3M SE-400 user manual AC/DC Output Characteristics section

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Data Addendum

Windscreen corrections with QE7052 microphone

*Note: add to the windscreen response to calculate the response without the windscreen

Frequency	Corrections
in Hz	in dB
1000	0.0
1250	-0.2
1600	-0.2
2000	-0.3
2500	-0.4
3150	-0.4
4000	-0.2
5000	0.0
6300	0.0
8000	0.0
10000	0.1
12500	0.2
16000	0.5

Display and Integration (sections: 5.15.5, 5.15.6, 5.15.7, 9.2.5f)

The display update rate is 1 second. The display is updated every second during integration.

Resetting Overload, Under Range, Maximum, and Peak (section 9.2.5 k)

Press the run key to reset. This will reset the measurement data and the indicators. The time to reset is immediate.

Minimum/Maximum integration time (sections: 5.17.1, 5.17.2)

The Minimum/Maximum integration time for measurement time-average levels.

Measurement type	Time average levels
Minimum	1 second
Maximum	99 hours

Reference direction (section: 9.2.5a)

The reference direction is at 0⁰ for both BK4936 and QE7052 microphone. The equivalent random incidence direction is 70⁰.

AC/DC Output Characteristics (section 5.16.1)

AC Output:

Weighting: Z-Weighting

Range of Signal: +/- 2.5 Vp

Output Impedance: 2K Ohm

Recommended load impedance: > 40K Ohms

DC Output:

Weighting: A, C, or Z (as set by user)

Range of Signal: 0 to 3.3Vdc, 1mV = 0.1dB (i.e. 450mV = 45.0dB), Under-range ~ 0Vdc, Overload >= 2.0Vdc

Output Impedance: 1K Ohm

Recommended load impedance: > 20K

Sound Examiner SE-400 Series