Resistance Specifications - Fluke 5520A Service Manual

1-12. Resistance Specifications

Range
[1] ppm of output
90 days
0 to 35
10.9999
11 to 25
32.9999
33 to 22
109.9999
110 to 22
329.9999
330 to 22
1.099999 k
1.1 k to 22
3.299999 k
3.3 k to 22
10.99999 k
11 k to 22
32.99999 k
33 k to 22
109.9999 k
110 k to 25
329.9999 k
330 k to 25
1.099999 M
1.1 M to 40
3.299999 M
3.3 M to 110
10.99999 M
11 M to 200
32.99999 M
33 M to 400
109.9999 M
110 M to 2500
329.9999 M
330 M to 12000
1100 M
[1] Continuously variable from 0
[2] Applies for a 4-WIRE compensation only. For 2-WIRE and 2-WIRE COMP, add 5 µV per Amp of stimulus current
to the floor specification. For example, in 2-WIRE mode, at 1 k
zero cal for a measurement current of 1 mA is:
e
0.002 + 5 µV/1 ma = (0.002 + 0.005)
[3] For currents lower than shown, the floor adder increases by:
Floor (new) = Floor (old) XImin/Iactual.
For example, a 50 µA stimulus measuring 100
assuming an ohms zero cal within 12 hours.
Absolute Uncertainty, tcal
(ppm of output floor) [2]
Floor
Time & temp since ohms zero
1 year 12 hrs 1 C
40 0.001
30 0.0015
28 0.0014
28 0.002
28 0.002
28 0.02
28 0.02
28 0.2
28 0.2
32 2
32 2
60 30
130 50
250 2500
500 3000
3000 100000
15000 500000
to 1.1 G .
e e
= 0.007
e
, has a floor specification of: 0.0014
Introduction and Specifications
5 C
Resolution
cal
7 days 5 C
0. 01 0.0001
0.015 0.0001
0.015 0.0001
0.02 0.0001
0.02 0.001
0.2 0.001
0.1 0.01
1 0.01
1 0. 1
10 0.1
10 1
150 1
250 10
2500 10
3000 100
100000 1000
500000 10000
e
, the floor specification within 12 hours of an ohms
Specifications
Allowable
Current [3]
1 mA to 125 mA
1 mA to 125 mA
1 mA to 70 mA
1 mA to 40 mA
1 mA to 18 mA
100 A to 5 mA
100 A to 1.8 mA
10 A to 0.5 mA
10 A to 0.18 mA
1 A to 0.05 mA
1 A to 0.018 mA
250 nA to 5 A
250 nA to 1.8 A
25 nA to 500 nA
25 nA to 180 nA
2.5 nA to 50 nA
1 nA to 13 nA
e e
X 1 mA/50 µA = 0.028 ,
1
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