Analytical Electronics Services Pvt Ltd

GDM-8261A Datasheet

GW Instek GDM-8261A Features

• 6 1/2 Digit Display：1,200,000 counts
• DCV Basic Accuracy：0.0035%
• Dual Measurements to perform two selected measurements simultaneously
• Bright Vacuum Fluorescent Display (VFD)
• Provide AC+DC Voltage or Current Measurement Functions
• 11 Measurement Functions & 10 Math Functions
• High Resolution: Up to 100pA with DCI and 1nA with ACI Measurements
• Temperature Measurement (RTD & Thermocouple) from -200°C ~ +1820°C
• Interface : RS-232, USB, GPIB

GDM-8261A Description

The GW Instek GDM-8261A is a high precision 6 ½ digit Digital Multimeter with dual measurement displays, 11 measurement functions and 10 math functions at high accuracy (35ppm DC voltage accuracy) to accommodate the most frequently performed parameter measurements in various application fields today. The GDM-8261A adopts a scanner card, which carries 16 V-Channels and 2 I-Channels, to facilitate the measurements of multiple-test points on either a device or multiple devices all at a press of a button. With this multi-point measurement capability, the GDM-8261A can be used as a semi-auto ATE System to increase the throughput of manufacturing test or as a data logger to perform long term monitoring or characterization of a DUT. A PC Software, DMM-Viewer, is available with GDM-8261A to support multi-channel panel setting and data logging of the scanner card. Besides, a LabVIEW driver is also supported to help user create his/her own virtual instrument on the PC screen for easy programming. For ATE system measurements or remote control applications, both USB and RS-232 Interfaces are provided as standard, and either GPIB or LAN can be selected as optional interface for the GDM-8261A.

Ideal for Bench Assignments

The GDM-8261A includes all the basic measurement functions that are required for engineers to handle design, development and testing jobs for electronic circuits or products. The basic measurement functions include voltage, current, resistance, diode, continuity, frequency and temperature. Remarkably, the current measurement function covers a very wide range from 100uA to 10A for DC current (in 6 ranges) and from 1mA to 10A for AC current (in 5 ranges). In addition, the GDM-8261 features 10 Math functions (dBm, dB, compare and other mathematical operations) to accommodate specific measurement requirements and complex measurement applications.

Dual Measurements with Dual Displays

Unlike most of the “dual display” digital multimeters, which show test result on the primary display and range information on the secondary display, the GDM-8261A is able to perform two measurement functions simultaneously and shows the test results on primary display and secondary display respectively. The GDM-8261A supports an almost unlimited number of measurement combinations of dual measurement functions, besides the normal test result and range information displays, greatly increases the test speed of multi-function measurement tasks.

High Measurement Resolution & High Sampling Rate

The GDM-8261A offers an exceptionally high resolution of 0.1μV for voltage measurement, 100pA for DC current measurement, 1nA for AC current measurement, and 100μΩ for Resistance measurement. This level of resolution and accuracy becomes a must for the precision measurements in specific applications. In addition, the GDM-8261A is capable of acquiring 30 measurement readings/s at the display resolution of 6 ½ digits and 2,400 readings/s at the display resolution of 4 ½ digits. The fast acquisition rate of the GDM-8261A adequately meets today’s measurement demands.

2/4 Wire Resistance Measurement

The GDM-8261A offers two methods, both 2-wire and 4-wire, for resistance measurements. The 2-wire measurement is most commonly used for resistance measurement in the range from 100Ω to 10kΩ. Whereas the 4-wire connection is normally applied for resistance measurement at a value lower than 100Ω. When applied, 4-wire measurement automatically compensates the test lead resistance and connector contact resistance to get an accurate measurement result.

Temperature Measurement

The GDM-8261A performs temperature measurement accommodating a wide range of temperature sensors of either thermocouples or RTD (Resistive Temperature Detectors). For thermocouples, the GDM-8261A uses voltage measurement terminals as the thermocouple input and calculates the temperature from the voltage fluctuation. Most of the popular thermocouple types are supported for temperature measurement on the GDM-8261A. For RTD sensors, the GDM-8261A calculates the voltage fluctuation arisen from the resistance variation due to temperature change. Either front panel terminals or scanner card terminals can be used as the input for temperature sensor.

GDM-8261A Accessories

• Quick start guide x1, Power cord x1
• Test lead GTL-117 x1, USB Cable GTL-247
• CD x1 (including complete user manual, upgrade program and PC software DMM Viewer)
• Calibration key GDM-01 x1 (for Firmware upgrade)

GDM-8261A Optional Accessories

• Opt.01 GDM-SC1 Scanner Card (V x 16ch, I x 2ch)
• Opt.02 GPIB Card or Opt.03 LAN Card
• GTL-108A 4W Type test lead
• GTL-232 RS-232C Cable, 9-pin Female to 9-pin, null Modem for Computer, Approx. 2m
• GTL-248 GPIB Cable, Approx. 2m
• GTL-251 GPIB-USB-HS (High Speed)