TB 9-4931-413-40
Table 3. Weighting Network Response Check - Continued
Test instrument
Sound-level
Meter indications (db)1
Weighting
calibrator output
Switch position
frequency (Hz)
Min
Max
250
A
104.0(103.9)
106.6(106.9)
500
A
109.4(109.2)
112.0(112.2)
1000
A
112.6(112.3)
115.2(115.3)
2000
A
113.1(113.0)
116.7(117.0)
1Values
in parentheses are for TIs using microphones 1 1/8 inches in diameter. Values not enclosed in parenthesis are for TIs
using microphones 15/16 inch in diameter.
b. Adjustments. No adjustments can be made.
11. Final Procedure
a. Deenergize and disconnect all equipment.
b. Annotate and affix DA label/form in accordance with TB 750-25.