Configure Operation

Basic Tab

The Basic tab for the Configure operation contains the following options:

• Measurement Function —The measurement function. The value of this setting determines the units for the Range and Resolution settings and the measurement values the Read and Fetch operations return.

  Supported Value	Description
  DC Volts (1)	Sets the DMM to measure DC voltage.
  AC Volts (2)	Sets the DMM to measure AC voltage.
  DC Current (3)	Sets the DMM to measure DC current.
  AC Current (4)	Sets the DMM to measure AC current.
  Resistance 2-wire (5)	Sets the DMM to measure 2-wire resistance.
  Resistance 4-wire (101)	Sets the DMM to measure 4-wire resistance.
  AC Plus DC Volts (106)	Sets the DMM to measure AC voltage plus DC voltage.
  AC Plus DC Current (107)	Sets the DMM to measure AC current plus DC current.

• Resolution —The measurement resolution in absolute units of precision. The Measurement Function setting determines the units for resolution. If the resolution value you specify does not exactly match a value an instrument driver supports, the instrument driver will coerce down to the next supported value. You can calculate the digits of precision from the Range and Resolution settings, as shown in the following example:

  Precision = Log10(Range/Resolution)

• Min AC Freq —The minimum frequency component in hertz of the input signal for AC measurements. If Min AC Freq does not exactly match a value an instrument driver supports, the instrument driver will coerce down to the next supported value. The value of this setting only affects instrument behavior when the Measurement Function setting is set to an AC voltage or AC current measurement and the AC Measurement extension is enabled.
• Max AC Freq —The maximum frequency component in hertz of the input signal for AC measurements. If Max AC Freq does not exactly match a value an instrument driver supports, the instrument driver will coerce up to the next supported value. The value of this setting only affects instrument behavior when the Measurement Function setting is set to an AC voltage or AC current measurement and the AC Measurement extension is enabled.
• Trigger Source —The trigger source, which controls when the DMM takes a measurement. The Trigger Source setting defines the location of the trigger.

  Supported Value	Description
  Immediate (1)	Specifies that the DMM does not wait for a trigger before taking a measurement.
  External (2)	Specifies that the DMM waits for a trigger on the external trigger input before taking a measurement.
  Software (3)	Specifies that the DMM waits for a trigger until the Send Software Trigger operation executes and then takes a measurement.
  TTL0 (111)	Specifies that the DMM waits for a trigger on TTL0 before taking a measurement.
  TTL1 (112)	Specifies that the DMM waits for a trigger on TTL1 before taking a measurement.
  TTL2 (113)	Specifies that the DMM waits for a trigger on TTL2 before taking a measurement.
  TTL3 (114)	Specifies that the DMM waits for a trigger on TTL3 before taking a measurement.
  TTL4 (115)	Specifies that the DMM waits for a trigger on TTL4 before taking a measurement.
  TTL5 (116)	Specifies that the DMM waits for a trigger on TTL5 before taking a measurement.
  TTL6 (117)	Specifies that the DMM waits for a trigger on TTL6 before taking a measurement.
  TTL7 (118)	Specifies that the DMM waits for a trigger on TTL7 before taking a measurement.
  ECL0 (119)	Specifies that the DMM waits for a trigger on ECL0 before taking a measurement.
  ECL1 (120)	Specifies that the DMM waits for a trigger on ECL1 before taking a measurement.
  PXI Star (131)	Specifies that the DMM waits for a trigger on the PXI Star trigger bus before taking a measurement.
  RTSI0 (140)	Specifies that the DMM waits for a trigger on RTSI0 before taking a measurement.
  RTSI1 (141)	Specifies that the DMM waits for a trigger on RTSI1 before taking a measurement.
  RTSI2 (142)	Specifies that the DMM waits for a trigger on RTSI2 before taking a measurement.
  RTSI3 (143)	Specifies that the DMM waits for a trigger on RTSI3 before taking a measurement.
  RTSI4 (144)	Specifies that the DMM waits for a trigger on RTSI4 before taking a measurement.
  RTSI5 (145)	Specifies that the DMM waits for a trigger on RTSI5 before taking a measurement.
  RTSI6 (146)	Specifies that the DMM waits for a trigger on RTSI6 before taking a measurement.

• Range —The measurement range. Use this setting only when the Range Mode setting is set to Use Specified Range. If the range value you specify does not exactly match a value an instrument driver supports, the instrument driver will coerce up to the next supported value. The Measurement Function setting determines the units of Range. You can calculate the digits of precision from the Range and Resolution settings, as shown in the following example:

  Precision = Log10(Range/Resolution)

  Supported Value	Description
  Auto Range On (-1)	Sets the DMM to automatically calculate the range before each measurement.
  Auto Range Off (-2)	Disables autoranging. The DMM sets the range to the value it most recently calculated.
  Auto Range Once (-3)	Sets the DMM to calculate the range before the next measurement. The DMM uses this range value for all subsequent measurements.
  Use Specified Delay (0)	Enables you to manually specify the measurement range.

• Trigger Delay —The length of time in seconds between the DMM receiving the trigger and taking the measurement. Many DMMs have a small, nonzero value as the minimum value for trigger delay. To configure the instrument to use the shortest trigger delay, set this setting to 0 . The driver will coerce any value between zero and the minimum Trigger Delay value you specify to the minimum supported value. Trigger Delay is only used when the Trigger Delay Mode setting is set to Use Specified Delay.

  Supported Value	Description
  Auto Delay On (-1)	Sets the DMM to calculate the trigger delay before each measurement.
  Auto Delay Off (-2)	Stops the DMM from calculating the trigger delay and sets the trigger delay to the last trigger delay the DMM calculated.
  Use Specified Delay (0)	Enables you to manually specify the length of time, in seconds, between the DMM receiving the trigger and taking the measurement.