Fluke 2638A - AC Voltage Accuracy; Additional Low Frequency Errors; DC Current; DC Current Input Characteristics

2638A
Users Manual
1-16
AC Voltage Accuracy
Accuracy is given as ± (% measurement + % of range).
Range Frequency
24 Hour
(23 ±1 °C)
90 Days
(23 ±5 °C)
1 Year
(23 ±5 °C)
T.C./ °C
Outside
18 °C to 28 °C
100 mV
20 Hz to 20 kHz 0.1 % + 0.05 % 0.11 % + 0.05 % 0.11 % + 0.05 % 0.01 % + 0.005 %
20 kHz to 50 kHz 0.2 % + 0.05 % 0.22 % + 0.05 % 0.22 % + 0.05 % 0.01 % + 0.005 %
50 kHz to 100 kHz 0.55 % + 0.08 % 0.6 % + 0.08 % 0.6 % + 0.08 % 0.05 % + 0.01 %
1 V
20 Hz to 20 kHz 0.1 % + 0.05 % 0.11 % + 0.05 % 0.11 % + 0.05 % 0.01 % + 0.005 %
20 kHz to 50 kHz 0.2 % + 0.05 % 0.22 % + 0.05 % 0.22 % + 0.05 % 0.01 % + 0.005 %
50 kHz to 100 kHz 0.55 % + 0.08 % 0.6 % + 0.08 % 0.6 % + 0.08 % 0.05 % + 0.01 %
10 V
20 Hz to 20 kHz 0.1 % + 0.05 % 0.11 % + 0.05 % 0.11 % + 0.05 % 0.01 % + 0.005 %
20 kHz to 50 kHz 0.2 % + 0.05 % 0.22 % + 0.05 % 0.22 % + 0.05 % 0.01 % + 0.005 %
50 kHz to 100 kHz 0.55 % + 0.08 % 0.6 % + 0.08 % 0.6 % + 0.08 % 0.05 % + 0.01 %
100 V
20 Hz to 20 kHz 0.1 % + 0.05 % 0.11 % + 0.05 % 0.11 % + 0.05 % 0.01 % + 0.005 %
20 kHz to 50 kHz 0.2 % + 0.05 % 0.22 % + 0.05 % 0.22 % + 0.05 % 0.01 % + 0.005 %
50 kHz to 100 kHz 0.55 % + 0.08 % 0.6 % + 0.08 % 0.6 % + 0.08 % 0.05 % + 0.01 %
300 V
20 Hz to 20 kHz 0.1 % + 0.05 % 0.11 % + 0.05 % 0.11 % + 0.05 % 0.01 % + 0.005 %
20 kHz to 50 kHz 0.2 % + 0.05 % 0.22 % + 0.05 % 0.22 % + 0.05 % 0.01 % + 0.005 %
50 kHz to 100 kHz 0.55 % + 0.27 % 0.6 % + 0.27 % 0.6 % + 0.27 % 0.05 % + 0.03 %
Note:
For conducted disturbances on mains input >1 V from 10 MHz to 40 MHz, add 0.02 % of range. For disturbances >3 V,
accuracy is unspecified.
Additional Low Frequency Errors
Error is stated as % of reading.
Frequency
AC Filte
r
20 Hz 200 Hz
20 Hz to 40 Hz 0 % −
40 Hz to 100 Hz
0 % 0.55 %
100 Hz to 200 Hz
0 %
0.2 %
200 Hz to 1 kHz
0 %
0.02 %
>1 kHz
0 %
0 %
DC Current
Input Protection .................................................... 0.15 A / 600 V Resettable PTC
DC Current Input Characteristics
Range Resolution
Resolution
Reference
Resistance
(Ohms)
Burden
Voltage
Fast
4½
Digits
Medium
5 ½
Digits
Slow
6 ½
Digits
100 µA
100.0000 µA 10 nA 1 nA 0.1 nA
1k Ω
<1 mV
1 mA 1.000000 mA 100 nA 10 nA 1 nA
1k Ω
<1 mV
10 mA 10.00000 mA
1 µA
100 nA 10 nA
10 Ω
<1 mV
100 mA 100.0000 mA
10 µA 1 µA
100 nA
10 Ω
<1 mV
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