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Larson Davis System 824 manuals available for free PDF download: Technical Reference Manual, Reference Manual, Training Manual
Larson Davis System 824 Technical Reference Manual (673 pages)
Precision Sound Level Meter & Real Time Analyzer
Brand:
Larson Davis
| Category:
Measuring Instruments
| Size: 7 MB
Table of Contents
Table of Contents
5
Chapter 1 Introduction
21
About this Manual
21
Special Features of the Electronic Version
23
Bookmarks
23
Opening Bookmarks
23
Closing Bookmarks
24
Expanding Bookmarks
24
Click to Display Page
25
Return to Previous View
25
Links
25
About this Chapter
26
Formatting
26
Features
27
Hardware Features
27
System 824 Components
30
System Diagram
33
Getting Started
34
Unpacking and Inspection
34
Comments Concerning the Digital Signal Processor
36
Accessories and Optional Equipment
36
Connecting Internal or External Power
38
Using the Nimh Battery Pack
38
Using Alkaline Batteries or Individual Nimh Rechargable Cells
39
Using the AC Power Adapter
40
Chapter 2 Overview
41
System 824 Setups or Instrument Definitions
41
Instrument Definition (ID) Types
42
Write Protect, Delete, Write Enable Ids
42
Slm&Rta (Ssa)
42
Slm (Ism)
44
Logging (LOG)
44
Selecting a Measurement Setup
46
Performing a Measurement; SLM&RTA (SSA)
47
Stop, Pause and Back Erase Functions
48
Stopping and Starting Measurements
48
Pausing Measurements
48
Back Erasing
48
Changing the Detector of the Displayed SPL Value
48
Changing the Frequency Weighting of the Displayed SPL Value
49
Changing the Displayed Secondary Parameter
50
Changing the Frequency Weighting of the Displayed Lpeak Value
50
Changing the Amplitude Range, or Input Gain
50
Views
51
Selecting a VIEW
51
Data Storage and Recall
53
Storing Data
53
Recalling Data
53
Calibration
54
Correction of Calibrator Output Level
57
Chapter 3 Front Panel Keys; Functions and Menus
59
Power Key
61
Power-Up the Instrument / Viewing PWR Display
62
Power Settings
64
Extra Notes on Power Conservation
66
Run/Stop Key
66
R Reset Key
67
Pause Key
68
Pause
68
Pause, Back Erase
68
Preview
69
Lrud Arrow Keys
69
Check Key
70
View Key
70
D Data Key
71
S Setup Key
72
Save ID
74
Title
74
ID Name
74
Write Protect, Delete, Write Enable Ids
75
Ttools Key
76
About
78
Calibration
80
Clock/Timer
81
Memory
85
Deleting Stored Data
87
Delete Last Function
87
824 Memory Structure
87
Deleting the Last Stored Record
88
Deleting Individual Records
89
Power Monitor
91
Communication
92
P Print Key
95
Chapter 4 Quick Start
97
Turning on and Calibrating the System 824
97
High Range Calibration
100
Taking Measurements and Storing Data
101
SLM&RTA Measurements
101
Viewing RTA Displays During a Measurement
104
Recalling Stored Data
107
Selecting and Modifying Instrument Definitions (Ids)
108
The Setup Menu
109
The Active ID
109
Menu Scrolling
111
Permanent Ids
111
Write-Protected Ids
112
Preparing for a Measurement
112
Selecting a Different ID
113
Accessing the Settings Menu
113
Accessing the Settings Menu to Initiate Editing or Modification
114
Setting Control in the SLM View
118
Chapter 5 System 824 Views
121
Status Icons and Indicators
122
General Views
124
SLM Views
125
Any Data View
128
Any Level Format
128
Any Impulse Format
128
Any Time Format
129
SSA Specific Views
129
SSA Displays
131
SSA Displays Including 1/1 or 1/3 Octave Spectral Data
131
Tabular SSA Views
132
Time History Displays
133
SSA Intervals
133
SSA Time History
136
Run Log
139
Ln Centiles
139
Logging SLM Specific Views
143
Current SLM and Overall SLM Views
145
Current Slm/Overall SLM Display-A (SPL)
146
Current/Overall SLM Display-B (Times)
148
Current/Overall SLM Display-C (Min/Max)
149
Current/Overall SLM Display-D (Peaks)
149
Current/Overall SLM Display-E (TWA)
150
Exposure Views
151
Exposure Display-A
152
Exposure-B Display
153
Exposure-C Display
154
Ln Centiles Views
155
Ln-A Display
155
Ln-B Display
156
Stats Views
157
Stats-A Display
158
Stats-B Display
158
Stats-C Display
159
Run Log (LOG & SSA)
160
Time History
162
Single Other Level
163
Multiple Other Levels
163
Intervals
164
Intervals-A Display
164
Intervals-B Display
166
Intervals-C Display
167
Intervals-D Display
168
Intervals-E Display
169
Intervals-F Display
170
Exceedance History
172
Excd-A Display
172
Excd-B Display
173
Excd-C Display
174
Excd Time History Display
175
Daily Views
178
Daily-A Display
178
Daily-B Display
180
Daily-C Wind Display
181
Daily-D Windy Percent Display
182
Hourly Leq Display
183
Metrics
185
Metrics-A Display
185
Metrics-B Display
186
Passby
187
Wind/Tach
189
Wind-A Display
189
Wind-B Display
190
Wind-C Percent Display
191
Chapter 6 System 824 Virtual Instruments
195
Selecting an Instrument ID
197
Sound Spectrum Analyzer (SSA)
197
SSA Measuring Ranges
198
LN Percentiles (Spectral)
199
AC/DC Output
199
Logging SLM
201
Time History
201
Interval History
201
Exceedances
202
LN Percentiles (Broadband)
202
Sound Exposure
203
LOG and ISM Measuring Ranges
203
Chapter 7 Using ID Setting Files
205
Recalling ID Setting Files
205
Customizing Settings
206
Settings Example - SLM&RTA (SSA)
206
Settings Descriptions
208
Common SLM Settings
209
Title Setting - (SSA, LOG, ISM)
209
Detector Setting - (SSA, LOG, ISM)
209
Weighting Setting - (SSA, LOG, ISM)
210
Gain Setting - (SSA)
210
Range Setting - (LOG, ISM)
211
Transducer Setting - (SSA, LOG, ISM)
212
Random Incidence Microphone Correction - (Available to All Instrument Types)
212
Pk Weighting - (SSA, LOG, ISM)
213
RTA Detector Setting - (SSA)
213
RTA Weighting - (SSA)
214
Bandwidth Setting - (SSA)
214
Common Control Settings
214
Control Settings - (ISM)
214
Control Settings
215
AC/DC Output Settings - (SSA, LOG, ISM)
216
Logic Input Setting - (SSA, LOG, ISM)
216
Logic Output Setting - (SSA, LOG, ISM)
217
Logic Output Time Setting - (SSA, LOG, ISM)
219
Logic Output #2
220
Logic Output #2 Time Setting
220
Heater on
220
E. A. Cal Tone
220
Logging SLM TWA Settings
221
Ovll Exchange - (LOG)
221
Ovll Threshold - (LOG)
222
Ovll Criterion - (LOG)
222
Criterion Time - (LOG)
223
Crnt Exchange - (SSA, ISM, LOG)
223
Crnt Threshold (SSA, ISM, LOG)
224
Crnt Criterion (LOG)
224
LOG and SSA Ln Settings
224
Enable Ln
225
Start Level
225
Ln's
226
Spectral Ln's (SSA Only)
226
LOG and SSA Triggering Settings
227
SPL Excd Lvl 1 - (LOG, SSA)
227
SPL Excd Lvl 2 - (LOG, SSA)
227
PK Excd Lvl 1 - (LOG, SSA)
228
Pk Excd Lvl 2 - (LOG, SSA)
228
Hysteresis - (LOG, SSA)
228
LOG and SSA Wind/Tach Settings
229
Setup of Wind/Tach Function
230
Wind Scale
231
Wind Units
232
Direction Units
232
Wind/Tach Enable
233
Windy Threshold
233
Wind Exceedance Level
233
Windy Hysteresis
233
Wind Pause Enable
234
Pulse Trigger Voltage
234
Pulse Source
234
LOG and SSA Time History Settings
234
Hist Enable - (LOG, SSA)
236
Hist Period (LOG, SSA)
237
Period Units - (LOG, SSA)
237
Other Level - (LOG Only)
237
Resolution - (LOG, SSA)
238
Advanced Time History - (LOG, SSA)
239
Marker Text - (LOG, SSA)
239
LOG and SSA Interval Settings
240
Intv Enable - (LOG, SSA)
241
Intv Period - (LOG, SSA)
241
Intv Time Sync - (LOG, SSA)
241
Intv Save Ln's - (LOG, SSA)
242
Intv Auto Stop - (LOG, SSA)
242
Intv Threshold - (LOG, SSA)
243
Intv Exchange - (LOG, SSA)
243
Intv Spectrum - (SSA Only)
243
Logging SLM Exceedance History Settings
244
Triggering - (LOG)
244
Excd Enable - (LOG)
244
Min Duration - (LOG)
244
Excd Time Hist - (LOG)
245
Period - (LOG)
245
Excd Trigger - (LOG)
245
Excd Time - (LOG)
245
Timed Excd Period - (LOG)
245
Daily Enable - (LOG)
246
Daily Ln's - (LOG)
246
Logging SLM Define Report Settings
246
Data Report - (LOG, SSA)
247
Setup Report - (LOG, SSA)
247
SPL Histogram - (LOG)
248
Pk-1 Histogram - (LOG)
248
Pk-2 Histogram - (LOG)
248
Intv Report - (LOG, SSA)
248
Hist Report - (LOG, SSA)
249
Menu Layout of SSA Settings
249
Menu Layout of Integrating SLM (ISM) Settings
254
Menu Layout of Logging SLM Settings
256
Advanced Menu Layout
260
Check Menus
263
Check Menu Example
264
SLM Check Menu Options (SSA and LOG)
266
Mark Display
266
Graph Menu
268
Settings
269
Controls Settings Menu
269
Other SSA Check Menus
269
Any Data Check Menu
269
RTA Check Menu
270
Intervals Check Menu
271
Time History Check Menu
272
Run Log Check Menu
273
Ln Centiles Check Menus
274
Other Logging (LOG) Check Menus
277
Any Data Check Menu
277
Current SLM / Overall SLM Check Menu
277
Exposure Check Menu
277
LN Centiles Check Menu
278
Stats Check Menu
279
Run Log Check Menu
279
Time History Check Menu
280
Intervals Check Menu
280
Excd History Check Menu
281
Daily History Check Menu
282
Chapter 8 Printing a Report
285
Connecting the 824 to a Serial Printer
285
Printing Reports
286
Defining and Printing Tailored Reports
289
Using the Recall Format (SSA and LOG Instruments Only)
291
Default Settings Values for the Recall Format Reports
292
Printing a Custom Report
307
Chapter 9 Performing a Sound Level Measurement
313
Configuration of the System
313
Selecting a Measurement Mode
313
Selecting a Measurement ID
314
Editing the Microphone Parameters
315
Calibration
315
Entering the Noise Floor Values
316
Editing the Measurement Parameters
317
Positioning the Meter
319
Use of a Windscreen
319
Selecting the SLM Display
321
Selecting the Measurement Range
321
ISM and LOG Modes
321
Selecting the Range Setting
322
Performing a Measurement
323
Averaging Time
324
Linearity Range
325
Overload and under Range Conditions
326
Overload Condition
326
Reset
326
Under Range Condition
326
Max, Min and Peak Values
327
Measuring for a Preset Integration Time
328
Timer Mode
328
Measuring Using User-Selectable Thresholds
329
Chapter 10 Using the 824 Utility Software
331
824 Utility Installation
331
Starting the 824 Utility Software
332
Connecting to Your Computer
332
824 Utility Tool Bar
334
824 Utility Setup Window
336
Retrieving Setups from the 824
337
Modifying and Storing Setups to the 824
339
Changing System Settings
339
Manipulating a Setup
340
Saving Setups to Disk Files
342
Opening Setup Disk Files
342
Creating a New Setup
344
Renaming an Existing Setup
345
Deleting an Existing Setup
346
Locking and Unlocking Setups
347
Downloading Measurement Data
347
Specifying a Destination File
348
Changing the Download File Name
350
Adding Notes to a Download File
351
Selecting Active Measurements or Data Files
351
Downloading the Measurement
352
Explanation of Files in the 824 Utility Directory
354
Translating Data from a Downloaded Binary File
355
Selecting a Data Set to View
357
Printing a Translated File
359
Viewing a Translated File Within a Spreadsheet Program
361
Additional Features
362
Chapter 11 RTA (Optional)
367
Settings Menu
368
Settings Descriptions
372
RTA Settings Menu
372
Autostore Settings Menu
374
Arm Settings Menu
375
Trigger Settings Menu
377
End Settings Menu
378
Then Settings Menu
380
Trigger Settings Menu (Continued)
380
RT60 Reverberation Time Settings
382
RT60-A and RT60-B Instrument Definition
383
Qualifying Background Noise: Rooms [RTA] ID
384
Display Views
385
RTA Views
385
Trigger Views
389
Autostore Views
391
Autostore Bytime Spectral History
395
Bytime Spectrum Check Menu
396
Bytime Graph Check Menu
397
Rt-60
399
RT60 Check Menu
401
Spatial Avg Views
401
Spatial Avg Check Menu
403
Avg History Check Menu
404
Rooms Views
405
Chapter 12 FFT (Optional)
409
Features
409
Settings Menu
409
Settings Descriptions
411
FFT Display
414
Fft
414
FFT Check Menu
416
THD (Total Harmonic Distortion)
417
THD Check Menu
418
Snapshot
419
Snapshot Check Menu
420
FFT Calibration
421
Calibrating Db to a Different Reference
421
Displaying Amplitude in Linear Units
422
Setup of Linear Units Readout
423
Frequently Asked Questions Concerning FFT
425
Chapter 13 AUD (Optional)
431
Connecting the Test System
432
Selecting the 824-AUD Operation Mode
433
Microphone Sensitivity Calibration
434
AUD Modes
434
View Menu
435
SLM/RTA Submenu
435
FFT Submenu
435
Pulse/Fm Submenu
435
Display Sequence
436
SLM+RTA Live Display
436
SLM+RTA Live Check Menu
437
Any Level -A, -B and -C Displays
438
Any Level Check Menu
439
Linearity RTA Display
440
Manual Lock
442
Linearity RTA Check Menu
443
Linearity FFT Display
444
Manual Lock
446
Automatic Lock
446
Linearity FFT Check Menu
447
Flatness FFT Display
448
THD Display
449
Pulse/Fm Display
451
THD Check Menu
451
Pulse/Fm-A Display
452
Pulse/Fm Check Menu
454
Pulse/Fm-B Display
454
FFT Display
455
Advertisement
Larson Davis System 824 Reference Manual (536 pages)
Sound Level Meter
Brand:
Larson Davis
| Category:
Measuring Instruments
| Size: 3 MB
Table of Contents
Table of Contents
5
Chapter 1 Introduction
19
About this Manual
19
About this Chapter
21
Formatting Conventions
21
Features
22
System 824 Components
25
System Diagram
28
Getting Started
28
Unpacking and Inspection
30
Accessories and Optional Equipment
30
Connecting Internal or External Power
31
Using the Nimh Battery Pack
32
Using Alkaline Batteries
32
Using the AC Power Adapter
33
Chapter 2 Overview
35
System 824 Setups or Instrument Definitions
35
Instrument Definition (ID) Types
36
Slm&Rta (Ssa)
36
Slm (Ism)
38
Logging (LOG)
38
Selecting a Measurement Setup
39
Performing a Measurement; SLM&RTA (SSA) Example
40
Stop, Pause and Back Erase Functions
41
Stopping and Starting Measurements
41
Pausing Measurements
41
Back Erasing
42
Changing the Detector of the Displayed SPL Value
42
Changing the Frequency Weighting of the Displayed SPL Value
43
Changing the Displayed Secondary Parameter
43
Changing the Frequency Weighting of the Displayed Lpeak Value
44
Changing the Amplitude Range, or Input Gain
44
Views
45
Selecting a VIEW
45
Data Storage and Recall
47
Storing Data
47
Recalling Data
47
Calibration
48
Chapter 3 Front Panel Keys; Their Functions and Menus
51
Power Key
53
Power-Up the Instrument / Viewing PWR Display
54
Power Settings
56
Extra Notes on Power Conservation
58
Run/Stop Key
59
Reset Key
59
Pause Key
60
Pause
60
Pause, Back Erase
60
Preview
61
Arrow Keys
61
Check Key
62
View Key
62
Data Key
63
Setup Key
64
Save ID
66
Title
66
ID Name
66
Write Protect, Delete, Write Enable Ids
66
Tools Key
67
About
69
Calibration
72
Clock/Timer
73
Memory
77
Deleting Stored Data
78
Delete Last Function
78
824 Memory Structure
79
Deleting the Last Stored Record
79
Deleting Individual Records
81
Power Monitor
82
Communication
83
Print Key
86
Chapter 4 Quick Start
89
Turning on and Calibrating the System 824
89
Taking Measurements and Storing Data
91
SLM&RTA Measurements
91
Viewing RTA Displays During a Measurement
94
Recalling Stored Data
96
Selecting and Modifying Instrument Definitions (Ids)
98
The Setup Menu
99
The Active ID
99
Menu Scrolling
100
Permanent Ids
101
Write-Protected Ids
101
Preparing for a Measurement
102
Selecting a Different ID
102
Accessing the Settings Menu
102
Accessing the Settings Menu to Initiate Editing or Modification
104
Setting Control in the SLM View
107
Chapter 5 System 824 Virtual Instruments
109
System 824 Virtual Instruments
109
Selecting an Instrument ID
111
Combined SLM&RTA
111
SSA Measuring Ranges
112
AC/DC Output
113
Logging SLM
114
Time History
115
Interval History
115
Exceedances
115
LN Percentiles (Broadband)
116
LN Percentiles (Spectral)
116
Sound Exposure
117
LOG and ISM Measuring Ranges
117
Chapter 6 System 824 Views
119
Status Icons and Indicators
120
General Views
122
SLM Views
122
Any Data View
125
Any Level Format
125
Any Time Format
125
Any Impulse Format
126
SSA Specific Views
127
SSA Displays
129
RTA Displays
129
Tabular RTA Views
129
Time History Displays
130
SSA Time History
134
Run Log
137
Ln Centiles
137
Logging SLM Specific Views
141
Current SLM and Overall SLM Views
143
Current Slm/Overall SLM Display-A (SPL)
144
Current/Overall SLM Display-B (Times)
146
Current/Overall SLM Display-C (Min/Max)
147
Current/Overall SLM Display-D (Peaks)
147
Current/Overall SLM Display-E (TWA)
148
Exposure Views
149
Exposure Display-A
149
Exposure-B Display
151
Exposure-C Display
152
Ln Centiles Views
153
Ln-A Display
153
Ln-B Display
154
Stats Views
155
Stats-A Display
155
Stats-B Display
156
Stats-C Display
157
Run Log (LOG & SSA)
158
Time History
159
Intervals
161
Intervals-A Display
161
Intervals-B Display
162
Intervals-C Display
164
Intervals-D Display
165
Intervals-E Display
166
Exceedance History
167
Excd-A Display
167
Excd-B Display
168
Excd Time History Display
169
Daily Views
171
Daily-A Display
171
Daily-B Display
173
Hourly Leq Display
174
Metrics
175
Metrics-A Display
175
Metrics-B Display
176
Passby
177
Chapter 7 Using ID Setting Files
181
Recalling ID Setting Files
181
Customizing Settings
182
Settings Example - SLM&RTA (SSA)
182
Settings Descriptions
184
Common SLM Settings
185
Title Setting - (SSA, LOG, ISM)
185
Detector Setting - (SSA, LOG, ISM)
185
Weighting Setting - (SSA, LOG, ISM)
186
Gain Setting - (SSA)
186
Range Setting - (LOG, ISM)
186
Transducer Setting - (SSA, LOG, ISM)
187
Random Incidence Microphone Correction
188
Pk Weighting - (SSA, LOG, ISM)
188
RTA Detector Setting - (SSA)
188
RTA Weighting - (SSA)
189
Bandwidth Setting - (SSA)
189
Common Control Settings
189
AC/DC Output Settings - (SSA, LOG, ISM)
191
Logic Input Setting - (SSA, LOG, ISM)
191
Logic Output Time Setting - (SSA, LOG, ISM)
193
Logic Output #2
194
Logic Output #2 Time Setting
194
Heater on
194
E. A. Cal Tone
194
Logging SLM TWA Settings
195
Ovll Exchange - (LOG)
195
Ovll Threshold - (LOG)
196
Ovll Criterion - (LOG)
196
Criterion Time - (LOG)
197
Crnt Exchange - (SSA, ISM, LOG)
197
Crnt Threshold (SSA, ISM, LOG)
198
Crnt Criterion (LOG)
198
LOG and SSA Ln Settings
198
Enable Ln
199
Start Level
199
Spectral Ln's (SSA Only)
200
Ln's
200
LOG and SSA Triggering Settings
201
SPL Excd Lvl 1 - (LOG, SSA)
201
SPL Excd Lvl 2 - (LOG, SSA)
201
PK Excd Lvl 1 - (LOG, SSA)
202
Pk Excd Lvl 2 - (LOG, SSA)
202
Hysteresis - (LOG, SSA)
202
LOG and SSA Time History Settings
203
Hist Enable - (LOG, SSA)
205
Hist Period (LOG, SSA)
205
Period Units - (LOG, SSA)
205
Other Level - (LOG Only)
206
Resolution - (LOG, SSA)
207
Advanced Time History - (LOG, SSA)
207
Marker Text - (LOG, SSA)
208
LOG and SSA Interval Settings
208
Intv Enable - (LOG, SSA)
209
Intv Period - (LOG, SSA)
209
Intv Time Sync - (LOG, SSA)
210
Intv Save Ln's - (LOG, SSA)
210
Intv Auto Stop - (LOG, SSA)
210
Intv Threshold - (LOG, SSA)
211
Intv Exchange - (LOG, SSA)
211
Intv Spectrum - (SSA Only)
212
Logging SLM Exceedance History Settings
212
Triggering - (LOG)
212
Excd Enable - (LOG)
212
Min Duration - (LOG)
212
Excd Time Hist - (LOG)
213
Period - (LOG)
213
Excd Trigger - (LOG)
213
Excd Time - (LOG)
213
Logging SLM Daily History Settings
214
Daily Enable - (LOG)
214
Daily Ln's - (LOG)
214
Logging SLM Define Report Settings
214
Data Report - (LOG, SSA)
215
Setup Report - (LOG, SSA)
215
SPL Histogram - (LOG)
216
Pk-1 Histogram - (LOG)
216
Pk-2 Histogram - (LOG)
216
Intv Report - (LOG, SSA)
216
Hist Report - (LOG, SSA)
217
Menu Layout of SSA Settings
217
Menu Layout of Integrating SLM (ISM) Settings
223
Menu Layout of Logging SLM Settings
226
Check Menus
232
Check Menu Example
233
SLM Check Menu Options (SSA and LOG)
235
Mark Display
235
Graph Menu
237
Settings
237
Controls Settings Menu
238
Other SSA Check Menus
238
Any Data Check Menu
238
RTA Check Menu
239
Intervals Check Menu
240
Time History Check Menu
241
Run Log Check Menu
242
Ln Centiles Check Menus
243
Other Logging (LOG) Check Menus
246
Any Data Check Menu
246
Current SLM / Overall SLM Check Menu
246
Exposure Check Menu
246
LN Centiles Check Menu
247
Stats Check Menu
248
Run Log Check Menu
248
Time History Check Menu
249
Intervals Check Menu
249
Excd History Check Menu
250
Daily History Check Menu
251
Chapter 8 Printing a Report
253
Connecting the 824 to a Serial Printer
253
Printing Reports
254
Defining and Printing Tailored Reports
257
Using the Recall Format (SSA and LOG Instruments Only)
259
Default Settings Values for the Recall Format Reports
260
Printing a Custom Report
274
Chapter 9 Using the 824 Utility Software
279
824 Utility Software Overview
279
824 Utility Installation
279
Starting the 824 Utility Software
280
Connecting the 824 to Your Computer
280
824 Utility Tool Bar
282
824 Utility Setup Window
284
Retrieving Setups from the 824
285
Modifying and Storing Setups to the 824
287
Manipulating a Setup
288
Saving Setups to Disk Files
290
Opening Setup Disk Files
290
Creating a New Setup
292
Renaming an Existing Setup
293
Deleting an Existing Setup
294
Locking and Unlocking Setups
295
Downloading Measurement Data
295
Specifying a Destination File
296
Changing the Download File Name
298
Adding Notes to a Download File
299
Selecting Active Measurements or Data Files
299
Downloading the Measurement
300
Explanation of Files in the 824 Utility Directory
302
Translating Measurement Data from a Downloaded Binary File
303
Selecting a Data Set to View
305
Printing a Translated File
307
Viewing a Translated File Within a Spreadsheet Program
309
Additional Features
310
Chapter 10 RTA (Optional)
315
Settings Menu
316
Settings Descriptions
319
RTA Settings Menu
319
Autostore Settings Menu
321
Arm Settings Menu
322
Trigger Settings Menu
324
End Settings Menu
325
Then Settings Menu
326
Trigger Settings Menu (Continued)
327
RTA Settings
329
RT60-A and RT60-B Instrument Definition
329
Rooms RTA Instrument Definition
331
RTA Views
332
Display Views
332
Trigger Views
336
Autostore Views
338
Autostore Bytime Spectral History
342
Bytime Spectrum Check Menu
343
Bytime Graph Check Menu
344
Rt-60
347
RT60 Check Menu
348
Spatial Avg Views
348
Spatial Avg Check Menu
350
Avg History Check Menu
351
Rooms Views
352
Chapter 11 FFT (Optional)
357
Features
357
Settings Menu
357
Settings Descriptions
359
FFT Display
362
Fft
362
FFT Check Menu
364
THD (Total Harmonic Distortion)
364
Reference Manual
364
THD Check Menu
366
Snapshot Check Menu
367
Entering Linear Units
368
Chapter 12 AUD (Optional)
373
Selecting the 824-AUD Operation Mode
374
SLM+RTA Mode
375
SLM+RTA Live Screen
375
Any Level-A Screen
376
FFT Mode
377
FFT Screen
377
THD (Total Harmonic Distortion)
378
Linearity
381
Pulse/Fm Mode
383
Pulse/Fm-A Screen
383
Pulse/Fm-B Screen
386
Pulse/Fm Check Menu
387
Larson Davis System 824 Training Manual (143 pages)
Analyzer and Precision Sound Level Meter
Brand:
Larson Davis
| Category:
Measuring Instruments
| Size: 0 MB
Table of Contents
Table of Contents
3
Chapter 1 System 824 Overview
5
User Interface
7
General Description
5
Chapter 2 Setup S
11
Simple Sound Analyzer (SSA)
11
Chapter 3 View
25
Any Data
25
RTA Live, RTA Max, and RTA Leq
30
Chapter 4 Data D
39
Chapter 5 Tools T
43
About
43
Calibration
47
Modifying the Calibration Level
52
Clock/Timer
53
Timer
57
Memory
64
Lock
66
Power Monitor
67
Communication
76
Chapter 6 Log - Logging Sound Level Meter (Option 01)
81
Current SLM
82
Modifying the SLM Settings
84
Stats
89
Modifying the STAT Settings
90
Ln Centiles
91
Modifying the Ln Settings
92
Exposure
95
Modifying the Exposure Settings
96
System 824 Training Manual
98
Overall SLM
98
Modifying the Overall SLM Settings
100
Run Log
101
Time History
102
Modifying the Time History Settings
102
Viewing Time History Data
109
Intervals
111
Modifying the Interval Settings
112
Viewing Interval Data
119
Exceedance History
121
Modifying the Exceedance History Settings
122
Viewing Exceedance History Data
130
Spectra Intervals
133
Viewing Spectra Intervals
137
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Larson Davis System 824 Training Manual (66 pages)
sound level meter
Brand:
Larson Davis
| Category:
Measuring Instruments
| Size: 1 MB
Table of Contents
Table of Contents
3
What You will Learn
7
Battery Life
8
Power Key Functions
8
Powering on the 824
8
An Acoustic Chameleon
9
LCD Screen Backlight
9
LCD Screen Contrast
9
Viewing Instrument Ids
10
Navigating the Menus
11
Arrow Keys
13
Check Key
13
Let's Push some Buttons
13
SSA Measurements
14
Time History
14
Interval History
16
Broadband Measurements
17
Lets Go for a Test Drive
19
Rta
19
Slm
19
Intervals
20
Time History
20
Calibration
23
Resetting Data
23
SLM Data
23
Taking a Measurement
23
Viewing Data from the 824 Screen
23
Recalling Data
24
RTA Data
24
Storing Data
24
Download Data Using 824 Utility Software
25
Downloading the Data
26
Translating the Data and Looking at the Reports
28
Content of Reports
29
Exporting Data
29
Printing a Report
29
Reports (824 Utility Software)
29
Summary Report
29
Time History Report
31
Interval Report
32
Chapter 2 Environmental Measurements
33
Environmental Noise
33
Types of Environmental Noise
33
Why Measure Community Noise
35
What Does the LOG Instrument Measure
36
Time History
36
Interval History
38
Special Advanced Feature
39
Time Synchronization
39
Exceedance History
40
Exceedance Time History
42
Setting the Parameters for an Exceedance History
43
Excd Enable (Yes)
44
Min Duration (000)
44
Excd Time-Hist (Yes)
44
Period (032)
44
Excd Trigger (Level)
44
Excd Time (Start)
44
Viewing Exceedance History Data on the 824
46
Excd-A
46
Excd-B
46
Time History
47
Passby Exceedance
47
Passby Measurement
48
Daily History
48
Explanation of Ldn and CNEL
49
Hourly Statistics
49
Hourly Leq
50
Background Leq
50
Hourly Excd Leq
50
Metrics
50
DNL (Ldn)
51
Cnel
51
Background Leq
51
Excd Leq
51
RT60 Measurements
53
What Is an RT60 and How Is It Measured
53
RT60 Defined
53
How Does My 824 Measure an RT60
54
Taking an RT60 Measurement
55
Exciting the Room
55
Setting up the 824 for an RT60 Measurement
55
RT60-A and RT60-B Setups
55
Advanced RT60 Measurements
59
Triggering
59
Customizing the Trigger Menu
61
Averaging
61
End Time
62
Trigger and Arm Levels
62
Autostore Display
62
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