Meter Description; Display Description - Extech Instruments 407764 User Manual

Meter Description

1. Microphone
2. Display
3. Power switch
4. Level range control switch
5. MAX hold switch
6. Frequency weighting switch
7. Response time select switch
8. AC output terminal
9. DC output terminal
10. CAL (calibration) pot.
11. External DC 6V power
12. RS-232 interface connector
13. Battery cover
14. Tripod mounting screw
15. Wind-screen

Display Description

1. Range selection
2. Date information
3. SPL: Instantaneous sound pressure level
4. Low-Battery
5. MAX: Maximum SPL value is held
6. Data recording
7. Measurement value
8. Memory full
9. Units
10. Frequency weighting (A/C)
11. TIME function
12. 50dB level (Bargraph)
13. Over range
14. SLOW time response
15. FAST time response
16. Under range
(Figure 1)
(Figure 2)
3 Model 407764 Version 1.4 December 2004