Product Test Report:
CMC Cabinets – Thermal & Noise Performance
Issue A, February 2013
a, October 2012
Executive Summary
Eaton has undertaken a testing regime to determine the profile of the CMC Cabinet in regards to the thermal and
noise performance characteristics.
Eaton certifies that the CMC will comply with:-
°
The NES 50 dBA day / 40 dBA night noise limits at an ambient day of 35 C with a heat load of 220W in
the Misc Cabinet
Cabinet dimensions are 1790 mm (H) x 2310 mm (W) x 600mm (D)
Results
1. Noise and Heat Load – The noise levels for the cabinet is tabulated below for the heat load.
Max Equipment NES Noise Noise (from Back) @ 3 m Noise (from Back) @ 3 m
Heat Load (W) Permitted - Day o o
(20 C Amb Temp) (30 C Amb Temp)
(dBA LAeq @ 3m)
dBA dBA
220W 50 28.8 29.1
1. Testing method
Due to ambient noise and testing limitations, it was not possible to directly measure noise levels in the installed
system at Southbridge.
The CMC cabinet noise levels are directly related to heat exchanger fan speeds
This test relates noise levels measured against heat exchanger fan speed in a studio environment to actual fan
speeds in an installed system at Southbridge.
The measured fan speeds at Southbridge are put into the fan speed versus noise figures to show the actual noise
levels that would be found in the Southbridge site.
This data applies to a system with similar or lower power loads, and up to 31°C ambient temperature. Higher loads
and temperatures will result in increased fan speeds and hence increased noise.
Extrapolated noise levels at 35°C are still well within NES limits; higher power levels are expected to remain within
limits, but will require further testing.
Eaton Corporation,
Eaton Development Centre
1 Barry Hogan Place, PO Box 11-188
Christchurch 8443, New Zealand
tel: (+64) 3 343 3314
fax: (+64) 3 343 5660
Email: dc.info@eaton.com, www.eaton.com/telecompower Page 1 of 8
Eaton® is a trade name, trademark, and/or service mark of Eaton Corporation or its subsidiaries and affiliates. Other marks are the property of their respective owners.
© Eaton Corporation 2010. All rights reserved.
2. Noise Performance
Date of Tests: February 2013
Test Location: Whitebait Recording Studio 1
Tests performed by: Mike Nixon, Engineer, Eaton (Email: MichaelJNixon@eaton.com, Phone: 03-341-4961)
Product: CMC Type A
2.1 Test Equipment
Equipment Serial Number
Dawe D1422C Noise Meter 05514326 (calibrated till 8 Feb 2013)
Agilent 34970A Data Logger US37029085
The noise levels are recorded 1m off the cabinet. The background noise was 32dBA.
Front
Side B Side A
Back
2.2 Noise Test Results
Readings for the four positions at 1m in dBA, relative to fan speed control voltage:
FRONT dBA SIDE A dBA BACK dBA SIDE B dBA
2.0V 39.3 2.0V 36.4 2.0V 38.3 2.0V 36.4
3.0V 39.9 3.0V 37.5 3.0V 38.8 3.0V 37.5
4.0V 41 4.0V 39.5 4.0V 39.4 4.0V 39.2
5.0V 45 5.0V 43.6 5.0V 42 5.0V 44.1
6.0V 48.9 6.0V 45.8 6.0V 45.8 6.0V 47.9
7.0V 55.6 7.0V 50.3 7.0V 49.3 7.0V 50.7
8.0V 58.7 8.0V 51.4 8.0V 50.7 8.0V 53.5
9.0V 59.5 9.0V 53.9 9.0V 53 9.0V 55.8
10.0V 61.3 10.0V 55.3 10.0V 55.7 10.0V 58.9
Issue A, February 2013
Page 2 of 8
2.3 Noise Test Results Against Ambient Temperature
Cabinet Noise Amb. Resultant Fan Actual NES Noise NES Calculated
Direction Temperature Speed Recorded Permitted
o (dBA LAeq @
( C)
(V dc) (dBA LAeq @ (dBA LAeq @ 3m)
(Night / Day) *Note 1 1m) 3m) *Note 3
*Note 2
Back 20 / 31 1.1 / 2.3V 38.3 / 38.6 40 / 50 28.8 / 29.1
Front 20 / 31 1.1 / 2.3V 39.3 / 39.6 40 / 50 29.8 / 30.1
Notes:
1. Fan speeds from Figure 2.
2. In some cases, actual field fan speeds were lower than in the sound lab. In this case, the lowest sound lab
noise figures were used.
3. 3m values calculated as 1m values - 9.5dBA
2.4 Noise Test Results Against National Environmental Standards
The results above show that with the loading in the test cabinet (18A total), and up to 31°C, the cabinet noise is well
within the NES limits.
Issue A February 2013
Page 3 of 8
3. Thermal Performance
3.1 Internal Temperature Test Setup Sensor locations
1 Above centre RRH
2 Top of RRH cabinet
2 3 Power HX intake
4 Internal AC distribution
5 Beneath RRH centre
1 6 Ambient air intake Misc cabinet
7 Lower internal fan Misc cabinet
8 Centre of Misc cabinet
5
6
3
7
8
4
7
Figure 1 Temperature test probe locations 7
Issue A, February 2013
Page 4 of 8
3.2 Internal Temperature Test Results
Date Location Ambient Equipment supply Radiant surface heating
Temperature voltage and load current
February Southbridge trial site 20°C - 31°C CMC Type A Strong sunlight, unshaded
2013
Load current 18A total,
14A RRH units, 4A Misc
cabinet
Vdc
2.50
2.00
1.50
1.00
0.50 Vdc
0.00
2/14/201…
2/14/201…
2/14/201…
2/15/201…
2/15/201…
2/15/201…
2/15/201…
2/16/201…
2/16/201…
2/16/201…
2/16/201…
2/17/201…
2/17/201…
2/17/201…
2/17/201…
2/18/201…
2/18/201…
2/18/201…
2/18/201…
2/19/201…
2/19/201…
2/19/201…
2/19/201…
2/20/201…
2/20/201…
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2/21/201…
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Figure 2 Fan speed
Issue A February 2013
Page 5 of 8
10.00
15.00
20.00
25.00
30.00
35.00
40.00
45.00
0.00
5.00
2/14/2013 12:42:53 PM
2/14/2013 5:10:53 PM
2/14/2013 9:38:53 PM
2/15/2013 2:06:53 AM
2/15/2013 6:34:53 AM
2/15/2013 11:02:53 AM
2/15/2013 3:30:53 PM
2/15/2013 7:58:53 PM
2/16/2013 12:26:53 AM
2/16/2013 4:54:53 AM
Figure 3 Cabinet Temperatures
2/16/2013 9:22:53 AM
2/16/2013 1:50:53 PM
2/16/2013 6:18:53 PM
2/16/2013 10:46:53 PM
2/17/2013 3:14:53 AM
2/17/2013 7:42:53 AM
2/17/2013 12:10:53 PM
2/17/2013 4:38:53 PM
2/17/2013 9:06:53 PM
2/18/2013 1:34:53 AM
2/18/2013 6:02:53 AM
°C
°C
°C
°C
°C
°C
°C
°C
2/18/2013 10:30:53 AM
2/18/2013 2:58:53 PM
2/18/2013 7:26:53 PM
2/18/2013 11:54:53 PM
2/19/2013 4:22:53 AM
2/19/2013 8:50:53 AM
2/19/2013 1:18:53 PM
Power HX Intake
Misc cab centre
Above Center RRH
2/19/2013 5:46:53 PM
Top of RRH Cabinet
Beneath RRH Center
2/19/2013 10:14:53 PM
Lower Internal Fan Misc
2/20/2013 2:42:53 AM
2/20/2013 7:10:53 AM
Internal AC Distribution Box
Ambient Air Intake Misc cab
2/20/2013 11:38:53 AM
2/20/2013 4:06:53 PM
2/20/2013 8:34:53 PM
2/21/2013 1:02:53 AM
2/21/2013 5:30:53 AM
2/21/2013 9:58:53 AM
Issue A, February 2013
Page 6 of 8
3.3 Physical Dimensions
Width 2310 mm
Height 1790 mm
Depth 600 mm
Figure 4 CMC View with panels fitted
Issue A February 2013
Page 7 of 8
APPENDIX A: Noise Recording Results
CMC NOISE TEST - 4th FEBRUARY 2013
VOLTS 1M BACKGROUND NOISE 32db
2 38.3
2.5 38.8
3 39.4
4 42
5 45.8
6 49.3
7 50.7
8 53
9 55.7
10 57
VOLTS 1M REAR VOLTS 1M
2 36.4 2 36.4
HEAT EXCHANGER
2.5 37.5 E 2.5 37.5
3 39.5 Q 3 39.2
4 43.6 U 4 44.1
5 45.8 I 5 47.9
6 50.3 P 6 50.7
7 51.4 7 53.5
8 53.9 8 55.8
9 55.3 FRONT 9 58.9
10 57 10 61
VOLTS 1M
2 39.3
2.5 39.9
3 41
4 45
5 48.9
6 55.6
7 58.7
8 59.5
9 61.3
10 63.8
Issue A, February 2013
Page 8 of 8
