User Manual

www.modalshop.com | 513-351-9919 | [e-mail]
831 Sound Level Meter and NMS
DS-0097 revG
Information including:
Please note that USB’s are used as a default, but G4 Utility software and 831 Manual are
also available for download from
www.larsondavis.com in the “Support” section.
Feel free to call us if you have any questions! [phone]
• This sheet as a reference
• 831 Operation Manual
• G4 Utility software
*Note*
• SLM Utility – G4 Operation Manual
• Calibration certs for each meter and microphone, and calibrator
•
Rental Tracking Sheet, includes serial numbers of units shipped
*Note*:
G4 LD Utility software is compatible with all 32 bit and 64 bit versions of Windows 7 and 8.1, and 10. The administrator of the PC must install G4 for successful installation. Rental laptops are
available with G4 software preloaded. Meter setup and data download services are also available.
CAL200 Calibrator with adapters (if
necessary), manual or instruction sheet.
Chapter 17 of the 831 Manual is short (<10
pages!) and covers calibration, including
meter screenshots.
ADP109 1/4 in adaptor
079A06
079A07
1/2" Mic Windscreen, 3.5” diameter or
1/4” Mic Windscreen, 3.5” diameter
Microphone (see table on right)
PRM831
Preamps ship in a protective case.
Included
EXC010
EXC020
EXC050
EXC series cable, 5 pin Switchcraft
extension cable, used as optional
extender between meter and preamp.
10, 20 and 50 ft lengths available.
CBL138
USB Cable USB A to Mini USB, connects
meter to computer or power.
PSA029
AC Power Adaptor.
Batteries
(4) AA rechargeable batteries. Batteries
may be installed in meter.
Microphone(s)
377B02 ships unless otherwise requested. Model 831 can apply
a digital correction factor to measure Random Incidence with a
Freefield Microphone (and the reverse). Units ship with case,
o-ring to mate between preamplifier and mic in outdoor use,
desiccant, and microphone guideline sheet.
Quantity
Microphone
Model
Size
Type
Noise
Floor
(dBA)
Low Range
Indicator
(dBA)
Overload
(dBpk)
377B02
1/2"
Freefield
17.1
26.2
143.5
377C20
1/2"
Random
15.3
24.4
143.5
377C01*
1/4"
Freefield
35.7
44.8
172.3
377C10*
1/4"
Pressure
36.3
45.5
178.8
377A12*
1/4"
Pressure
37.5
48.6
192.8
*Includes ADP043 1/4 inch microphone to 1/2 inch preamp adaptor
831 (Firmware revision 2.314 or higher)
Meter Options and Special Notes:
831-LOG Time History Logging (multi parameter, increments from 20ms to 24hr)
831-ELA Measurement History Logging: exceedance/events, intervals, and daily
831-OB3 Selectable real time 1/1 and/or 1/3 octave filter set
831-IH Industrial Hygiene: selectable standard doses (OSHA, ACGIH, NIOSH, IEC)
831-SR Sound Recording: level and dynamic based event recording and more
831-FST Fast time history logging 2.5, 5 and 10ms speeds (requires LOG and OB3)
831-FFT 400 to 6400 line FFT with selectable span 100Hz-20kHz with windowing
831-RT Reverberation Time room acoustics ( ISO 3382-2:2008 and ASTM E2235-
04)
831-LOWN Low noise configuration (include LOWN FAQ)
Preload Meter Setup: preload user specified measurement set up onto meter(s)
prior to shipment from The Modal Shop
Data Download from meter(s) upon return to The Modal Shop and electronically
send data to the following recipient(s):
Other:
Videos are available showing calibration and other helpful hints at - http://www.modalshop.com/rental/learn/acoustics/sound-level-meter-831
Job # _________________ Customer _________________________
First Rental Period
†
__________________________
†
Rental period starts the calendar date after shipment, and ends on date returned.
Rentals can be kept beyond the initial period, and are extended at the same period and rate.
Rentals returned in an extension period are billed at a net prorated basis based on return date.
Let us know if your company requires a new PO or payment method for extension charges.
This shipment contains ______ 831 kits.
Each kit includes one of each item in this section unless noted.
SECTION 1:
SECTION 1:
SECTION 2:
One accessory kit included for each family of
meter rented unless otherwise specified.
NOTE: Preamplifier release button