User's Manual

Recommended separation distances between portable and mobile RF
communications equipment and the MiniMed 640G insulin pump
The insulin pump is intended for use in an electromagnetic environment in which
radiated RF disturbances are controlled. The customer or user of the MiniMed
insulin pump can help prevent electromagnetic interference by maintaining a
minimum distance between portable and mobile RF communications equipment
(transmitters) and the MiniMed insulin pump as recommended below, according to
the maximum output power of the communications equipment.
Rated maximum output
power of transmitter (W)
Separation distance according to the frequency of
transmitter (m)
80 MHz to 800 MHz
d=1.2 P
800 MHz to 6 GHz
d=2.3 P
0.01 0.12 0.23
0.1 0.38 0.73
11.22.3
10 3.8 7.3
100 12 23
For transmitters rated at a maximum output power not listed above, the recommended
separation distance d in meters (m) can be estimated using the equation applicable to
the frequency of the transmitter, where p is the maximum output power rating of the
transmitter in watts (W) according to the transmitter manufacturer.
Note: At 80 MHz and 800 MHz, the separation distance for the higher frequency range
applies.
Note: These guidelines may not apply in all situations. Electromagnetic propagation is
affected by absorption and reflection from structures, objects and people.
Wireless communication
Quality of service
The CGM transmitter and MiniMed insulin pump are associated as part of an
802.15.4 network for which the pump functions as the coordinator and the CGM
transmitter as an end node. In an adverse RF environment the MMT-1512/1712
pump will assess channel changing needs based on "noise" levels detected during
268 Chapter 15
MP6025958-022 / A
RELEASED