firebrand18rjr
Well-Known Member
I recently bought this ph tester from this guy
pH Meter Digital Hydroponics LED Aeroponics - eBay (item 320221599509 end time Mar-05-08 12:08:18 PST)
i used the buffer solutions and calibrated it to the 6.8 ph level and the 4.0 level . when i calibrate to the 6.8level and get it adjusted right and then turn around and pour the 4.0 ph solution in a seperate cup and adjust it to the 4.0 level and then test it back in the 6.8 buffer solution the reading is off. any help?
pH Meter Digital Hydroponics LED Aeroponics - eBay (item 320221599509 end time Mar-05-08 12:08:18 PST)
i used the buffer solutions and calibrated it to the 6.8 ph level and the 4.0 level . when i calibrate to the 6.8level and get it adjusted right and then turn around and pour the 4.0 ph solution in a seperate cup and adjust it to the 4.0 level and then test it back in the 6.8 buffer solution the reading is off. any help?