| 3 | | = Datataking Limits |
| 4 | | |
| 5 | | These are instructions copied here from the DataTakingMainPage (Section DataTaking third point) |
| 6 | | |
| 7 | | - Monitor the system and in special the currents |
| 8 | | - limits for the currents are defined in the DatatakingLimits |
| 9 | | - if the limits for the currents are exceeded you have to stop datataking: |
| 10 | | - stop the script (dimctrl --stop from a bash) |
| 11 | | - stop Trigger (MCP/STOP or FTM_CONTROL/STOP_TRIGGER |
| 12 | | - ramp down the voltage (BIAS_CONTROL/SET_ZERO_VOLTAGE) |
| 13 | | - close open files (FAD_CONTROL/CLOSE_OPEN_FILES) |
| 14 | | - 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. |
| 15 | | - 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>") |
| 16 | | - Be aware of all other DatatakingLimits |
| | 3 | = when you reach these Limits: STOP DATATAKING! |
| 19 | | ------ |
| 20 | | |
| 21 | | These are the [[https://www.fact-project.org/logbook/misc.php?page=limits | Datataking Limits]] from our myBB logbook |
| 22 | | The original text said: |
| 23 | | |
| 24 | | > when you reach the Datataking Limits **stop datataking**! |
| | 6 | || value || max || action || |
| | 7 | || [[http://fact-project.org/smartfact/index.html?sound#fact|median current per pixel in camera]] || 115 uA || stop or reschedule |
| | 8 | || [[http://fact-project.org/smartfact/index.html?sound#current|maximum current in a single pixel]] || 160 uA || stop or reschedule |
| | 9 | || [[http://fact-project.org/smartfact/index.html?sound#fact| abs(T_GAPD - T_ambient)]] || 15° C || stop || |
| | 10 | || [[http://fact-project.org/smartfact/index.html?sound#temperature| T_container]] || 40° C || stop || |
| | 11 | || [[http://fact-project.org/smartfact/index.html?sound#pointing | Zenith angle]] || ~88° || stop or reschedule || |
| | 12 | || [[http://fact-project.org/smartfact/index.html?sound#fact | Wind speed]] || exceeds 50km/h significantly or in regular intervals || stop || |
| | 13 | || [[https://www.fact-project.org/sandbox/AllSkyCloudDetection/ | Clouds]] || no stars visible in pointing direction || stop or reschedule || |
| | 14 | || Rain || it is raining || stop || |
| | 15 | || [[http://fact-project.org/cam/index.php | clouded mirrors/water on mirrors or light pulser]] || stop || |
| 27 | | = Limits for running the System |
| | 18 | == "stop or reschedule"? |
| | 19 | |
| | 20 | stop:: |
| | 21 | Stop the normal observation mode, by scheduling the task named `Sleep` |
| | 22 | on the [[https://www.fact-project.org/schedule/| scheduler page ]] for __right now__. |
| | 23 | This brings the system into a safe state and the shifter has time to think. |
| | 24 | |
| | 25 | reschedule:: |
| | 26 | In case it seems possible to observe another source, |
| | 27 | because e.g. another source is less obscured by clouds, |
| | 28 | the shifter is of course free to try that. |
| | 29 | |
| | 30 | Also sometimes SpecialMeasurements can be done. |
| 30 | | || value || max || action || additional information || |
| 31 | | || __Currents__ || |
| 32 | | || median current per pixel in camera: || 90 uA || stop script, ramp down voltage || displayed in smartfact (mainpage, line 'GAPD') || |
| 33 | | ||maximum current in a single pixel: || 110 uA || stop script, ramp down voltage || the crazy pixels are excluded from this limit || |
| 34 | | || __Temperature__ || |
| 35 | | || temperature difference: || 7° C || monitor the temperatures carefully || _difference between sensor compartment and outside temperature_ || |
| 36 | | || temperature difference:|| 15° C || stop data taking || _difference between sensor compartment and outside temperature_ || |
| 37 | | || temperature in container :|| 40° C || do not observe when the temperature in the container is above 40 deg || |
| 38 | | || __Drive system__ || |
| 39 | | || Zenith angle:|| ~75° || || data with higher zenith do not make much sense || |
| 40 | | || Zenith angle:|| ~88° || stop data taking on this source, look for a source with smaller zd || || |
| 41 | | || __Wind__ || |
| 42 | | || Wind speed|| exceeds 50km/h significantly or in regular intervals || bring telescope to parking position and wait for better wind situations || || |
| 43 | | || __Weather__ || |
| 44 | | || 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 || || |
| 45 | | || Rain || it is raining || stop script, close camera || we need rain sensor to identify rain clearly || |
| 46 | | || clouded mirrors/water on mirrors or light pulser || do not observe, wait until water is gone || you may check with IR camera || |
| 47 | | || 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 || |
| 52 | | = This was the original content of this page, before additional contant was added. |
| 53 | | |
| 54 | | - switch off voltage |
| 55 | | - BIAS_CONTROL/SET_ZERO_VOLTAGE |
| 56 | | - wait a few minutes, so that the camera can cool down |
| 57 | | - track another region and try again datataking (you can first test which currents you will get, by following steps): |
| 58 | | - FEEDBACK/START_CURRENT_CONTROL 0.0 |
| 59 | | - BIAS_CONTROL/SET_GLOBAL_DAC 1 |
| 60 | | - this will ramp up the voltage, so that you can check the currents |
| 61 | | |
| 62 | | - if it is raining |
| 63 | | - switch off voltage |
| 64 | | - close lid |
| 65 | | - park telescope |
| 66 | | |
| 67 | | |
