没关系。 但是,我们建议您可以固定螺丝以获得更好的测量效果。 带螺丝的金属片连接到机箱接地; 因此,固定螺丝可以减少环境噪音和静电。
不同之处在于“延迟时间设置”。 对于“STEP”,延迟时间设置在每个通道之间。 对于 SCAN,延迟时间设置在 10 通道切换到另一个通道之间。
2 线方法是常用的,因为它是最简单和最直接的方法。 在 2 线制中,您可以相对轻松地获得 100 kΩ 以上的准确测量值。 对于电阻(欧姆)低于 100 kΩ 的精密测量,4 线比 2 线工作更可靠、更方便。 4 线制需要 4 线制开关和更多布线。 您可以决定权衡是可以接受的,这取决于系统的准确性与复杂性要求。
下图显示了 4 线电阻(欧姆)测量,包括引线和开关电阻:
电流(安培)被迫通过源引线(HI、LO)。 结果,被测电阻(欧姆)两端会产生电压。 通过使用感测引线直接测量电阻两端的电压,互连的电压降 (RLEAD) 被忽略。
我们的热电偶适配器为迷你连接器和标准连接器提供标准插座。
【Step 1】Verify that the meter is disconnected as shown as the Figure 2-6.
Figure 2-6
【Step 2】Open the voltage setting selector cap as shown as the Figure 2-7. (You might need a pair of tweezers to do so)
Figure 2-7
【Step 3】Remove the red voltage setting selector from the right middle seam as shown in Figure 2-8. (You might need a pair of tweezers to do so)
Figure 2-8
【Step 4】Remove the broken fuse from the selector as shown in Figure 2-9.
Figure 2-9
【Step 5】Replace with the new fuse as shown in Figure 2-10.
Figure 2-10
【Step 6】Insert the voltage setting selector back into the socket and close the cap as shown in Figure 2-11.
Figure 2-11
【Step 7】Make sure the power switch on the front panel is in "Power OFF" condition before
plugging as shown in Figure 2-12.
Figure 2-12
Power switch:
"POWER OFF"
【Step 8】After finishing the above procedures, you can plug in your power cord as shown in
Figure 2-13.
Figure 2-13
【Step 9】Press on the power switch on the front panel for activating M3500A as shown in
Figure 2-14.
Figure 2-14
Power switch:
"POWER ON"
参考附件小程序