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Testing Patient Scales #73707 10/10/18 9:30 AM
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andysang Offline OP
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Hi Guys

Has anyone come across an alternate tester for testing patient scales.

My hospital has 50 odd scales and I have lost the strength to be able to wheel around 250 kgs for my annual testing .
Something like a calibrated strain gauge or ...

Cheers

Re: Testing Patient Scales [Re: andysang] #73708 10/10/18 6:23 PM
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Geoff Hannis Offline
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Use plastic containers and water ... using the well known formula that relates volume of water to weight (mass). smile


If you don't inspect ... don't expect.
Re: Testing Patient Scales [Re: andysang] #73710 11/10/18 1:34 PM
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Malcolm Online Content
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Andy, Sounds like you need an apprentice !!

Re: Testing Patient Scales [Re: andysang] #73712 11/10/18 4:41 PM
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kit Offline
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We don't check the calibration of scales, however, what would be wrong with just weighing yourself on a calibrated scale then quickly going round and weighing yourself on the 50 odd scales you have and if the measurement ties up(within a few percent) it passes.

Re: Testing Patient Scales [Re: kit] #73714 11/10/18 5:23 PM
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Geoff Hannis Offline
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See this earlier thread ... and this one. smile


If you don't inspect ... don't expect.
Re: Testing Patient Scales [Re: kit] #73727 19/10/18 3:32 PM
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Showman Offline
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I can see the auditors having a field day with all these suggestions, the only correct way is to have 3 calibrated reference weights and use them. You may break your back but you are covering your backside.

Re: Testing Patient Scales [Re: Showman] #73728 19/10/18 6:38 PM
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Geoff Hannis Offline
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Which auditors would that be? think

And how do you calibrate weights? Certify, may be. And what tolerance is allowed?


If you don't inspect ... don't expect.
Re: Testing Patient Scales [Re: andysang] #74579 27/09/19 4:10 AM
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Philip Page Offline
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I have a compression jig that can measure up to 500KG - use a car jack to make the compression.

The accuracy can easily be established by using known controlled weights and measuring main scale with these - I currently have accuracies of 1g in 100Kg - not high level, like lab level scales, but OK for human scales.

The whole thing weighs about 40 KG, and when its used correctly - you can measure any digital scales that lock out after a period of time, ie I regularly test Seca 813's to their max weight of 200Kg.

I believe all scales ought to be weight check across 100% of their weight range to ensure there is no mechanical sticking or binding at some point.

Phil

Re: Testing Patient Scales [Re: Philip Page] #74583 01/10/19 9:53 AM
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Neil Porter Online Happy
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Phil, do you have a calibration certificate for your 'Jig' if not then all data is invalid.

JCI, CBAHI, ISO etc. require that all test equipment must be calibrated and certified annually.


If you think hiring professionals is expensive, try hiring amateurs!
Re: Testing Patient Scales [Re: Geoff Hannis] #74584 01/10/19 9:55 AM
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Neil Porter Online Happy
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Weights need a calibration certificate on an annual basis the same as test equipment


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