PIM uses this meter to take baseline EMF readings and to track down sources of EMF. The power of this meter is that 60 Hz frequencies (and the harmonics) can be ignored and only the field strength of other frequencies can be evaluated. This is important because there are many 60 Hz frequencies that will be present in most buildings and this meter allows PIM to quickly focus on areas that have high levels of EMF that are outside of the 60 Hz range. Unlike move EMF meters, this meter also is unweighted, meaning that the meter displays the true EMF field strength instead of just what the human body is experiencing. Not many EMF meters on the market have this feature.
The DSP-523 uses a powerful digital signal processor that sets a new standard for AC gaussmeters. Now you can ignore powerlines, bandpass powerlines and analyze powerline harmonics, all with one simple meter.
The first line shows you the total, unfiltered field strength. The second line shows the field strength with one of four digital filters selected:
- Ignore 60Hz + Harmonics
- Ignore 60Hz Only
- Bandpass 60Hz + Harmonics
- Bandpass 60Hz Only
Selectable axis, graphing, max hold, and a variable backlight are other features of this meter. No other gaussmeter has the ability to accurately notch or bandpass powerline fields and harmonics while still passing other frequencies. Easy to use, and innovative.
50 Hz European Fields
Need to use the meter in Europe where power line are 50Hz instead of 60Hz? No problem, you can switch between 50Hz and 60Hz filtering in the menu.
Completely Ignore Powerlines
Let’s say you want to measure the fields generated by a combustion or DC motor such as the fields inside your car. These fields aren’t at powerline frequencies, but in the electrically dense environment we live in today, a regular gaussmeter’s readings will be distorted by surrounding powerline fields. How would you measure the 80Hz refresh rate from an LCD monitor? What about paranormal research, where you’re looking for EMF anomalies but want to be sure you’re not measuring man-made fields? What if you could ignore 60Hz and harmonics of 60Hz, to only measure fields NOT related to powerlines? Now you can.
60Hz+Harmonics Notched Frequency Response
The picture above shows the meter measuring the fields from a transformer, which are at powerline frequencies. The meter shows a total field strength of 186.8 mG, but the meter ignores it for the second reading, showing just 0.7 mG from other sources:
Ignoring 60Hz Only
What if you want to measure the field strength of the power line harmonics, or accurately measure a field that is close to a harmonic of 60Hz (190Hz for example)? The DSP-523 allows you to do this as well, by only ignoring 60Hz, but measuring everything else.
60Hz Only Notched Frequency Response
Bandpass Powerlines
Take measurements with a narrow bandpass filter centered at 60Hz, allowing you to accurately measure powerlines without distortion from harmonics. Or, bandpass on 60Hz + Harmonics, which tells you the total field strength due to powerlines, including all harmonics (Setting: 60Hz+Harmonics Bandpass Frequency Response).
Measuring Power Line Magnetic Fields without Harmonics
Sometimes you want to see how “clean” the 60Hz sine wave from an AC powered device is. When a sine wave is pure or “clean”, it will only contain the fundamental frequency (60Hz Only), but when a sine wave is “dirty” from power glitches or other faults, it will contain harmonics of the fundamental frequency (120Hz, 180Hz, etc). Take measurements with a very narrow bandpass filter at 60Hz, and compare that to the overall unfiltered field strength. For a clean sine wave, these measurements will be almost the same (Setting: 60Hz Only Bandpass Frequency Response).
Specs:
- Accuracy: ±(4% + 4 digits) from 48 to 62 Hertz
- Flat frequency response:
- ±½dB 30 to 300 Hz
- -3dB 15 to 330 Hz
- Range 0-250 mG (auto-ranging)
- Highest resolution: 0.01 mG
- True RMS Measurements
- Three Axis Detector, selectable (3-Axis, X, Y, Z)
- Two display styles:
- On-Screen Graphing of total RMS, Notched and Bandpassed field strength
- Dual readout: Compare total RMS strength plus select:
IGNORE 60Hz Only or 60Hz+Harmonics
BANDPASS 60Hz Only or 60Hz+Harmonics
- Blue LED Backlight, variable brightness
- Max Hold on ALL features
- Update Rate: 1.6 times per second
- Selectable units: milliGauss or microTesla
- Runs on one 9V Alkaline battery
The full instruction manual is available here.
