PURPOSE: To make it possible to reduce labor inducing trial and error in the determination and adjustment of temp. compensating resistance required in usual, by rationally determining a temp. compensating resistance value only by operation.
CONSTITUTION: Pressure applied to a pressure sensor 1 is set to P=P1WP3 (P1< P3) and a temp. is set to T=T1WT3). The valve of detection resistance Ri (i=1W4) is measured in each case by setting the temp. in a measuring tank to T1 while changing the pressure therein in a range of P1WP3. In the next step, the temp. is set to T2 and the pressure is changed in a range of P1WP3 to measure each value. Subsequently, the change width of Rp2 is reduced as compared with that in the previous time and a drift amount is similarily calculated. By repeating this calculation, Rp for minimizing the absolute value of formula V0(T1,P2)-V0(T3,P2) (wherein V0 is output voltage) can be calculated. As mentioned above, a temp. compensating resistance value can be determined retaionally only by operation and labor inducing trial and error in the determination and adjustment of temp. compensating resistance performed in usual can be omitted.
OKADA KAZUHIRO
KATSUTA HIROHIKO
TANIGAWARA SHINJI
TAKIZAWA ISAO
