Frequency - Fluke 8845A User Manual

8845A/8846A
Users Manual
8845A Accuracy
Accuracy is given as ± (% measurement + % of range)
Range
10 mA
100 mA
[3]
400 mA
[2]
1 A
[1][2]
3 A
[2]
10 A
[1] Part of the 10 A range
[2] Available only at front panel connectors
[3] 400 mA available in software version 1.0.700.18 or greater only. 400 mA continuously; 550 mA for 2 minutes on,
1 minute off; maximum crest factor 3:1 at 400 mA; specification for current above 329 mA is typical.
Additional Low Frequency Errors
Error is stated as % of reading.

Frequency

10 – 20 Hz
20 – 40 Hz
40 – 100 Hz
100 – 200 Hz
200 Hz – 1 kHz
> 1 kHz

Frequency

Gate Times ............................................................. Programmable to 1 s, 100 ms, and 10 ms
Measurement Method ............................................. Flexible counting technique. AC-coupled input using the ac voltage
Settling Considerations ........................................... When measuring frequency or period after a dc offset voltage change,
Measurement Considerations ................................. To minimize measurement errors, shield inputs from external noise
1-20
24 Hour
Frequency
(23 ±1 °C)
(Hz)
3 – 5 Hz 1.1 + 0.06
5 – 10 Hz 0.35 + 0.06
10 Hz – 5 kHz 0.15 + 0.06
5 – 10 kHz 0.35 + 0.7
3 – 5 Hz 1.0 + 0.04
5 – 10 Hz 0.3 + 0.04
10 Hz – 5 kHz 0.1 + 0.04
5 – 10 kHz 0.2 + 0.25
3 – 5 Hz 1.0 + 0.1
5 – 10 Hz 0.3 + 0.1
10 Hz – 1 kHz 0.1 + 0.1
1kHz – 10 kHz 0.2 + 0.7
3 – 5 Hz 1.0 + 0.04
5 – 10 Hz 0.3 + 0.04
10 Hz – 5 kHz 0.1 + 0.04
5 – 10 kHz 0.35 + 0.7
3 – 5 Hz 1.1 + 0.06
5 – 10 Hz 0.35 + 0.06
10 Hz – 5 kHz 0.15 + 0.06
5 – 10 kHz 0.35 + 0.7
3 – 5 Hz 1.1 + 0.06
5 – 10 Hz 0.35 + 0.06
10 Hz – 5 kHz 0.15 + 0.06
5 – 10 kHz 0.35 + 0.7
3HZ (slow) 20HZ (medium)
0
0
0
0
0
0
90 Days
(23 ±5 °C)
1.1 + 0.06 1.1 + 0.06
0.35 + 0.06 0.35 + 0.06
0.15 + 0.06 0.15+ 0.06
0.35 + 0.7 0.35 + 0.7
1.0 + 0.04 1.0 + 0.04
0.3 + 0.04 0.3 + 0.04
0.1 + 0.04 0.1 + 0.04
0.2 + 0.25 0.2 + 0.25
1.0 + 0.1 1.0 + 0.1
0.3 + 0.1 0.3 + 0.1
0.1 + 0.1 0.1 + 0.1
0.2 + 0.7 0.2 + 0.7
1.0 + 0.04 1.0 + 0.04
0.3 + 0.04 0.3 + 0.04
0.1 + 0.04 0.1 + 0.04
0.35 + 0.7 0.35 + 0.7
1.1 + 0.06 1.1 + 0.06
0.35 + 0.06 0.35 + 0.06
0.15 + 0.06 0.15 + 0.06
0.35 + 0.7 0.35 + 0.7
1.1 + 0.06 1.1 + 0.06
0.35 + 0.06 0.35 + 0.06
0.15 + 0.06 0.15 + 0.06
0.35 + 0.7 0.35 + 0.7
AC Filter
200HZ (fast)
0.25 –
0.02 –
0.01 0.55
0 0.2
0 0.02
0 0
measurement function.
errors may occur. For the most accurate measurement, wait up to
1 second for the input blocking capacitor to settle.
when measuring low-voltage, low-frequency signals.
Temperature
1 Year
Coefficient/ °C
(23 ±5 °C)
Outside 18 to 28 °C
0.2 + 0.006
0.1 + 0.006
0.015 + 0.006
0.03 + 0.006
0.1 + 0.006
0.035 + 0.006
0.015 + 0.006
0.03 + 0.006
0.1 + 0.006
0.035 + 0.006
0.015 + 0.006
0.03 + 0.006
0.1 + 0.006
0.035 + 0.006
0.015 + 0.006
0.03 + 0.006
0.1 + 0.006
0.035 + 0.006
0.015 + 0.006
0.03 + 0.006
0.2 + 0.006
0.035 + 0.006
0.015 + 0.006
0.03 + 0.006