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CMS Pixel Detector
Miscellaneous
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Phase 1
Phase 2
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Layer 1 Replacement
Layers 2-4
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| Layer 1 Replacement Elog |
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Message ID: 51
Entry time: Thu Jan 23 14:54:45 2020
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| Author: |
Dinko Ferencek |
| Category: |
Cold box tests |
| Subject: |
Keithley exchanged |
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Yesterday during an attempt to run the FullQualification, elComandante would lose control over Keithley after performing the IV curve measurements and would go in the subsequent Fulltest with HV off. This happened both between the two sets of tests at -20 C and between the tests at -20 C and +10 C. Today we exchanged the old Keithley with a new one and we observe that the communication with this new Keithley is much smoother without any error codes and warning sounds produced by Keithley.
In order to properly communicate with the new Keithley, it was necessary to set its communication mode to RS-232 and BAUD rate to 57600 (https://youtu.be/-5RmguqC7xA). Everything else was left unchanged:
BITS = 8
PARITY = NONE
TERMINATOR = <CR+LF>
FLOW-CRTL = XON-XOFF |