Parr Instrument 6200 - Manual (Page 26)

27
6200
Calorimeter Operating Instruction Manual
Operating
the Filling
Connection
Detailed Instructions for
preparing the sample and charging
the 1108 Oxygen Bomb are given
in Operating Instructions No.
205M. Follow these instructions carefully,
giving particular attention to the precautions
to be observed in charging and handling the
bomb.
To fill the bomb, connect the
hose to the bomb inlet valve and
push the O2 button on the
calorimeter control panel. The calorimeter
will then fill the bomb to the preset pressure
and release the residual pressure in the
connecting hose at the end of the filling
cycle. It will take approximately 60 seconds
to fill the bomb. During this time a
countdown timer on the O2 fill button will
display the remaining fill time. Pushing the
O2 key a second time will stop the flow of
oxygen at any time. Once the display
returns to its normal reading, the user can
disconnect the coupling and proceed with
the combustion test.
If the charging cycle should be started
inadvertently, it can be stopped immediately
by pushing the O2 fill key a second time.
During extended periods of inactivity,
overnight or longer, close the tank valve to
prevent leakage. When changing oxygen
tanks, close the tank valve and push the O2
FILL key to exhaust the system. Do not use
oil or combustible lubricants on this filling
system or on any devices handling oxygen
under pressure. Keep all threads, fittings,
and gaskets clean and in good condition.
Replace the two 394HCJE O-rings in the
slip connector if the connector fails to
maintain a tight seal on the bomb inlet
valve.
The recommended filling pressure is 450
psig (3 MPa or 30 bar). This pressure is
prescribed by most of the standard bomb
calorimetric test methods. Higher or lower
filling pressures can be used, but the bomb
must never be filled to more than 600 psig
(40 atm).
5 OPERATING INSTRUCTIONS
Operating the
1108 Oxygen
Bomb
5-1