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T .O . 33K8-4-551-1
DIGITAL VOLTMETER
3458A
(HEWLETT-PACKARD)
I CALIBRATION DESCRIPTION :
Table I.
Test Instrument (TI)
Performance
Test
Characteristics
Specifications
Method
NOTE
The Performance Specifications listed below for the TI show Relative specifications as found in
the commercial data and Absolute specifications . The absolute specifications were calculated by
combining the uncertainty of the relative specifications found in the commercial data with the
uncertainty of the calibration standards listed in Section 2, Equipment Requirements.
DC Voltage
Range : 0 to 1000 VDC
Compared to a DC
Reference Standard
Accuracy:
and DC Reference
Relative : ±(ppm of rdg + ppm of mg)
Divider or DC Voltage
Absolute : ±[Sgrt(TI ppm of rdg^2 +
Divider
STD 1 ppm of rdg^2 + STD2 ppm of rdg^2)
+ TI ppm of rng]
Standard
Range
Relative
Absolute
100mV
9+10
(9+1 .5+0 .5)+10
lV
8+1
(8+1 .5+0 .2)+1
10V
8+0 .2
(8+1 .5)+0 .2
100V
10+ 0 .3
(10+1 .5+0 .2)+0 .3
1000 V
10+0 .1
(10+ 1 .5+0 .5)+0 .1
Inputs >100 VDC, add
12 ppm X (Vin/1000)2
Opt 002
Range
Relative
Absolute
100mV
5+10
(5+1 .5+0 .5)+10
1V
4+1
(4+1 .5+0 .2)+1
IOV
4+0 .2
(4+1 .5)+0 .2
1
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