BRUEL & KJAER 2221 User Manual

Leq RANGE:
MODE:
6
Leq
dB(A)
25-85
45-105
65-125
85-145
"Max. Hold Fast" (2221 only): Holds the maximum RMS signal value
measured with the standardized "Fast" time weighting until the meter is
reset.
(See Chapter 5).
"Max. Hold Slow" (2222 only): Holds the maximum RMS signal value
measured with the standardized "Slow" time weighting until the meter is
reset.
(See Chapter 5).
"Max. Hold Peak": Holds the maximum "Peak" value until the meter is
reset. Rise
time is <30 f..LS.
Switching the FUNCTION selector automatically resets the instrument
except between Leq and SEL positions. Leq• SEL and Max. Hold "Fast/S-
low" measurements are A-weighted, while Max. Hold "Peak" is made
with a Linear (flat) weighting. The weighting selection is made automati-
cally by the FUNCTION selector, and "A" or "L" appears on the display
as a reminder.
Four position slide-switch providing four overlapping measuring
ranges. See Table 2.1.
Max. Hold "Fast/Slow"
Max. Hold "Peak"
dB(A)
dB{ lin.)
40-85 55-88
60-105
60-108
80-125
80-128
100- 145
100-148
8 111 32
Table 2. 1. Measuring ranges for the differents functions
The measurement ranges obtained are different depending on which
function is selected. SEL and Leq measurements use the same ranges;
note however, that for SEL measurements the range values applies to
the instantaneous RMS level and not to the SEL value displayed. When
switching between measuring ranges, the instrument is automatically
reset.
Two position slide-switch with the following functions:
"Run": Normal operating mode. The measurement selected by the
FUNCTION switch is then in progress.
"Pause": Interrupts the measurement when in Leq or SEL function.
Measurement will be continued when returning to "Run".
For Max. Hold functions it freezes the display. A higher level occuring
while in "Pause" position is held by the max. hold circuit and displayed
when returning to "Run".

BRUEL & KJAER 2221 Specifications

General

Brand	BRUEL & KJAER
Model	2221
Category	Measuring Instruments
Language	English