weird reading on the multimeter.

today i found how to use the transsitor reader on my multimeter and i connected one npn transitor it showed 240 but when i changed it to pnp the multi meter showed a symbol of a battery on the top left corner and the readings was 1500+ i have no idea why that happend any ideas?

The meter's operating instructions will say what is happening.
Low battery?

no manual i found the meter in my storage room
and i think it shows low batt but i had a full batt connected i think putting a npn transsitor and setting to pnp makes the multimeter go crazy i should not do it again

lol I was going to say, that is probably a bad thing to do...

If you plug a PNP into the PNP slot and it works fine, than it is simply a readout error (wroing transistor).