Recommendations for a vacum tube tester

The reason I asked is that the number listed on the Hickok chart does not appear to be the min and I read it was what an average new tube should test at and I wanted to verify that with experienced Hickok testers. An example…the 12at7 is listed at 4000 on the chart which is in the middle of good on the meter and replace begins at 2600 (65%) on the meter, 12au7 is listed at 2200 and replace begins at 1300 (60%). 12ax7 is listed at 1250 and is too low to follow the gm meter good/replace readings and needs to use the good-bad test by adjusting the english down.

@tksteingraber I would go with what the chart says. I've never seen a tester that showed a range. I own several and have had about 20 in my time; never seen a tester that showed results as you describe. But I've seen plenty of testers that had meters with 'replace' and '?'... by your description, it sounds as if someone replaced the meter on your tester. By 'english' do you mean 'bias'?

@atmasphere thanks again for input.  The tester is stock orig meter.  English (sometimes referred to as shunt) is a setting in addition to bias.  See picture link below.
 

https://imgpile.com/i/hA5mJ8

@tksteingraber Usually when there are multiple scales for umhOs, there is a switch to go along with it. So this particular example is puzzling. Unless the meter was replaced at some point. I've used a tester like this, but the last time I saw one was about 23 years ago... As I recall though, it worked pretty well.

@atmasphere Yes the english setting dial has three settings(red dots) one for each of the 3 scales to measure and compare against the chart listing. 0-3000, 3001-6000, 6000+

+1