Fluke PM-3390B Questionable status data, VOLTage, TEMPerature, CALibration, Overload 50Ω

3 - 72 USING THE COMBISCOPE INSTRUMENTS

3.15.1.2Questionable status data

	CONDition		filter		EVENt		ENABle
VOLTage		0		**		0		0
0		1		**		1		1
0		2		**		2		2
0		3		**		3		3
TEMPerature		4		**		4		4
0		5		**		5		5
0		6		**		6		6
0		7		**		7		7
CALibration		8		**		8		8
Overload 50Ω		9		**		9		9
0		10		**		10		10
0		11		**		11		11
0		12		**		12		12
0		13		**		13		13
0		14		**		14		14
0		15		**		15		15

STATus:QUEStionable:CONDition?

:PTRansition(?)

:NTRansition(?)

:EVENt?

:ENABle(?)

ST7157

Figure 3.25 The Questionable Status structure

BIT: MEANING:

0VOLTage

This bit is set if a digital sample value is clipped at the maximum or minimum value while a FETCh? query is done on the sample array. This bit is also set if a FETCh? query did not succeed because the shape of the waveform did not match the measure function request.

Example: FETCh:FREQuency? in the case of only half a sine wave.

4TEMPerature

This bit is set by the instrument if the difference between the current temperature and the temperature at the moment of the last calibration exceeds a certain level. This is an indication that the instrument must be calibrated. The temperature is sensed internally about half an hour after

power on. This bit is reset after power on and after calibrating.

8CALibration

This bit is set by the instrument when an internal calibration did not complete successfully. This bit is reset after power on and after successful calibration.

9Overload 50Ω

This bit is set by the instrument when any 50Ω input terminator is overloaded. This bit is reset after power on, or if none of the input terminators is overloaded.

Table 3.4 The Questionable Status bits