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Bug #658

Fix 401.1 - Signal switching; zero cal switch

Added by tin almost 8 years ago. Updated over 4 years ago.

Status:
Closed
Priority:
Normal
Assignee:
Target version:
Start date:
01/13/2013
Due date:
01/13/2013
% Done:

50%

Estimated time:
1.00 h

Description

Failure: Cannot measure 0V ±0.001V at A/D IN.

Common is routed to the ACF line through U526 (SHORT pulled low). ACF is then
routed through multiplexer U511. The output of the multiplexer (OUT) follows the
same path to the A/D buffer (U322) as the 400 series tests. U322 is conÞgured for x1 gain. Measure 0V at A/D IN.

Replace U526
Replace U511

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