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EMC Monitoring: Current Alarm Settings


V00-02 Jan 11 2000
Pierre-Alexandre Fischer

  • Current Alarm Settings
  • General Remarks
    Alarm limits are set in the Epics database. There are four different alarm settings: Low and High Warning and Low and High Alarm. For each of these four alarm settings a severity is applied. It can be NO_ALARM, MINOR or  MAJOR
    Only Monitoring experts and specifically trained people should be bale to change alarm settings in the Epics database.
    This requires to reboot the IOC and is therefore to be avoided during running period. The alarm severity is used by Epics to evaluate the detector status by combining the alarm conditions of individual channels.
    If some channel shows an alarm constantly oscillating around the alarm limit, please contact the monitoring expert.
    If the alarm however stays, action should be taken. See the shifters instructions.
    The alarm handler described later in this document analyses all alarm conditions and sends warning signals (sound) to the shifter. It relies severity of the alarm as it is defined in the Epics database.
    Here are the different alarm settings. The conventions adopted for the EMC are: Warning = MINOR severity and Alarm = MAJOR severity.

    Crystal Temperature
      Normal Value LOW Alarm Low Warning  High Warning HIGH Alarm
    Barrel 20 deg C 15 deg C 16 deg C 23 deg C 24 deg C
    End Cap 20 deg C 15 deg C 16 deg C 23 deg C 24 deg C

    IOB Temperature
     
    Normal Value
    LOW Alarm
    Low Warning
    High Warning
    HIGH Alarm
    Barrel 
    45-55 deg C
    10 deg C
    15 deg C
    60 deg C
    65 deg C
    End Cap 
    45-55 deg C
    10 deg C
    15 deg C
    60 deg C
    65 deg C

    Low voltage front end electronics

    BARREL
     
    Normal Value
    LOW Alarm
    Low Warning
    High Warning
    HIGH Alarm
    I (+5V)
    6-6.5 Amps
    -
    5.0
    7.5
    8.0
    V (-5V)
    4.9-5.1 Volts
    -
    4.5
    5.5
    6.0
    I (-5V)
    3.5-4.5 Amps
    -
    3.0
    5.0
    5.5
    I (+10V)
    5.0-5.5 Amps
    -
    4.5
    6.5
    7.0
    T (PS)
    35-40 deg C
    -
    10.
    60.
    65.

    END CAP
    Normal Value
    LOW Alarm
    Low Warning
    High Warning
    HIGH Alarm
    I (+5V)
    4.0-4.5 Amps
    -
    3.5
    5.5
    6.0
    V (-5V)
    4.9-5.1 Volts
    -
    4.5
    5.5
    6.0
    I (-5V)
    2.5-3.5 Amps
    -
    2.0
    4.0
    4.5
    I (+10V)
    3.0-3.5 Amps
    -
    2.0
    4.5
    5.0
    T (PS)
    25-30 deg C
    -
    10.
    60.
    65.

    Transition boards
     
     
    Normal Value
    LOW Alarm
    Low Warning
    High Warning
    HIGH Alarm
    I (+5V)
    0.4-1.1 Amps
    -
    5.0
    7.5
    8.0
    V (-5V)
    4.9-5.3 Volts
    -
    4.5
    5.5
    6.0
    I (-5V)
    3.5-4.5 Amps
    -
    3.0
    5.0
    5.5
    I (+10V)
    0.2-0.8 Amps
    -
    4.5
    6.5
    7.0
    T (PS)
    25-35 deg C
    -
    10.
    60.
    65.

    Diode Bias Voltage
     
     
    Normal Value
    LOW Alarm
    Low Warning
    High Warning
    HIGH Alarm
    VMON
    30.0 Volts
    -
    25.0
    55.0
    70.0
    IMON
    200 MicroA
    -
    0.0
    500.0
    1000.0

    Dry Nitrogen Flow
     
    Normal Value
    LOW Alarm
    Low Warning
    High Warning
    HIGH Alarm
    Humidity
    1.2 %
    -
    0.0
    5.0
    10.0
    Oxygen
    0.2 %
    -
    0.0
    5.0
    10.0


Last modified P-A Fischer  January 11 2000