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

Product Overview and Specifications
Measurement Specifications 1
1-17
DC Current Accuracy
Accuracy is given as ± (% measurement + % of range).
Range
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 µA
0.005 % + 0.003 % 0.015 % + 0.0035 % 0.015 % + 0.0035 % 0.002 % + 0.001 %
1 mA 0.005 % + 0.001 % 0.015 % + 0.0011 % 0.015 % + 0.0011 % 0.002 % + 0.001 %
10 mA 0.005 % + 0.003 % 0.015 % + 0.0035 % 0.015 % + 0.0035 % 0.002 % + 0.001 %
100 mA 0.005 % + 0.001 % 0.015 % + 0.0035 % 0.015 % + 0.0035 % 0.002 % + 0.001 %
DC Current Additional Errors
Digits NPLC
Additional NPLC Noise Error
for 10 mA, 100 mA
Additional NPLC Noise
Error for 100 µA, 1 mA
6 ½ 200 - -
6 ½ 100 - -
6 ½ 10 (Slow) - -
5 ½ 1 (Medium) 0.0008 % of range 0.0008 % of range
4 ½ 0.2 (Fast) 0.002 % of range + 1.2 µA 0.002 % of range + 12 nA
4 ½ 0.02 0.014 % of range + 1.7 µA 0.014 % of range + 17 nA
AC Current
Input Protection .................................................... 0.15 A / 600 V resettable PTC
Measurement Method ........................................... AC-coupled true-rms, dc-coupled to the shunt (no blocking capacitor).
AC Filter Bandwidth:
Slow .................................................................... 20 Hz
Fast ..................................................................... 200 Hz
Maximum Crest Factor ......................................... 5:1 at full scale
Additional Crest Factor Errors ............................ Crest factor 1-2, 0.05 % of full scale
Crest factor 2-3, 0.2 % of full scale
Crest factor 3-4, 0.4 % of full scale
Crest factor 4-5, 0.5 % of full scale
AC Current Input Characteristics
Range Resolution
Resolution
Reference
Resistance
Burden
Voltage
4 ½
Digits
5 ½
Digits
6 ½
Digits
100 µA
100.0000 µA 10 nA 1 nA 0.1 nA
1 kΩ
<10 mV (RMS)
1 mA 1.000000 mA 100 nA 10 nA 1 nA
1 kΩ
<10 mV (RMS)
10 mA 10.00000 mA
1 µA
100 nA 10 nA
10 Ω
<20 mV (RMS)
100 mA 100.0000 mA
10 µA 1 µA
100 nA
10 Ω
<50 mV (RMS)
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