I believe Owl is saying just use your pump and a hose to "manually" water.
To figure out the metering on a low pressure drip you; first figure out how much solution/water it takes to saturate your medium, then you make your drip line with even distribution as the primary parameter, assume the head count based on their stated flow rate at a fractional time. Then you put the drippers in an empty container and see how long it takes to produce the amount of solution/water in the container giving you your cycle on time, roughly. From there you can set a timer or just manually run it. (This is a nice vacation option)