Note on Fluke 45 current fuses ....
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It is VERY EASY to blow the protection fuse on the 
Fluke 45 multimeter's 100mA current range.  If you 
connect the test leads to Common and the 100mA current
inputs, and then leave them there, the next person to
come along and try to make a voltage measurement on a
low-impedance voltage source (like the output of the
power supply) will blow the current fuse, if they don't
switch the lead back to the voltage input.  So
encourage your students to put the test leads back
on the volt/ohm input when they are done measuring
current.

Because it is so easy to blow the current fuse,
we keep a supply of 500mA fuses in WSEC 323.  
There's a small brown paper envelope containing fuses 
in the door of the desk in WSEC 323.  

To test whether the fuse is blown:

- unplug any test leads from the 100mA current input
- press in on the 100mA current input jack and turn it
counterclockwise.
- pull it out, also the fuse behind it.
- use the resistance range of any other working ohmmeter
to see if the fuse has continuity.  It should either be less
than 1 ohm (OK) or infinity (blown.)
- if it is blown, replace it with one of the fuses from
the desk.

If you run out of fuses, let me know, we'll get more.