Atec Fluke-2680 Series - Manual (Page 6)

6 Fluke Corporation Fluke 2680 Series Data Acquisition Systems
1 Total instrument accuracy for the indicated time period and ambient temperature
range. Includes A/D errors, linearization conformity, initial calibration error,
isothermality errors, reference junction conformity and power line voltage effects
within the range from 100VAC to 264VAC.
2 Sine wave inputs >2000 counts (slow), >200 counts (fast). Accuracies for crest
factor ≤2.0.
3 For two-wire measurements add 5Ω to basic accuracy (does not include lead-
wire resistances).
4 For two-wire measurements add 700-1000Ω to basic accuracy (does not include
lead-wire resistances). Ohms varies due to the resistance of the solid state
switches.
5 DIN/IEC 751 only, assumes no lead-wire resistance errors.
6 Resolution is 0.02°C or 0.04°F over the useful range of base metal thermocouples
(J, K, T, E, N, L, U) and 0.1°C or 0.2°F resolution for types R, S, B, and C with
slow scan.
7 Resolution is 0.2°C or 0.4°F over the useful range of base metal thermocouples (J,
K, T, E, N, L, U) and 1.0°C or 2.0°F resolution for types R, S, B, and C with slow
scan.
8 Accuracy for both slow and fast scan speeds.
9 Open thermocouple detection is performed on each thermocouple channel unless
defeated by computer command.
10 Using Stein hart – Hart thermistor polynomial: T = A+B (InR) + C (InR) 3
T = temp in °K
A, B and C = fitting constants
R = resistance of thermistor in Ω.
Measurement accuracy cont.
Model 2680A-PAI
AC Voltage
Range Resolution Frequency Accuracy 1,2 ,3σ σ σ σ σ,± (% input+counts)
Slow Fast
300 mV 1 µV 20 Hz-50 Hz 3.0%+25 6.0%+50
50 Hz-20 kHz 0.4%+25 1.0%+50
20 kHz-50 kHz 2.0%+30 3.0%+50
50 kHz-100 kHz 5.0%+50 5.0%+100
3V 100 µV Same frequencies, similar accuracies as above
30V 1 mV Same frequencies, similar accuracies as above
150/300V 10 mV Same frequencies, similar accuracies as above
RTD (Pt 100) Accuracy 1,5 , 3σ σ σ σ σ, ± °C (4-wire)
Temperature Resolution 90 Day, 1 Year,
°C °C 18 to 28°C 18 to 28°C
Slow Slow Slow
-200 0.003 0.06 0.09
0 0.003 0.09 0.13
100 0.003 0.10 0.16
300 0.003 0.14 0.21
600 0.003 0.19 0.30
Thermistor 10 2 k to 100 kΩ
-40 °C to 150 °C 0.003 0.3 0.4
Frequency Measurement Accuracy 1,8 , -20 to 60°C
Range Resolution Accuracy, 3σ σ σ σ σ,± (% input +Hz)
Slow Fast Slow Fast
15 Hz-900 Hz 0.01 Hz 0.1 Hz 0.05%+0.02 Hz 0.05%+0.2 Hz
900 Hz-9 kHz 0.1 Hz 1 Hz 0.05%+0.1 Hz 0.05%+1 Hz
9 kHz-90 kHz 1 Hz 10 Hz 0.05%+1 Hz 0.05%+10 Hz
90 kHz-900 kHz 10 Hz 100 Hz 0.05%+10 Hz 0.05%+100 Hz
1 MHz 100 Hz 1 kHz 0.05%+100 Hz 0.05%+1 kHz
Frequency Measurement Sensitivity (sine wave)
Frequency Minimum Signal Maximum Signal
15 Hz - 200 Hz 100 mV rms 150/300V rms
200 Hz - 70 kHz 100 mV rms 30V rms
70 kHz - 100 kHz 100 mV rms 20V rms
100 kHz - 200 kHz 150 mV rms 10V rms
200 kHz - 300 kHz 150 mV rms 7V rms
300 kHz - 1 MHz linearly increasing from linearly decreasing from
150 mV rms at 300 kHz to 7V rms at 300 kHz to
2V rms at 1 MHz
2V rms at 1 MHz
Model 2680A-FAI
AC Voltage
Range Resolution Frequency Accuracy 1,2 ,3σ σ σ σ σ,± (% input+counts)
Slow Fast
300mV 10 µV 20 Hz-50 Hz 3.0%+25 6.0%+50
50 Hz-20 kHz 0.4%+25 1.0%+50
20 kHz-50 kHz 2.0%+30 3.0%+50
50 kHz-100 kHz 5.0%+50 5.0%+100
3V 100 µV Same frequencies, similar accuracies as above
30V 1 mV Same frequencies, similar accuracies as above
RTD (Pt 100) Accuracy 1,5 , 3σ σ σ σ σ, ± °C (4-wire)
Temperature Resolution 90 Day, 1 Year,
°C °C 18 to 28°C 18 to 28°C
Slow Slow Slow
-200 0.03 0.16 0.25
0 0.03 0.20 0.31
100 0.03 0.23 0.34
300 0.03 0.30 0.41
600 0.03 0.53 0.63
Thermistor 10 k to 100 kΩ
-40 °C to 150 °C 0.03 0.4 0.5
Frequency Measurement Accuracy 1,8 , -20 to 60°C
Range Resolution Accuracy, 3σ σ σ σ σ,± (% input +Hz)
Slow Fast Slow Fast
15 Hz-900 Hz 0.01 Hz 0.1 Hz 0.05%+0.02 Hz 0.05%+0.2 Hz
900 Hz-9 kHz 0.1 Hz 1 Hz 0.05%+0.1 Hz 0.05%+1 Hz
9 kHz-90 kHz 1 Hz 10 Hz 0.05%+1 Hz 0.05%+10 Hz
90 kHz-900 kHz 10 Hz 100 Hz 0.05%+10 Hz 0.05%+100 Hz
1 MHz 100 Hz 1 kHz 0.05%+100 Hz 0.05%+1 kHz
Frequency Measurement Sensitivity (sine wave)
Frequency Minimum Signal Maximum Signal
15 Hz - 200 Hz 100 mV rms 30V rms
200 Hz - 70 kHz 100 mV rms 30V rms
70 kHz - 100 kHz 100 mV rms 20V rms
100 kHz - 200 kHz 150 mV rms 10V rms
200 kHz - 300 kHz 150 mV rms 7V rms
300 kHz - 1 MHz linearly increasing from linearly decreasing from
150 mV rms at 300 kHz to 7V rms at 300 kHz to
2V rms at 1 MHz
2V rms at 1 M