[3dem] K3 problem during warming up

[Parvate, Amar D]

Hey Shixin
Sometimes the errors you see K3 computer could be due to a communication issue especially because other than that your K3 seems to be working fine.
Have you tried restarting the controllers for both the GIB and the camera? Confirm with your Gatan Primary FAS but the order is of shutdown is – Shutdown GMS/DM, then Shutdown PC, then GIB controller, then Gatan controller. Wait for 10 mins. Bring them back up as GIB controller first, then Gatan controller, then the Gatan PC. This has gotten rid of these errors for us in the past.
As for the DM crash – we have seen it happen while both collecting data on SerialEM as well as EPU. We just check the ZLP centering if you are using a filter, check if any alignments need to be touched up and restart data collection again.
Hope this works
Best
Amar

From: 3dem <3dem-bounces at ncmir.ucsd.edu> On Behalf Of shixin yang
Sent: Thursday, October 14, 2021 12:36 PM
To: 3dem at ncmir.ucsd.edu
Subject: [3dem] K3 problem during warming up

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Dear colleagues,

Our K3 camera in krios has two problems:

1. When we carry out cryo cycle in the weekend, K3 camera will be warmed up. Two messages pop up during warming up K3 camera (see attached). The first message ("The sensor is off") will show up after ~ 20 minutes warming up. The temperature increase to 37 degree in K3 camera. Another message (the sensor is on)  will show up when temperature drops down in camera. The camera still works fine in spite of these two messages. Does anyone observe this message? Does this message imply any damage in the camera sensor?

2. Another message occasionly pops up during data collection (see 2nd attachment) in SerialEM. It indicates that DM stops work. We can't click any other place in windows desktop except this message window. After clicking "close the program", DM will be automatically be shutdown. Camera can be restored to work after restart DM.

Any input will be greatly appreciated.

Thanks

Shixin
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