Agilent Technologies 34401A manual Questionable Data Register

Chapter 4 Remote Interface Reference

The SCPI Status Model

The Questionable Data Register

The questionable data register provides information about the quality of the multimeter’s measurement results. Overload conditions and high/low limit test results are reported. Any or all of these conditions can be reported in the questionable data summary bit through the enable register. You must write a decimal value using the STATus: QUEStionable:ENABle command to set the enable register mask.

Note: A reading overload condition is always reported in both the standard event register (bit 3) and the questionable data event register (bits 0, 1, or 9). However, no error message is recorded in the multimeter’s error queue.

Bit Definitions – Questionable Data Register

	Bit	Decimal	Definition
		Value
0	Voltage Overload	1	Range overload on dc volts, ac volts,
			frequency, period, diode, or ratio function.
1	Current Overload	2	Range overload on dc or ac current function.
2	Not Used	4	Always set to 0.
3	Not Used	8	Always set to 0.
4	Not Used	16	Always set to 0.
5	Not Used	32	Always set to 0.
6	Not Used	64	Always set to 0.
7	Not Used	128	Always set to 0.
8	Not Used	256	Always set to 0.
9	Ohms Overload	512	Range overload on 2-wire or 4-wire ohms.
10	Not Used	1024	Always set to 0.
11	Limit Fail LO	2048	Reading is less than lower limit in limit test.
12	Limit Fail HI	4096	Reading exceeds upper limit in limit test.
13	Not Used	8192	Always set to 0.
14	Not Used	16384	Always set to 0.
15	Not Used	32768	Always set to 0.

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