204M 1341 Plain Jacket Calorimeter Operating Instruction Manual
Table of Contents Preface 3 Discussion of Calculations 11 Scope 3 Acid Correction 11 Related Instructions 3 Sulfur Correction 11 Important Information 3 Fuse Wire Correction 11 Intended Usage 3 Radiation Correction 11 Explanation of Symbols 4 Magnitude of Errors 12 Safety Information 4 General Specifications 4 Maintenance 12 Environmental Conditions 4 Provisions for Lifting and Carrying 4 Calorimeter Maintenance 12 General Cleaning Inst
1341 Plain Jacket Calorimeter Preface Scope These instructions cover the steps to be taken in setting up and operating a Parr 1341 Plain Jacket Calorimeter. The user should study these instructions carefully before starting to use the calorimeter so that they will fully understand the capabilities of the equipment, and be well aware of the safety precautions to be observed in its operation.
1341 Plain Jacket Calorimeter Explanation of Symbols This CAUTION symbol may be present on the Product Instrumentation and literature. If present on the product, the user must consult the appropriate part of the accompanying product literature for more information. Protective Earth (PE) terminal. Provided for connection of the Protective Earth (green or green/yellow) supply system conductor. Safety Information To avoid electrical shock, always: 1.
1341 Plain Jacket Calorimeter Assemble the Calorimeter 1. Unpack the calorimeter carefully and check the individual parts against the packing list. If shipping damage is discovered, report it immediately to the delivering carrier. Unpack the jacket first and set it on a sturdy bench or table in a location that is reasonably free from drafts and is protected from sources of radiant heat, preferably in an air conditioned room. Temperature changes in the room should be minimal.
1341 Plain Jacket Calorimeter Operating the Calorimeter All operations required to test a sample or to standardize the 1341 Plain Jacket Calorimeter should proceed step-wise in the following manner: 1. Prepare the sample and charge the oxygen combustion vessel as described in Instruction Manual No. 205M. 2. Fill the calorimeter bucket by first taring the dry bucket on a solution or trip balance; then add 2000(+/-0.5) grams of water.
1341 Plain Jacket Calorimeter Graph displaying typical temperature rise curve 11. After the last temperature reading, stop the motor, remove the belt and lift the cover from the calorimeter. Wipe the thermistor shaft and stirrer with a clean cloth and set the cover on the A37A support stand. Lift the bomb out of the bucket; remove the ignition leads and wipe the bomb with a clean towel. 12. Open the knurled knob on the bomb head to release the gas pressure before attempting to remove the cap.
1341 Plain Jacket Calorimeter Calculating the Heat of Combustion Assembly of Data The following data should be available at the completion of a test in a 1341 calorimeter: a b ta = time of firing time (to nearest 0.1 min.
1341 Plain Jacket Calorimeter Gross Heat of Combustion Conversion to Other Bases Compute the gross heat of combustion, Hg, in calories per gram by substituting in the following equation: The calculations described above give the calorific value of the sample with moisture as it existed when the sample was weighed. For example, if an air-dried coal sample was tested, the results will be in terms of heat units per weight of air-dry sample.
1341 Plain Jacket Calorimeter Standardizing the Calorimeter The Energy Equivalent Factor The term “standardization” as used here denotes the operation of the calorimeter with a standard sample from which the energy equivalent or effective heat capacity for the system can be determined. The energy equivalent factor (W) represents the energy required to raise the temperature of the calorimeter one degree, usually expressed as calories per degree Celsius.
1341 Plain Jacket Calorimeter Discussion of Calculations Acid Correction Since combustion in the bomb takes place in an atmosphere of nearly pure oxygen at high temperature and pressure, several reactions take place which would not occur in burning the same material under normal atmospheric conditions. These side reactions are important because they generate an appreciable amount of heat which cannot be credited to the sample, and for which a correction must be made.
1341 Plain Jacket Calorimeter Magnitude of Errors General Cleaning Instructions The following examples illustrate the magnitude of errors which may result from faulty calorimeter operations. They are based upon an assumed test in which a 1.0000 gram sample produced a 2.800 ºC temperature rise in a calorimeter having an energy equivalent of 2400 calories per °C. Wipe exterior surfaces with lightly dampened cloth containing mild soap solution.
41 Plain Jacket Calorimeter 6772 Calorimetric Thermometer To improve the precision and simplify the procedure for measuring and recording the temperature rise in a 1341 Calorimeter, Parr offers the 6772 Calorimetric Thermometer. Readings are taken with a thermistor sealed in a stainless steel probe. This two-channel precision calorimetric thermometer features Parr’s newest generation microprocessor control.
1341 Plain Jacket Calorimeter Electrical Hookup of 6772 Calorimetric Thermometer to 1341 Calorimeter 14 Parr Instrument Company
1341 Plain Jacket Calorimeter Parts for the 1341 Calorimeter Key No. 1 2 3 4 5 6 7 8 9 10 11 12 Part No.
204M R09 05/27/14
