K88990 Automatic Calorimeter

Description

Test Method

Heat of combustion is determined in this test method by burning a weighed sample in an oxygen pressure vessel calorimeter under controlled conditions. The heat of combustion is computed from temperature observations before, during and after combustion with proper allowances for thermochemical and heat transfer corrections. Either isothermal or adiabatic calorimeter jackets can be used.

Features

Isoperibol Calorimetry

Removable Oxygen Pressure Vessel and Bucket 4-6 tests per hour (6 tests requires 2nd vessel and bucket)

Operator time per test is approximately 6 minutes

0.1% RSD Precision Class Instrument

Accuracy:6318±19 cal/g for single analysis of standard

SD Memory and Ethernet Network Communications

Description

The K88990 features a removable pressure vessel and bucket design. It can achieve the highest level of precision and accuracy of any oxygen pressure vessel calorimeter. It is a good choice for high precision quality control work and for research and development. Multiple pressure vessel choices are also available, expanding its functionality for higher energy releases An isoperibol calorimeter is one where the surrounding jacket is maintained at a constant temperature while the temperature of the pressure vessel and bucket rise as heat is released by the combustion. The K88900 and K88990 Calorimeters are true isoperibol calorimeters. In these implementations, a controlled temperature jacket, completely surrounds the combustion pressure vessel and its “bucket”. A microprocessor-based controller monitors both the temperature of the bucket and the jacket and performs the necessary heat leak corrections that result from differences in these two temperatures. These corrections are applied continuously in real-time throughout the test rather than as a final correction based on pre and post test measurements. Removable pressure vessel calorimeters are the more traditional design most users will recognize. In this design the oxygen pressure vessel and bucket are removed from the calorimeter for loading the sample and filling the bucket with the carefully measured amount of water which absorbs the energy released in the combustion.

Included Accessories

Oxygen Pressure Vessel, Alloy 20

Oxygen Regulator

Calibration Standards, Range: 5000-8000 Calorie

Maintenance Kit for Pressure Vessel Repair