PR5000X011 Point of Sale Reader RF Exposure Info MPE Report Template Blackboard Inc.

Blackboard Inc. Point of Sale Reader

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Maximum Permissible Exposure Evaluation
For the
Blackboard, Inc.
PR5000
FCC ID: TMEPR5000X011
February 7, 2018
WLL Report: 15148-02 Rev 0
Prepared for:
BLACKBOARD, INC.
22601 N. 19TH AVE SUITE 200
PHEONIX, AZ 85027
Prepared by:
WASHINGTON LABORATORIES, LTD.
7560 LINDBERGH DRIVE
GAITHERSBURG, MARYLAND 20879
Testing Certificate AT-1448
Certificates and reports shall not be reproduced except in full, without the written permission of Washington Labs, Limited.
RF Exposure Test Report
Blackboard, Inc.
PR5000
January, 2018
Maximum Permissible Exposure Evaluation
For the
Blackboard, Inc.
PR5000
FCC ID: TMEPR5000X011
February 07, 2018
WLL Report # 15148-02 Rev 0
Prepared by:
Steve D. Koster
President
Reviewed by:
John P. Repella
Manager, EMC & Wireless Services
WLL Report #15148-02 Rev 0
- ii -
© 2018 Washington Laboratories, Ltd.
RF Exposure Test Report
Blackboard, Inc.
PR5000
February 2018
Abstract
This report has been prepared on behalf of Blackboard, Inc. PR5000 to document the findings of the
maximum permissible exposure evaluation on the Blackboard, Inc. PR5000. The purpose of this
evaluation is to establish a minimum safe distance as per the RF exposure requirements as defined in
FCC §1.1307 & §1.1310.
This report documents the results of testing to the requirements of:
•
CFR Title 47 Volume 1 Practice and Procedure; (1.1307) Environmental Assessments
The Evaluation was performed by Washington Laboratories, Ltd, 7560 Lindbergh Drive, Gaithersburg,
MD 20879. Washington Laboratories, Ltd. has been accepted as an EMC Conformity Assessment Body
(CAB) under the United States/European Union Memorandum of Agreement. Washington Laboratories,
Ltd. is accredited by ANAB under Testing Certificate AT-1448.
Revision History
Reason
Date
Rev 0
Initial Release
February 7, 2018
WLL Report #15148-02-MPE
- iii -
© 2018 Washington Laboratories, Ltd.
RF Exposure Test Report
Blackboard, Inc.
PR5000
February 2018
Table of Contents
Abstract ................................................................................................................................................................... iii
Introduction ................................................................................................................................................ 1
Requirements .............................................................................................................................................. 1
2.1
Transmitter Categories ............................................................................................................................. 1
2.2
Exposure Categories ................................................................................................................................ 1
Device Summary ......................................................................................................................................... 3
Radio Frequency Radiation Exposure Evaluation .................................................................................. 3
WLL Report #15148-02-MPE
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© 2018 Washington Laboratories, Ltd.
RF Exposure Test Report
Blackboard, Inc.
PR5000
February 2018
List of Tables
Table 1: MPE Limits ..................................................................................................................................................2
Table 2: Device Summary of the PR5000 ..................................................................................................................3
Table 3: Transmitter MPE Calculation Summary ......................................................................................................4
WLL Report #15148-02-MPE
-v-
© 2018 Washington Laboratories, Ltd.
RF Exposure Test Report
Blackboard, Inc.
PR5000
February 2018
Introduction
This report has been prepared on behalf of Blackboard, Inc. PR5000 Transmitter to show compliance
with the RF exposure requirements as defined in FCC §1.1307.
Testing supporting this evaluation was performed at Washington Laboratories, Ltd, 7560 Lindbergh
Drive, Gaithersburg, MD 20879. Washington Laboratories, Ltd. has been accepted as an EMC
Conformity Assessment Body (CAB) under the United States/European Union Memorandum of
Agreement. Washington Laboratories, Ltd. is accredited with ACLASS under Testing Certificate AT1448.
Requirements
Three different categories of transmitters are defined by the FCC in OET Bulletin 65. These categories
are fixed installation, mobile, and portable. Additionally, the FCC categorizes the use of the devices
based on the user’s awareness and the ability to exercise control over his or her exposure. The two
categories are defined as Occupational/Controlled Exposure and General Population/Uncontrolled
Exposure.
2.1
2.1.1
Transmitter Categories
Fixed Installations
A fixed location means that the device, including its antenna, is physically secured at a permanent
location and is not able to be easily moved to another location. Additionally, distance to humans from
the antenna is maintained to at least 2 meters.
2.1.2
Mobile Devices
A mobile device is defined as a transmitting device designed to be used in other than fixed locations and
to be generally used in such a way that a separation distance of at least 20 centimeters is normally
maintained between the transmitter's radiating structures and the body of the user or nearby persons.
Transmitters designed to be used by consumers or workers that can be easily re-located, such as a
wireless modem operating in a laptop computer, are considered mobile devices if they meet the 20
centimeter separation requirement. The FCC rules for evaluating mobile devices for RF compliance are
found in 47 CFR §2.1091.
2.1.3
Portable Devices
A portable device is defined as a transmitting device designed to be used so that the radiating structure(s)
of the device is/are within 20 centimeters of the body of the user. Portable device requirements are found
in Section 2.1093 of the FCC's Rules (47 CFR§2.1093).
2.2
Exposure Categories
The limits for exposure are determined by the type of situation in which the individual is exposed. Table
1 lists the limits for the particular environment.
WLL Report #15148-02 Rev 0
- Page 1 of 4 -
© 2018 Washington Laboratories, Ltd.
RF Exposure Test Report
Blackboard, Inc.
PR5000
2.2.1
February 2018
Occupational/Controlled Exposure
In general, occupational/controlled exposure limits are applicable to situations in which persons are
exposed as a consequence of their employment, who have been made fully aware of the potential for
exposure and can exercise control over their exposure. This exposure category is also applicable when
the exposure is of a transient nature due to incidental passage through a location where the exposure
levels may be higher than the general population/uncontrolled limits, but the exposed person is fully
aware of the potential for exposure and can exercise control over his or her exposure by leaving the area
or by some other appropriate means. Awareness of the potential for RF exposure in a workplace or
similar environment can be provided through specific training as part of a RF safety program. If
appropriate, warning signs and labels can also be used to establish such awareness by providing
prominent information on the risk of potential exposure and instructions on methods to minimize such
exposure risks.
2.2.2
General Population/Uncontrolled Exposure
The general population / uncontrolled exposure limits are applicable to situations in which the general
public may be exposed or in which persons who are exposed as a consequence of their employment may
not be made fully aware of the potential for exposure or cannot exercise control over their exposure.
Members of the general public would come under this category when exposure is not employmentrelated; for example, in the case of a wireless transmitter that exposes persons in its vicinity. Warning
labels placed on low-power consumer devices such as cellular telephones are not considered sufficient to
allow the device to be considered under the occupational/controlled category and the general
population/uncontrolled exposure limits apply to these devices.
Table 1: MPE Limits
Frequency range
(MHz)
Electric field strength
(V/m)
Magnetic field strength
(A/m)
Power density (mW/cm2)
Averaging
time
(minutes)
(A) Limits for Occupational/Controlled Exposures
0.3–3.0
614
1.63
*(100)
3.0–30
1842/f
4.89/f
*(900/f2)
30–300
61.4
0.163
300–1500
N/A
N/A
f/300
1500–100,000
N/A
N/A
(B) Limits for General Population/Uncontrolled Exposure
0.3–1.34
614
1.63
*(100)
30
1.34–30
824/f
2.19/f
*(180/f2)
30
30–300
27.5
0.073
0.2
30
300–1500
N/A
N/A
f/1500
30
1500–100,000
N/A
N/A
30
WLL Report #15148-02 Rev 0
- Page 2 of 4 -
© 2018 Washington Laboratories, Ltd.
RF Exposure Test Report
Blackboard, Inc.
PR5000
February 2018
Device Summary
Table 1 below summarizes the criteria used to evaluate the PR5000.
Table 2: Device Summary of the PR5000
Model Evaluated:
Transmitter Category:
Exposure Category:
Antenna Gain:
PR5000, Tx1
Mobile
general population / uncontrolled
exposure
1.4 dB
PR5000, Tx2
Mobile
general population / uncontrolled
exposure
2 dB
Power Output (dBm):
22.4 dBm
-1.1 dBm
Evaluation Distance:
20 cm
20 cm
2402 – 2483 MHz
2402 – 2483 MHz
1 mW/cm2
Frequency Range:
Limit:
1 mW/cm2
Radio Frequency Radiation Exposure Evaluation
The highest RF output power of the unit was measured and recorded. According to §1.1310 of the FCC
rules, the power density limit for General Population/Uncontrolled Exposure is 1mW/cm2.
The MPE shall be calculated at 20cm to show compliance with the power density limit. The following
formula was used to calculate the Power Density:
S=
PG
4πR 2
Where:
S = Power Density
P = Output Power at the Antenna Terminals
G = Gain of Transmit Antenna (linear gain-isotropic)
R = Distance from Transmitting Antenna
WLL Report #15148-02 Rev 0
- Page 3 of 4 -
© 2018 Washington Laboratories, Ltd.
RF Exposure Test Report
Blackboard, Inc.
PR5000
February 2018
Table 3: Transmitter MPE Calculation Summary
One Transmitter
Frequency
Limit
Distance (cm), R =
Power (dBm), P =
TX Ant Gain (dBi), G
2402
1.000
20
22.4
1.4
Power Density:
Minimum Distance:
0.0477
4.4
Second Transmitter
Frequency
Limit
Distance (cm), R =
Power (dBm), P =
TX Ant Gain (dB), G =
Power Density:
Minimum Distance:
2402
1.000
20
-1.1
0.0002
0.3
Multiple Transmitter Summary
Power Density:
0.0480
Minimum Distance:
4.7
WLL Report #15148-02 Rev 0
MHz
mW/cm^2
cm
dBm
dB
mW/cm^2 Separation<20 cm
cm
MHz
mW/cm^2
cm
dBm
dB
mW/cm^2 Separation<20 cm
cm
mW/cm^2 Separation<20 cm
cm Sum of the Distances
- Page 4 of 4 -
© 2018 Washington Laboratories, Ltd.
Download: PR5000X011 Point of Sale Reader RF Exposure Info MPE Report Template Blackboard Inc.
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Document ID3747126
Application IDS24Md8c1YIe+xnZzsOb6Eg==
Document DescriptionMPE
Short Term ConfidentialNo
Permanent ConfidentialNo
SupercedeNo
Document TypeRF Exposure Info
Display FormatAdobe Acrobat PDF - pdf
Filesize23.49kB (293668 bits)
Date Submitted2018-02-08 00:00:00
Date Available2018-02-09 00:00:00
Creation Date2018-02-07 15:30:23
Producing SoftwareAdobe PDF Library 10.0
Document Lastmod2018-02-07 15:30:25
Document TitleMPE Report Template
Document CreatorAcrobat PDFMaker 10.1 for Word
Document Author: Steve Koster

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