Specifications

B-field Exposure From Induction Cooking Appliances 47
Multi-hob measurement using the standard set of pots Figure 36 shows the B-field
measured in the vicinity of appliance 1, with hobs 1, 2, 3 and 4 switched on simultaneously
(multi-hob measurement) and using the standard set of pots centered and non-centered. The
B-field does not exceed the ICNIRP limit (6.25 µT) for a measuring distance of 30 cm, according
to EN50366.
Figures 36 a), e) and f) show that the ICNIRP limit is exceeded for measuring distances
of 1 to 5 cm and 5 to 10 cm when the pots are centered and non-centered, respectively. The
corresponding maximum rms-values of the measured B-field are 8.6 µT and 13 µT (measuring
distance of 1 cm).
Figure 37 depicts the B-field measured in the vicinity of appliance 1, with hobs 1 and 2
switched on simultaneously (multi-hob measurement) and using the standard set of pots cen-
tered. The maximum rms-value of the B-field when only two hobs are switched on is 8.5 µT
(measuring distance of 1 cm), which is almost equal to the B-field measured when all four hobs
are switched on.
Single-hob measurement using pot 8, worst-case set of pots Figure 38 shows the B-
field measured in the vicinity of appliance 1, with only hob 1 switched on and using pot 8
(worst-case set of pots) centered and non-centered. The B-field does not exceed the ICNIRP
limit (6.25 µT) for a measuring distance of 30 cm, according to EN50366.
Figures 38 a), b) and e) (pot centered) and 38 f), g), h) and j) (pot non-centered) show that
the ICNIRP limit is exceeded for measuring distances of 9 cm and 15 cm when the pots are
centered and non-centered, respectively. The corresponding maximum rms-values of the B-field
measured are 21 µT and 38 µT (measuring distance of 1 cm).
Multi-hob measurement using the worst-case set of pots Figure 39 illustrates the B-
field measured in the vicinity of appliance 1, with hobs 1, 2 and 3 switched on simultaneously
(multi-hob measurement employing three hobs) and using the worst-case set of pots (pots 8, 13
and 2 on hobs 1, 2 and 3, respectively) centered and non-centered. The B-field does not exceed
the ICNIRP limit (6.25 µT) for a measuring distance of 30 cm, according to EN50366.
Figures 39 a), b) and e) (pot centered) and 39 f), g), h) and j) (pot non-centered) show that
the ICNIRP limit is exceeded for measuring distances of 9 cm and 15 cm when the pots are
centered and non-centered, respectively. The corresponding maximum rms-values of the B-field
measured are 21 µT and 36 µT (measuring distance of 1 cm).
The same results are found in Figure 40, when two hobs instead of three are switched on
simultaneously. The values are the same for one, two or three hobs switched on simultaneously
when using the worst-case set of pots. However, the B-field exposure area is larger with multi-
hob than with single-hob measurement.