RF Exposure

FCC ID: SK9WF111

RF Exposure Info

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FCCID_3857007

Certification Exhibit FCC ID: SK9WF111 FCC Rule Part: 47 CFR Part 2.1091 Project Number: 72135742 Manufacturer: Itron, Inc. Model: WF111 RF Exposure 5015 B.U. Bowman Drive Buford, GA 30518 USA Voice: 770-831-8048 Fax: 770-831-8598

Model: WF111 FCC ID: SK9WF111 General Information: Applicant: Itron, Inc. Device Category: Mobile Environment: General Population/Uncontrolled Exposure The Itron, Inc. WF111 (FCC ID: SK9WF111) is collocated and transmits simultaneously with the Itron, Inc. OW1 (FCC ID: SK9OW1) radio, Itron, Inc. ITR9002 (FCC ID: SK9ITR9002) radio, ITR24 (FCC ID: SK9ITR24) radio, and Sierra Wireless EM7455 (FCC ID: N7NEM7455) radio. Technical Information: Table 1: Technical Information Sierra Wireless Itron OW1 Itron ITR9002 Itron WF111 Itron ITR24 EM7455 FCC ID: FCC ID: FCC ID: FCC ID: FCC ID: SK9OW1 SK9ITR9002 SK9WF111 SK9ITR24 N7NEM7455 Frequency Band(s) 902 - 928 902 - 928 2400 - 2483.5 2400 - 2483.5 699 - 716† (MHz) PCB Quarter PCB Trace PCB Trace RP-SMA Wave PCB Trace Antenna Type(s) Antenna Antenna Monopole Embedded Slot Antenna Antenna Antenna Gain 2.04 1 1.8 3.8 -1.4103 (dBi) Conducted 29.54 26.39 19.15 18.03 24 Power (dBm) Conducted 899.50 435.51 82.22 63.53 251.19 Power (mW) Maximum Peak 1438.80 548.28 124.45 152.41 181.54 EIRP (mW) Maximum Peak 877.00 334.20 75.86 92.90 110.65 ERP (mW) † Worst-case band per MPE Ratio based on the original certification under FCC ID: N7NEM7455 Project Number: 72135742 TÜV SÜD America Inc. Page 2

Model: WF111 FCC ID: SK9WF111 MPE Calculation: The Power Density (mW/cm2) is calculated as follows: PG S= 4πR 2 Where: S = power density (in appropriate units, e.g. mW/cm2) P = power input to the antenna (in appropriate units, e.g., mW) G = power gain of the antenna in the direction of interest relative to an isotropic radiator R = distance to the center of radiation of the antenna (appropriate units, e.g., cm) Table 2: MPE Calculation (Including Collocated Devices) Power Antenna Transmit Radio Radio Antenna Power Density Gain Distance Frequency Power Power Gain Density Radio Limit (mW (cm) (MHz) (dBm) (mW) (dBi) (mW/cm^2) (mW/Cm2) eq.) 902 29.54 0.60 899.50 2.04 1.600 20 0.286 A 902 26.39 0.60 435.51 1 1.259 20 0.109 B 2400 19.15 1.00 82.22 1.8 1.514 20 0.025 C 2400 18.03 1.00 63.53 3.8 2.399 20 0.030 D 699† 24 0.47 251.19 -1.4103 0.723 20 0.036 E † Worst-case band per MPE Ratio based on the original certification under FCC ID: N7NEM7455 Summation of MPE ratios – Simultaneous Transmissions This device contains multiple transmitters which can operate simultaneously; therefore the maximum RF exposure is determined by the summation of MPE ratios. The limit is such that the summation of MPE ratios is ≤ 1.0. Table 3: Summation of MPE Ratios Scenario 1 Radio A (SK9OW1) X Radio B (SK9ITR9002) X Radio C (SK9WF111) X Radio D (SK9ITR24) X Radio E (N7NEM7455) X Radio A MPE Ratio 0.476008673 Radio B MPE Ratio 0.181390637 Radio C MPE Ratio 0.024758832 Radio D MPE Ratio 0.030320066 Radio E MPE Ratio 0.077502235 MPE Ratio Summation: 0.789980443 Project Number: 72135742 TÜV SÜD America Inc. Page 3


Document Created: 2018-05-03 16:17:58
Document Modified: 2018-05-03 16:17:58
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