At the transmitter site--the GROUNDING STICK is your freind along with the HV and plate voltmeters on the transmitters.If you see a reading on one of those with power off- STOP!!!!!!The supply is still charged--waiting to get you.Look away while grounding it out-the flash.One man has been killed here-and almost another so we have to be CAREFUL here.Yes-there are thousands of volts here with amps to back them.Yes if you have to measure with a prtable meter-connect it-DON'T HOLD it then take a reading-power off ground,then disconnect the meter.also a portable meter can EXPLODE if too high a voltage is applied to it or if its set to ohms or amp by mistake.Also DON'T use those meter neck straps!!!!!A STUPID device.do you want to "wear" your meter when its connected to a possibly LETHAL voltage?I wouldn't trust my life to a meter case.