After me getting informed about ZigBee radios technology highlights, I did get motivated to test the range of my own CNX industrial kit.
I am aware that all modules and DMM them have their transmitter & antenna at the back.
Therefore if you expect maximum working range at max distance, its one wireless module it must be positioned in the way that the back side of the module this is turned at the direction of CNX 3000 multimeter.
Or alternatively if such wireless modules them are installed in a close cabinet, them should be placed in the way that LCD display this facing the interior of the cabinet.
My testing of V3000 (voltage module) at open space line-of-sight, this worked up to 50 meters distance (164 ft).
In conclusion,ZigBee radios and correct wireless modules placement, this it does help CNX tools so them to deliver much more range compared to regular Bluetooth.
As gift to my readers , I am offering one label which I just made for my own CNX 3000 DMM, this is about helping you at remembering how to activate most needed functions.