# Measuring TCS for sample holder in more detail than 25-06-2012
# Trying again after failure in 9:52.dat
# The offset of the electrometer changes. Will record the offset, and reset it on every measurement

# Pressure = 3.14e-7 mbar
# Va = 383 V
# Vf = -24 V
# Vv = 17.38 V
# Vd = 0.0 V
# If = 1.20 A

# Start 10:2

# Vi (V)	Ie	Is  Offset
0.00	10.5	0.0000	0.0040 # Scale is 10e-6 x 0.01
0.20	10.5	0.0000	0.0050
0.30	10.5	0.0000	0.0010
0.40	10.3	0.0005	0.0010
0.50	10.4	0.0020	0.0005
0.60	10.5	0.0035	0.0010
0.70	10.5	0.0080	0.0010
0.80	10.5	0.0155	0.0010
0.90	10.5	0.0275	0.0015
1.01	10.5	0.0460	0.0015
1.10	10.5	0.0725	0.0020
1.20	10.5	0.105	0.0025 # Scale change to 10e-6 x 0.1
1.30	10.5	0.142	0.005
1.40	10.5	0.197	0.010
1.50	10.5	0.250	0.015
1.60	10.5	0.135	0.060			
# NOTE: For Vi = 1.60 V, Ie went to 12.2 uA, and Is became strongly positive (it should be negative; I have left off negative signs)
# But then after a few seconds Ie went back to 10.5 uA, and Is became measurable, and negative
1.70	10.5	0.200	0.020
1.80	10.5	0.275	0.025
1.90	10.5	0.360	0.020
2.00	10.6	0.425	0.050
2.10	10.5	0.520	0.060
# NOTE: Vi = 2.20 V 	Can no longer adjust zero offset knobs; they are maxed out
# Turning off electrometer, and turning back on solves problem, but then offset begins to rapidly increase (negatively)
# It seems to be faster than it was earlier