Bug #274
K2 : ERROR 401.1 - Signal switching; zero cal switch
| Status: | Closed | Start date: | 19/07/2012 | |
|---|---|---|---|---|
| Priority: | Normal | Due date: | ||
| Assignee: | tin | % Done: | 0% | |
| Category: | - | |||
| Target version: | Keithley 2001 #2 |
Description
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.
Suspected components:
U526
U511
U322 - same as 400 tests - x1 gain
History
#1 Updated by tin about 7 years ago
- Status changed from New to Resolved
Fixed by Q330 and Q512 replacement
#2 Updated by tin over 4 years ago
- Status changed from Resolved to Closed