• 120,000 counts, VFD display
• Dual measurement/Dual display
• The basic precision of DC voltage: 0.012%
• Selectable measurement speeds, the maximum: 320 Readings/s
• True RMS (AC，AC+DC) measurements
• Auto/manual selection
• 12 different measurement functions: AC/DC voltage, AC/DC current, AC+DC voltage/current, 2W/4W resistance, continuity beeper, diode test, capacitance, frequency, temperature
• Many auxiliary functions: Max./Min., REL/REL#, Compare, Hold, dB, dBm, Math (MX+B, %, 1/X)
• Digital I/O provides dual mode (standard Compare and User definition modes)
• Standard RS-232C and USB device interface (support USBCDC and USBTMC modes)
GW Instek presents the brand new 5 1/2 Digit Dual Measurement Multimeter─ GDM-8351 to replace GDM-8251A of the same category. GDM-8351 features VFD dual-display, maximum 120,000 counts, 0.012% basic DC voltage accuracy and USB/RS232C connectors to provide users with measurement precision, lucid data observation, and the convenient connection with the personal computer.
In addition to the fundamental measurement items such as AC/DC voltage, AC/DC current, AC+DC voltage/current, 2W/4W resistance, frequency, temperature measurement, continuity beeper and diode test, GDM-8351 also equips with the capacitance measurement function. Furthermore, the GDM-8351 also provides many auxiliary functions, including maximum/minimum values, dB, dBm, compare, reading hold, algorithms (MX+B, 1/X, %) etc. to meet the measurement requirementsfor manufacturing process tests, educational experiments and testing facilities.
For the external control, the pin of digital I/O interface not only provides the signal output frequently used by the compare function, but also allows users to define signal output for each pin. Under the self-definition mode, users can apply the I/O as a simple digital hardware. The external control requirement can be achieved by signals from each pin so as to help users reduce trouble of making hardware.
With respect to remote control and retrieving data, GDM-8351, taking consideration of users’ habitual practice and universal system interface, provides standard RS-232C and USB interface to edit control programs and read measurement results. It is worth noting that for utilizing the USB interface, users have options of selecting either USBCDC or USBTMC mode. While USBTMC is selected, users are able to control instrument with the USB interface exactlythe same as controlling instrument with the GPIB interface; therefore, the relatively expensive GPIB connection cable is no longer required.
Dual measurement/Dual display
GDM-8351, similar to GW Instek 6 1/2 and 5 1/2 digit multimeters, equips with VFD dual display to support the possible combinations of measurement items. For example, the DC voltage and current or DC voltage with AC element will appear when monitoring components of test wiring. The results of each measurement will simultaneously appear on different displays that not only save users’ precious time but also exempt users from the trouble of selecting displayswhile reading measurement results.
Selectable measurement speeds
GDM-8351 has fastest measurement speed among the same category products and three selectable measurement speeds are available - slow/medium/fast. For instance, the DC voltage measurement can reach 320 readings per second on the fast mode, which can maximize the effectiveness of each measurement.
Various measurement items and functionalities
GDM-8351 provides various measurement items and functionalities compared with that of the products of same category. There are twelve major measurement items of GDM-8351, including AC voltage/current, DC voltage/current, AC+DC voltage/current, two-wired and four-wired resistance, temperature, frequency, diode and continuity beeper test, and even the capability of measuring capacitance. Many auxiliary functions, such as maximum/minimum values, reading hold,relative values, dB, dBm, algorithms (MX+B, 1/X, %) and compare, are designed to reinforce the major measurement items to satisfy users’ daily working requirements.
Convenient Digital I/O function
Another difference, while comparing with GDM-8251A, is that the Digital I/O of GDM-8351 provides two different modes which are general and self-definition. With the general mode, Digital I/O will output Hi Fail、Lo Fail、Pass and EOM (end of measurement) based upon the results of the compare function and, furthermore, external trigger input is also provided. Under the self-definition mode, users can define output conditions for four pins (SET1~SET4) toexecute the external control.
Free software-remote control and data retrieving
GDM-8351 provides free software- Excel ADDins for users’ easy access. After installing the software, Microsoft Excel will establish Marco for users to directly control the setting of GDM-8351 to record the results of the measurements. The recorded data will be synchronously transformed into graphic displays via Excel drawing function that not only eliminates the cost and time of developing programs but also overcomes the compatibility issue of differentprogramming languages.
For GDM-8251A users, GDM-8351 also provides compatible commands. Users can replace machines through the simple setting of GDM-8351 without worrying the extra cost to modify the existing program and the delay of production time.