Setting the SOS Hall Probe Zero Offsets

The procedure for setting the SOS Hall probe zero-offsets is as follows.

To accurately set the zero registers, you need to degauss the SOS and then follow this procedure:

1.Go to the terminal window with the SOS magnet control program.

2.Exit the SOS magnet control program.

3.Type stopsos

4.Type cd "~cvxwrks/SLOWC/SOS" (DOUBLE QUOTES NEEDED)

5.Type ld < hallcmd.o

6.Type hallcmd

7.Type a03 ia (This addresses probe 3, ie, the quad, and asks for the autorange status: 0 for off, 1 for on. It should be on and return a value of 1.)

8.If autoranging is off for some reason, turn it on by typing sb1, and then check it by typing ia.

9.Type z to initiate zeroing. In autorange mode, this causes all field range zero registers to be updated such that the hall probe reads 0.0 Gauss on all ranges. This takes about 10 seconds during which the hall probes will ignore new commands, so DON'T TYPE ANYTHING FOR 15 SECONDS!!!

10.Type iz to see what the zero register is on range 0. It should return a number within a few Gauss of 170 Gauss.

11.Type a return with no preceeding characters to exit the program.

12.Type sos to restart the normal control program.