After the flow meter is installed, let the pipeline fluid normal delivery, preferably in the fluid is not used only cycle, so that the actual flow rate is as stable as possible, the panel will display a flow value right, but not sure if the actual flow rate is consistent, the following is calibrated.
Find another calibrated flowmeter (generally use a calibrated portable ultrasonic flowmeter, how to use it is not much to say), measure the actual flow rate in the pipeline, and the GF panel comparison, if the display is inconsistent, through the following steps to adjust your GF flowmeter (up the key referred to as the upper key, down the key referred to as the lower key):
Press and hold down "ENTER "key for 2 seconds to enter the calibration interface (do not press too long, 5 seconds is into the operation interface, if you want the password, the default is "up up up down"). Press up or down to find "FLOW K-FACTOR", adjust the value of the item, adjusted at the same time after holding down the upper and lower save and exit (of course, you do not know how much FLOW K-FACTOR to set up on the right, so you have to enter a few times, according to the value of the value you set up with the flow rate of change in the situation to adjust).When the flow rate is adjusted to match the value of the other meter, make a note of the FLOW K-FACTOR value.
Enter the calibration interface again and find "TOTALL ?K-FACTOR" ?
FLOW K-FACTOR is the parameter for instantaneous flow, TOTALL K-FACTOR is the parameter for cumulative flow.
You can also download the K-value calculator from its website, fill in your pipe information and probe type, calculate the K-value you want, and change it directly, so that you don't need other flow devices, but it's not clear if there is any error.