GDM-8351 - Multimeter GW Instek - Free user manual and instructions
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| Brand | GW Instek |
| Model | GDM-8351 |
| Product Type | Bench Digital Multimeter |
| Display | VFD (Vacuum Fluorescent Display), dual display |
| Digits | 5.5 digits (120,000 counts) |
| DC Voltage Accuracy | 0.012% + 5 counts |
| AC Voltage Bandwidth | 20 Hz to 100 kHz |
| True RMS | AC, AC+DC |
| Measurement Functions | DCV, ACV, DCI, ACI, Resistance, Capacitance, Frequency, Period, Diode, Continuity, Temperature (RTD/TC) |
| Interface | USB (Virtual COM), RS-232C, optional GPIB |
| Data Logging | Internal memory, PC software |
| Math Functions | Rel, Max/Min, dB, dBm, Compare, Percent |
| Power Supply | AC 100-240 V, 50/60 Hz, 25 VA |
| Dimensions (W x H x D) | 265 x 107 x 302 mm (10.4 x 4.2 x 11.9 in) |
| Weight | Approximately 2.5 kg (5.5 lb) |
| Safety Rating | CAT I 1000 V, CAT II 300 V |
| Fuse Protection | Replaceable fuse (11 A/1000 V, 0.44 A/1000 V) |
| Warranty | 1 year (standard) |
| Accessories Included | Test leads, power cord, user manual (CD), calibration certificate |
| Optional Accessories | GPIB card, temperature probe, carrying case, rack mount kit |
Frequently Asked Questions - GDM-8351 GW Instek
How do I perform a basic DC voltage measurement?
Turn the rotary switch to DCV. Connect the test leads to the input terminals (V/Ω and COM). The default range is auto-ranging. Press RANGE to manually select a range if needed.
Can I measure AC current with this multimeter?
Yes. Turn the rotary switch to ACI (AC current). Select the appropriate current terminal (A or mA/μA) based on expected current. Always connect the meter in series with the circuit.
How to measure resistance?
Turn the rotary switch to Ω. Connect the test leads across the resistor. Ensure the circuit is powered off. The meter auto-ranges; use RANGE for manual ranging.
What does the 'REL' button do?
The REL (relative) button sets the current reading as a reference zero. Subsequent readings are displayed as the difference from that reference. Useful for offset compensation or measuring small changes.
How to connect the multimeter to a PC for data logging?
Use the built-in USB port (Virtual COM) or optional RS-232C. Install the supplied driver and software. Set the baud rate in the meter's utility menu (default 115200). The software allows real-time data display and logging.
How do I replace the fuse?
Disconnect all test leads and power off the meter. Open the rear battery/fuse compartment. The two fuses are: one 11 A/1000 V (for A terminal) and one 0.44 A/1000 V (for mA/μA terminal). Replace with same type and rating. Close the compartment.
What is the maximum voltage the GDM-8351 can measure?
DC voltage: up to 1000 V. AC voltage: up to 750 Vrms. For safety, do not exceed these limits. The input impedance is 10 MΩ for DCV.
How do I perform a diode test?
Turn the rotary switch to the diode setting (usually marked with a diode symbol). Connect the red lead to the anode and black to the cathode. The display shows the forward voltage drop. An open circuit indicates a faulty diode.
Can I measure temperature?
Yes, with an optional temperature probe. Turn the rotary switch to TEMP. Select the probe type (RTD or thermocouple) in the setup menu. Connect the probe to the input terminals (use adapter if needed).
How to reset the meter to factory defaults?
Press and hold the SHIFT key while powering on the meter. The display will show 'FACTORY RESET'. Release the key and confirm by pressing ENTER. This clears all user settings.
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USER MANUAL GDM-8351 GW Instek
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Product information
Brand : GW Instek
Model : GDM-8351
Category : Multimeter