Calibrating a digital PH meter

[gnesh69]

I recently purchased a digital PH meter. It is the ECO PH+.

It has a single calibration point of 7PH. Is there an easy way to get my hands on something to calibrate this device? Or do I need to order some calibration fluid?

Thanks

[Billybeau1]

Most of the pH monitoring units i've seen use a two point calibration.

If you only have one point then I would say yes, you need a calibration fluid.

Can this unit be calibrated ?

[bertoni]

LabSafety.com and many aquarium supply shops carry pH 7 calibration solution. Hopefully, the meter will also accept a pH 10 calibration solution.

[loudell]

Single point pH instruments are only accurate at the value you use to calibrate. The further away your tank measures from the point of calibration, the more error you will have. Your best bet is to use a 7 fluid. If you want to see how accurate <or inaccurate> the instrument is then put the probe into a 10 calibration fluid, after the 7 calibration, and see how close to 10 it reads.