- Response switch
OFF - switches
meter off
F position - selects Fast time
weighting
S position - selects Slow time
weighting
IR position - selects the
impulse reset control when using I setting
I position - selects Impulse
time weighting
- Range switch
A HI - selects
the 'A' frequency weighting over the range 65 to
135 dB
A LO - selects the 'A' frequency
weighting over the range 30 to 100 dB
C LO - selects the 'C' frequency
weighting over the range 30 to 100 dB
C HI - selects the 'C' frequency
weighting over the range 65 to 135 dB
- Mode switch
SPL - selects the
instantaneous sound pressure level display
MAX - selects the maximum sound
level hold display
BATT - selects the battery check
function
- CAL
adjustment potentiometer for acoustic
calibration using CEL-282 Calibrator
- 3.5 mm jack socket on bottom of instrument
provides
both analog ac and dc output signals to other
pieces of equipment
- use the ac output for tape recording or to view
waveform on CRT screen
- output voltage 7.25 V rms for full scale
deflection
ac signal on tip and ground on sleeve
- use the dc output to pass the sound signal to a
datalogging system on a PC
- output voltage 25 mV per dB not exceeding 6 V
for full scale
dc signal on ring and ground on sleeve
