swerner
Well-Known Member
I purchased The Hannah checker from my LHBS and I have to say I'm disappointed in its performance. I treated and calibrated according to the directions. First off the calibration is a manual calibration were you have to use a small screw driver to calibrate the 4.01 and the 7.01 range. This is where my problem begins. After calibrating, I'll clean off the bulb with distilled water and when I stick it back in the 4.01 buffer again it will be off by .1. I've used it on my last two brews and the meter never seems to stabilize. I used AJ's R/O primer and I'm trying to get fairly accurate readings but I just don't trust what I'm reading. Today My first reading @ 5min. was 5.31. The next reading @ 10min jumped up to 6.1. I let the samples cool to room temperature on every reading(about 72F). The rest of the reading flucuated between 5.3 and 5.4. I could never get any of the readings to stabilize where I was confident in any of the readings I got. Does any one else have this meter. I've read the sticky on meter calibration and I can't think of anything I'm doing wrong. Am I just expecting too much from an inexpensive meter.