4.8-6 Section 4: Using the Model 9100: Conductance Function
Final Width = 215mm
4.8.5.1 Conductance Resolution Thresholds
The different resolutions are distinguished by two characteristics:
• Maximum and minimum values available.
• Absolute resolution of the least-significant digit.
The following table shows the spans of output values for the Conductance function,
against their associated resolutions.
4.8.5 Crossing Thresholds
Absolute Span of Values
Resolution
0.1pS 02.5000 nS to 24.9999 nS
1pS 002.500 nS to 249.999 nS
10pS 0.00250 µS to 2.49999 µS
100pS 00.0025 µS to 24.9999 µS
1nS 000.003 µS to 249.999 µS
10nS 0.00001 mS to 2.49999 mS
Rules, built into firmware, govern passage across thresholds between resolutions.
Increasing Output or Offset Conductance
Using the
key in Digit Edit facility; an audible warning will be given if the new value
is too large for the present span of values, with a reminder (Up range required) on the
screen. The user must change to the next lower resolution, with a larger span of values,
using the
key. This rule applies whether OUTPUT is OFF or ON.
When using either the X10 screen key or the Direct Edit facility; if the new value is too
large for the present resolution, a lower resolution will be activated with a larger span of
values. No warning will be given. This rule applies whether OUTPUT is OFF or ON.
Decreasing Output or Offset Conductance
Using Digit Edit; values down to the minimum of 2.5nS lie within all spans with
resolution of 100pS or better. If the required value lies between steps of the present
resolution, the user must increase resolution using the
key, also reducing the span
of values. This rule applies whether OUTPUT is OFF or ON.
Using either the ÷10 screen key or Direct Editing; if the required value lies between
increments of the present resolution, a greater resolution will be activated with reduced
span. No warning will be given. This rule applies whether OUTPUT is OFF or ON.
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