Dc Voltage Accuracy; Dc Voltage Additional Errors; Ac Voltage - Fluke 2638A Calibration Manual

DC Voltage Accuracy

Accuracy is given as ± (% measurement + % of range).
24 Hour
Range
(23 ±1 °C)
100 mV 0.0025 % + 0.003 %
1 V 0.0018 % + 0.0006 %
10 V 0.0013 % + 0.0004 %
100 V 0.0018 % + 0.0006 %
300 V 0.0018 % + 0.002 %
Notes:
•
For conducted disturbances on mains input >1 V from 10 MHz to 20 MHz, add 0.02 % of range. For disturbances
>3 V, accuracy is unspecified.
•
For radiated disturbances >1V/m from 450 MHz to 550 MHz, add 0.02 % of range. For disturbances > 3 V/m,
accuracy is unspecified.

DC Voltage Additional Errors

Digits
6 ½
6 ½
6 ½
5 ½
4 ½
4 ½

AC Voltage

AC voltage specifications are for ac sine wave signals >5 % of range. For inputs from 1 % to 5 % of range and <50 kHz,
add an additional error of 0.1 % of range. For 50 kHz to 100 kHz, add 0.13 % of range.
Maximum Input ...................................................... 300 V rms or 425 V peak or 3 × 10
Measurement Method ........................................... AC-coupled true-rms. Measures the ac component of input with up to
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
90 Days
(23 ±5 °C)
0.0025 % + 0.0035 %
0.0018 % + 0.0007 %
0.0018 % + 0.0005 %
0.0027 % + 0.0006 %
0.0031 % + 0.002 %
NPLC Ch. x01 – x20
add 2 μV
200
add 2 μV
100
add 2 μV
10 (Slow)
add 2 μV
1 (Medium)
0.2 (Fast)
0.02
less) for any range.
300 V dc bias on any range.
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
HYDRA Series III Data Acquisition Unit
1 Year
(23 ±5 °C)
0.0037 % + 0.0035 % 0.0005 % + 0.0005 %
0.0025 % + 0.0007 % 0.0005 % + 0.0001 %
0.0024 % + 0.0005 % 0.0005 % + 0.0001 %
0.0038 % + 0.0006 % 0.0005 % + 0.0001 %
0.0041 % + 0.002 % 0.0005 % + 0.0003 %
Additional NPLC Noise
add 0.0008 % of range
add 0.002 % of range + 12 μV
-
add 0.014 % of range + 17 μV
-
7
volts-Hertz product (whichever is
Measurement Specifications
T.C./ °C
Outside
18 °C to 28 °C
Error
-
-
-
7