2640A Frequency Measurement Specifications - Fluke 2640A Service Manual

Table 1-25. 2640A Thermocouple Specifications (cont)
Thermocouple
Temperature °C
Type
R 250 to 600
600 to 1500
1500 to 1767
S 250 to 1000
1000 to 1400
1400 to 1767
B 600 to 900
900 to 1200
1200 to 1820
C 0 to 150
150 to 650
650 to 1000
1000 to 1800
1800 to 2316

2640A Frequency Measurement Specifications

Tables 1-26 to 1-27 provide 2640A specifications for the frequency measurement
function.
Table 1-26. 2640A Frequency Accuracy Specifications
Range
15 Hz to 900 Hz 0.01 Hz
900 Hz to 9 kHz 0.1 Hz
9 kHz to 90 kHz 1 Hz
90 kHz to 900 kHz 10 Hz
1 MHz 100 Hz
Resolution 18°C to 28°C
90 Day
Slow
0.1 0.90
0.1 0.80
0.1 0.85
0.1 0.95
0.1 0.80
0.1 1.00
0.2 1.20
0.2 0.90
0.1 0.75
0.2 0.80
0.1 0.65
.05 0.65
.05 1.00
.05 1.60
Frequency Measurement Accuracy, 1 Year, -10°C to 60°C
Resolution
Slow Fast
0.1 Hz
1 Hz
10 Hz
100 Hz
1 kHz
Introduction and Specification
Accuracy + °C
1 Year
Slow Fast Slow
1.00 2.10 1.20
0.90 1.80 1.30
0.85 1.90 1.70
1.10 2.30 1.30
1.00 1.90 1.40
1.30 2.20 1.80
1.40 3.10 1.50
1.00 2.20 1.20
1.00 1.90 1.30
0.90 1.60 1.00
0.75 1.40 1.00
0.85 1.40 1.20
1.30 2.10 2.10
2.10 3.20 3.40
Accuracy + (% input + Hz)
Slow
0.05%+0.02 Hz 0.05%+0.2 Hz
0.05%+0.1 Hz 0.05%+1 Hz
0.05%+1 Hz 0.05%+10 Hz
0.05%+10 Hz 0.05%+100 Hz
0.05%+100 Hz 0.05%+1 kHz
Specifications
-10°C to 60°C
1 Year
Fast
2.20
2.00
2.50
2.40
2.30
2.80
3.20
2.40
2.20
1.70
1.50
1.80
2.80
4.60
1-28.
Fast
1
1-19