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ШМ-1 BL-1 sound level meter.

ШМ-1

34 999 RUB
16 800 UAH
available:
2 pieces

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Sound Level Meter SHM-1 (SHM1, SHM 1)
 
Sound Level Meter CMM-1 consists of a measuring instrument PI-14 and the capsule condenser microphone M-101 is designed to measure the sound level and has a frequency response of A and C.
The sound meter is used for measuring noise in industrial plants, cities and other settlements.
 
Technical characteristics of the instrument sound level meters CMM-1:
 
Normal conditions of use:
- Ambient temperature - 20 º C ± 5 ° C;
- Relative humidity - 65% ± 15%;
- Atmospheric pressure - 100kPa ± 4kPa (750mm.rt.st. ± 30mm.rt.st.;
Working conditions of use:
- Ambient temperature - from -10 º C to +40 ° C;
- Relative humidity - 90% at a temperature of 30 ° C;
- Atmospheric pressure - 86kPa 106kPa-(650mm.rt.st.-800mm.rt.st.);
Frequency range - 20Hz-8000Hz;
The frequency characteristics of A and C sound level meter, the instrument correspond to BL-1 Table 1;
 
Table 1: Frequency response of A and C sound level meter instrument CMM-1
 
Rated frequency, Hz
Relative frequency response sound level meter. DB
Maximum deviation dB
And
C
20Hz
-50.5 DB
-6.2 DB
± 3,0 dB
25Hz
-44.7 DB
-4.4 DB
± 3,0 dB
31.5 Hz
-39.4 DB
-3.0 DB
± 3,0 dB
40Hz
-34.6 DB
-2.0 DB
± 2,0 dB
50Hz
-30.2 DB
-1.3 DB
± 2,0 dB
63Hz
-26.2 DB
-0.8 DB
± 2,0 dB
80Hz
-22.5 DB
-0.5 DB
± 2,0 dB
100Hz
-19.1dB
-0.3 DB
± 1,5 dB
125Gts
-16.1 DB
-0.2 DB
± 1,5 dB
160Hz
-13.4 DB
-0.1 DB
± 1,5 dB
200Hz
-10.9 DB
0dB
± 1,5 dB
250Hz
-8.6 DB
0dB
± 1,5 dB
315Gts
-6.6 DB
0dB
± 1,5 dB
400Hz
-4.8 DB
0dB
± 1,5 dB
500Hz
-3.2 DB
0dB
± 1,5 dB
630Gts
-1.9 DB
0dB
± 1,5 dB
800Hz
-0.8 DB
0dB
± 1,5 dB
1000Hz
0dB
0dB
± 1,5 dB
1250Gts
0.6 dB
0dB
± 1,5 dB
1600Gts
1.0 dB
-0.1 DB
± 2,0 dB
2000Hz
1.2 dB
-0.2 DB
± 2,0 dB
2500Gts
1.3 dB
-0.3 DB
± 2,5 dB
3150Gts
1.2 dB
-0.5 DB
± 2,5 dB
4000Hz
1.0 dB
-0.8 DB
± 3,0 dB
5000Hz
0.5 dB
-1.3 DB
± 3,5 dB
6300Gts
-0.1 DB
-2.0 DB
± 4,5 dB
8000Hz
-1.1 DB
-3.0 DB
± 5,0 dB
 
The frequency response of the free field to meet the requirements of Table 1 with the frequency response;
Frequency response sound level meter instrument BL-1 to diffuse field meets the requirements of Table. 1 for the frequency response of C;
The frequency response of pressure corresponds to the requirements of Table 1. For the frequency response of C, minus the diffraction correction given in Table.2;
 
 
Table 2 Diffraction correction unit sound level meter, BL-1
 
Frequency
250Hz
315Gts
400Hz
500Hz
630Gts
800Hz
1000Hz
1250Gts
The diffraction correction
0dB
0dB
0.1 dB
0.15 dB
0.2 dB
0.4 dB
0.6 dB
0.8 dB
Frequency
1600Gts
2000Hz
2500Gts
3150 Gts
4000 Hz
5000 Hz
6300 Gts
8000 Hz
The diffraction correction
1.1 dB
1.3 dB
1.6 dB
2.3 dB
2.9 dB
4.1 dB
5.6 dB
8.2 dB
 
Changes in the level of sensitivity of different angles of incidence of the sound wave relative to the reference value when the direction is in the range given in Table. 3 for a range of angles from +90 º to -90 °;
 
Table 3 Changes in the level of sensitivity of different angles of sound wave sound-level meter instrument BL-1 with respect to the reference value at the direction of
 
Frequency
from 31.5 Hz to 1,000 Hz
from 1000Hz to 2000Hz
from 2000Hz to 4000Hz
from 4000Hz to 8000Hz
Limiting changes in the level of sensitivity
3.0 dB
5.0 dB
8.0 dB
14.0 dB
 
Linearity of the amplitude of the amplifier and the measuring device relative to the reference sound level does not exceed the values ​​listed in Table. 3a;
 
Table 3a Linearity amplitude of the amplifier and the measuring device relative to the reference sound level meter, sound level instrument CMM-1
 
Deviation in amplitude
in the range of scales
± 1,0 dB
in the range of overlap
± 1,5 dB
 
The maximum permissible deviation of the amplitude characteristic between the levels, the difference does not exceed 10 dB does not exceed:
1) to measure the difference between the levels of 1 dB - ± 0,3 dB;
2) measuring the difference in levels to 10 dB - ± 0,6 dB;
3) overlap for the difference in levels of 5dB - ± 1,5 dB;
The upper limit of the dynamic range of the instrument sound level meter, BL-1 - at least 130dB;
Deviation of the real dependence of the output signal when the input signal - no more than ± 1dB;
The lower limit of the dynamic range of the instrument sound level meter, BL-1 - less than 30dB;
Noise level - not less than 5 dB below the lower limit of dynamic range;
Gain control range - not less than ± 3,0 dB;
The error limits of measurement with respect to the switch of 80 dB when you switch - no more than ± 0,7 dB;
The error of the grading scale of the instrument sound level meter, BL-1 in the working range - less than ± 1,0 dB;
Characteristics of Rectifier - square with crest factor 3;
Maximum deviation readings - no more than ± 1,0 dB;
Sound Level Meter is the temporal characteristics of F (fast) and S (slow) according to the Table. 3b;
 
Table 3b Timing in the F (fast) and S (slow) sound level meter instrument CMM-1
 
Time response
The frequency of the pulse
Pulse duration
The difference in readings
The limiting deviation of the
S (slow)
from 1000Hz to 2000Hz
Infinity
500ms
0dB
-4.1 DB
0dB
± 2,0 dB
F (Fast)
from 1000Hz to 2000Hz
Infinity
200ms
0dB
-1.0 DB
0dB
1.0 dB, -2.0 dB
 
Additional error due to the connection of additional devices with an input resistance of 10 ohms, no more than ± 0,5 dB;
Sound Level Meter has an electrical and acoustic calibration;
Indication when the power is always sound level meter, BL-1 under constant external conditions and not later than 10 minutes after its inclusion does not change within 1 hour by more than ± 0,5 dB;
Equivalent sound level when exposed to an alternating magnetic field of 80 A / m at a frequency of 50 Hz - not more than 50 dB;
THD at output jack does not exceed 10% in the frequency range from 200Hz to 1000Hz, with an upper limit of measurement;
Additional error of the instrument sound level meter, GL-1 from the ratio of harmonics at frequencies above 31.5 Hz at the upper limit of each range does not exceed ± 1 dB;
Equivalent sound level caused by wind speeds in the range of air flow 1m/s-8m/s, no more than 80dB;
When placing the unit sound level meter, BL-1 in the sound field with a level of 106dB his testimony when replacing condenser microphone capsule equivalent falls not less than 40 dB;
The maximum permissible sound level meter error at the reference frequency due to temperature, the operating temperature range from -10 º C to +40 ° C - no more than ± 0,5 dB;
The maximum permissible sound level meter error due to the humidity from 65% to 90% at 40 ° C - no more than ± 0,5 dB;
The maximum sound level meter reading device BL-1, due to exposure to vibration with an acceleration of 1m / s in the frequency range from 20Hz to 1000Hz - no more than 70 dB;
Continuous operation sound level meter, including the time for establishing the operating mode for 5 minutes, at least 8 hours;
Sound Level Meter can withstand the mechanical impact:
- Vibration frequency 10Hz-70Hz with maximum acceleration 2m/s-40m/s;
- 10-50 beats per minute at maximum acceleration of 50 m / s, pulse width 6.0 ms-12, 5 ms;
- The total number of strokes - 1000;
- In the extreme conditions of transportation of the unit sound level meter, a stand-CMM 80-120 beats per minute with a maximum acceleration of 30 m / s with duration of exposure to 2 hours;
Average life - 8 years.


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