|IEC 61010-1||CAT IV (600V)|
|Measurements||voltage, current, resistance, capacitance, diode, continuity, frequency|
|Features||autorange, data hold, backlight, relative|
The MASTECH MS8250B is a 4000 counts, CAT IV (600V) handheld digital multimeter with USB connectivity.
- Main chip: Fortune Semiconductor FS9721-LP3 (guessed from protocol)
The protocol is the same as the one used in the Fortune Semiconductor FS9721 chip (likely because that chip is used in the DMM).
See Multimeter_ICs#Fortune_Semiconductor_FS9721_LP3 for the DMM IC protocol.