instrument handle identifies a particular instrument session.

You obtain the instrument handle parameter from niDMM Initialize or niDMM Initialize With Options. The default is None.

Min Frequency specifies the minimum expected frequency component of the input signal in hertz.

This parameter affects the DMM only when you set the Function property to AC measurements. NI-DMM uses this parameter to calculate the proper aperture for the measurement. NI-DMM sets the Min Frequency property to this value. The valid range is 1 Hz-300 kHz for the NI 4070/4071/4072, 10 Hz–100 kHz for the NI 4065, and 20 Hz–25 kHz for the NI 4050 and NI 4060.

Max Frequency specifies the maximum expected frequency component of the input signal in hertz within the device limits. This parameter is used only for error checking and verifies that the value of this parameter is less than the maximum frequency of the device.

This parameter affects the DMM only when you set the Function property to AC measurements. NI-DMM sets the Max Frequency property to this value. The valid range is 1 Hz-300 kHz for the NI 4070/4071/4072, 10 Hz–100 kHz for the NI 4065, and 20 Hz–25 kHz for the NI 4050 and NI 4060.

error in (no error) describes error conditions that occur before this VI runs. If an error occurred before this VI runs, the VI passes the error in value to error out. This VI runs normally only if no error occurs before this VI runs. If an error occurs while this VI runs, it continues and sets its own error status in error out. Use niDMM Error Message to display the description of the error code. Use error in and error out to check errors and to specify execution order by wiring error out from one node to error in of the next node.

	status is TRUE (X) if an error occurred before this VI ran or FALSE (checkmark) to indicate a warning or that no error occurred before this VI ran. The default is FALSE.
	code is the error or warning code. The default is 0. If status is TRUE, code is a negative error code. If status is FALSE, code is 0 or a warning code.
	source describes the origin of the error or warning and is, in most cases, the name of the VI that produced the error or warning. The default is an empty string.

instrument handle out returns a handle that you use to identify the instrument in all subsequent instrument driver VI calls.

error out contains error information. If error in indicates that an error occurred before this VI ran, error out contains the same error information. Otherwise, it describes the error status that this VI produces. Right-click the error out indicator on the front panel and select Explain Error from the shortcut menu for more information about the error.

	status is TRUE (X) if an error occurred or FALSE (checkmark) to indicate a warning or that no error occurred.
	code is the error or warning code. The default is 0. If status is TRUE, code is a negative error code. If status is FALSE, code is 0 or a warning code.
	source describes the origin of the error or warning and is, in most cases, the name of the VI that produced the error or warning. The default is an empty string.