Shortly before I retired, one of my colleagues who was an EMC specialist, told 
me that they no longer tested for frequencies below 150 kHz. He also found out 
the hard way not to bring his magnetic-striped credit cards into a high E-field.

John F5VLF

> On 11 Aug 2016, at 11:19, Andy Talbot <[email protected]> wrote:
> 
> I've just been trying to use my new Smart Meter to measure the mains power 
> consumption of on of my 137kHz transmitters,  the QRP 180 Watt linear Tx.  
> 
> I took the display unit out to the shed where the Tx resides and fired up the 
> RF.  As soon as I touched the touchscreen controls, instant lockup of the 
> display unit.   Fortunately it had a master reset button.
> 
> It certainly  wasn't happy with high E-field, as , I'm sure any touchscreen 
> won't be
> 
> Andy  G4JNT

[email protected]

Researching history of RABSON, BLACKSHAW, GAUNTLETT, VERLANDER and ROBSONNE