Cirrus Research CR:811C User Manual

CR:800C Series Sound Level Meter User Manual
Page 58
9 Appendix 1 Specifications
9.1 Instrument Versions
CR:811C Class 1
CR:812C Class 2
CR:821C Class 1 with 1:1 Octave Band Filters
CR:822C Class 2 with 1:1 Octave Band Filters
CR:831C Class 1 with 1:1 & 1:3 Octave Band Filters
CR:832C Class 2 with 1:1 & 1:3 Octave Band Filters
9.2 Applicable Standards
Sound Level Meter
IEC 61672-1:2002 Class 1 or 2 Group X
IEC 60651:1979 Class 1 I or Class 2 I
IEC 60804:1985 Class 1 or Class 2
ANSI S1.4 with NK:70 Random Incidence Adaptor Fitted
1:1 & 1:3 Octave Band Filters (where fitted)
IEC 61260 Class 1
9.3 Microphone
Class 1 MK:224 pre-polarized Free-field ½" Condenser
Class 2 MK:216 pre-polarized Free-field ½" Condenser
Random Incidence to ANSI S1.4 with NK:70 Adaptor
Capacitance 18pF
9.4 Microphone Preamplifier
Class 1 MV:200D Removable Preamplifier
Class 2 MV:200D Integral Preamplifier
9.5 Extension cables
ZL:202 2m
ZL:205 5m
ZL:210 10m
ZL:215 15m
ZL:220 20m
ZL:225 25m
9.6 Time Weightings
‘F‘ (Fast) to IEC 61672-1:2002 Class 1 or 2 Group X
‘S' (Slow) to IEC 61672-1:2002 Class 1 or 2 Group X
‘I' (Impulse) to IEC 61672-1:2002 Class 1 or 2 Group X
9.7 Frequency Weightings
Channel 1 ‘A', ‘C' or ‘Z'
Channel 2 ‘C' for Peak
Z weighting is a flat frequency response of 8Hz – 20kHz ±1.5dB excluding microphone
response. When either 1:1 or 1:3 Octave Band filters are selected the ‘Z' weighting is
used.

Cirrus Research CR:811C Specifications

General

Brand	Cirrus Research
Model	CR:811C
Category	Measuring Instruments
Language	English