Parr Instrument 1901 - Manual (Page 2)

1901 Oxygen Bomb Apparatus
Assemble The Apparatus
Assemble the several parts of the apparatus on a ta-
ble or bench with convenient access to cold running
water, a drain and to an electric outlet. About 8 sq.
ft. of work space will be required. Other necessary
accessories include a chemical balance sensitive to
0.1 mg and a tank of oxygen. A standard 1A cylinder
with a purity of 99.5% is usually suffi cient for bomb
combustion purposes.
The Oxygen Filling Connection
Unscrew the protecting cap from the oxygen tank
and inspect the threads on the valve outlet to be
sure they are clean and in good condition. Place the
ball end of the 1825 Oxygen Filling Connection into
the outlet socket and draw up the union nut tightly
with a wrench keeping the 0-55 atm. gage in an
upright position. Operating instructions for the 1825
oxygen connection are provided in Instruction Sheet
205M for the 1108 oxygen combustion vessel.
The Water Bath
Fill the water bath with enough water to completely
submerge the oxygen bomb.
The Ignition System
The 2901 ignition unit operates from a 115v or 230v,
50 or 60 Hz line to provide the proper low voltage
current for igniting the fuse wire in the oxygen
bomb. After the unit has been connected to an
outlet, do not press the fi ring button unless the lead
wires are connected to the bomb. If the bare termi-
nals on the wire happen to be in contact with each
other when the circuit is closed, the short circuit
could damage the unit. Connect one of the lead
wires from the 1108 vessel to the terminal labeled
“10cm”. Connect the second lead to the terminal
labeled “common”.
Operating The 1108 Oxygen Combustion Vessel
Complete instructions for operating the 1108 Oxygen
Combustion Vessel are provided in a separate set
of instructions, No. 205M. Study these instructions
carefully before starting to use the 1108 vessel since
they contain essential information covering:
• Precautions to be observed in oxygen bomb
combustions
• Instructions for preparing the charge and filling
the bomb with oxygen.
• Instructions for firing the bomb and recovering
the combustion products.
• Bomb maintenance and safety instructions.
Analyzing The Bomb Washings
Methods for analyzing the bomb washings to deter-
mine sulfur and other elements in the combustion
sample are provided in Instruction Sheet No. 207M.
Procedures for determining trace elements in coal
using a quartz liner in the 1108 vessel are included
in this material, also an extensive bibliography of
oxygen bomb methods.
Replacement Parts
Individual parts and operating supplies for the 1901
Oxygen Combustion Apparatus are identifi ed as fol-
lows:
Part No. Description
1108 Oxygen combustion vessel
1825 Oxygen fi lling connection
2901EB Ignition unit, 115 v. 50/60 Hz
2901EE Ignition unit, 230 v. 50/60 Hz
A468E Ignition wire (2 per pk)
A387A Water bath, 8 qt. (7.5L)
A38A Bomb head support stand
421A Bomb lifter
43AS Combustion capsule, stainless steel
45C10 Fuse wire, 10 cm card
3601 Gelatin capsules, size 00, bottle of 100
Parr also offers “500 fi ring” bomb repair kits for rou-
tine maintenance of the oxygen combustion bomb.
Please contact the sales staff at Parr for pricing infor-
mation.
P arr I nstrument C ompany
211 53rd Street • Moline, Illinois 61265 USA 1-309-762-7716 • 1-800-872-7720 • Fax: 1-309-762-9453
E-mail: [email protected] • http://www.parrinst.com
Revision 05/13/13