The AC Magnetic Mode uses three ferrite-core coils, pointing in the X, Y, and Z directions, located
near the top of the meter. The X, Y and Z signals are combined into a true magnitude of the
ȴHOGVWUHQJWKLQGHSHQGHQWRIZKLFKGLUHFWLRQWKHPHWHULVSRLQWHG0D[LPXPUDQJHLV
P*ZLWKUHVROXWLRQRIP*DQGDFFXUDF\RIsRIUHDGLQJDW+]DQG+]$IUHTXHQF\
response graph of Standard and Weighted modes is on page 7.
ΖQPRVWKRPHVRURɝFHVVRPHDUHDVDUHȊKRWȋVSRWVZLWKKLJKUHDGLQJV0RVWRIWHQWKLVLV
FDXVHGE\PDJQHWLFȴHOGVZKLFKFRPHODUJHO\IURPXQSDLUHGLQWHUQDOZLULQJ&RQWUDU\WR
popular belief, power transmission lines and transformers do not generally contribute as
PXFKPDJQHWLFȴHOGLQGRRUVDVGRHVLQWHUQDOZLULQJ7KLVLVEHFDXVHKLJKYROWDJHOLQHVFDUU\
relatively low current, and transformers are shielded. Other magnetic sources include video
GLVSOD\VȵXRUHVFHQWOLJKWVOLJKWGLPPHUVWUDQVIRUPHUVWKDWDUHLQVLGHFRQVXPHUGHYLFHV
HOHFWULFEODQNHWVKHDWHUVDQGDQ\WKLQJZLWKDPRWRU0XFKRIWKHWRWDOȴHOGVWUHQJWKLVIURP
IUHTXHQFLHVWKDWDUHKDUPRQLFVRUPXOWLSOHVRI+]+]+]HWF&DUVHVSHFLDOO\QHDU
WKHIURQWȵRRUERDUGDQGPRWRUF\FOHVKDYHIDLUO\VWURQJȴHOGVDWIUHTXHQFLHVKLJKHUWKDQ+]
AC Electric Field Detection
7RPHDVXUHWKHHHFWRIDQ$&HOHFWULFȴHOGRQWKHKXPDQERG\WXUQWKHNQREWRWKH:HLJKWHG
ELEC setting and hold the meter at the location to be measured. For standard technical AC
HOHFWULFȴHOGPHDVXUHPHQWWXUQWKHNQREWRWKH6WDQGDUG(/(&VHWWLQJ
<RXUERG\FDQHDVLO\VKLHOGHOHFWULFȴHOGVWKHUHDGLQJLVORZHULI\RXFRYHUWKHWRSVXUIDFHRIWKH
meter with your hand. Also, the presence of your hand at the back of the meter compresses the
HOHFWULFȴHOGPDNLQJLWUHDGVRPHZKDWKLJKHUWKDQLIWKHPHWHUZHUHVXVSHQGHGIURPDVWULQJ
RUKHOGRQDERDUGDZD\IURP\RXΖQHLWKHUFDVHWKHWUXHHOHFWULFȴHOGQHDUWKHPHWHUZLOOEH
displayed.
The AC Electric Mode uses a metal plate sensor under the top of the meter. Circuitry similar to
WKHPDJQHWLFVHFWLRQFRQYHUWVWKHVLJQDOVLQWRDQHOHFWULFȴHOGVWUHQJWKMaximum range is 1000
9PZLWKUHVROXWLRQRI9PDQGDFFXUDF\RIsRIUHDGLQJDW+]DQG+]$IUHTXHQF\
response graph of Standard and Weighted modes is on page 7.
$IHZDUHDVLQPRVWKRPHVUHDGKLJKRQWKHHOHFWULFȴHOGVHWWLQJ7KHVHLQFOXGHDUHDVQHDU
LPSURSHUO\JURXQGHGHTXLSPHQWWKHIURQWRIYLGHRGLVSOD\VDQGȵXRUHVFHQWOLJKWV
4