Agilent Technologies 34970A, Руководство по обслуживанию, Страница: 78 / 273

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1
Select each function and range in the order shown in the table below.
Before executing each test, you must press
to enable reading
monitoring on the selected channel (or use the
ROUTe:MON
command
from the remote interface). Compare measurement results to the
appropriate test limits shown in the table ( see page 74) .
Input
Channel 221
Function
[1]
Range
Quick
Check
Error from Nominal
24 hour 90 day 1 year
Open
Open
Open DC Current 10 mA
100 mA
1 A
Q
±
1
µ
A
±
4
µ
A
±
60
µ
A
± 2
µ
A
±
5
µ
A
±
100
µ
A
±
2
µ
A
±
5
µ
A
±
100
µ
A
Input
Channel 209
Function
[1]
Range
Quick
Check
Error from Nominal
24 hour 90 day 1 year
Short
Short
Short
Short
Short DC Volts 100 mV
1 V
10 V
100 V
300 V
Q
± 3.5
µ
V
±
6
µ
V
±
40
µ
V
±
600
µ
V
±
6 mV
±
4
µ
V
±
7
µ
V
±
50
µ
V
±
600
µ
V
±
9 mV
±
4
µ
V
±
7
µ
V
±
50
µ
V
±
600
µ
V
±
9 mV
Short
Short
Short
Short
Short
Short
Short 2-Wire Ohms
[2]
and
4-Wire Ohms
100
Ω
1 k
Ω
10 k
Ω
100 k
Ω
1 M
Ω
10 M
Ω
100 M
Ω
Q
±
3.5 m
Ω
±
6 m
Ω
±
50 m
Ω
±
500 m
Ω
±
10
Ω
±
100
Ω
±
10 k
Ω
±
4 m
Ω
±
10 m
Ω
±
100 m
Ω
±
1
Ω
±
10
Ω
±
100
Ω
±
10 k
Ω
±
4 m
Ω
±
10 m
Ω
±
100 m
Ω
±
1
Ω
±
10
Ω
±
100
Ω
±
10 k
Ω
[1] Select 6
1
⁄
2
digit resolution.
[2] For 2-wire ohms, an additional 4
Ω
of error must be added.
Q
: Quick performance verification test points.
Note:
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 internal DMM.
Chapter 4 Calibration Procedures
Internal DMM Verification Tests
76