dphil
Newbie level 2
phmeter
I have been stuck with a problem in my pHmeter expt for almost a month. I searched the net and found many pH circuits and tried many but none are working.I have attached my circuit diagram with this.The problems I face are-1)There is lot of 'noise' present in the output of the TL081. Even if I touch the BNC of the electrode noise can be seen in CRO, 2)The voltage values don't seem to be constant. It keeps on changing with time. If for acid to base I get 800mV change,at the next instant I get 400mV change. What can I possibly do to make my project working??
I have been stuck with a problem in my pHmeter expt for almost a month. I searched the net and found many pH circuits and tried many but none are working.I have attached my circuit diagram with this.The problems I face are-1)There is lot of 'noise' present in the output of the TL081. Even if I touch the BNC of the electrode noise can be seen in CRO, 2)The voltage values don't seem to be constant. It keeps on changing with time. If for acid to base I get 800mV change,at the next instant I get 400mV change. What can I possibly do to make my project working??