GW Instek GDM-531/532/533/541 Handheld Digital Multimeters
Digital MultimetersHandheld digital multimeters from 6,000 to 22,000 counts with True RMS, temperature measurement, and USB interface for field service and production testing. Buy in India from GSAS.
Models
GDM-531/532/533/541
Resolution
6,000 to 22,000 counts
Ranging
Auto/manual (model dependent)
Current
Up to 20A (GDM-541/533)
Features
True RMS, temperature, continuity
Interface
USB (GDM-533)
Overview
About GDM-531/532/533/541 Handheld Digital Multimeters
The GDM-530 series handheld digital multimeters cover field service, production line, and educational applications with models ranging from 6,000 counts (GDM-531) to 22,000 counts (GDM-541).
GDM-541 and GDM-533 offer auto/manual ranging with current measurement up to 20A, suitable for power supply testing, motor diagnostics, and industrial maintenance. GDM-532 and GDM-531 provide manual ranging at lower price points for education and basic measurement tasks.
True RMS measurement (GDM-541/532) handles distorted AC waveforms accurately. Temperature measurement (GDM-533/532) via thermocouple supports HVAC commissioning and process verification. Audible/visual overload alarm protects the operator. USB interface on the GDM-533 enables data logging and remote monitoring.
Blog
GW Instek Insights
Emulating Processor Power for Thermal Testing: Why Constant Power
A heat sink or a cold plate is qualified against a watt figure, not a volt figure. This application note explains why a thermal load is driven in constant-power mode, how the bench is built for air and for liquid cooling, and what to confirm before you buy.
CRPS and Rack Power Supply Testing: The Six Tests That Matter
A CRPS module has to hold up under an unbalanced grid, a 0 to 100 percent load step, a surge on the line and a redundancy handover. This application note sets out the six tests, and the one source capability that makes a long feeder reproducible on the bench.
GPU Power Board Testing: DC Input Verification Before Integration
A GPU power delivery board is cheap to reject on a bench and expensive to find in an assembled server. This application note covers the programmable DC input test that screens the board, and the same test applied to incoming server systems.
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