The component can be configured to Standby mode by designating CMODE=0 and 1SHOT=1.
If the sampling period is 1/60 for a 50Hz filter setup, the sampling duration is 185ms. Therefore the required time gap between sampling is 185ms*59=10.9s, which means a single conversion is initiated per 11 second. The measurement of standby current should be conducted after the component completes conversion.
The other method for measuring standby current is to directly measure the power supply's current when the component is connected to power. Do not setup any register at the moment. The component has to be in standby mode at this time.