So, yes I had to have the scope - no problems. I bought the one with pre soldered chips. Then the Component Tester but this time I bought the assembled board, like John S.
"I am a Bear of Very Little Brain, and long words Bother Me," Quoting A. A. Milne.
How do I use it, everyone else seems to know. All the experts show components plugged into the ZIF socket - how do they find out where?
Eventually, like Poo Bear the light dawned. This board has the Mega328 computer chip (Same as Arduino) and has RAM, ROM etc built in. The software configures it as a three terminal tester. Components can be connected to any two of them - resistors, capacitors, diode and inductors. Transistors and other three terminal devices can be tested - magic!
The attachments show the ZIF socket. The figures are not a serial number
but refer to the holes in the ZIF. Two parallel rows, any combination of the holes can be used 1&2, 1&3, or 2&3 or 123 for transistors. There are three pads on the board and three flying leads.
Very happy bear.
I hope that this might help other bears out there.