GW Instek GDM-397

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GW Instek GDM-397
Gdm-397 front.png
Status supported
Source code serial-dmm
Counts 4000
IEC 61010-1 CAT III (1000V) / CAT IV (600V)
Connectivity RS232
Measurements voltage, current, resistance, capacitance, frequency, temperature, duty cycle, diode, continuity
Features autorange, data hold, relative, backlight

The GW Instek GDM-397 is a 4000 count CAT III (1000V) / CAT IV (600V) handheld digital multimeter with RS232 connectivity.

It is similar to the UNI-T UT61B, but not the same device/PCB (this appears to have improvet input protection along with HRC fuses).

Press and hold the REL button to enable serial data transmission.



RS232 cable:

USB cable:



See Multimeter_ICs#Fortune_Semiconductor_FS9922-DMM3 for the DMM IC protocol. Depending on the cable, additional transport-specific decoding is needed, though.

Serial data transmission must be enabled by a long press on the "REL" button.