Maxi Doser not holding calibration?

[arking_mark]

So I'm having issues with my Maxi dosers. They are not holding their calibration at all. I calibrate the doser then immediately test it and get a different #s. I've calibrated by volume and weight. Please advise.

 

[arking_mark]

Just to be clear, I calibrated it 3 times in a row by weight:
1. 451.1g
2. 459.4g
3. 445.5g

So a ~1% ish difference. Is that about right for accuracy?

 

[Ditto]

How old is the maxi head on the doser?

 

[arking_mark]

How old is the maxi head on the doser?

About 1 year old.

 

[Member No 1]

When was the last time you replaced the hoses?

 

[Ditto]

@Member No 1 - is spot on, sounds like the tubing needs to be replaced. Any idea how many cycles you have done on it?

 

[arking_mark]

@Member No 1 - is spot on, sounds like the tubing needs to be replaced. Any idea how many cycles you have done on it?

I have never replaced the tubing. Maybe time to do that.