You may also look at Metric Altimeter for some hints regarding the EPR settings.
In the middle there is a temperature scale, showing RAT (RAM Air Temperature) approximately the same as TAT (Total Air Temperature). There are 3 sets of scales NORM1, NORM2 and EMERGENCY. They are selected by the knob at the bottom.
Use the STA TO scale. Normal take off EPR is 2.055, valid from temp +15 to +30. But then you also have to check your pressure altitude. That is the airport altitude and pressure.
RAT pointer reads + 20º giving max EPR 2.055
Airport elevation is +90 ft
QNH is 1025mb - giving -340ft
In total -250ft standard pressure height which gives EPR 2.04. This is the max take off EPR, since this is the lowest EPR.
Read the EPR on the right scale MCL.
DESCENT AND LANDING.
EPR bugs is set when reading the "Descend Check List".
Normal go around EPR is 2.02. Valid from + 15 to +30º. But use the temp given in the ATIS and add 5º. As during take off, also check the pressure altitude.