Products

GW INSTEK GDM-8255A/8251A

Category: Digital Meters

Features:

※ GDM-8255A 199,999 Counts Display
※ GDM-8251A 120,000 Counts Display
※ VFD Two Colors Display
※ 0.012% DCV Accuracy
※ True RMS (AC, AC+DC)
※ 9 Major Measuring Functions and 10 Advanced Measurement Functions
※ 2W/4W Resistance Measurement
※ High Voltage 1000V and 10A Current Range
※ Standard Interface : RS-232C, USB Device, Digital I/O
※ Free PC Software (DMM-VIEWER), LabVIEW Driver
※ Optional: 16+2 Channels Scanner Card (GDM-SC1 for GDM-8255A only)

Description:

Is the resolution of your current mulitmeter inadequate to read the smallest signal? Need an easy to use multimeter with data-logging? Take a look at the GoodWill GDM-825xA series 5 1/2 digit dual-display digital multimeter. It features a DC voltage accuracy of 0.012% with an industry-leading response time. With robust hardware and software the GDM-825xA series will save time on debugging and analysis whilst saving you money. 

 

The GDM-8255A/8251A carries an extensive list of standard measurement items with a dual-display allowing two measurement items to be displayed simultaneously. Advanced measurement functions, such as Max/Min, Hold, Relative value and Compare, are suitable for a multiplicity of applications such as production testing, research and field verification. The USB, RS-232C and 9-pin digital I/O interface are included as standard features for romte control and data capturing for ATE.

 

For convenient PC-based remote control and extensive data capture, the GDM-8255A/8251A includes DMM-Viewer software at no additional cost. DMM-Viewer mimics the operation of the multimeters on the PC, allowing you to quickly use the software with little effort.

 

The optional scanner card (GDM-SC1), creates a self-contained multipoint measurement solution with plug-in design. This approach eliminates the complexities of multipoint measurements and data processing. The scanner lets users effectively measure multiple channels connected to a single GDM-8255A.

 
 

 

GDM-8255A Rear Panel

GDM-8251A Rear Panel

 

 

 

Rich Measurement Functions with Enhanced Features

Advanced
Measurement

Basic Measurement

AC/DCV

AC/DCI

2/4W

Hz/P

°C/°F

dB

dBm

Max/Min

Relative

Hold

Compare

Math

Dual Measurement

Nine major measuring functions such as DCV/ACV, DCI/ACI, 2w/4w Resistance, Diode, Frequency, Continuity test and Temperature are provided on the GDM-8255A/8251A. The 0.012% DC voltage accuracy provides great precision for the DC voltage applications. In addition to the major measuring functions there are several advanced measuring functions such as Max, Min, dB, dBm, REL/REL#, Hold, Compare and Math functions ( MX+B, %, 1/X) to enhance the effectiveness of measuring results.

 

 

Fast Measurement Speed & Transfer rate

Mode

Resolution

Measurement
Speed

Transfer
Speed

Fast

3 1/2 digits

60 readings/second

Typical 17ms

Medium

4 1/2 digits

30 readings/second

Typical 34ms

Slow

5 1/2 digits

10 readings/second

Typical 100ms

 

The GDM-8255A/8251A offer selectable measurement speed rates under different modes. The speed rates allow you to maximize measurement efficiency while maintaining sufficient accuracy. In fast mode, the instrument delivers 60 readings/sec (see table below), adequately meeting today's speed demands. The display can be turned off by pressing the OUTPUT ON/OFF button at anytime. When using remote control, the display can be turned off to increase the measurement speed by reducing the operating load.

 

 

Diverse Measuring Combinations with VFD Dual Color Display

 

Offering a variety of dual display combinations, the GDM-8255A/8251A allows a main measurement function and an auxiliary measurement function to be displayed at the same time. The dual measuring function will save measurement time when dealing with applications requiring multiple simultaneous parameters. The high quality dual color VFD (Vacuum Fluorescent Display) is strongly illuminated with a clear contrast for both red and green.

 

 

Multiple Standard Interfaces

 

The GDM-8255A/8251A provides multiple interfaces for PC connection as standard: RS232C and USB. With RS232 and USB as standard, remote control and data transfer is faster and smoother. Without the need for expensive propriety communication interfaces, costs are significantly reduced for PC control and monitoring. In addition, the digital I/O terminal outputs comparison measurement results to control external devices for ATE applications and the VCC output can be used as a power source for TTL or CMOS circuits.

 

 

Convenient PC Software

For convenient remote control and long data captures, the GDM-8255A/ 8251A is accompanied with free software, DMM-Viewer. This software allows users to remotely control the GDM-8255A/8251A without the need to issue commands or develop new program interfaces. DMM-Viewer's software interface resembles the GDM-8255A/8251A front panel, shortening training. For data capturing through a PC, the software allows you to observe measurement results before saving to a file for further study. Additionally saved files can be loaded and viewed as a graph. With DMM-Viewer, operating the GDM-8255A / 8251A multimeter can be much more effective.

 

 

Effective Multiple Measurement Scanner Card

 

 

Each scanner card has 16 general purpose channels and 2 extra channels for current (ACI, DCI) measurements. All channels are fully isolated (Hi and Lo). Up to two scanner cards can be inserted into each multimeter for a maximum of 36 channels. These optional modules not only provide customers with a complete hands-free multiple measurement solution, but also provide a cost effect upgrade path compared to purchasing dedicated instruments. (OPTIONAL for GDM-8255A only)

Specification:

 
GDM-8255A
GDM-8251A
FULL SCALE
 
199,999 Counts
120,000 Counts
SAMPLAE RATE
Slow 5 1/2 digits, 10 readings/second
Medium 4 1/2 digits, 30 readings/second
Fast 3 1/2 digits, 60 readings/second
DC VOLTAGE
Range 100mV, 1V, 10V, 100V, 1000V 5 ranges
Accuracy ±(0.012% rdg + 5 digits)
Input Impedance 10MΩ
AC VOLTAGE True RMS
Range 100mV, 1V, 10V, 100V, 750V 5 ranges
Accuracy 20Hz~45Hz : ±(1% rdg + 100 digits)
45Hz ~ 10kHz : ±(0.2% rdg + 100 digits)
10kHz ~ 30kHz :±(1% rdg + 100 digits)
30kHz~100kHz : ±(3% rdg + 200 digits)
Input Impedance 1.1MΩ in parallel with approx. 100pF
DC CURRENT
Range 10mA, 100mA, 1A, 10A 4ranges
Accuracy 10mA , 100mA : ±(0.05% rdg + 15 digits)
1A, 10A range : ±(0.2% rdg + 5 digits)
AC CURRENT True RMS
Range 10mA, 100mA, 1A, 10A 4ranges
Accuracy 10mA , 100mA range:
20Hz ~ 50Hz : ±(1.5% rdg + 100 digits)
50Hz ~ 10kHz : ±(0.5% rdg + 100 digits)
10kHz~20kHz : ±(2% rdg + 200 digits)
1A , 10A range:
50Hz~10kHz : ±(1% rdg + 100 digits)
RESISTANCE
Range 100Ω, 1kΩ, 10kΩ, 100kΩ, 1MΩ, 10MΩ, 100MΩ 7 ranges
2W Accuracy 100Ω range : ±(0.1% rdg + 8 digits)(*)
1kΩ range : ±(0.08% rdg + 5 digits)(*)
10kΩ ~ 1MΩ 3 ranges : ±(0.06% rdg + 5 digits)
10MΩ range : ± (0.3% rdg + 5 digits)
100MΩ range : ±(3% rdg + 8 digits)
4W Accuracy 100Ω range : ±(0.05% rdg + 8 digits)
1kΩ ~ 1MΩ 4 ranges : ±(0.05% rdg + 5 digits)
10MΩ range : ±(0.3% rdg + 5 digits)
100MΩ range : ±(3% rdg + 8 digits)
DIODE TEST
  Open Circuit Voltage 2.0V
Test Current 0.5mA
FREQUENCY
  10Hz~800kHz
CONTINUITY BEEPER
  1 ~ 1000Ω Define by user
TEMPERATURE
  0° C ~ 300° C : J , K , T Type
OTHER FUNCTIONS
  Auto range / Manual, Math : MX + B/ % / 1/X
Max, Min, dBm, dB, REL, Hold, Compare, Store, Recall
DISPLAY
  VFD, Two Colors Display
INTERFACE
  Digital I/O, USB Device, RS-232C
POWER SOURCE
  AC 100V-240V ±10%, 50/60Hz
OPTIONAL
  GDM-SC1 : Multi-channels (16+2) Scanner Card
(Up to 2 sets of GDM-SC1 can be installed at same time for one GDM-8255A) 
DIMENSIONS & WEIGHT
  265(W) x 107(H) x 350(D) mm
Approx. 2.6 kg

Note : (*)USE "REL" Mode

Accessories:

Quick start user manual 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 (Compatible with Fluke 5720A/5725A calibrators only)
 
 
OPTION
Opt.01 Scanner Card (GDM-SC1)
 
 
OPTIONAL ACCESSORIES
GTL-108A  4W Type test lead
GTL-232  RS-232C Cable, 9-pin Female to 9-pin, null Modem for Computer

Ordering Information:

GDM-8255A 199,999 Counts Dual Display Digital Multimeter
GDM-8251A 120,000 Counts Dual Display Digital Multimeter

Download:

Marcom Tool
 
 
Description
 
 
 
     1680 K     GDM-8200A Series Brochure    en    V0   2010/5/4
     355 K     GDM-8200A Product Information    en    V0   2009/11/17

 

Manual
 
 
Description
 
 
 
     3031 K     GDM-8200A User Manual (pdf)    en    EE1   2013/08/07
     756 K     GDM-8200A Quick User Guide (pdf)    en    EE1   2013/08/07
     921 K     DMM-Viewer (PC Software) Guide    en    EE1   2013/08/07

 

Examples
 
 
Description
 
 
 
     70 K     How to create the loading Default when power on.    en    V1   2012/10/23

 

Software
 
 
Description
 
 
 
     8256 K     DMM-VIEWER(.rar)    en    EE1   2014/02/27
     895 K     LabVIEW Driver (for LabVIEW 2009)    en    V0   2012/12/25
     964 K     LabVIEW Driver (for LabVIEW 8.5)    en    V0   2012/12/25
     881 K     LabVIEW Driver (for LabVIEW 7.1)    en    V0   2010/3/8
     3318 K     USB Driver    en    EE1   2014/02/27
     4178 K     Firmware Update Program & Procedure    en    EE1   2013/08/07

 

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