131Appendix A

Communications ports

Auxiliary - For trigger signals and RS-232 communication.

USB - Mini USB connector. This port is used for data and file transfers between the instrument and a personal computer.

Measurements

Types

SPL measures - SPL, Average value (Lavg or Leq), Maximum value (LMx), Minimum value (LMn), Peak value (LPk).

Noise dosimetry - Sound Exposure Level (SEL), Time Weighted Average (TWA), Projected TWA (PTWA), Taktmaximal (TAKTMX), Dose, Projected Dose (PDSE), Exposure (EXP).

Community noise dosimetry - Exceedance (Ln), Day-Night average (Ldn), Community Noise Exposure Level (CNEL), SPL difference for “C” and “A” time response settings (Lc-a).

Overload Time (OL) - The percentage of time over the OL setting.

Ranges

Broadband - Eight selectable ranges of 90 dB each.

Filtered - Eight selectable ranges of 80 dB each.

Measurement parameters

Response time - Fast, slow and impulse.

Frequency weighting - A, C, Z and F (flat).

Threshold - 10 to 140 dB or OFF.

Exchange Rate (ER) - 3, 4, 5 and 6 dB.

Criterion Level (CL) - 40 to 100 dB.

Upper Limit (UL) - 10 to 140 dB.

Projected Time - 1 to 24 hours.

Models SE and DL

Page 144
Image 144
3M SE, DL user manual Measurements, Communications ports, Types, Ranges, Measurement parameters