Fluke 5790A Service Manual page 116

5790A
Service Manual
Step Name
Basic DC
Sensor turnover -2.0
Sensor turnover 0.7
Sensor turnover 0.7
1000 V Positive DC
1000 V Negative DC
700 V Positive DC
700 V Negative DC
220 V Positive DC
220 V Negative DC
70 V Positive DC
70 V Negative DC
22 V Positive DC
22 V Negative DC
7 V Positive DC
7 V Negative DC
2.2 V Positive DC
2.2 V Negative DC
700 mV Positive DC
700 mV Negative DC
220 mV Positive DC
220 mV Negative DC
70 mV Positive DC
70 mV Negative DC
22 mV Positive DC
22 mV Negative DC
7 mV Positive DC
7 mV Negative DC
3-36
Table 3-10. Calibration Steps in Service Calibration
Voltage to Apply
2 V DC
-2 V DC
0.7 V DC
-0.7 DC
1000 V DC
-1000 V DC
600 V DC
-600 V DC
200 V DC
-200 V DC
60 V DC
-60 V DC
20 V DC
-20 V DC
6 V DC
-6 V DC
2 V DC
-2 V DC
600 mV DC
-600 mV DC
200 mV DC
-200 mV DC
60 mV DC
-60 mV DC
20 mV DC
-20 mV DC
6 mV DC
-6 mV DC
Tolerance of
Calibration Source
( PPM)
3
3
5
3
3
3
3
3
3
3
5
10
35
100
350
Purpose of
Calibration Step
Calibrates DACs and
thermal sensor. (This is
the unscaled range)
Corrects DC turnover
error
Corrects turnover error of
the RMS sensor at
minimum scale. After the
-0.7 V step, internally
calibrates the range
zeros
Establishes gain and DC
offset for the 1000 V
range
Establishes gain and DC
offset for the 700 V
range
Establishes gain and DC
offset for the 220 V
range
Establishes gain and DC
offset for the 70 V range
Establishes gain and DC
offset for the 22 V range
Establishes gain and DC
offset for the 7 V range
Establishes gain and DC
offset for the 2.2 V range
Establishes gain and DC
offset for the 700 mV
range
Establishes gain and DC
offset for the 220 mV
range
Establishes gain and DC
offset for the 70 mV
range
Establishes gain and DC
offset for the 70 mV
range
Establishes gain and DC
offset for the 7 mV range