When using the gauge to fill your tank/pcp which end of the needle do you use? For example, if filling to 200bar would you stop at the beginning of the needle on 200 or the back, which is right?Â
It doesn't matter. Fill to where your shot curve starts. If you have a reg then just stop a little before or after. No big difference. No safety concern
Most likely neither side of the needle is correct. The gauges are most often off by 10 to 20bar they are good for an approximate pressure. My FX arrived with a gauge that was 40+ bar off.
+1 on what Raden1942 said
When using the gauge to fill your tank/pcp which end of the needle do you use? For example, if filling to 200bar would you stop at the beginning of the needle on 200 or the back, which is right?