Park Tool DS-1 Digital scale discrepancies...

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octave
Posts: 188
Joined: Sun Jan 15, 2017 8:47 pm

by octave

so i have a park tool digital scale (the DS-1), and i always used to just hold it stead in my two hands to weight my bikes. but, i just recently got a park tool repair stand (the PCS-10), so of course i decided to no longer weigh by holding it, but to clamp the scale in the stand and weigh like that. this has resulted in a 200 grams difference between holding it by hand and having it clamped in the stand ( it is 200 lighter in the stand).

what is going with that? which measurement is correct?

thanks!

o

by Weenie


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Delorre
Posts: 967
Joined: Sat May 24, 2014 12:09 pm

by Delorre

I would trust the measure from the stand more, a lot more steady!!

octave
Posts: 188
Joined: Sun Jan 15, 2017 8:47 pm

by octave

Delorre wrote:I would trust the measure from the stand more, a lot more steady!!


yeah that is what i was thinking, but i just wanted to make sure there wasn't some sort of calibration or something i had to do depending on how it was mounted/held.

gurk700
Posts: 956
Joined: Fri Jan 20, 2017 7:40 pm

by gurk700

How you reset is very important. If you hold it from the handle and weight lifting from the cord, it may show a very skewed result. If you reset properly, clamped via handle on stand, lift from cord by hand or hang from cord from a stationary object should all yield same result.

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oldnslow2
Posts: 266
Joined: Wed Feb 03, 2016 1:50 pm

by oldnslow2

The shape is designed to mount on a steady stand.

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Rick
Posts: 2034
Joined: Sat Aug 29, 2009 4:30 pm

by Rick

Your hand just isn't really steady enough for a precise measurement.
A 20 oz fish...maybe OK
A 15 lb bike: no way.

octave
Posts: 188
Joined: Sun Jan 15, 2017 8:47 pm

by octave

Rick wrote:Your hand just isn't really steady enough for a precise measurement.
A 20 oz fish...maybe OK
A 15 lb bike: no way.



thank you all for the replies-- i am glad it is just the stability factor and not something weird with my scale. i will stop trying to be a tough guy from now on. ;)

glad i got the stand, though, as now all my bikes are 200 grams lighter...!!


o

kode54
Posts: 3740
Joined: Tue May 23, 2006 9:39 pm

by kode54

Rick wrote:Your hand just isn't really steady enough for a precise measurement.
A 20 oz fish...maybe OK
A 15 lb bike: no way.


there's no 15 lb bikes here...this is weight weenies.
- Factor Ostro VAM Disc
- Factor LS Disc
- Specialized Aethos Disc
- Sturdy Ti Allroad Disc
- Guru Praemio R Disc

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oldnslow2
Posts: 266
Joined: Wed Feb 03, 2016 1:50 pm

by oldnslow2

octave wrote:as now all my bikes are 200 grams lighter...!!


o

Let us know how much faster yo now are ;)

2old4this
Posts: 366
Joined: Mon Jan 13, 2014 7:26 am

by 2old4this

I had a similar experience with PCS-10. Depending on where I hooked the bike from (middle of the top tube vs the saddle) the measured weight had 2-3 oz difference (BTW, I got a replacement and had the same experience.) I am guessing the issue is caused by having a wide two hooked design. When the center of gravity shifts, the hooks can easily touch the inner side of the handle, affecting the measurement.
Ended up returning it back...

by Weenie


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