My RCBS Range Master 750 Electronic Powder Scale went haywire

[DenStinett]

OK, so I'm weighing some Powder and my RCBS Range Master 750 Electronic Powder Scale locked-up
Didn't do anything out of the norm, but it now reads 02008
Will not zero, calibrate or reset in any way
I know it's an older Scale, but it's worked great up to now
Any ideas ?

[eastman]

I haven't used reloading scales, but an error code like that on most lab digitals can indicate load cell failure.

[DenStinett]

I haven't used reloading scales, but an error code like that on most lab digitals can indicate load cell failure.

Sounds like a new Scale is in my future 

[painter]

I haven't used reloading scales, but an error code like that on most lab digitals can indicate load cell failure.

Sounds like a new Scale is in my future 

Den, contact RCBS. Their warranty is second to none.

[Wobbly]

In my experience, a specific number like that is an "error code". You might be able to look it up, or you may need to call it in. But Painter is correct, RCBS has a fantastic warranty system, and the resolution might be a lot cheaper than you think.

I've bought used equipment off Ebay, which broke the next week, and RCBS sent me a brand new repair part. They are really proud of their customer base. Well, no matter what happens, we'd like to hear the end of this story. Keep us informed.

 

[DenStinett]

Will do Guys

Yeah, I have NEVER had a bad experience with RCBS and their Customer Service
Not once
" Yeah, we've had some issues with a few of those (fill-in the blank) .... we'll send you one that we know is OK "
Free replacement Parts
Fix or replace a jammed-up Die
You name it
Only cost "MAY BE" your shipping to them !
I tore the Base off of a 7.62X51mm NATO Case inside a Small Base Sizing Die
I took the De-Capper and Lock Ring off and sent them the Die Body
Once they received my bad Die, they sent me a brand-new one (FREE)
New De-Capper, Lock Rings and all
No questions
Not everybody will do that !

[painter]

I fried the power supply for my 750. It was my fault.

I called RCBS, and told them it was my fault. I just wanted to purchase a new one. The scale was purchased used, and was past the 2 year warranty. They sent me a new power supply for free.

[DenStinett]

No argument here
They have GREAT Customer Service
They've sent me all kinds of free (replacement) stuff:
De-Cap Pins
Extra Lock Ring .... With and without Set-Screws
And I LOVE these Spacer Rings:


I use them for several things while loading

[DenStinett]

OK; so here's the long and short of it
RCBS says it's waaaay out of warranty, so try the "Love Tap" :

"  During the use of electronic scales over the course of a day, you may notice your RangeMaster scale's readings begin drifting or not returning to zero.  This can be caused by changes in environmental conditions, especially temperature, and also residual stresses in the load cell from manufacturing.  First, verify that your unit has had sufficient time to warm-up (at least 20 minutes).  If you have been using your scale for more than an hour and noticed this behavior, try re-calibrating your scale, especially if you are outdoors or in an uncontrolled environment (garage, shop, etc. without air conditioning).  Otherwise, your load cell may need to be stress-relieved to eliminate these symptoms.  Normal use of the scale over time will break-in the load cell and cause these symptoms to stop, but could take hours of use.  Follow these steps to safely accelerate this 'break-in' period of the device and eliminate this problem:

Accelerated Break-In Procedure:

1.  Remove weights and pan from platen
2.  Press 'ZERO' button
3.  With your finger, tap the platen softly enough to barely cause the scale to overload (you will get an "OL" reading).  The amount of force required will be comparable to how hard you push on a computer keyboard when typing. 
   **Note** the scale is equipped with a mechanical stop on the load cell to prevent it from being over-stressed.  However, applying excessive force could still damage it.  Do not hit your scale with more than 8 ounces (250 grams) of force.
4.  Repeat this tapping 20-30 times. (You do not want to see OL)
5.  Allow your scale to stabilize.  If you have a non-zero reading, your scale did have residual stress in the load cell and should function better now.
6.  Recalibrate the scale and resume normal operation.
7.  If over time, you notice this behavior recurring, repeat these steps again as necessary.  "

Well, it didn't work
So I tore-off the "VOID" sticker and unscrewed the Face-plate
Lightly drug a Screwdriver across random Solder Joints; thinking maybe it needs to discharge static or any residual charge
Plugged it in and voila 0.0
Calibrated and working
Don't have a clue as to what it did, but the Scale works !
Thanks for all the input

[rckendall]

I love it! When you have nothing to lose, why not explore a little deeper? I just hope it keeps on for another lifetime.

Richard

[Wobbly]

So I tore-off the "VOID" sticker and unscrewed the Face-plate

Sounds like a StarTrek episode... "Beyond the Void"

 

[painter]

I love it when a plan comes together...

even when there was no plan.

[Dan_69GTX]

I love it when a plan comes together...

even when there was no plan.

When in competition I have a plan for the stage, then when the Neuralyzer makes that beeping sound.....now, what was I gonna do?!?

Neuralyzer - https://meninblack.fandom.com/wiki/Neuralyzer


Glad you got it working - don't forget to check accuracy with check weights!

[DenStinett]

Thanks for all the great ideas and tips