Specifications

B-field Exposure From Induction Cooking Appliances 44
a factor of 4 when using a lid, allowing longer measurement times, while maintaining constant
measuring conditions. A lid was used for all of the DASY4 robot measurements.
Handle position In the case of frying-pan and saucepans, the handle position has a noticeable
influence on the B-field exposure. However, no general rule could be established, and the
variation of the B-field depends strongly on the pot, hob and appliance combination. For that
reason, the most appropriate handle position was chosen: For single-hob measurement, the
handle was aligned on the right side (y-direction), and for multi-hob measurement, the handle
was aligned on the right for hobs 1 and 3, and on the left sides for hobs 2 and 4 (y-direction).
Proximity to a magnet and paramagnetic object (cooking utensil) The manufacturer
recommends not to place cooking utensils, aluminum foil or magnets on the hob when it is
switched on (risk of burning). Measurements of the B-field variation were performed, and it
appears that depending on the object (e.g., magnet and paramagnetic utensil) and depending on
the location (between the appliance and the probe, on the side of the hob), the B-field variation
is −5 % < ∆B/B
average
< 1.5 %.
6.1 Induction Cookers B-Field Assessment
The second objective of this study was to evaluate the worst-case exposure for realistic use of
the three selected induction cooking devices, and to assess whether compliance is maintained
with the ICNIRP guideline (6.25 µT for general public exposure).
6.1.1 Definition of Several Scenarios Corresponding to Standard and Worst-Case
Exposures
In Chapter 6, the influence of several parameters was evaluated to assess the worst-case exposure.
The predominant parameters (see Chapter 6.0.6) were used to define the exposure scenarios,
combining single- and multi-hob use, pans centered and not, and the standard or worst-case set
of pans (see 3.3).
Standard exposure scenarios The standard set of pots (see Chapter 3.3.1) was used in the
scenarios summarized in Table 12. 14 standard scenarios were selected, combining single- and
multi-hob use, and pan centered and not. For Appliance 3, the single-hob standard measure-
ments were performed using pots 3 and 13 (largest and smallest pots of the standard set of pots,
see explanation in Chapter 5.0.1).
Figure 34 shows the pot locations for non-centered measurements. In order to measure the
worst-case exposure on each side for multi-hob measurements with appliance 1, the heat settings
(P, P ) were selected for hob pairs (1, 2), (3, 4), (1, 3) and (2, 4) for front, rear, left and right side
measurements, respectively. Similarly, for non-centered pots on appliance 3, the pot location
was chosen to differ for the front, rear, left and right side measurements (see Figures 34 c) and
34 f) ). Appliance 3 is portable. The cook can choose to place it according to his needs and
available space, and thus it may be accessed from the rear, left and right sides. For this reason,
the B-field exposure of appliance 3 was assessed from all sides.
Worst-case exposure scenarios The worst-case set of pots (see 3.3.2) was used in the
scenarios given in Table 13. A total of 12 scenarios were selected, combining single- and multi-