User Manual - Rev AV AMETEK Programmable PowerMX Series 1806.5.2 Current Limit CalibrationNote: This procedure only applies to MX Systems with top assembly P/N 7003-400-1(Series I). If the MX system is P/N 7003-422, this section can be skipped. To checkthe model top assembly part number, consult the model and serial tag on the rearon the MX chassis.Program the output to 135V, 60Hz on the low range. Program the current limit to IPROG inTable 6-5 below, set limiting mode to Constant Current (CC).Apply 105 to 110% of IPROG load to phase A output. Now adjust R195 on the system interfaceboard (P/N 7003-700-1) until the output current is 103% of IPROG (ISET).When this adjustment is being made the front panel OVERLOAD indicator should be lit.If system is 3-phase, then proceed to the phase B output and adjust R196 as above. For phaseC output adjust R197.MODEL IPROG ISET ADJUSTMX30-1 200 206 R195MX30-1 66 68 R195, R196, R197MX45-1 300 309 R195MX45-3 100 103 R195, R196, R197MX90 200 206 R195, R196, R197MX135 300 309 R195, R196, R197Table 6-5: Current Limit CalibrationRepeat this adjustment for the Phase B and Phase C if present.
