parr 6400 - Gas and Communication Setup

Installation
2
14
Gas Connection
Make the connections to the oxygen supply at
this time using the A570DD Oxygen Regulator.
Refer to Figure 1-3. 1/8” O.D. nylon pressure hose
(HX0012TB024) is used to connect the oxygen supply.
The inlet connection incorporates a flow restrictor just
behind the inlet connection. When making the oxygen
connection, a back-up wrench should be placed on
the restrictor to insure a secure connection and to
prevent over tightening the flow restrictor. The deliv-
ery pressure for oxygen should be set to 3.0MPa (435
psig). To install the regulator, unscrew the protecting
cap from the tank and inspect the threads on the tank
outlet to be sure they are clean and in good condition.
Place the ball end of the regulator in the tank outlet
and draw up the union nut tightly, keeping the gages
tilted slightly back from an upright position. Open the
tank valve and check for leaks. The oxygen combus-
tion vessel must never be filled to more than 4.0 MPa
(600 psig or 40 bar).
Make the connections to the nitrogen supply at this
time. 1/4” O.D. nylon pressure hose (HJ0025TB035)
is used to connect the A812DD Nitrogen Regula-
tor to the A1589DD Rinse Tank. When making the
nitrogen connection, a back-up wrench should be
placed on the fitting to insure a secure connection
and to prevent over tightening the flow restrictor.
The delivery pressure for nitrogen should be set at
0.5 MPa (80psig or 5 bar). To install the regulator,
unscrew the protecting cap from the tank and in-
spect the threads on the tank outlet to be sure they
are clean and in good condition. Place the ball end
of the regulator in the tank outlet and draw up the
union nut tightly, keeping the gages tilted slightly
back from an upright position. Open the tank valve
and check for leaks.
Note: A hissing sound will occur while the rinse
tank is being pressurized. This is normal. Adjust the
pneumatic supply regulator to 80 psig as needed.
During extended periods of inactivity, close the tank
valve to prevent depleting the tank in the event of
a leak. Close the tank valve prior to removing the
regulator when changing tanks. Do not use oil or
combustible lubricants in connection with any part
of the oxygen filling system. Keep all threads, fit-
tings and gaskets clean and in good condition.
Note: To release the pressure inside the rinse
tank turn off the gas supply and open the gas
relief valve lever. Gas will exhaust through the
relief valve. Once the pressure has equalized
remove the lid to refill the rinse tank.
Combustion Vessel Exhaust Connections
The exhaust and vent connections at the rear
of the calorimeter, are made with the dual tube
A1006DD assembly. The end of the assembly with
the vessel exhaust diffuser should be placed into
the 10 liter carboy (231C2). The carboy should be
placed at or below the level of the calorimeter to
facilitate complete draining of these lines.
Alternatively:
The A1050DD Rinse Container Assembly is avail-
able as an accessory to the 6400 Calorimeter (see
Figure 13-17). This device allows for complete
and systematic recovery of the vessel combustion
products. These combustion products include the
initial line exhaust after the fill cycle and the por-
tion expelled during the vessel rinse cycle. The
Rinse Container Assembly is connected to the
rear of the calorimeter, in place of the portion of
the waste tube assembly that is connected to the
vessel exhaust fitting.
Combustion products are discharged from the
combustion vessel in two steps. The first step occurs
during the initial rapid release of the residual vessel
gases. The 1053DD bottle has sufficient strength and
volume to deal effectively with this sudden pressure
release. Gas is expelled from the four holes on the
perimeter of the 1052DD bottle cap, leaving any dis-
charged liquid in the bottle. As an additional safety
measure, the bottle is supported in a 1054DD acrylic
cylinder which serves to keep the bottle upright and
contained in the unlikely event the bottle ruptures.
At the end of the vessel exhaust step the aqueous
combustion products reside in the vessel, associated
tubing as well as the 1053DD bottle. The vessel rinse
step flushes these combustion products from the
vessel and the tubing into the 1053DD bottle. The
bottle can then be unscrewed from the assembly
and capped, until the sample is to be analyzed.
Some users find it useful to add the contents of the
rinsed combustion capsule to the washings collected
in the bottle.
Three 1053DD bottles are provided with the assem-
bly. Additional bottles may be ordered separately
from ynapmoC .