Measurement Operation and Trigger Function

Sets the measurement operation and trigger functions.

The trigger is classified into two sequence groups, TRIGger[:SEQuence[1]] and TRIGger:SEQuence2.

Sequence 1: Impedance measurement

Sequence 2: Voltage and current measurement

- <meter_fn>

There are three types of measurement functions on the KFM2150: impedance measurement, voltage measurement, and current measurement.

This manual expresses the third level node of FETC?, READ?, and MEAS? as <meter_fn>. Refer to Table 5 and replace <meter_fn> with the required measurement function.

Table 5 Designation of <meter_fn>

Seaquence | <meter_fn> | Measurement Function | Response Unit
1 | IMPedance[:MAGNitude] | Impedance (magnitude) measurement | OHM
IMPedance:RESistance | Impedance (resistance) measurement | OHM
IMPedance:REACtance | Impedance (reactance) measurement | OHM
IMPedance:PHASe | Phase angle measurement | DEG
VOLTage:CYCLe | Voltage measurement (Voltage synchronized to the impedance measurement) | V
CURRent:CYCLe | Current measurement (Current synchronized to the impedance measurement) | A
2 | VOLTage[:DC] | Voltage measurement | V
CURRent[:DC] | Current measurement | A

- Difference between SCALar and ARRay

The second level node of FETC?, READ?, and MEAS? can be [SCALar] or ARRay.

[SCALar] is the default node that can be omitted. It returns a single value regardless of the trigger count designation.

If ARRay is specified, multiple points of measured data separated by commas are returned according to the trigger count designation.

Table 6 indicates the contents of the response in [SCALar]/ARRay for the trigger count designation.

Table 6 Contents of the [SCAL]/ARR response

Trigger Count | Node | Response
1 | [SCALar] | A single measured value 9.9E37 if over range -9.9E37 if under range
ARRay | A single measured value 9.9E37 if over range -9.9E37 if under range
2 or greater | SCALar] | Average of all measured data points (excluding over range and under range data) 9.9E37 if all data points are over range -9.9E37 if all data points are under range
ARRay | Array of all measured data points separated by commas

If the measurement is not yet complete immediately after the INIT command is sent or immediately after the READ?/MEAS:<meter_fn>? query is sent, the KFM2150 generates the response data after the measurement completes in response to a FETC?/READ?/MEAS:<meter_fn>? query.