I have a BK 2704B multimeter that I fried by mistakenly putting high voltage on the Mv setting. The meter has only one fuse and a thermistor, PCT "Positive Temperature Coefficient" in series with the red probe and the meter. This thermistor is the switching type, it's like a small cap (not a cap but a temperature sensing resistor) as seen in the picture. This PCT thermistor acts like a fuse, it reacts to temperature changes (high heat from voltage over-load). As the voltage increases the PCT senses the higher temperature and lowers the current flowing threw it, acting like a self setting fuse to protect the meter. The fuse blew too, replacing fuse the meter still doesn't work, but the continuity does with a battery installed, the only setting that works.
I'd like to replace this PCT but can't identify the value I would need, the marking are "222 with a H under the number, back side has nothing. The BK meter has a 1000vdc reading capability, 750 vac. a 9 volt battery operates the meter. I am assuming I need a PCT that can handle 1000vdc, as far as the temperature (heat from an voltage over-load) rating, I have no idea. Hopefully, someone with experience in thermistors can help me find the correct replacement. The coating on the PCT is a polymer like coating, I believe it's the switching type and the PTC thermistor was covered in a rubber boot like a roach.