The calibration of the meter should be controlled by the operator with the transferring liquid (and should be adjusted if necessary). In general, to calibrate the meter using specific liquid and assemble increases the sensitivity. The ER 72M E3014 meter can not be sensitive more than % ± %0.25 defined in the factory. 

1. It is important to test the repeability and sensitivity of the meter. To test the repeability; 

a. Do a fast test with the etalon scale and counter register (high flow rate in minute) and record how much or little the counter register counts. Do not change the calibration of the counter register. 

b. Do a slow test with the etalon scale and counter register (low flow rate in minute) and record how much or little the counter register counts.