Baz
Well-Known Member
Ok got the ph tester, got the solutions 7 and 4, following these stupid instructions to calibrate....
1. immerse the electrode in pH 6.86 under the temperature of 25 c standard buffer solution of phosphate, and gently shake electrode
2. regulate the timmer with a screwdriver until the buffer solution value corresponnding to the measurement temperature is obtained
3.immerse the electrode in pH4.01 or pH9.18 the standard buffer solution of borax
4. after about one minute, until the bufer solution value corresponding to the measurement temperature is obtained
the problem is when i follow step 1 and emerse it a solution of 7, the digtal display is jumping up and down, and not settling on 7.0 no matter what i do with the little screw, anyone know what im doing wrong as this pH testing is seriusly doing my head in
1. immerse the electrode in pH 6.86 under the temperature of 25 c standard buffer solution of phosphate, and gently shake electrode
2. regulate the timmer with a screwdriver until the buffer solution value corresponnding to the measurement temperature is obtained
3.immerse the electrode in pH4.01 or pH9.18 the standard buffer solution of borax
4. after about one minute, until the bufer solution value corresponding to the measurement temperature is obtained
the problem is when i follow step 1 and emerse it a solution of 7, the digtal display is jumping up and down, and not settling on 7.0 no matter what i do with the little screw, anyone know what im doing wrong as this pH testing is seriusly doing my head in
