UNI-T UT61B
 | |
| Status | supported |
|---|---|
| Source code | uni-t-dmm |
| Counts | 4000 |
| IEC 61010-1 | CAT II (600V) / CAT III (300V) |
| Connectivity | RS232 / USB |
| Measurements | voltage, current, resistance, capacitance, frequency, duty cycle, diode, continuity, temperature |
| Features | autorange, data hold, min/max, rel, bargraph, backlight |
| Website | uni-trend.com |
The UNI-T UT61B is a 4000 counts, CAT II (600V) / CAT III (300V) handheld digital multimeter with RS232 or USB connectivity.
Hardware
Multimeter:
- Multimeter IC: Fortune Semiconductor FS9922-DMM3 (datasheet)
- Crystal: 4MHz (markings: "3.999")
- Fuses: 0.5A/600V and 10A/600V (HRV fuses)
RS232 cable:
See Device cables#UNI-T_UT-D02.
USB cable:
See Device cables#UNI-T_UT-D04.
Photos
Multimeter:
Device, front
Device, back
Battery
Device open back
Device open front
PCB, front
PCB, back
RS232 cable:
See Device cables#UNI-T_UT-D02.
USB cable:
See Device cables#UNI-T_UT-D04.
Protocol
See Multimeter_ICs#Fortune_Semiconductor_FS9922-DMM3 for the DMM IC protocol. Depending on the cable, additional transport-specific decoding is needed, though.