4-4 BOP-1K 1113154.3 CALIBRATION USING REMOTE SCPI COMMANDS VIA GPIB OR RS 232 INTERFACEThe primary means of adjustment are the CAL:DATA commands. Basically these commandsare fine and coarse adjustments, however there are slight differences in how they work for dif-ferent types of calibrations.a. ZERO Calibrations (always done first). The only means of adjustment is theCAL:DATA command which provides a total of 4095 increments of adjustment start-ing at 0, with 2047 increments in either direction to achieve maximum output levels of ±2.5% ofE Onom . Adjust the output to obtain the closest value to zero.TABLE 4-4. CURRENT CALIBRATION MEASUREMENTS AND TOLERANCESMODELSENSERESISTORVALUE(SEE NOTEAND TABLE 4-2)CURRENTZERO(TOLERANCE)±FULL SCALECURRENT±FULL SCALECPR LIMITMAX. MIN. TOLERANCE MAX. MIN. TOLERANCEBOP 6-125MG 0.001 Ohm 0V(±0.0013mV) 0.125V –0.125V ±0.013mV 0.125V –0.125V ±0.063mVBOP 10-75MG 0.001 Ohm 0V(±0.008mV) 0.075V –0.075V ±0.008mV 0.075V –0.075V ±0.038mVBOP 20-50MG 0.001 Ohm 0V(±0.005mV) 0.05V –0.05V ±0.005mV 0.05V –0.05V ±0.025mVBOP 25-40MG 0.001 Ohm 0V(±0.004mV) 0.04V –0.04V ±0.004mV 0.04V –0.04V ±0.02mVBOP 36-28MG 0.001 Ohm 0V(±0.003mV) 0.028V –0.028V ±0.003mV 0.028V –0.028V ±0.014mVBOP 50-20MG 0.01 Ohm 0V(±0.02mV) 0.2V –0.2V ±0.02mV 0.2V –0.2V ±0.10mVBOP 72-14MG 0.01 Ohm 0V(±0.014mV) 0.14V –0.14V ±0.014mV 0.14V –0.14V ±0.07mVBOP 100-10MG 0.01 Ohm 0V(±0.01mV) 0.1V –0.1V ±0.01mV 0.1V –0.1V ±0.05mVREFER TO NOTESFOR SENSERESISTOR VALUEOTHER THANLISTED HERERSENSESEENOTE.SEENOTE A.SEENOTEB.SEENOTEB.SEENOTEB.SEENOTEC.SEENOTEC.SEENOTEC.USE SPACEPROVIDED ATRIGHT FORCALCULATEDVALUES.NOTES: The following formulas are used to calculate proper calibration values for Sense Resistors other than thoserecommended.RSENSE = the measured value of the sense resistor in ohms (0.001% accuracy).IOnom = Nominal (rated) current output of BOP in Amperes (e.g., for BOP 50-20M, I = 20A)A. 0V, Tolerance = ±( RSENSE) x (0.1) x (IOnom)-- result in mV.B. (RSENSE) x ( IOnom)--result in V, Tolerance = ±( RSENSE) x (0.1) x ( IOnom)--result in mV.C. (RSENSE) x ( IOnom)--result in V, Tolerance = ±( RSENSE) x (0.5) x ( IOnom)--result in mV.
