Keypad Layout – GA257L & GA257B ......................................................................... 17
Powering Your Sonus Meter ............................................................................................. 18
Switching Your Sonus Meter On/Off ............................................................................ 19
CHAPTER 5 ....................................................................................... 20
Main Menu Navigation ............................................................................................................... 20
Models GA116I, GA216I, GA116B, GA216B, GA257B .............................. 21
Calibration [CAL <OK] ................................................................................................ 21
Exposure Time [ET <OK] ........................................................................................... 23
Frequency / Time Weighting [WTG <OK] ....................................................... 23
Exchange Rate [EXCH <OK] .................................................................................... 24
Criterion [CRIT <OK] ................................................................................................... 25
Threshold [THR <OK] ................................................................................................. 26
Keypad Lock [LOCK <OK] ......................................................................................... 26
Display Contrast [CONT <OK] ................................................................................ 27
Models GA116L, GA216L, GA116E, GA257L .................................................. 28
Calibration [CAL] .......................................................................................................... 28
Instrument Settings [SETUP] ................................................................................ 30
Frequency Weighting [FREQ WGT] .............................................................. 31
Time Weighting [TIME WGT] ........................................................................... 32
Recording Interval Period [INTERVAL] ........................................................ 34
Display Contrast [CONTRAST] ........................................................................ 36
Percentiles [USER Ln] ......................................................................................... 37
Criterion Level [CRIT] ........................................................................................... 38
Threshold [THR] ..................................................................................................... 39
Exchange Rate [EXCH] ........................................................................................ 40
Record Timer [TIMER] ........................................................................................ 41
Current Date [DATE] ............................................................................................ 42
Real Time Clock [TIME] ....................................................................................... 43
User Mode [MODE] .................................................................................................... 44
View Saved Logs [LOGS] .......................................................................................... 45
Delete Saved Logs [DELETE] .................................................................................. 46
Set Instrument Defaults [DEFAULTS] ............................................................... 47
Keypad Lock [LOCK] ................................................................................................... 48
CHAPTER 6 ....................................................................................... 49
Stop / Record Mode .................................................................................................................. 49
Model ‘I’ & ‘B’ Instruments ................................................................................................. 49
Model ‘L’ & ‘E’ Instruments ................................................................................................ 50
All Models ................................................................................................................................... 51
Model ‘I’ & ‘B’ Instruments – Information Screen ............................................ 51
Model ‘L’ Instruments – Information Screen ...................................................... 52
Model ‘E’ Instruments – Information Screen ...................................................... 53
Reset Data ........................................................................................................................... 54
Models ‘I’ & ‘B’ .............................................................................................................. 54
Models ‘L’ & ‘E’ .............................................................................................................. 54
CHAPTER 7 ....................................................................................... 55
Parameters ..................................................................................................................................... 55
Available Parameters - Models ‘I’ & ‘B’ ........................................................................ 55
Available Parameters - Model ‘L’ ..................................................................................... 57
Available Parameters - Model ‘E’ ..................................................................................... 59
Parameter Explanations ...................................................................................................... 61
Sound Pressure Level ..................................................................................................... 61
