Fluke 8060A - A;D Measurement Cycle

Theory of Operation
Functional Description
4
4-7
Read
2V dc
9R R
C
AZ
C
Integ
200 mV
dc
Integ
AZ
+
+
+
+
Reference
Voltage
Integrator Gain
Integrator Comparators
AZ
Integ or Read
To Digital
Control Logic
Buffer Amp
± Unkown
Input Voltage
Internal to the MAC
dx26f.eps
Figure 4-2. Analog Portion of the A/D Converter
A/D Measurement Cycle
AZ AZ
OL
Integ
100 ms
400 ms
Read
Overrange (“OL” on display)
Fullscale reading
Accumulated Counts
Waveform at
the Integ
Capacitor
OL 19999 10000 0
1
/
2
scale reading
dx27f.eps
Figure 4-3. A/D Measurement Cycle