Calculated ratio is the target/desired value of turns in windings.
ATRI-3 calculates the actual ratio using voltage at LT and HT side.
Then % deviation is calculated.
Steps to change CR (Calculated Ratio) –
Suppose if user want to set CR at 88.05 .
1. When the instrument starts, it shows the previous set value of CR.
2. To change the value of CR, press “Dev.” Key, following page will appear.
3. Enter the desired value of CR using 4X4 keypad.
4. For cancel the changed reading , press F4 and for saving the changed
reading press ENTER.
Now “Ratio” page will come. The last changed reading will be save in