater Circuit, Accuracy ±0.1% of full scale reading
Temperature Range - up to 350°C
Input - Platinum Resistance Thermometer
Digital Readout - 3 or 4 digit
Programmable - Autocalibration temperature
0controller
Temperature protection circuitry for maximum
temperature and maximum case temperature
Gas / Flow Specifications
6 adjustable Flow bubble rotameters
Maximum pressure - 60 PSI
Quick disconnects for each gas line
Gases - either high purity helium or nitrogen
Weight and Dimensions
Weight - 20 pounds
Size - 9" wide x 9" deep x 13" high
Warrant
y
- 90 days parts and labor
Part No.
Description
24 Port Conditioning Oven, 6 rotameters,
programmable temperature controller, 6 - 4
port desorption tube manifold handles, 1 - 4
port needle manifold handle with graphite seals
4 Port Manifold Desorption Tube Handle
4 Port Manifold Needle
Graphite Seal with Metal Insert
S. S. Cap with .040" Hole
* Recommended for use with the AutoDesorb System
Conditions 24 Desorption
Tubes or Needles
Simultaneously
C19
Thermal Desorption Conditioning System
Scientific Instrument Services, Inc.
TM
FAX: 908-806-6631
www.sisweb.com/catalog/08/C19
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