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: 전체 : LCR 미터 : 저저항계 : 고저항계
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고정밀 프로그래머블 DC 밀리옴미터...☞상세보기 hit: 1343
 모델명 : GOM-805/804
 브랜드 : GWINSTEK

 

​ 주요사양 및 장점

•  모델명 : GOM-804, GOM-805

•  카운트 : 50,000 카운트

•  기본 정확도 : 0.05%

​ 특 징

•  50,000 카운트 디스플레이

•  3.5인치(320x240) TFT LCD 디스플레이

•  0.05% 높은 정확도

•  1A 테스트 전류, 1uΩ 분해능

•  측정 속도 : 최대 60 read/s

•  4선 측정 방식

•  온도 보정 측정 기능

•  지연 측정 기능

•  20세트 패널 설정 메모리

•  Dry 회로 (GOM-805)

•  드라이브 모드 : DC+/DC-, Pulsed, PWM, Zero(GOM-805)

•  기본 인터페이스 : USB, RS-232C, Handler/Scan/EXT I/O

•  옵션 인터페이스 : GPIB (GOM-805는 기본 장착)


 상세설명

GW Instek launch a new series of D.C. milliohm meter ─ GOM-804/805, which abundantly feature 3.5-inch TFT display, maximum 50,000 counts measurement display, the rapid sampling rate of 60 readings per second, optimum 0.05% measurement precision, four wire measurement method as well as the temperature measurement and temperature compensation measurement function to meet the requirement of low resistance measurement application. The GOM-805 also includes various drive modes and Dry circuit for contact resistance measurement applications. More features, including 20 sets of panel setting memory and many external control interface such as RS-232C, USB, Handler/Scan/EXT IO or GPIB (option), greatly elevate GOM-804/805 milliohm meter’s convenience on practical applications.

GOM-804/805 adopt 3.5-inch color LCD to enhance the clarity of measurement results and to provide display for related setting criteria that tremendously brings up the completeness of test information. Additionally, GOM-804/805, with the optimum 0.05% precision, augment the measurement speed to 60 sampling rate per second and maintain the display digits of five instead of four despite of different speed selections. Furthermore, the independent functionality keys and direction keys together increase the operational convenience which allows users to complete their measurement tasks with intuitive convenience and speed.

GOM-805 provides Dry circuit and various drive modes (DC+, DC-, Pulsed, PWM) for measurement applications on different materials. The pulsed current output mode is suitable for interacting conductors of different materials and this output mode is to reduce the thermal EMF influence, which is caused by electric potential difference generated from different conductors acting on different temperatures while conducting low resistance measurements. The DC+ and DC- output modes are best for the measurement requirements of inductive components. The PWM output mode, ideal for changing temperature sensitive materials, can avoid resistance value variation which is due to over load happened on current measurement for a long period of time. During the DC+, DC- and Pulsed drive is supplied; the Dry circuit can work with them also. Dry circuit can limit the applied voltage under the open circuit voltage of 20mV to avoid over voltage occurred on the both ends of components. The over voltage will damage the oxide coating and the thin layer of contact surface, as a result, the validity of measurement will then be ruined. For instance, contact resistance of connector measurement is one of the applications.

With respect to connecting the external control, GOM-804/805 provide a D-sub 25-pin combined interface to execute, according to the functionalities, Handler, Scan or EXT IO for respectively connecting to a sorting machine; connecting to an external on-off switch, and directly conducting external trigger control. For remote control and measurement result retrieval requirements, GOM-804/805 also provide various interface selections such as RS-232C, USB, and GPIB (GOM-804(option)/GOM-805(standard) interface. Furthermore, the control commands are compatible to that of GOM-802 that saves time in adjusting programs while switching from the old model to the new model.

To sum up, GOM-804 evolves from GOM-802 platform with more advanced functionalities and specifications, including display digits, measurement speed and standard interface (RS-232C/USB). With all the capabilities of GOM-804, GOM-805 augments itself with new measurement abilities (Dry circuit and various drive modes) to meet the requirements of broader low resistance measurement applications.

Totally replacing the existing models

In terms of the basic functionalities and specifications, GOM-804/805 can absolutely replace the existing model─GOM-802. All GOM-802 functionalities can be found from GOM-804/805, including resistance measurement range, 1A test current (maximum), four wire measurement method, temperature probe (option, accessory model: PT-100) for temperature measurement and temperature compensation measurement, etc. The programming commands are also compatible to that of GOM-802. To simply put it, the brand new GOM-804/805 not only provide better display interface, fast measurement (60 readings per second), but also collocate with standard communications interface (RS-232C/USB device) to facilitate users in accomplishing measurement tasks rapidly. On top of that, model switching will not be a problem.


Faster measurement without sacrificing resolution

GOM-804/805 has two measurement speed selections, which are Fast reaching 60 readings per second, and Slow 10 readings per second. A major departure from the past, users, in the past, had to juggle between speed and display resolution. GOM-804/805 will not affect resolution despite of any speed selections and will maintain the highest display digits. In other words, reading resolution will not be changed by changing speed and the display digits remain the same.

02  

Dry circuit test for GOM-805 only

Dry circuit is to limit test voltage and current to certain levels which will not cause contact points to produce physically or electrically changed circuit and its most frequently used application is contact resistance of connector measurement. Based upon MIL-STD-1344 method 3002-1 low signal level contact resistance, tests must be applied under the maximum open circuit voltage of 20mV (or lower), and short circuit current of 100mA (or lower) to avoid over voltage for the both ends of components. The over voltage will damage the oxide coating and the thin layer of contact surface, as a result, the validity of measurement will then be ruined. GOM-805 provides three levels (500mΩ:100mA/5Ω:10mA/50Ω:1mA) to limit open circuit voltage at 20mV to execute Dry circuit tests.

03

Various drive modes for GOM-805 only

GOM-805 provides various current output drive modes to satisfy diversified and accurate low resistance measurement applications. For instance, for interacting conductors of different materials, the pulsed current output mode can be applied to reduce the thermal EMF influence, which is caused by different conductors acting on different temperatures. The PWM output mode, ideal for changing temperature sensitive materials, can avoid resistance value variation which is due to over load on large current measurement in a long period of time. The DC+ and DC- output modes are best for the measurement requirements of inductive components.

04

Standard interface for control and communications

With respect to connecting the external control, GOM-804/805 provide a D-sub 25-pin composite interface to execute, according to the functionalities, Handler, Scan or EXT IO for connecting to a sorting machine; connecting to an external on-off switch, and directly conducting external trigger control respectively. For remote control and measurement result retrieval requirements, GOM-804/805 also provide various interface selections such as RS-232C, USB, and GPIB (GOM-804(option)/GOM-805(standard) interface.

05

Command compatiability

The commands of GOM-804/805 are compatible to that of GOM-802 that allows users to switch equipment with simple settings. There is no cost in adjusting existing programs and production delay will not be happening while switching from the old model to the new model.


​ 상세사양

GOM-804/805

DISPLAY

 

3.5"(320x240) TFT LCD, 50000 Counts

Sampling Rate

Slow

10 readings/s

Fast

60 readings/s

RESISTANCE

Range/Test Current

50mΩ/1A, 500mΩ/100mA, 5Ω/100mA, 50Ω/10mA, 500Ω/1mA, 5kΩ/100uA, 50kΩ/100uA, 500kΩ/10uA, 5MΩ/1uA 9 ranges

Accuracy

50mΩ : ±(0.1% of reading + 0.02% of range)
500mΩ ~ 50Ω : ±(0.05% of reading + 0.02% of range)
500Ω ~ 500kΩ : ±(0.05% of reading + 0.008% of range)
5MΩ : ±(0.2% of reading + 0.008% of range)

Resolution

1uΩ, 10uΩ, 100uΩ, 1mΩ, 10mΩ, 100mΩ, 1Ω, 10Ω, 100Ω

TEMPERATURE

Range

-50°C ~ 399.9°C

Accuracy

-10°C ~ -40°C : 0.3%+0.5°C
Other : 0.3%+1.0°C

Resolution

0.1°C

DRY CIRCUIT (GOM-805 Only)

 

Open circuit less than 20mV; For 500mΩ, 5Ω, 50Ω range only

DRIVE MODE (GOM-805 Only)

DC+ / DC-Yes
PulsedYes
PWMYes
ZeroYes

FUNCTION

Trigger – Internal, Manual, External、Math – ABS, REL, %, TC、Hi / Lo, Average 2 ~ 10 times、Measured delay、Go / No-Go、TC for Transformer,  Diode、Continuity beeper、Sorting (only for GOM-805)

MEMORY

20 Sets

INTERFACE

Standard : USB, RS-232C, Handler/Scan/EXT IO
Option : GPIB (Standard for GOM-805)

POWER SOURCE

AC 100V ~ 240V, 50/60Hz
Power Consumption : Max 25VA

DIMENSIONS & WEIGHT

223(W)×102(H)×283(D) mm, Approx. 4kg

 

​ 기본 악세사리

•  Quick Start Guide x 1

•  Power cord x 1

•  Test Lead : GTL-308 x 1

•  CD(User manual) x 1


​ 옵션 악세사리

•  Opt1. GPIB Card for GOM-804

•  PT-100 : Platinum Temperature Probe

•  GTL-232 : RS-232 Cable, 9pin, F-F type, Approx. 2000mm

•  GTL-248 : GPIB Cable, Approx. 2000mm

•  GTL-251 : GPIB-USB-HS (High Speed) Adaptor


​ 주문정보

•  GOM-804 : 고정밀 프로그래머블 DC 밀리옴미터 (USB, RS-232C, Handler)

•  GOM-804 GPIB : 고정밀 프로그래머블 DC 밀리옴미터 (USB, RS-232C, Handler, GPIB)

•  GOM-805 : 고정밀 프로그래머블 DC 밀리옴미터 (USB, RS-232C, Handler, GPIB)



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