Hey everybody! I have an Eco Testr pH2, I got it in February, had to replace the batteries around April or May. Since I have had it I have been curious about if it is actually working or not. This morning when I calibrated my meter, I placed it in a shot glass of 7.0 solution and it was a tad off so I calibrated it such that it showed "7.0". For my 4.0 solution it was showing 4.7 and when I tried to press "cal" the meter blinked "5.3" for a while then "Err" and back to displaying 4.7. I reset the meter to its default settings and is now reading "7.1" for the 7.0 and is still giving me "5.3" for my 4.0 solution. I keep getting the same error when I try to calibrate. I hit "cal" it blinks "5.3" for about 30 sec, then gives me the error message "Err". I would hate to have to buy a new meter, these damn things are expensive! If anyone has any opinions for my poor meter (and poorer plants) let me know. Thanks!
Just get a new meter? Why try to fix something thats obviously broken and could hender your beautiful ladies with false reading.
This exact thing happened to my BlueLab. Unless the meter can get with in a certain point of the desired number, in your case 4, you'll get an err. You can get cheap ones off ebay for like $10. I keep one as a backup at all times