Additional Errors - Agilent Technologies 3458A Calibration Manual

1 / DC Voltage
DC Voltage
Range Full Scale
100 mV 120.00000
1 V 1.20000000
10 V 12.0000000
100 V 120.000000
1000 V 1050.00000
3
Accuracy (ppm of Reading (ppm of Reading for Option 002) + ppm of Range)
Range
4
24 Hour
100 mV 2.5 + 3
1 V 1.5 + 0.3
10 V 0.5 + 0.05
100 V 2.5 + 0.3
2.5 + 0.1
6
1000 V
Transfer Accuracy/Linearity
10 Min, Tref ± 0.5ºC
Range
(ppm of Reading + ppm of
Range)
100 mV 0.5 + 0.5
1 V 0.3 + 0.1
10 V 0.05 + 0.05
100 V 0.5 + 0.1
1000 V 1.5+0.05
Settling Characteristics
For first reading or range change error, add 0.0001% of input voltage step additional error.
Reading settling times are affected by source impedance and cable dielectric absorption characteristics.

Additional Errors

82 Appendix A Specifications
Maximum Input Impedance Temperature Coefficient (ppm of
Resolution
10 nV >10 GW
10 nV >10 GW
100 nV >10 GW
1 µV 10 MW ± 1%
10 µV 10 MW ± 1%
5
90 Day
5.0 (3.5)+ 3
4.6 (3.1)+0.3
4.1 (2.6) + 0.05
6.0 (4.5) + 0.3
6.0 (4.5)+ 0.1
Conditions
Following 4 hour warm-up. Full scale to 10% of full scale
•
Measurements on the 1000 V range are within 5% of the
•
initial meausurement value and following measurement
setting.
Tref is the starting ambient temperature.
•
Measurements are made on a fixed range (>4 min.) using
•
accepted metrology practices
Noise Rejection (dB)
NPLC<1
NPLC>1
NPLC > 10
NPLC > 100
NPLC = 1000
*RMS Noise
Range
0.1V
1 V
10 V
100 V
1000 V
Reading + ppm of Range) /º C
Without ACAL¹ With ACAL²
1.2 + 1 0.15 + 1
1.2 + 0.1 0.15 + 0.1
0.5 + 0.01 0.15 + 0.01
2 + 0.4 0.15 + 0.1
2 + 0.04 0.15 + 0.01
5
1 Year 2 Year
9 (5)+ 3 14 (10)+ 3
8 (4)+ 0.3 14 (10)+0.3
8 (4) + 0.05 14 (10)+0.05
10 (6)+0.3 14 (10)+ 0.3
10 (6)+ 0.1 14 (10)+ 0.1
7
8
AC NMR AC ECMR
0 90
60 150
60 150
60 160
75 170
For RMS noise error,
Multiplier
multiply RMS noise
x20
result from graph by
x2
multiplier in chart. For
x1
peak noise error. multiply
x2
RMS noise error by 3.
x1
1. Additional error from Tcal
or last ACAL ± 1 º C.
2. Additional error from Tcal
±5º C
3. Specifications are for
PRESET, NPLC 100.
4. For fixed range (> 4 min.),
MATH NULL and Tcal
±1ºC.
5. Specifications for 90 day, 1
year and 2 year are within 24
hours and ±1º C of last
ACAL; Tcal ±5ºC, MATH
NULL and fixed range.
ppm of Reading
5
specifications for High
Stability (Option 002) are in
parentheses.
Without MATH NULL, add
0.15 ppm of Range to 10 V,
0.7 ppm of Range to 1 V,
and 7 ppm of Range to 0.1
V. Without math null and for
fixed range less than 4
minutes, add 0.25 ppm of
Range to 10 V, 1.7 ppm of
Range to 1 V and 17 ppm of
Range to 0.1 V.
Add 2 ppm of reading
additional error for Agilent
factory traceability to US
NIST. Traceability error is
the absolute error relative to
National Standards
associated with the source of
last external calibration.
6. Add 12 ppm X (Vin/1000)
additional error for inputs >
100 V.
DC
ECMR
140
7. Applies for 1 kW
140 unbalance in the LO lead
140
and ± 0.1% of the line
140
frequency currently set
140
for LFREQ.
8. For line frequency ± 1%,
ACNMR is 40 dB for
NPLC ³ 1, or 55 dB for
NPLC ³ 100. For line
frequency ± 5%, ACNMR
is 30 dB for NPLC ³ 100.
2