Sound Level Meter - Maxtech

Precision Integrating Sound Meter & Calibrator
NIST it
Modern microprocessor technology and an efficient practical
design make this instrument extremely versatile and easy to
use, at a very reasonable price.
Both manual and automatic octave band analysis are provided
by the optional filter sets. The Model 1800 also can be interfaced
with the analysis of occupational, environmental, and other
noise measurements.
Precision accuracy, outstanding features and versatility in a
durable lightweight housing, coupled with the highest quality
and support make the Model 1800 the first choice in sound level
meters for virtually any application.
• Type 1 accuracy for precision noise measurement and statistical analysis
• For industrial, community, R & D, and audiometric applications
• Easy to read LCD digital readout plus additional Quasi-Analogue display
• AC and DC outputs for recording
• RS-232 digital outputs to printers, computers, and NL-15 data logger
• Modular design allows choice of 1/1 and combination 1/3-1/1 octave filter sets
• Optional accessory allows vibration measurement and analysis
• Direct readout of SPL, Leq, SEL, Peak, Impulse, Lmax, Lmin, Levels and Run Time
• NIST Certification Included
®
S
Sound Level
Catalog No. Model Description Price
QS138180022 1800-20 Precision Integrated SLM with $3,535.00
QC-20 calibrator
Options
QS1389941 OB300 Octave Band Filter, 1/3 - 1/1 1,780.00
QS2010 OB100 Octave Band Filter, 1/1 865.00
QS1389944 VA-508C Vibration assembly for vibration velocity 980.00
displacement & acceleration
NISTSD4 — NIST Traceable Certificate with Data 285.00
SPECIFICATIONS
MODEL 1800 SOUND LEVEL METER
Range
Meter only: 20 to 140dB. With filter sets: 0 to 140dB. (Other levels possible with optional micro
phones; noise floor varies depending on microphone type and filter selection)
Standards Meets or exceeds ANSI S1.4 Type 1 and relevant section of IEC 651 Type 1 (1) and IEC 804
Microphones
Removable precision 1 ⁄2" prepolarized condenser (electret) microphone is standard. Optional
1
⁄2" and 1" condenser and other microphones available
Preamp
Removable; input impedance is greater that 1G ohm in parallel with 2 pf. Preamp will drive up
to 100 feet of cable
Polarization
Regulated 200VDC ±2% when using ordinary condenser microphones, switched off when
using prepolarized condenser (electret) microphones
Meter Input
Input impedance is 1 MΩ in series with 0.1 MFD. Maximum sinusoidal input voltage is 10V RMS
AC Output
3.16V RMS at full scale (60dB). (3.8V RMS maximum) Output impedance is 32K Ω
DC Output
0 to 1.00VDC; 60dB span. Each 0.167V change equals 10dB
Print Output
Serial output to printers or computers using RS-232 voltage levels. Selectable baud rates of
300, 600, 1200, or 2400. ACSII character format
Data Output
Output transmission of real-time digital data st rate of 16 times per second using RS-232
voltage levels to Quest data loggers
Detector
True RMS; 63dB pulse range
Overload Indication Displays overload condition via annunciator on LCD and annotates them on printout
Frequency Range 4Hz (-3dB) to 50kHz (-3dB) or linear weighting
Frequency Weighting A, B, C, and Linear. When using OB-100 or OB-300 filter sets, any one of the weightings
Networks
may be selected
Display
3 1 ⁄2 Digit :Liquid Crystal Display with additional Quasi-Analogue 60dB indicator in 2dB incre
ments. Level display to 0.1dB resolution. Time display of Min:Sec or Hr:Min. Annunciators for
battery check, hold, run, and overload indications
Meter Response
Slow, fast, impulse, and peak (onset time constant less than 50µs.) (Peak measurements may
be A, B, C or Linear)
Modes of Operation As an integrated sound level meter, calculates sound pressure level (SPL), maximum level
(MAX), minimum level (MIN), sound exposure level (SEL), and equivalent level (Leq). Also
measures peak and impulse levels
Temperature Range Operation: -10°C to +50°C. Storage (less batteries): -20°C to +60°C
Effect of Magnetic Fields A magnetic field of 1 Oersted (80A/m) at 60Hz produces a maximum reading of 40dB on linear
weighting
Effect of Electrostatic Fields Negligible as long as protection grid is kept on microphone
Batteries
Two 9-volt batteries (NEDA 1604A-Alkaline) will provide approximately 20 hours of continuous
operation (10 hours with optional filter sets) at 25°C
Tripod Mount
Threaded insert on back of meter accepts a standard 1 ⁄4-20 tripod mounting screw
Size
3.3" x 8.2" x 1.8" (84 x 208 x 47mm) not including preamp height
Weight
24 oz. (680 grams) including preamp, half-inch microphone, and batteries
MODEL OB-300, 1/3 - 1/1 OCTAVE FILTER SET
Standards
ANSI S1.11, Order 3 AND IEC R225
Center Frequencies 33 frequencies from 12.5Hz to 20kHz
Frequency Selection Full manual control or automatic sequential stepping through each frequency band
Power Source
Sound Level Meter
Size
3.3" x 4.2" x 1.8" (84 x 107 x 47mm)
Weight
9 ounces (255 grams)
MODEL OB-100, 1/1 OCTAVE FILTER SET
Standards
ANSI S1.11, Order 3 and IEC R225
Center Frequencies 10 frequencies from 31.5Hz to 16kHz
Frequency Selection Full manual control or automatic sequential stepping through each frequency band
Power Source
Sound Level Meter
Size
3.3" x 2.8" x 1.8" (84 x 71 x 47mm)
Weight
6 ounces (170 grams)
1150
Davis Inotek Instruments
www.davis.com