Calibration & Maintenence of benchtop pH meter

Calibration of Sper Scientific benchtop pH meter Model# 860033

[@samuelndungu7572]

thanks for this sir

[@kristenprice2900]

Shouldn't you calibrate the 7 solution first as the base? Or does it not matter for this meter?

[@marziehasadiaghbolaghi2453]

This pH meter is not user-friendly, is very hard and confusing to Calibrate!!!!!

[@fmcarajo666]

Please, help me!
¿Which buffer solutions did you use to calibrate pHmeter?, ¿What's their names?

[@kusiimaerisa5967]

how do i fix E3, E4 and E13

[@miminwaobi6254]

I'm currently trying to calibrate, it is not calibrating....what could be the problem

[@simonmburu2951]

How do I remove error code E4 and E3

[@yasinabdullahi4543]

Did you figure this out