| 摘要 |
PURPOSE:To enable an automatically recording analysis with a high accuracy by compensating for the temperature difference between the standard sample and a sample immediately after the change in the furnace temperature starts with a servo mechanism only while the temperature changes sharply to prevent missing of observation record due to changes in the zero point. CONSTITUTION:A sample 2 and the standard sample 3 are arranged side by side in a furnace 1 whose temperature rises or lowers linearly and contacts 4 and 5 of a differential thermocouple are bonded on the samples 2 and 3. The temperature difference between the samples 2 and 3 is computed with a differential amplifier 8 through these contacts 4 and 5 and the temperature of the sample 2 via an amplifier 13 is measured with an automatic recorder 10 with the base line based on the temperature difference as zero to perform an analysis on the sample 2. In this case, with a switch 20 closed as controlled with a timer 21, a potentiometer 16 is controlled through a servo motor 19 to allow a servo compensation for the temperature difference while the furnace temperature changes sharply after the start of rise or the like thereof and the amplifier 8 is fixed to the compensated value after the temperature difference is stabilized. This prevents missing of record at the observation part due to variations in the base line thereby enabling a automatically recording analysis with a high accuracy. |
