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Support #974

K2001_Amps_out_of_Tol

Added by Anonymous almost 6 years ago. Updated over 3 years ago.

Status:
Closed
Priority:
Normal
Assignee:
Target version:
-
Start date:
02/28/2014
Due date:
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0%

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Description

Hello,
i got a Problem with my K2001 : only 200mA and 2A range are out of tolerance. They will not be adjusted by the K2001. The repairbokk tell me, that there are Problems with the Shunts, but they are still ok.
I think there is a problem around U322 (x1/x50) with the factor of the amplifier. Buti can not finde the resistors for the amplifiers.

Have you got any suggestions ?

#1

Updated by tin almost 6 years ago

  • Status changed from New to In Progress

What was your test source? You need at least 200ppm accurate source to ensure it's 2001's problem.
And what are actual values you measured?
If you could provide more details about your setup, might get easier to help.
Can upload files here by using attachment function.

Does meter pass built-in selftest? Shunts barely a problem there.

If your meter in tolerance for voltages, ohms - U322 section likely to be okay, as it's used for all measurements, not only amps.

#2

Updated by Anonymous almost 6 years ago

hello tin,

the source is a Fluke-5700A (calibrated) and the multimeter passed all tests without faults. The values in the 200mA-range are 189,5xx at 190mA nominal and 1,875A at 1,9A nominal. The same difference in AC. I checked the shunts and changed them with an other K2001, no difference. It is possible that the factor at the ranges are not ok (x50)? For these amplifier U323, i can not find the resistence for the factors.

All other Values are in tolerance.

any suggestions ?

#3

Updated by tin almost 6 years ago

Since you have 5700A available best option would be to run calibration on 2001.
Fixed offset errors can be fixed by meter automatically after calibration.
Detailed calubration procedure available in related manual.

#4

Updated by tin over 3 years ago

  • Status changed from In Progress to Closed

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