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Entry  Wed Feb 21 17:20:32 2018, johannes, Update, VAC, Hornet gauge connected to DAQ. VacLog.png
    Reply  Fri Feb 23 07:47:54 2018, Steve, Update, VAC, CC1 Hornet InstruTech_Hornet_CC1.pngCC1_readback_updated.png
       Reply  Mon Mar 5 10:13:21 2018, gautam, Update, VAC, vacuum health VacuumStatus.png
Message ID: 13647     Entry time: Wed Feb 21 17:20:32 2018     Reply to this: 13653
Author: johannes 
Type: Update 
Category: VAC 
Subject: Hornet gauge connected to DAQ. 

I wired the six available BNC connectors on the front panel of the new XEND slow DAQ to physical Acromag channels. There were two unused ADC channels and eight DAC channels, of which I connected four. The following entries were added to /cvs/cds/caltech/target/c1auxex2/ETMXAUX2.db /caltech/target/c1auxex2/ETMXaux2.db

Connector Acromag Channel EPICS Name
In1 XT1221C #6 C1:Vac-CC1_HORNET_PRESSURE_VOLT
In2 XT1221C #7 C1:PEM-SEIS_XARM_TEMP_MON C1:PEM-SEIS_EX_TEMP_MON
Out1 XT1541B #4 C1:PEM-SEIS_XARM_TEMP_CTRL C1:PEM-SEIS_EX_TEMP_CTRL
Out2 XT1541B #5 Not Assigned
Out3 XT1541B #6 Not Assigned
Out4 XT1541B #7 Not Assigned

C1:Vac-CC1_HORNET_PRESSURE_VOLT is converted to the additional soft channel C1:Vac-CC1_HORNET_PRESSURE in units of torr using the conversion  10^{(\mathrm{Voltage}-10)} stated in the manual. A quick check showed that the resulting number and the displayed pressure on the vacuum gauge itself agree to ~1e-8 torr. Gautam added the new EPICS calc channel to the C0EDCU and restarted FB, now the data is being recorded.

Three of the output channels do not have a purpose yet, so their epics records were created but remain inactive for the time being.

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