Model Prm831 - Larson Davis SoundAdvisor 831C Reference Manual

A.1.16 Data Storage Specifications
A.1.17 Electrostatic Discharge Specifications
A.1.18 Environmental Conditions Specs
A.1.19 Physical Characteristics
A.2 Model PRM831
The Larson Davis PRM831 is an electret microphone preamplifier for use with a Larson Davis Model 831 Sound Level
Meter. It requires little supply current and is capable of driving 300 feet of cable. The preamplifier operates over
wide ranges of temperature and humidity. It has very little attenuation for use with 50 mV/Pa sensitivity
microphones up to 140 dBSPL.
SoundAdvisor Model 831C
Power-On Time: < 2 minutes
Real-Time Clock: Documented Drift is <0.3 s drift per 24 hour period over full
operating temperature range with battery back-up power
Backup Time: 1 year rechargeable battery backup
Internal: 2 GB non-volatile flash memory dedicated to data and user setups
External: Up to 32 gigabyte USB Flash Memory Drive
The instrument is not adversely affected by electrostatic discharges.
Operating Temperature: –30 to +50°C (–22 to 122°F)
Storage Environment: –30 to +60° C (–22 to +158°F), less than 90% RH
Temperature Sensitivity: ≤ 0.5 dB sensitivity, –10 to +50°C (14 to 122°F) at 1kHz
Humidity Sensitivity: ≤ ±0.5 dB sensitivity, 25% to 90% relative humidity at 40°C
(104°F) at 1kHz
Dimensions:
• 290 x 71 x 41 mm (11.35") including microphone and preamplifier
• 224 x 71 x 41 mm (8.80") instrument body only
Weight:
• 531.6 g (18.8 oz) including batteries, preamplifier and microphone
• 489.2 g (17.3 oz) including batteries
A-8