gbaglo
Senior Member
From the Sherline Towing Guide:
For maximum accuracy, use a gauge that will put your expected final measurement in about the middle of the gauge's range. (For example: for tongue weights of about 1000 lb. use a gauge that reads to 2000 lb.) The reason for this is that pressure gauges of this type are accurate to within about 2% in the middle ranges, but accuracy decreases at extreme low or high readings. To provide a gauge a few percent more accurate would increase the cost by 10 times or more. The supplied gauge was chosen as the most cost effective solution to providing a result that is sufficiently accurate for trailer weighing purposes. (The Sherline scale is not intended to be used for trade; i.e., items priced by weight.)
For maximum accuracy, use a gauge that will put your expected final measurement in about the middle of the gauge's range. (For example: for tongue weights of about 1000 lb. use a gauge that reads to 2000 lb.) The reason for this is that pressure gauges of this type are accurate to within about 2% in the middle ranges, but accuracy decreases at extreme low or high readings. To provide a gauge a few percent more accurate would increase the cost by 10 times or more. The supplied gauge was chosen as the most cost effective solution to providing a result that is sufficiently accurate for trailer weighing purposes. (The Sherline scale is not intended to be used for trade; i.e., items priced by weight.)