Fluke 225C Service Manual - Page 32

Fluke 19xB-19xC-2x5C Service Manual 4. Using and move the Input A ground level (indicated by the zero icon in the left margin) to the center grid line. 5. Using and move the Input B ground level (indicated by the zero icon in the left margin) to the grid line one division below the center grid line. 6. Using and set the Input A and B sensitivity range to the first test point in Table 4-1. 7. Set the 5500A to source the appropriate initial ac voltage. 8. Adjust the 5500A output voltage until the displayed Input A trace amplitude is 6 divisions. 9. Observe the 5500A output voltage and check to see if it is within the range shown under the appropriate column. 10. Adjust the 5500A output voltage until the displayed Input B trace amplitude is 6 divisions. 11. Observe the 5500A output voltage and check to see if it is within the range shown under the appropriate column. 12. Continue through the test points. 13. When you are finished, set the 5500A to 0 (zero) Volt, and to Standby. Table 4-1. Vertical Accuracy Verification Points Range 2 mV/div 1) Initial 5500A Setting, V ac, sine, 50 Hz 4.243 mV 5 mV/div 10.606 mV 10 mV/div 21.213 mV 20 mV/div 42.426 mV 50 mV/div 106.06 mV 100 mV/div 212.13 mV 200 mV/div 424.26 mV 500 mV/div 1.0607 V 1 V/div 2.1213 V 2 V/div 4.2426 V 5 V/div 10.606 V 10 V/div 21.213 V 20 V/div 42.426 V 50 V/div 106.06 V 100 V/div 212.13 V 1) C versions only Allowable 5500A output for trace amplitude of 6 divisions 4.081 to 4.405 10.247 to 10.966 20.495 to 21.932 40.990 to 43.862 102.475 to 109.657 204.950 to 219.314 409.90 to 438.62 1.02475 to 1.09657 2.04950 to 2.19314 4.0990 to 4.3862 10.2475 to 10.9657 20.4950 to 21.9314 40.990 to 43.862 102.47 to 109.65 204.95 to 219.31 4-8