BRUEL & KJAER 2221 User Manual

TRIPOD MOUNTING BUSH:
RANDOM
INCIDENCE
ADAPTOR:
WINDSCREEN:
8
"---" (or " P-- "): Displayed during the 0,5 s time delay after reset
(manual or automatic), and during underrange in Max. Hold.
measurements.
"T": Indicates that the current sound level is underrange. Switch Leq
RANGE to a lower range. The sign disappears when the sound level
exceeds the minimum range value.
"•": Indicates that an overload has occured since the last reset and the
displayed value may be incorrect. This warning only disappears with the
next reset.
"* ": Indicates that the time counter capacity has been exceeded dur-
ing Leq measurement. The Leq value displayed is incorrect, but the SEL
value remains correct. See section 3.5. 7 for conversion from SEL to Leq·
The sign will disappear with the next reset.
"BAT": Indicates that the power supply voltage is insufficient and that
batteries have to be changed. See section 3.2 for battery replacement.
"A": Indicates that A-Weighting is applied. It is automatically selected
by the FUNCTION switch when set for "Laq", "SEL" or Max. Hold
"Fast/Slow" measurements. See Chapter 5.
"L": Indicates that Linear (flat) weighting is applied. It is automatically
selected by the FUNCTION switch when set for Max. Hold "Peak"
measurement only.
A 1f4" UNC threaded bush located on the rear of the instrument for
tripod mounting
Modifies the linear 0° incidence free field frequency response of the
microphone to a linear random incidence response. See section 3.5.2.
Reduces the wind noise and protects the microphone against dust,
condensation and light precipitation. It is recommended for all outdoor
measurements.
Fig. 2. 7. Reverse side of the Sound Level Meter

BRUEL & KJAER 2221 Specifications

General

Brand	BRUEL & KJAER
Model	2221
Category	Measuring Instruments
Language	English