Fluke NetDAQ 2645A - Manual (Page 231)

Specifications
2645A Specifications
A
A-21
2645A 4-Wire Resistance Measurement Specifications A-24.
Tables A-30 to A-32 provide 2645A specifications for the 4-wire resistance
measurement function. The 4-wire measurements use 2 input channels a decade
apart, e.g., channels 4 and 14.
Table A-30. 2645A 4-Wire Resistance Temperature Coefficient
Specification Characteristic
Temperature Coefficient Add 1/10th the 90 day specification per º C
above 28 º C or below 18 º C.
Accuracy at -20 ºC Multiply the -10
°
C to + 60
°
C accuracy
specification by 2. After 1 hour warm-up. For
accuracy between -10
°
C and -20
°
C, interpolate
linearly.
Table A-31. 2645A 4-Wire Resistance Range and Resolution Specifications
Range
Resolution
Current
Applied
Full Scale
Voltage
Maximum
Voltage
Slow Fast
Applied
300
Ω
10 m
Ω
30 m
Ω
1 mA 300 mV 3.5V
3 k
Ω
100 m
Ω
300 m
Ω
100 µA 300 mV 3.5V
30 k
Ω
1
Ω
3
Ω
10 µA 300 mV 3.5V
300 k
Ω
10
Ω
30
Ω
10 µA 3.0V 3.5V
3 M
Ω
100
Ω
300
Ω
1 µA 3.0V 3.5V
Table A-32. 2645A 4-Wire Resistance Accuracy Specifications
Accuracy, 3
σ ±
(% input + V)
18 º C to 28 º C -10 º C to 60 º C
Range
90 Day 1 Year 1 Year
Slow Fast Slow Fast Slow Fast
300
Ω
.02%+60 m
Ω
.02%+.1
Ω
.02%+.1
Ω
.02%+.2
Ω
.084%+.25
Ω
.084%+.42
Ω
3 k
Ω
.02%+.6
Ω
.02%+2
Ω
.02%+1
Ω
.02%+3
Ω
.084%+2.5
Ω
.084%+8.4
Ω
30 k
Ω
.02%+6
Ω
.2%+200
Ω
.02%+10
Ω
.2%+300
Ω
.084%+25
Ω
.84%+840
Ω
300 k
Ω
.5%+80
Ω
1%+2 k
Ω
.5%+150
Ω
1%+3 k
Ω
2.1%+336
Ω
4.2%+8.4 k
Ω
3 M
Ω
1.3%+1 k
Ω
2%+120 k
Ω
1.3%+2 k
Ω
2%+200 k
Ω
5.46%+4.2 k
Ω
8.4%+200 k
Ω