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= Datataking Limits

These are instructions copied here from the DataTakingMainPage (Section DataTaking third point)

- Monitor the system and in special the currents
 - limits for the currents are defined in the DatatakingLimits
 - if the limits for the currents are exceeded you have to stop datataking:
 - stop the script (dimctrl --stop from a bash)
 - stop Trigger (MCP/STOP or FTM_CONTROL/STOP_TRIGGER
 - ramp down the voltage (BIAS_CONTROL/SET_ZERO_VOLTAGE)
 - close open files (FAD_CONTROL/CLOSE_OPEN_FILES)
 - adapt your schedule (edit ~/operation/scripts/schedule.js) and update the schedule (dimctrl --quit --cmd ".js scripts/updateSchedule.js") Note, that only entries which are schedules for *now* or the future are transferred to the database. All previous entries stay like they are.
 - you can write also your own schedule file and transfer its content to the database by given the filepath to the command: (dimctrl --quit --cmd ".js scripts/updateSchedule.js file=<!pathToScheduleFile>")
- Be aware of all other DatatakingLimits


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These are the [[https://www.fact-project.org/logbook/misc.php?page=limits | Datataking Limits]] from our myBB logbook 
The original text said:

> when you reach the Datataking Limits **stop datataking**!


= Limits for running the System


|| value || max  || action || additional information ||
|| __Currents__  ||
|| median current per pixel in camera:  || 90 uA || stop script, ramp down voltage || displayed in smartfact (mainpage, line 'GAPD') ||
||maximum current in a single pixel: ||  110 uA || stop script, ramp down voltage ||  the crazy pixels are excluded from this limit ||
|| __Temperature__ ||
|| temperature difference: || 7° C ||  monitor the temperatures carefully ||  _difference between sensor compartment and outside temperature_  || 
|| temperature difference:||  15° C ||  stop data taking ||  _difference between sensor compartment and outside temperature_  || 
|| temperature in container :||  40° C ||  do not observe when the temperature in the container is above 40 deg || 
|| __Drive system__ || 
|| Zenith angle:||  ~75° ||  ||  data with higher zenith do not make much sense || 
|| Zenith angle:||  ~88° ||   stop data taking on this source, look for a source with smaller zd  ||  || 
|| __Wind__ ||
|| Wind speed||  exceeds 50km/h significantly or in regular intervals ||  bring telescope to parking position and wait for better wind situations ||  || 
|| __Weather__ ||
|| Clouds ||  no stars visible in allsky camera in pointing direction ||  stop datataking, you may continue tracking the source or observe another source in case stars are visible in that direction  ||  || 
|| Rain ||  it is raining ||  stop script, close camera ||  we need rain sensor to identify rain clearly || 
|| clouded mirrors/water on mirrors or light pulser ||  do not observe, wait until water is gone ||  you may check with IR camera ||  
|| Humidity ||  - ||  check general weather condition, especially if it is raining ||  high humidity (there is a warning at 98%) alone is not a reason to stop ||  


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= This was the original content of this page, before additional contant was added.

- switch off voltage
 - BIAS_CONTROL/SET_ZERO_VOLTAGE
- wait a few minutes, so that the camera can cool down
- track another region and try again datataking (you can first test which currents you will get, by following steps):
 - FEEDBACK/START_CURRENT_CONTROL 0.0
 - BIAS_CONTROL/SET_GLOBAL_DAC 1
 - this will ramp up the voltage, so that you can check the currents

- if it is raining
 - switch off voltage
 - close lid
 - park telescope