Fluke 5520A - 2-1. Introduction

Theory of Operation
Introduction
2
2-3
2-1. Introduction
This chapter provides a block diagram discussion of the calibrator’s analog and digital
sections. Figure 2-1 shows the arrangement of assemblies inside the 5520A. The
Oscilloscope Calibration Option is described in the Options chapter.
The 5520A produces calibration outputs of the following functions and ranges:
• DC voltage from 0 V to ±1000 V.
• AC voltage from 1 mV to 1000 V, with output from 10 Hz to 500 kHz.
• AC current from 0.01 µA to 20.5 A, with output from 10 Hz to 30 kHz.
• DC current from 0 to ±20.5 A.
• Resistance values from a short circuit to 1.1 GΩ.
• Capacitance values from 190 pF to 110 mF.
• Simulated output for Resistance Temperature Detectors (RTDs).
• Simulated output for thermocouples.
Main CPU (A9)
Filter (A12)
Voltage (A8)
Current (A7)
DDS (A6)
Synthesized Impedance (A5)
Oscilloscope Calibration Option (A4)
Encoder (A2)
Keyboard (A1)
Motherboard (A3)
FRONT
yg116f.eps
Figure 2-1. 5520A Internal Layout