![](media/image1.pct){width="590.0in" height="139.0in"}

Procedures for Monitoring & Recording Bullet Gauge Data After Skin
Welding

**1. Introduction/Scope**

This document describes the procedures to be followed when acquiring
bullet gauge data from a model HGQ magnet after skin welding has occured
and nominal end loads are being applied. It will describe the tasks to
be performed to connect the bullet gauge cables to the measurement
system, and the type of data acquisition program to be used. The DAQ
program and hardware is essentially identical to that used for strain
gauegs DAQ - only the software has been modified slightly to povide
on-line display of bullet loads. At this time, it is assumed that only 4
active bullet gauges are mounted at one end of the magnet.

**2. Wiring/Connecting Gauges to the Data Acquisition System**

The leads from the bullet gauges should be soldered to the 24-pin blue
connectors (Amphenol Type 57-10240, Newark Electronics Stk. \# 42F191)
according to the Bullet Gauge Wiring Diagram included in the Strain
Gauge Reference Book provided for each model HGQ magnet. These
connectors are numbered according to the Bullet Gauge Wiring Diagram,
and are then connected to the appropriate connector (same number) on the
upper rear interface panel of the Stain Gauge DAQ System (small blue
cart). Since the connectors are [not]{.underline} keyed, it is important
to ensure that the connectors are in the proper orientation (wide edge
on top).

**3. DAQ Programs**

The data acquisition program (DAQ) used to record bullet gauge
information is called "BULLETS.EXE" and is invoked by typing "BULLETS"
at the DOS prompt from the C:\\BC7\\BIN subdirectory. This subdirectory
can be accessed from any directory by typing "RUNDIR". The essential
functions of this program are identical to that used for Strain Gauge
DAQ. Complete program instructions, including examples, are contained in
the Strain Gauge Data Acquisition Operating Guide (TD Notes \# 97-037 &
97-038, copies of which are maintained with the SG DAQ System cart). The
primary differences between this program and the others is that it
assumes that only 4 active and two compensating bullet gauges are being
used, and thatthe gauges for bullet 1 (1A and 1B) are in channels 1 &2,
gauges for bullet 2 (2A and 2B) are in channels 3 & 4, etc.

**4. DAQ Schedule**

Bullet gauge data is to be acquired after the cold mass skin has been
welded and the end assmbely has been completed. The exact point during
the assembly procedure when bullet gauge data is needed will be
determined by the Magnet Fabrication Engineer or Physicist. At the time
that data is taken, the Bullet Gauge Data Sheets (found in the Strain
Gauge Reference Book supplied with each magnet) should be filled out.
These data sheets record such pertinent information as the date, DAQ
system operator, data file names, operational conditions, and the end
forces as displayed by the relevant DAQ program. A sample data sheet is
appended to this procedure.

Filenames for bullet gauge data, which are requested when operating the
DAQ programs, should be of the form

EMMDDNNN

where the letter E denotes end-force (bullet) gauge data, MM denotes the
month, DD the day of the month, and NNN the serial number of the file,
beginning at 001 for the first file recorded that day. No extension is
necessary - the DAQ programs append this automatically.

**5. Data Archival**

When all of the strain gauge data has been recorded, the raw data files
(extension .mst, found in the C:\\BC7\\BIN\\HGQS01 directory) should be
copied onto a floppy disk in the A: drive of the SG DAQ System PC, and
then delivered to the appropriate personnel for analysis, along with a
copy of all of the relevant Bullet Gauge Data Sheets. Copies of the data
sheets should also be inserted into the Strain Gauge Reference Book for
the particular magnet.