Fx120i Weight Change after warm up?

[Ccrider]

I recently discovered that my scale climbs approximately .1gr to .2gr after warming up. I suppose this is normal.

I just wonder if this weight change is linear and continues, the longer you leave the scale on.

Never really thought about using a check weight or calibrating the scale. I guess I need to start using a check weight.

 

[Turbulent Turtle]

I have never had mine change after the 30 minute warmup as directed in the manual on page 9.

 

[T-shooter]

The scale should not change after it warms up. I usually turn mine on an hour before I want to use it. Unless it has been moved or became un-level, or the conditions makes a substantial change, such as the barometer or temperature, the readings should be constant. After warming up, it it consistent?

 

[dcali]

I've found that following the instructions has led to flawless operation of my FX-120i. Not sure why so many seem to have issues. Let it warm up. Level it. Calibrate it. Keep it away from vibration and air currents. You're good to go.

 

[R.Morehouse]

I've found that following the instructions has led to flawless operation of my FX-120i. Not sure why so many seem to have issues. Let it warm up. Level it. Calibrate it. Keep it away from vibration and air currents. You're good to go.

...........DITTO 110%.............

 

[Ccrider]

@T-shooter, I assume it is consistent after warming up. I have not checked it against other scales.

@R.Morehouse, how do you ‘calibrate’ it?

 

[Twoboxer]

@T-shooter, I assume it is consistent after warming up. I have not checked it against other scales.

@R.Morehouse, how do you ‘calibrate’ it?

Read the manual for the procedure. It's simple. If you don't have a manual, https://www.aandd.jp/products/manual/balances/fz_fx-i.pdf

 

[R.Morehouse]

I check mine with a 125g test weight I got from Scott Parker with one of his tuned M-5's that I use to check on the FX-120........Yeah, I'm one of them...

Have not had to calibrate at all since purchase....

Rick

 

[RampedRaptor]

Never turn mine off.

 

[dcali]

@R.Morehouse, how do you ‘calibrate’ it?

Get a 100g “test weight” from McMaster Carr. The cheap ones will do for our purposes. The instructions are in the manual.

 

[ngb1787]

If anyone ever reads the manual on the a&d it states that you should hit the rezero button every time you finish weighing each charge. I know none of us do this, but,,,,,

 

[Turbulent Turtle]

If anyone ever reads the manual on the a&d it states that you should hit the recalibrate button every time you finish weighing each charge. I know none of us do this, but,,,,,

Recalibrate? Are you sure about that?

 

[ngb1787]

Recalibrate? Are you sure about that?

Re zero, sorry

 

[Ccrider]

Read the manual for the procedure. It's simple. If you don't have a manual, https://www.aandd.jp/products/manual/balances/fz_fx-i.pdf

Thanks

 

[David101]

When weighing to this level of precision there are a lot of factors that can influence the result and temperatures are on of those. its not just the temp of the scales inner workings but also the temperatures of things like the pan in our case or the test weights. The ideal situation is to have all the components to be used and weighed at the same temp.

What can happen when the object to be weighed is different it can cause slight movements in the air that will influence the displayed value. This is discussed I think in the instruction book, if not there are plenty of reference guides out there.

 

[SGK]

The scale re-zeros itself automatically. Only if the deviation is rather large does this not occur. This is a key benefit of the scale. So you only have to 'worry' about drift in the very short time it takes to drop and trickle a charge i.e. over a few seconds only. In this case it is minimal if any.

EDIT: just to clarify this. This is the zero tracking/trc function. It works when the scale is sitting with a zero reading. The zero drift is constantly updated/corrected. So if you place your powder cup (or whatever) on the scale, hit zero and then leave it there the scale will automatically correct for zero drift. When you lift the powder cup off, to pour the charge, and then return it to the scale any small drift during that time is corrected to zero. (If it is large, perhaps because you left the cup off the scale for an extended period of time, you will need to manually re-zero.) You do not need to re-zero when you are already at zero.