Shift Taker

Overview of Temperature and Power Supply Monitoring Screen

During your shift, make sure you monitor this screen. If there are windows missing, there are instructions to start these windows below. If the windows are not nicely organized, organize them!

Starting the Slow Control and Power Supply GUI's

To start up the GUIs for the slow controls, log into clonusr3 as clas12run (ask expert for password).

> ssh clas12run@clonusr3

You can then start up the master button gui with:

clonusr3:clas12run> hps_epics

• The top button "IOC Status" gives you a status window for the IOCs, and allows you to reboot them. 
• "Alarm Handlers" brings up the alarm handlers 
• "BEAM", gives a GUI window with two buttons, one for the main class display and one for the injector.
• "Voltages" button brings up a window with 2 new buttons which give you control of the SVT or ECAL voltages, see descriptions below.
• "Motors" currently (4/28/12) not working
• "Strip Charts" not yet working (4/28/12)
• "DAQ Status" not yet working (4/28/12)

"Temperatures" brings up:
   
 
The SVT Temps and ECAL Temps bring up:

Note the "SVT DAQ Heartbeat": if this reads "dead", then the values on the GUI are old and not updated. 

Check if the SVT DAQ is still running.

• If the SVT DAQ is down this is normal. Check how long it will be down and if you should power down the SVT.
• If SVT DAQ is ON and it has OK status: call the expert.
• If SVT DAQ is down and you didn't turn it off: call the expert
• Check that the temperature on the inlet and outlet of the vacuum box is normal

Pay attention as you need to determine the status of the system to avoid damaging temperature to the SVT. If unsure; call the expert.

The Ecal temperatures should be around 70F.

SVT Voltages brings up:

The Alarm Handler brings up:
When there is an alarm this button will be flashing, either yellow or red, and a beeping sound is made. Please read the Alarm section below how to navigate and respond to the alarms.

Turning power ON

Make sure that the box to the right of the OFF/ON buttons are RED.

To turn on the low voltage power (DVDD, AVDD and V125) and the high voltage bias click the ON button next to the hybrid you want to power.

Note: there is often a very significant delay before the GUI updates after a change so be patient.

You should see currents on DVDD (~250mA) and AVDD(~350mA but sometimes ~500mA). The current on V125 will often be zero until the DAQ has configured the chips. The bias should ramp up and you should see it stopping at 180V.

One special feature is that the DVDD power is coupled between two hybrids (0&1,2&3, and so on). Thus you will see DVDD current of the other hybrid ON even though that hybrid is not "ON". This is expected and normal behavior.

Turning power OFF

Make sure that the box to the right of the OFF/ON buttons are GREEN.

To turn on the low voltage power (DVDD, AVDD and V125) and the high voltage bias click the OFF button next to the hybrid you want to power.

Note: there is often a very significant delay before the GUI updates after a change so be patient.

You should see all low voltage currents and high voltage bias ramping down.

One special feature is that the DVDD power is coupled between two hybrids (0&1,2&3, and so on). This means that powering down always results in powering down BOTH hybrids. This is expected and normal behavior.

Turning on BIAS voltage for all modules on the SVT

Never do this without explicit instructions from an expert!

Find the GUI for the SVT voltages.

There is a box in the upper right corner "Bias Voltage Setpoints". Input your new bias voltage value and hit Enter. This will propagate this voltage to all SVT modulels.

To turn bias on individually please look at the section below.

Alarm Handler

To be filled.

What to look for:

Alarm panel

Interlock signal

To be filled

Low voltage power for the SVT

The applied voltages for the low voltage supplies are hard-coded and cannot be changed.

Nominal low voltage currents during normal operations/data taking:

High voltage bias for the SVT

High voltage should be at 180V during normal operations/data taking.

Changing high voltage bias values is an expert only action.

Expert Only

Changing voltages

In EPICS control gui we can click the button to the right saying "Hybrid x" (x=[0,9]) and a new GUI pops up showing more options.

To set the voltage there are three columns to pay attention to:

Input V: used to change the Demand V

Demand V: voltage that will be applied whenever the PS is turned on for this channel.

Measured V: measured voltage

Only the bias voltage can be changed; the low voltages are "hard coded".

Changing the bias voltage

This should only be done by expert!

1. Open the hybrid view of the particular hybrid you want to change.

2. Identify the TOP or BOTTOM BIAS row and go to the Input V column.

3. In order to propagate a new value to the PS you need to

3.1 Highlight the number in the Input V box

3.2 Put your desired new voltage and directly hit Enter

Note. Don't touch the mouse after highlighting the numbers, this will remove your input and nothing will be changed.

3.3 You should see your number propagate to the Demand V column (this might take 1min, be patient!).

Starting the SVT voltages using manual scripts

Two power supplies crates are being used to power the top and bottom volumes of the SVT.

To connect to their interfaces, first login into clon10 from a JLab machine with the user name clasrun:

> ssh clasrun@clon10

In order to obtain the password, talk to an expert!

At this point, the EPICS GUI is started as follows:

> medm -x /usr/local/clas/devel/R3.14.12/support/xycomioc-1.0/medm/svt_trips.adl

Using the serial interface

In the case where the operation of the power supplies can not be done through EPICS, each power supply can be accessed directly through a terminal.  After login into clon10 (see above), the command

 > tsconnect hpshv1

will bring up the display for the power supply powering the top SVT volume and

 > tsconnect hpshv2

will bring up the display for the power supply powering the bottom volume.  After each of the terminal interfaces come up, hitting N (next) will refresh the window. It will also allow you to navigate between screens
The following table provides a map from a power supply channel # to a physical location on the SVT:

Half_Module_Assignments-Power_Supply_Assignments.pdf

Updated with switched connectors:

half-module assignments - Power supply assignments updated.pdf