BM-SCAN -
Magnetic field strenght meter
Page 14
English
Notes and requirements of Standard 60118-4
The standard notes that in frequencies from 100Hz to 5000Hz the loop should also reproduce all
signals. At a minimum, systems should be tested at 100Hz, 1KHz and 5KHz.
Record RMS level readings for each frequency.
As in method I, if the level does not vary by more than ± 3dB, the installed system meets the
IEC specifications of the standard. This method was requested by the technicians so that they
could perform the test with an instrument without continuously adjusting the frequency source.
It also facilitates testing in several locations.
In the menu, the following items can be set: backlight level, headphone output type, headphone
volume, display units (dB, mG, uT) and switch-off delay (5 to 30min or none).
The 2-purpose headphone output jack: First, it can be used to monitor the loop program and
gives you a weighted output signal that can be heard with standard headphones. To change
the headphone volume, drag the Use / Menu button to Menu and use the Mode button to
switch to the headphone volume. By pressing the "select" button, you will be directed to the
volume control screen where the upper button increases the volume and the lower button
decreases the volume. Once set, simply return to operation to save the setting.
A complete spectrum output can be sent from this same connector which could then feed a
spectrum analyzer.
This would show the signal level at different frequencies and help confirm proper operation
and evaluate the frequency and level of any interference.
To switch from Weighted to Flat: With the display on, switch to Use / Menu in "Menu", press
the "A" mode button once to go to the Headphone Jack setup screen, then, by pressing the
"B" selection button, you can choose a weighted or flat spectrum.
7 - Headphone output
8 - Menu settings
BP-RMS :
-22.5 dB
MAX :
1000 Hz
