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Posted: 8/18/2017 8:01:48 PM EDT
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So, am I crazy, or is this normal?
Have gempro 250, calibrated it with the 20g weight that came with it. no fluorescent lights in room (only led), table is sturdy, scale is level. Put on m855A1 projectile. 62.20gn Remove projectile. 0.00gn cool right? Put same exact projectile on scale. 62.1gn o...kay.... Remove projectile. 0.35gn Put same exact projectile on scale. 62.5gn Remove projectile. 0.00gn Put same exact projectile on scale. 61.75gn Remove projectile. 2.90gn Put same exact projectile on scale. 63.90gn And this is all assuming I place projectile dead center on scale, standing straight up. God forbid it lay on its side or be off center, then there are +/- 5gn differences. |
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Quoted:
I've not had any issues with mine. You have to be careful to follow the calibration instructions. Make sure you calibrate with nothing on the scale plate(make sure the metal piece isn't on it). reweighed a projectile, without the metal cover this time. still fucked 62.90 3.00 64.40 2.85 63.90 3.55 64.45 If yours isn't having problems, then this isnt normal and I'll send it off to the manufacturer. |
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recalibrated again, without the metal cover. reweighed a projectile, without the metal cover this time. still fucked 62.90 3.00 64.40 2.85 63.90 3.55 64.45 If yours isn't having problems, then this isnt normal and I'll send it off to the manufacturer. Quoted:
Quoted:
I've not had any issues with mine. You have to be careful to follow the calibration instructions. Make sure you calibrate with nothing on the scale plate(make sure the metal piece isn't on it). reweighed a projectile, without the metal cover this time. still fucked 62.90 3.00 64.40 2.85 63.90 3.55 64.45 If yours isn't having problems, then this isnt normal and I'll send it off to the manufacturer. |
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Warmed up for how long?
Incandescent light shining directly on it (heat)? Does the scale flutter when you put your hand near it (not the breeze, but static electricity)? Also remove your cell phone from the area . . . and turn off/remove anything else you can think of that transmits. You may have a classic case of the flutters there. |
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Warmed up for how long? Incandescent light shining directly on it (heat)? Does the scale flutter when you put your hand near it (not the breeze, but static electricity)? Also remove your cell phone from the area . . . and turn off/remove anything else you can think of that transmits. You may have a classic case of the flutters there. leaving it on all night and will try again tomorrow. no incandescent lights at all, only LED lights. 3x led wraparound lights on ceiling to be specific. cell phone was in another room since the 2nd tests. even tried putting it on battery power, and taking it to another room (bathroom 20 feet away) I will check to see if my moving hand does anything, but previously I've had it zeroed and waved my phone around it and it didn't change. the only thing I've noticed is that it takes forever to zero out. i.e. I would TARE, and it would 0.00, then a moment later go to -0.10, TARE, 0.05, rinse, repeat 10+ times til it finally stays at 0. I don't necessarily expect it to be perfect, and minor changes are acceptable if it is as sensitive as it claims, but a 4 grain difference on the same projectile is a bit much. |
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Sorry to say, but with this small sampling of people saying "Mine did it too, but I sent it back and the new one works fine.".... This small of a sampling, and this many people having the same issue does not bode well for their quality. |
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Any air movement in the room, including A/C vents? thing is still playing fuck fuck games this morning. sigh. At least I'm not alone. But on the plus side, after being on for 10 hours, it is really fast at coming to the wrong weight. no more 5 second waits. heh |
| Mine does the sale thing, and pushing the tare button doesn't help steady it either. I just reboot mine and check loads against it using RCBS 505 scale, seems to work. I've tried everything, leaving it on for days, no air circulation in the room, ect. I keep using it because I'm stubborn I guess, plus I'm not willing to spend a bunch more money for a better scale. |
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Yeah op you might just need another one. I had one and it worked great for about 1-2 months then one day I turn it on and the display lit up but the numbers didn't. So it was just blank orange.
Had to send it back and get another. My second one works pretty good but not perfect but I'm still getting by with it. |
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update: manufacturer sent a new scale and it arrived today. plugged in, calibrated, and the thing returns perfectly to zero. holy fuck. it's a miracle!
tossed a m855a1 on there, 61.92gn, all 3 times I measured. even without having it acclimated to my gunroom temperature, or being powered on for more than 20 seconds. Definitely pleased. thanks guys |
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I too had a "bad" one at first. I don't know what the deal is with them, but my second one has been perfect.
I like to keep mine powered so it stays "warmed up," but that's been an issue lately because of storm related power issues. I may have a spare UPS sitting around... And I am going to put a ferrite choke on the DC power line to avoid all those "cell phone/florescent light/whatever" issues. |
| Mine, 5 years old, started acting up that way a couple months ago. Could not figure out what was wrong and was just about to send it in. Then I tried replacing the batteries-- even though it always runs on AC. New batteries and it works fine again. There must be some sort of battery power thing going on even while on AC. |
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Mine, 5 years old, started acting up that way a couple months ago. Could not figure out what was wrong and was just about to send it in. Then I tried replacing the batteries-- even though it always runs on AC. New batteries and it works fine again. There must be some sort of battery power thing going on even while on AC. |
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Mine, 5 years old, started acting up that way a couple months ago. Could not figure out what was wrong and was just about to send it in. Then I tried replacing the batteries-- even though it always runs on AC. New batteries and it works fine again. There must be some sort of battery power thing going on even while on AC. If you have one or more shorted cells, it can cause the power supply to operate at a very low voltage. I suppose it could even prevent operation if it was a very low impedance short in all cells. |
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