Apparatus for calibration of a moisture analyzer
OwnerPeter H. Ketelseninventor
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Abstract
The apparatus, with a disposable cartridge, is connected into the sample-input-line of the to be calibrated moisture analyzer. The cartridge contains a substance with previously determined, chemically bonded, moisture content. A motor-driven carriage with a heated section moves slowly along the cartridge, thereby heating a small portion of the cartridge up to a temperature causing the bonded moisture of the substance to release or liberate itself from the substance. The moisture is then carried with the gas sample into the to be calibrated analyzer and the moisture content in the cartridge may be compared with the moisture determination obtained by the analyzer. Moisture released from the substance at room temperature has been found negligible.
Claims1
A device for introducing a gaseous mixture of known moisture content into an analyzer for calibration purposes comprising a cartridge consisting of a tubular member and a wire longitudenally mounted within the tubular member, the wire being coated with a substance having chemically bonded moisture which is released when the substance is heated, means for connecting the cartridge to a source of gas at one end and to an analyzer at the other end, means mounting the cartridge and a carriage for movement along the length of the cartridge, heater means mounted on the carriage for heating a portion of the cartridge along its length and means for advancing the carriage along the length of the cartridge at a uniform speed.
Dependencies are inferred from the claim text.