SWF pH Meter ?

[mterrace]

When I bought the pH meter from SWF, I calibrated it with pH7 and pH4 solution....I want to re-calibrate it, but can't find the manual --- Does anyone know which screw (potentiometer) is for pH7, and which one is for pH4?
Does anyone know the manufacturer of this pH meter?
https://www.saltwaterfish.com/site_11...ot_parent_id=6
Thanks,
Mark

 

[larryndana]

i believe you use the screw on the back to adjust it. i've got the same one.

 

[mterrace]

Originally Posted by larryndana
i believe you use the screw on the back to adjust it. i've got the same one.

I thought i originally used the one in the back for pH4 and the one near the batteries for pH7 -- But I can't seem to get it calibrated now...
I tried the one in the back for pH7 and the one near the batteries for pH4 and still can't get it quite there....Best I can do is 3.9 and 7.1.....so close....I have been using it everyday for the last 6 weeks...maybe I wore it out

 

[imfsub12]

Is this better to get than the test KITS.. Solutions?
i mean more bank for your buck?

 

[larryndana]

i only used the one on the back, i'll have to get the instuctions out and see....tomorrow.
and, i bought one to see if its better than regular tests. so far so good.

 

[mterrace]

Originally Posted by imfsub12
Is this better to get than the test KITS.. Solutions?
i mean more bank for your buck?
I loved it! It was so much easier than trying to figure out the colors....and I have three test kits and they always seem to come up with different values...8.2...8.4....So the digital readout was steady and I was more comfortable...
Now that I can't calibrate it, I am nervous of the accuracy....Just ordered a PinPoint pH monitor - so I'll let you know how that one works -- the difference with the PinPoint, is that the probe stays in the tank all the time.
Mark