Despatch RBC1-50 with Protocol Plus - Manual (Page 33)

29
Operator Training Requirements
Users and operators of this oven must comply
with operating procedures and training of
operating personnel as required by the
Occupational Safety and Health Act (OSHA)
of 1970, Section 5 and relevant safety
standards, and other safety rules and
regulations of state and local governments.
Refer to the relevant safety standards in
OSHA and National Fire Protection
Association (NFPA), Section 86 of 1990.
Operation
1.
Connect the nitrogen (N
2
) supply line to the
inlet located in the rear of the oven.
2.
Set the pressure regulator to 40PSIG.
3.
Connect the liquid nitrogen (LN
2
) supply to the inlet located on the box in the rear
of the oven.
4.
Adjust the regulator to 35PSIG max.
5.
Check nitrogen plumbing for leaks, using
soapy water solution.
6.
As gas nitrogen is odorless, all leaks should
be stopped to prevent the possibility of
suffocation in a small work area in which a
nitrogen leak might displace much of the oxygen in the atmosphere.
7.
Start chamber, and turn the Nitrogen (N
2
) switch ON.
8.
The pilot light on the switch indicates that the solenoid valve is open and nitrogen
(N
2
) is entering the chamber.
9.
Adjust the flowmeter, which is located in the front control panel, and set to
desired flow rate. The flow rate should set so that it creates a slightly positive
pressure in the chamber, which counteracts leaks and keeps the oxygen content
at a safe, low level of concentration.
10.
When the oven nears temperature set on the control, the heater will start cycling
on and off.
WARNING:
Suffocation can occur in a nitrogen
atmosphere oven chamber if it is not
thoroughly purged with room air
before a person goes inside it.
Before entering an oven chamber,
run the oven for at least five minutes
with the nitrogen (or any other inert)
gas turned off, doors open and
recirculating fan running. Only then
should a person work inside the oven
chamber with the doors closed.
WARNING:
Do not use oven in wet, corrosive
or explosive atmospheres.
CAUTION:
Nitrogen & carbon dioxide
gases can cause asphyxiation if
used in confined or poorly
ventilated areas.