2680A/2686A
Users Manual
A-12
Table A-15. PAI Module 4-Wire Resistance Accuracy Specifications
Accuracy,
3
σ
+ (% input + V)
18
°
C to 28
°
C -10
°
C to 60
°
C
Range
90 Day
1 Year
1 Year
Slow Fast Slow Fast Slow Fast
300
Ω
.015%+20
m
Ω
.02%+80
m
Ω
.02%+50
m
Ω
.02%+120
m
Ω
.084%+126
m
Ω
.084%+336
m
Ω
3 k
Ω
.02%+.3
Ω
.02%+.8
Ω
.02%+.5
Ω
.02%+1.2
Ω
.084%+1.26
Ω
.084%+3.36
Ω
30 k
Ω
.03%+3
Ω
.04%+10
Ω
.03%+5
Ω
.04%+15
Ω
.126%+12.6
Ω
.168%+42
Ω
300 k
Ω
.1%+40
Ω
.2%+100
Ω
.1%+60
Ω
.2%+150
Ω
.42%+168
Ω
.84%+420
Ω
3 M
Ω [1]
.25%+800
Ω
.5%+10
k
Ω
.25%+1
k
Ω
.5%+1.5
k
Ω
1.05%+3.36
k
Ω
2.1%+4.2
k
Ω
[1] The 3 M
Ω
range is susceptible to the absorption of humidity under extreme conditions. If the instrument is
operated normally within its specified temperature-humidity range, the 3 M
Ω
range meets its accuracy specifications.
However, if the instrument is “soaked” at 50
°
C, 90% relative humidity, the 3 M
Ω
range may require 1 hour of “dry-
out” time at 25
°
C, <40% relative humidity for each hour of soak time in order to achieve its specified accuracy.
PAI Module 2-Wire Resistance Measurement Specifications
The PAI Module specifications for the two-wire resistance measurement function
is based on the four-wire resistance measurement specification (above) except you
add a nominal 5
Ω
(10
Ω
maximum) positive offset. This value varies for each
channel and with temperature (n1%/ºC).
Summary of Contents for 2680A
Page 8: ......
Page 14: ...2680A 2686A Users Manual vi ...
Page 20: ...2680A 2686A Users Manual 1 2 ...
Page 98: ...2680A 2686A Users Manual 2 62 ...
Page 196: ......
Page 228: ...2680A 2686A Users Manual A 32 ...
Page 236: ...2680A 2686A Users Manual C 4 ...
Page 242: ...2680A 2686A Users Manual D 6 ...
Page 274: ...2680A 2686A Users Manual 6 ...