[SIZE=10.5pt]Not related to solar as I can’t be bothered to get involved![/SIZE]
[SIZE=10.5pt]For me, I may well go for the DL6506, I have been toying with a mA dc clamp meter for a while, could have made use of it on quite a few jobs over the last few years, I had never looked into it before now.[/SIZE]
[SIZE=10.5pt]I have an ac/dc clamp meter for larger currents, the Fluke 337, which I think is now obsolete & replaced by something else?[/SIZE]
[SIZE=10.5pt]The only thing that concerns me with the cheaper instruments is the accuracy, take the DL6506, resolution 1mA, accuracy +/-3% not too bad, at a current of 2mA that comes out in @ +/- 60 micro amps, so a difference of one digit perhaps, (but doubtful), so a true 2 mA would probably read 2mA, so OK.[/SIZE]
[SIZE=10.5pt]The killer for my mind is the +/- 8 digits on top of this again, so your true current of 2mA could be displayed as anything between -6 (indicating a reversal of current flow) & 10 mA, now that's an order of magnitude![/SIZE]
[SIZE=10.5pt]Now to step up to a meter such as the Amprobe LH41A, this is +/-1.3% +5 digits, the % error will again give a negligible change to the reading, but this time the error is only in the +ve direction so, your true 2mA could read between 2 & 7mA.[/SIZE]
[SIZE=10.5pt]However to get this increase in accuracy you are going from(based on isswww.co.uk pricing) £67.95 up to £199.95![/SIZE]
[SIZE=10.5pt]Nearly triple the price.[/SIZE]
[SIZE=10.5pt]Now the DL6507, has a much better accuracy than the 6506, but only ac, I have this meter, which is fine for earth leakage current on installation circuits.[/SIZE]
[SIZE=10.5pt]It’s just that the dc circuits, might need a greater accuracy, but I'm not talking about 4-20mA signal stuff though.[/SIZE]
[SIZE=10.5pt]I've attached the spec sheets so you can see what I am on about for these three and also the two that you were looking at.[/SIZE]