Agilent Technologies 3458A Calibration Manual page 84

2
1
Accuracy (ppm of Reading + ppm of Range)
Range
24 Hour
10 W
5+3
100 W
3+3
1 kW 2+0.2
10 kW 2+0.2
100 kW 2+0.2
1 MW 10+1
10 MW 50+5
100 MW 500+10
1 GW 0.5%+10
Two-Wire Ohms Accuracy
For Two-Wire Ohms ( OHM ) accuracy, add the following offset errors to the Four-Wire Ohms ( OHMF )
accuracy. 24 Hour: 50 mW. 90 Day: 150 mW. 1 Year: 250 mW. 2 Year: 500 mW
Additional Errors
*RMS Noise
Range Multiplier
10 W & 100 W
×10
1k W to 100 kW ×1
1 MW ×1.5
10 MW ×2
100 MW ×120
1 GW ×1200
Settling Characteristics
For first reading error following range change, add the
total 90 day measurement error for the current range.
Preprogrammed settling delay times are for < 200 pF
external circuit capacitance.
84 Appendix A Specifications
2 3
90 Day
15+5
10+5
8+0.5
8+0.5
8+0.5
12+2
50+10
500+10
0.5%+10
Selected Reading Rates
NPLC
0.0001
0.0006
0.01
0.1
1
10
100
Measurement Consideration
Agilent recommends the use of PTFE cable or
other high impedance, low dielectric absorption
cable for these measurements.
Maximum Input
For RMS noise error,
HI to LO
multiply RMS noise
HI & LO Sense to LO ± 200 V pk ± 350 V pk
result from graph by
LO to Guard
multiplier in chart. For
Guard to Earth
peak noise error, multiply
RMS noise error by 3.
Temperature Coefficient (Auto-Zero
off)
For a stable environment ± 1°C add the following
error for AZERO OFF. (ppm of Range) /°C
Range
10 W
100 W
1 kW
10 kW
100 kW 1
3
1 Year 2 Year
15+5 20+10
12+5 20+10
10+0.5 15+1
10+0.5 15+1
10+0.5 15+1
15+2 20+4
50+10 75+10
500+10 0.1%+10
0.5%+10 1%+10
4
Readings/Sec
Auto-Zero
5
Aperture Digits Off
1.4 µs 4.5
100,000
10 µs 5.5 50,000
6
167 µs 6.5 5,300
6
1.66 ms 6.5 592
6
16.6 ms 7.5 60
6
0.166 s 7.5 6
7.5 36 /min
Rated
Input
± 1000 V pk ± 1000 V pk
± 200 V pk ± 350 V pk
± 500 V pk ± 1000 V pk
Error Range Error
50 1 MW 1
50 10 MW 1
5 100 MW 10
5 1 GW 100
3
1. Specifications are for PRESET;
NPLC 100; OCOMP ON; OHMF.
2. Tcal ± 1°C.
3. Specifications for 90 day, 1 year,
and 2 year are within 24 hours and
± 1°C of last ACAL; Tcal ±5°C.
Add 3 ppm of reading additional
error for Agilent factory
traceability of 10 KW to US NIST.
Traceability is the absolute error
relative to National Standards
associated wifh the source of last
external calibration.
4. For PRESET; DELAY 0; DISP
Auto-Zero
OFF; OFORMAT DINT;
On
ARANGE OFF.
4,130
7
For OHMF or OCOMP ON, the
maximum reading rates will be
3,150
slower.
930
5. Ohms measurements at rates <
245
NPLC 1 are subject to potential
29.4
noise pickup. Care must be taken
to provide adequate shielding and
3
guarding to maintain measurement
18/min
accuracies.
6. Aperture is selected independent
of line frequency (LFREQ). These
apertures are for 60 Hz NPLC
values where
1 NPLC=1/ LFREQ. For 50 Hz
and NPLC indicated, aperture will
increase by 1.2 and reading rates
Non-
will decrease by 0.833.
Destructive
7. For OFORMAT SINT