Extech Instruments 407790 User Manual page 12

3. Use the LM/ 1/1/ 1/3 button to select the desired SLM, 1/1 or 1/3 octave band sound
pressure level measurement screen.
4. Use the FREQ WGHT button to select the desired L
setting.
5. Use the TIME CONST button to select the desired FAST or SLOW time constant setting.
Normally, the "FAST" setting should be used.
6. Use the LEVEL
"OVER" and "UNDER" indications do not appear. In SLM mode, the dynamic range is
30~130dB, so the
7. Press the START/STOP button. The " " mark appears on the display and the
equivalent continuous sound pressure level measurement begins.
8. The following status displays are used in the mode " measuring", "
terminate". Use the MODE button to select any parameter L, Leq, L
9. When the measurement time set in step 2 has elapsed, the measurement terminates
automatically.
10. Terminate the measurement earlier by pressing the PAUSE/CONT button, "
appear on the display. Press PAUSE/CONT to resume measuring.
11. Press the START/STOP button to stop measuring, the " 5 " mark will appear on the
display.
12. Press the MODE button to display the L
Note: In this measurement mode, the frequency weighting, time weighting and SLM/ 1/1/
1/3 mode cannot be changed.
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
FAX 781.665.0780 - TestEquipmentDepot.com
FAST
L
A
dB
100
90
80
70
60
50
40
30
Hz 31.5 125 500
[ 1 / 1 OCT ] 01 / 07 / 27 14:26:39
button to select the level range. Choose a setting in which the
LEVEL key is not activated.
W 75.2 dB
2k 8k L W
, L or L
A C
, L or other parameter value.
Aeq AE
frequency weighting
P
pause " or "5
, Lmax or Lmin.
E
" will