中国台湾固纬Gwinstek微电阻计直流微欧姆计高精度低电阻计
GOM-804 with GPIB 直流微欧姆计
GOM-804/805采用3.5寸的彩色LCD显示幕，让量测结果更清晰易读外，也增加了相关设定条件的显示，大大的提升了测试资讯的完整度。GOM-804/805提升量测的速度到每秒60笔的取样速度的情况下，仍能提供0.05%准确度、而且显示位数也不会因为速度的选择而使原有的5位数，降低为4位数。另外，使用了独立的功能按键和方向键，也提高了操作上的便利性，让使用者更加直观便捷的完成所有量测的任务。
另外，GOM-805为因应不同类型的材料的量测应用，还提供乾电路(Dry circuit)和各式驱动模式(直流+/直流-、脉冲、脉冲宽度变调)。当不同材料的导体互相接触，因对温度变化不同所产生的电位差，可用脉冲电流输出模式，来降低在低阻测量时的热电动势影响。直流+/直流-电流输出模式，则适用於电感性元件的量测需求。而脉冲宽度变调输出模式，则适用於对温度变化敏感的材料，可避免因长时间量测电流的加载，造成阻值变化。当使用直流+、直流-和脉冲驱动模式时，可同时搭配乾电路(Dry circuit)进行量测；乾电路可将开路电压限制在20mV的情况，以避免元件两端的电压过高，破坏了接触点表面的氧化层或薄膜，进而破坏量测的有效性，例如连接器的接触电阻测量，就是一个典型的应用。
NOTE | Specifications are ensured only for GOM-804/805 at least 30 minute of warm-up time and Operating Temperature Specification: 18~28?C |
Display | 3.5&＃39;(320 x 240) TFT LCD |
Memory | 20 sets for panel setting |
Power Source | AC 100 - 240 V, 50/60Hz |
Comsumption | 25VA (max.) |
Dimension | 223(W) x 102(H) x 283(D) mm |
Weight | Approx.3kg(max.) |
Specifications
MODEL | GOM-804 | GOM-805 | |||||||||
DIS**Y | |||||||||||
| 50,000 counts | ||||||||||
SAMPLING RATE | |||||||||||
Slow | 10 readings / s | ||||||||||
Fast | 60 readings / s | ||||||||||
RESISTANCE MEASUREMENT | |||||||||||
Range / Test current (fixed) |
| ||||||||||
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 | 1?Ω, 10?Ω, 100?Ω, 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 | |||||||||||
| ----- | Open circuit less than 20mV; For 500mΩ, 5Ω, 50Ω range only | |||||||||
DRIVE MODE | |||||||||||
DC+/DC- | ----- | Yes | |||||||||
Pulsed | ----- | Yes | |||||||||
PWM | ----- | Yes | |||||||||
Zero | ----- | Yes | |||||||||
OTHER FUNCTIONS | |||||||||||
| 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) | ||||||||||
INTERFACE | |||||||||||
USB | Standard | Standard | |||||||||
RS-232C | Standard | Standard | |||||||||
HANDLER/SCAN/EXT I/O | Standard | Standard | |||||||||
GPIB | Option | Standard | |||||||||
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