Parr Instrument 1901 User Manual

206M

1901 Oxygen Combustion Apparatus

Operating Instruction Manual

Scope

These instructions cover the steps to be taken in
setting up and operating the equipment furnished
with a Parr 1901 Oxygen Combustion Apparatus for
combustion procedures with a Parr 1108 Oxygen
Combustion Vessel. Although the 1108 is normally
used with this apparatus, the apparatus can be used
equally well with other Parr combustion vessels,
namely the:

• 1104 High Strength Oxygen Combustion Vessel
for explosives and fast- burning samples

• 1121 Large Oxygen Combustion Vessel (1850 mL)
for testing large, slow-burning samples.

Separate instruction sheets are provided for each
oxygen combustion vessel, as listed below. The user
should study all applicable instructions carefully be­fore starting to use this apparatus so that he will fully
understand the capabilities of the equipment and the
safety precautions to be observed in its operation.

Related Instructions

No. Description

205M Instructions for the 1108 Oxygen

Combustion Vessel

207M Analytical Methods for Oxygen Bombs
209M Instructions for the 1104 Oxygen Bomb
210M Instructions for the 1121 & 1122 Oxygen

Combustion Vessels

201M Limited Warranty

Note About Nomenclature:

Historically, burning a sample enclosed in a high
pressure oxygen environment is known as Oxy­gen Bomb Calorimetry and the vessel containing
the sample is known as an Oxygen Bomb. The
terms bomb and vessel are used interchangeably.

1901 Oxygen Bomb Apparatus

Assemble The Apparatus

Assemble the several parts of the apparatus on a ta­ble 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 termi­nals 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”.

• 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 deter­mine 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 fol­lows:

Part No. Description

110 8 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

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:

P

arr Instrument Company

211 53rd Street • Moline, Illinois 61265 USA 1-309-762-7716 • 1-800-872-7720 • Fax: [phone]

E-mail: [e-mail] • http://www.parrinst.com

Revision 05/13/13

Parr also offers “500 fi ring” bomb repair kits for rou­tine maintenance of the oxygen combustion bomb.
Please contact the sales staff at Parr for pricing infor­mation.