Extech Instruments 407790A, User Manual

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407790A-EN_V2.4 1/20
2.3 Display Screen
1. Mode of analysis: Indicates the condition of the display screen.
SLM: Sound level meter display
1/1 OCT: Octave band analysis screen
1/3 OCT: 1/3 Octave band analysis screen
1/1 and 1/3 OCT: Simultaneous octave and 1/3 octave band analysis screen
2. Measurement in progress: When a measurement recording is in progress or during auto store
the

symbol flashes. During measurement pause the symbol is displayed on the screen.
3. USB Link Status: Shows if the USB is enabled or disabled.
4. Trigger Mode: Controls the measurement and memory auto store start behavior. Available
modes are: Level 1 (LV1), Level 2 (LV2), EXT (EXT), and time (TIME).
5. Elapsed Time: Displays the elapsed time in seconds during processing and storing memory.
6. Memory: Displays the selected memory for storing data.
F
L
: The data will be stored in the internal memory of the meter.
Sd: The data will be stored on the micro SD card
Mode of analysis
Measurement in progress symbol
USB link status
Trigger mode
Elapsed time
Memory
Store mode
Address
Level range
Overload indication
Sub channel level display
Sub channel
Time weighting
Frequency weighting
Current time
Current date
Comparator ON
Auto store full indication
Manual store full indication
Power
status
Main channel level
display
Time weighting
Main channel
Frequency weighting
Underrange indication
Bar graph