Attach a micron gauge to the male flare end, a gauge to the tee end, and a line from the tee to the pump. Turn the pump on and you will notice the side closest to the pump will be a lot lower than the other.
The WEEKNUM function is used in Excel to return the week number of a specific date in the year (a number between 1 and 54). It has two arguments, the 1st is required and the 2nd is optional: WEEKNUM(serial_number, [return_type]) Serial_number - any date within the week whose number you are trying to find.
How to get the week number from a date. To get the ISO week number (1-53), use idate('W', $timestamp) or strftime('%-V', $timestamp). To get the week number with a leading zero (01-53), use strftime('%V', $timestamp). $timestamp is a Unix timestamp, i.e. an integer value.