sensitivity is 50 cm. H2O. Higher sensitivities can be achieved but stability considerations make it impractical. The error due to non-linearity is less than 5% of fullscale value. If it is required to measure pressures greater than 150 cm. H20 it is necessary to increase the thickness of the diaphragm in order to retain linearity. TEMPERATURE CHARACTERISTIC - Considerable care is needed in order to get a pill which is stable in a changing temperature environment. A temperature- sensitive reactance is not used in X/ the present circuit. Fortunately PILL the change in frequency due to M 8 component variations, particularly in the transistor, causes the frequency to decrease whereas the air which is contained within the pill expands with increase in temperature causing the frequency to increase; by adjusting the gap in the pot core it is usually possible to balance out the two effects. The differing temperature BATTERY VOLTAGEA - FIG. 6. Frequency drift with change in battery voltage. -Q- 126 kcls/cm. Hg -E- 1J09 kc/s/cm. Hg
sensitivity is 50 cm. H2O. Higher sensitivities can be achieved but stability considerations make it impractical. The error due to non-linearity is less than 5% of fullscale value. If it is required to measure pressures greater than 150 cm. H20 it is necessary to increase the thickness of the diaphragm in order to retain linearity. TEMPERATURE CHARACTERISTIC - Considerable care is needed in order to get a pill which is stable in a changing temperature environment. A temperature- sensitive reactance is not used in X/ the present circuit. Fortunately PILL the change in frequency due to M 8 component variations, particularly in the transistor, causes the frequency to decrease whereas the air which is contained within the pill expands with increase in temperature causing the frequency to increase; by adjusting the gap in the pot core it is usually possible to balance out the two effects. The differing temperature BATTERY VOLTAGEA - FIG. 6. Frequency drift with change in battery voltage. -Q- 126 kcls/cm. Hg -E- 1J09 kc/s/cm. Hg
86344498-Microelectronic-Pill.docx