Its measurement is the measurement of time, the status of the translucent screen Department or looking at the version will mesh ruler in wire mesh network, and then set the gauge wire edge network, so that the vertical line on the screen ruler and MEST warp or weft parallel, at which point due to the mesh screen coordinates and produces overlapping on vertical ruler that formed over the mesh inferion-edged chevrons patterns within the meaning of the transverse diagonal mesh feet on the scale of numbers, that is, the measured screen mesh size.
其丈量办法是：丈量时，首先使丝网处在透亮的状况下或不收在看版台下，不兵网纲尺不收在丝网上，然后不兵网纲尺在丝网上匆匆安放，使网纲尺上的竖线与丝网的不经线或经线交错，这时由于丝网经经线和网纲尺上竖线爆发重叠成果，在网纲尺上变成棱形斑纹，斑纹的横向对角所指的网纲尺上对应的刻度数字，即是所测丝网的纲数。