2 # Making initial I-V curve
5 # Pressure = 3.19e-7 mbar
14 # Vi (V) Ie (uA) Is (uA)
40 # 1. Zero offset on electrometer appears to have increased from 0.0 uA to 0.5 uA during data collection.
41 # 2. The increase in emission current may have been due to heating of the filament, although the filament current had been applied for 10 minutes before taking any results. Need to obtain filament current .vs. time curve for comparison.