Despatch RBC1-50 with Protocol Plus - Manual (Page 32)

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Replacement
Parts
To order or return parts, contact the Service Products Division at Despatch. The
Service Products Division features our Response Center for customer service. When
returning parts, a Despatch representative will provide you with an MRA (Material
Return Authorization) number. The MRA number must be attached to the returned part
for identification. When you are ordering parts, be sure to give the model number, serial
number and the part number. This will expedite the process of obtaining a replacement
part.
When you have a
service need, contact the Response Center at 1-800-473-7373: FAX
612-781-5353.
Nitrogen and Liquid Nitrogen
The standard air-atmosphere oven can be converted to a nitrogen-atmosphere with a
factory installable kit. The following are instructions on the operation of the nitrogen
(N
2
) and liquid nitrogen (LN
2
) cooling option for the RBC1-50 Burn-In oven.
Theory of Operation
The nitrogen atmosphere option uses nitrogen (N
2
) to displace oxygen from the
chamber, thus eliminating oxidation of components. The heat is dissipated from the
oven by liquid nitrogen (LN
2
). Nitrogen enters the chamber and reduces the oxygen
level to the desired level. The flowmeter keeps the desired N
2
entering into the
chamber, maintaining a low concentration of oxygen while a burn-in cycle is in progress.
WARNING:
Disconnect the main power switch
or power cord before attempting
any repair or adjustment.