Section 3
3-53
Resistor Setup:
Rs - The value in ohms of the Rs resistor.
A positive number has to be entered for a valid measurement configuration.
The value given for Rs determines what nanovoltmeter range the
measurement is done on as follows:
Nanovoltmeter Range = 20 V Rs 300 k
Nanovoltmeter Range = 2 V Rs 3 k
Nanovoltmeter Range = 200 mV Rs 30
Nanovoltmeter Range = 20 mV Rs 0.3
Nanovoltmeter Range = 2 mV Rs 0.3
Rs serial # - The character string entered here is the label the file is saved
under if you do decide to save this measurement configuration.
Rx - no entry is needed here. A value is entered if you want to skip the rough
null checks in the startup of the measurement.
Reversal Rate (seconds)- A whole number 4 and 32,000 (9hrs) must be
entered for a valid measurement cycle.
For the best possible measurements with the lowest noise it is highly
recommended that:
for Rs > 10 k that a reversal rate of at least 90 seconds be
chosen
for Rs ≤ 10 k a reversal rate of at least 60 seconds be chosen.
Test Current (mA) - a number greater than 0 must be entered here for a
valid measurement configuration. Resistance measurements are generally
done at a 10 mW power level on the Rs resistor.
Note that "Test Current" is the current sent to the Rx resistor.
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