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Author Topic: Keithley 602 scale  (Read 926 times)

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Offline justanothernameTopic starter

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Keithley 602 scale
« on: October 04, 2019, 07:59:10 pm »
Hello Forums!
Today I ruined my Keithley 602 scale by accident.
Is anyone able to provide me a scan of that scale or, better, a replacement?
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Offline justanothernameTopic starter

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Re: Keithley 602 scale
« Reply #1 on: October 06, 2019, 04:22:49 pm »
Hello.
So I made a replacement scale for the 602. Propably it will fit to the 610 as well. Files attached. PDF and DXF for the laser.
« Last Edit: October 06, 2019, 04:25:44 pm by justanothername »
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Offline justanothernameTopic starter

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Re: Keithley 602 scale
« Reply #2 on: October 19, 2019, 09:13:51 pm »
I may be talking to myself or no one but maybe someone will have the same problem as I had replacing the mercury cell inside this meter.
My solution is a Saft LS14500 sealed primary cell with 10 years shelf life and 2600mAh capacity, followed by a TPS709135 ldo with 1µA Iq. Mounted on adapter pcb with some capacitors.
There is some very small amount of noise visible in the 0.001 range multiplier setting, but totally acceptable and now this meter is finally fully restored.
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Offline don.r

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Re: Keithley 602 scale
« Reply #3 on: October 20, 2019, 03:13:43 am »
Excellent work! It looks beautiful.
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