BOP-1K 111315 4-3The digital voltmeter (DVM) used to measure output voltage and the voltage across the currentsensing resistor should have at least six digits, multiple ranges, the smallest resolution must beat least one microvolt and the accuracy must be at least 0.0001%.To calibrate the external programming capabilities of the BOP a DC reference voltage with thefollowing minimum specifications is required.• Value: 0.0V ±0.1mV and 10.0V ±0.1mV (either positive and negative or floating)• Stability: better than 10 -5• Internal Impedance: better than 0.1 Ohms• Output Current: >0.5mA when sourcing, >0.15mA when sinkingTABLE 4-2. SUGGESTED SENSE RESISTORSMODEL VALUE KEPCO PART NO. MANUFACTURER MANUFACTURER PART NO.BOP 6-125MGBOP 10-75MGBOP 20-50MGBOP 25-40MGBOP 36-28MG0.001 OHM 115-3033 ISOTEK RUG-Z-R001-0.1 TK10BOP 50-20MGBOP 72-14MGBOP 100-10MG0.01 OHM 115-2997 ISOTEK RUG-Z-R010-0.1 TK10NOTE: Selected sense resistor must be mounted on a heatsink with a minimum surface area of 36 square inches to maintain ther-mal stability during calibration; forced cooling is recommended. Kepco Heatsink P/N 136-0451 will provide adequate cool-ing for the sense resistor.TABLE 4-3. VOLTAGE CALIBRATION MEASUREMENTS AND TOLERANCESMODELVOLTAGEZERO(TOLERANCE)±FULL SCALEVOLTAGE±FULL SCALEVPR LIMITMAX. MIN. TOLERANCE MAX. MIN. TOLERANCEBOP 6-125MG 0V(±0.001V) 6V -6V ±0.001V 6V -6V ±0.002VBOP 10-75MG 0V(±0.001V) 10V -10V ±0.001V 10V -10V ±0.003VBOP 20-50MG 0V(±0.002V) 20V -20V ±0.002V 20V -20V ±0.006VBOP 25-40MG 0V(±0.003V) 25V -25V ±0.003V 25V -25V ±0.008VBOP 36-28MG 0V(±0.0036V) 36V -36V ±0.0036V 36V -36V ±0.01VBOP 50-20MG 0V(±0.005V) 50V -50V ±0.005V 50V -50V ±0.015VBOP 72-14MG 0V(±0.0072V) 72V -72V ±0.0072V 72V -72V ±0.022VBOP 100-10MG 0V(±0.01V) 100V -100V ±0.01V 100V -100V ±0.03V
