Keysight E4981A - Setting up Limit (Boundary Value) of Low C Reject Function

Keysight E4981A 120 Hz/1 kHz/1 MHz Capacitance Meter 131
Sorting Based on Measured Results (Comparator Function)
Rejecting Excessively Low Measured Results (Low C reject function)
Setting up limit (boundary value) of Low C reject function
Set up the limit of the Low C reject function (boundary value of the range to
detect Low C) as a percentage of the measurement range (full scale). The
applicable measurement range varies depending on the setting of the
measurement range mode:
• For the auto range mode
The minimum measurement range is applicable regardless of whether the
measurement is actually performed. Specifically, it is one of the following
measurement ranges:
When measurement frequency is 120 Hz: 10E
-9
F (10 nF) range
When measurement frequency is 1 kHz: 100E
-12
F (100 pF) range
When measurement frequency is 1 MHz: 1E
-12
F (1 pF) range
• For the fixed range mode
The measurement range currently selected is applicable, that is, it is the
range in which the measurement is actually performed.
For example, if you make a measurement with the 1 μF range fixed and set the
limit to 1%, Low C is detected when the measured primary parameter value (Cs
or Cp) is equal to or less than 10 nF.
Setup procedure
Step 1. Press [Meas Setup].
Step 2. Use the cursor key to select the LOW C REJ field.
Step 3. Use the entry keys or softkeys to enter the limit value. When you enter the
value with the entry keys, the softkey unit label changes to (%).
Softkey Function
INCR+ Increments the Low C Reject value in steps of 0.001%.
DECR- Decrements the Low C Reject value in steps of 0.001%.