21-02-2015, 09:06 AM
Hello David and other readers. I now have a copy of user manual for the SNAP 9, its the same as Sperry snap 9, I think both were made in Japan, badge engineering. The battery for the ohms range is contained within one of the probes, I'll have to make one. I've found the meter to be quite useful when test a motor. I made a simple but very short extension lead 13 amp plug one end, metal clad socket outlet the other. To use one of these clamp type meters, the clamp should be around just one the active conductors live or neutral, not both. What I've done is to bring out the neutral, which should be at, or very near earth potential via a choc block connector forming an accessible loop. For the loop I've used a piece of single insulated and sheath cable. So, when I want to test a load such as a motor, I plug in the extension to the mains, then the motor to the metal box and clamp the meter around the neutral loop. Much quicker than inserting an ammeter in series. Not a thing you would use every day but handy when you do. Ted
