FIRST TIER POWER PAN ASSEMBLY INSTRUCTIONS
             --------------------------------------------
                                                         14-FEB-1992 

    This file lists some important points that must be remembered for
correct assembly of D0 Calorimeter Trigger Power Pans.  They should be
followed carefully.  It is also useful to have a correctly completed
power pan available for reference.

    This file specifies a rough order of operations as well.


Power Supplies
--------------

    Use the oldest power supplies first.  Steve and Dan know which 
    supplies are older (rm 156 has old supplies, S/N 43 is there).


    Recall that a pan is made up of one of each:

        Pioneer  -5.2V @ 200A
        Pioneer  -4.5V @ 200A
        Pioneer  -2.0V @ 250A
        Powertek +5.0V @ 600A


Power Pans
----------

    Each pan must have a circuit breaker housing.

    Verify that all wiring is in, and hardware is fastened.


Installing Supplies in Pans
---------------------------

    Put a serial number on each power supply.  Also put the serial
    number on the check-in sheet which is packed with the power supply.
    Be certain the S/N is legible and in a place which will not be
    hidden.  The first serial numbers should be:

        Pioneer ("small") bricks: #44   (note Pioneer bricks numbered
        sequentially regardless of voltage)

        Powertek ("big") bricks:  #14

    Write today's date on both the power supply and the check-in sheet
    which is packed with the power supply.

    Save the check-in sheet for Dan/Steve.

    The Pioneer bricks are fastened to the pan with the flat-head
    machine screws.  Please make certain no round-head screws are used.
    I think I sorted them all out.

    Verify that the bricks are mounted in the correct order.  See model.

    Be sure that the correct sensor wire is attached to the correct
    power pan.  The desired order is:
                
                                   Front View               

                                -5.2       -4.5                  
                                -2.0       +5.0                  
    
    Crimp, then solder, the lugs to the sensor wires.  The +5V Powertek
    brick needs the large lugs.

    Leave some "slack" in the sensor wires.  See model.

    Don't use washers on the sensor wire screws.

    When mounting sensor wire, be certain it is not going to be crushed
    by the monolith.  This is done by mounting the wire with duct tape 
    as seen on the model.  Ask Dan or Steve.

    Reinstall the shock-protector covers over the AC input wire leads.


Monoliths
---------

    Some monolith leads may need to be bent.

    Brass washers should be placed on both sides of the monolith lead to
    power supply lug connection.

    Make certain the monoliths are labelled with the voltaged on each 
    lead.


Finishing up
------------

    Protect the rear corner (where AC power comes in) with duct tape
    as in the model.

    Record which power supplies are in each pan.  The pan serial number
    is the monolith serial number.