20 Most Recent Sperry Instruments HET202 2 Range Voltage Tester Questions & Answers

If you are testing A.C. volts in most cases polararity really doesn't matter much. For voltage test put one probe on white wire and the other on black. If you are testing D.C. voltage then you need to observe polararity and go black to ground - and red to positive +. Hope this helps you. Thanks

This simple, inexpensive tester is described by the manufacturer as a 2 range voltage tester. It appears to have two ranges of voltage that it can test for the presence 110-120 or 220-240 volts in a circuit. There is nothing to interpret, the device will indicate one or the other and whether AC or DC.

This could be useful for testing electrical circuits in homes in the US & Canada (and other places that use 120/240 utility system voltages). It will not help with finding split circuits, and will not be able to accurately display the actual voltage on a circuit. If there is a problem of a back fed circuit, passing 60 or so volts, the unit may indicate either no voltage, 110 volts or some other indication of voltage; but can not indicate how much voltage is present.

This device function more like a test light than anything else, and an inexpensive meter for $20 would provide much more information and have greater capabilities. Electricians do not use test lights or devices like this because not enough information is provided. I know you're not an electrician - but this tool is probably only good enough to let you know that some voltage above x number of volts and below 130 or more than 130 but less than 250 is present - that's about it.

I couldn't recommend the use of test light or testers like this to anyone. Just my two cents. Good luck!

This is a Voltage tester, not a circuit tester

http://www.sperryinstruments.com/documents/products/dsa500a.pdf

The "neutral" wire in home wiring is always the "white" wire. The hot line is always the "black" wire or in the case of a multiple conductor, can be just about any color but white or green. Green is circuit ground, the nasty 3rd pin on the plugs we use, but a very important safety feature.
When you have an "open neutral" reading it means that the "white" wire has come loose some place in your wiring. A broken or loose wire is referred to as an "open" in electrical terms. I assume you are plugging an outlet tester in and get this indication. It may just be in the outlet you are testing or someplace else between the outlet and the circuit breaker.

I had one do this and I had to install a new one due to the other one being faulty internally

Same exact features, buttons and functions as this manual by Irwin.

http://www.irwin.com/uploads/documents/36_laser_tape_25.pdf

I want to use an old sensor forgiven during 30 years. I have no more manual, off course. Thanks for your answer

Most moisture meters measure the moisture content of wood or concrete is measured in percentages. So if the reading says 15 that means that there is a content of 15% moisture in the concrete.

Pressing the - (minus) button on the back toggles temperature units. Pressing + (plus) toggles barometric pressure units.