Keysight 34401A, Service Manual

Page: 75 / 165

Caution
Zero offset calibration using a multifunction calibrator is
NOT
recommended. The calibrator and cabling offset can be large and unstable
causing poor offset calibration of the Agilent 34401A or any multimeter.
Note
These offset tests should be verified for both the front and the rear
input terminals.
Input
(Front/Rear)
Function
Quick
Check 34401A
Range
Error From Nominal
24 hour 90 day 1 year
Open
Open
Open
Open
Short
Short
Short
Short
Short
Short
Short
Short
Short
Short
Short
Short
DC Current
DC Volts
2-Wire
Ohms[1]
and
4-Wire
Ohms
Q
Q
Q
10 mA
100 mA
1 A
3 A
100 mV
1 V
10 V
100 V
1000 V
100
Ω
1 k
Ω
10 k Ω
100 k Ω
1 M Ω
10 M
Ω
100 M Ω
±
1
µ
A
± 4 µ A
±
60
µ
A
± 600 µ A
±
3
µ
V
±
6
µ
V
±
40
µ
V
± 600 µ V
±
6 mV
±
3 m
Ω
±
5 m
Ω
± 50 m Ω
± 500 m Ω
± 10 Ω
±
100
Ω
± 10 k Ω
±
2
µ
A
± 5 µ A
±
100
µ
A
± 600 µ A
±
3.5
µ
V
±
7
µ
V
±
50
µ
V
± 600 µ V
±
10 mV
±
4 m
Ω
±
10 m
Ω
± 100 m Ω
± 1 Ω
± 10 Ω
±
100
Ω
± 10 k Ω
±
2
µ
A
± 5 µ A
±
100
µ
A
± 600 µ A
±
3.5
µ
V
±
7
µ
V
±
50
µ
V
± 600 µ V
±
10 mV
±
4 m
Ω
±
10 m
Ω
± 100 m Ω
± 1 Ω
± 10 Ω
±
100
Ω
±
10 k
Ω
[1] For 2-wire ohms, these errors assume you are using Math Null. Without Math Null,
an additional 200 m
Ω
of error must be added.
Q
: Quick performance verification test points.
Chapter 4 Calibration Procedures
Zero Offset Verification
68