Datasheet

E3
E4
Made to Measure. Good Will Instrument Co., Ltd.
GDM-8255A (199999 Counts)
GDM-8251A (120000 Counts)
199999/120000 COUNTS DUAL DISPLAY DIGITAL MULTIMETER
FEATURES
BASIC T & M INSTRUMENTS BASIC T & M INSTRUMENTS
DC VOLTAGE
SAMPLE RATE
FULL SCALE
AC VOLTAGE True RMS
DC CURRENT
AC CURRENT TRUE RMS
RESISTANCE
DIODE TEST
FREQUENCY
Open Circuit Voltage 2.0V, Test Current 0.5mA
10Hz~800kHz
Range
GDM-8255A GDM-8251A
Accuracy
Input Impedance
Range
Accuracy
Input Impedance
Range
Accuracy
Range
Accuracy
Range
2W Accuracy
4W Accuracy
100mV, 1V, 10V, 100V, 1000V 5 ranges
Slow : 5 1/2 digits, 10 readings/second
Medium : 4 1/2 digits, 30 readings/second
Fast : 3 1/2 digits, 60 readings/second
199,999 Counts 120,000 Counts
(0.012% rdg + 5 digits)
10M
100mV, 1V, 10V, 100V, 750V 5 ranges
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)
1.1M in parallel with approx. 100pF
10mA, 100mA, 1A, 10A 4 ranges
10mA , 100mA : (0.05% rdg + 15 digits)
1A, 10A range : (0.2% rdg + 5 digits)
20Hz ~ 50Hz : (1.5% rdg + 100 digits)
50Hz ~ 10kHz : (0.5% rdg + 100 digits)
10kHz~20kHz : (2% rdg + 200 digits)
100 , 1k , 10k , 100k , 1M , 10M , 100M 7 ranges
100 range : (0.1% rdg + 8digits)(*)
100 range : (0.05% rdg + 8 digits)(*)
1k range : (0.08% rdg + 5 digits)(*)
10k ~ 1M 3 ranges : (0.06% rdg + 5digits)
1k ~ 1M 4 ranges : (0.05% rdg + 5 digits)
10M range : (0.3% rdg + 5 digits)
10M range : (0.3% rdg + 5 digits)
100M range : (3% rdg + 8 digits)
100M range : (3% rdg + 8 digits)
DISPLAY
INTERFACE
POWER SOURCE
DIMENSIONS & WEIGHT
NOTE : (*)USE "REL" Mode
VFD, Two Colors Display
Digital I/O, USB, RS-232C
AC 100V~240V 10%, 50/60Hz
265(W) x 107(H) x 350(D) mm, Approx. 2.6 kg
10mA, 100mA, 1A, 10A 4 ranges
TEMPERATURE
OTHER FUNCTIONS
CONTINUITY BEEPER
0 C ~ 300 C : J , K , T Type
Auto range / Manual, Math : MX + B/ % / 1/X
Max, Min, dBm, dB, REL, Hold, Compare, Store, Recall
1 ~ 1000 Define by user
SPECIFICATIONS
10mA , 100mA range :
1A , 10A range : 50Hz ~ 10kHz : (1% rdg + 100 digits)
GDM-8255A
GDM-8251A Rear Panel
GDM-8255A Rear Panel
GDM-8255A
GTL-108A
Opt.01
GDM-8251A
199,999 Counts Dual Display Digital Multimeter
4W Type test lead
Scanner Card (GDM-SC1 for GDM-8255A only)
120,000 Counts Dual Display Digital Multimeter
ACCESSORIES :
Quick start user manual x 1, Power cord x 1, Test lead GTL-117 x 1, USB Cable GTL-247
CD x 1 (including complete user manual, upgrade program and PC software DMM Viewer),
Calibration key GDM-01 x 1 (Compatible with Fluke 5720A/5725A calibrators only)
GTL-232
RS232C Cable, 9-pin female to 9-pin, null modem for computer
SPECIFICATIONS
DMM-Viewer PC Software
Multipoint Testing
can be facilitated
by simple insertion
of scanner card.
For: GDM-8255A
GDM-SC1 Scanner card
For: GDM-8255A/8251A
GTL-108A 4W Type Test Lead
For: GOM-801H/802 , GDM-8255A/8251A
GTL-232 RS-232C Cable
* 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)
The GDM-8255A/8251A portable precision multimeters feature 199,999/120,000 counts, a dual display,
a 0.012% DCV accuracy and 2w/4w measurement. The VFD display technology provides the excellent
observation of contrast and brightness.
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 remote control and data capturing for ATE applications.
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. 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)
ORDERING INFORMATION
OPTION
OPTIONAL ACCESSORIES
FREE DOWNLOAD
PC Software
DMM-VIEWER
Driver
USB Driver
LabVIEW Driver
Reload-Data GraphicGeneral Control Mode Scanner Control Mode
A-A type cable,
Approx. 1.8m
For: GDM-8255A/8251A
GTL-247 USB Cable
GTL-117 Test Lead
For: GDM-8255A/8251A,
GDM-8245/8246
For: GDM-8255A/8251A
GDM-01 Calibration key