Agilent 34970A/34972A Data Acquisition / Switch Unit

Chapter 4 Calibration Procedures
Internal DMM Verification Tests
...Continued from previous page
3 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 84).
Input
Open
Open
Open
Input
Short
Short
Short
Short
Short
Short
Short
Short
Short
Short
Short
Short
Channel 221
Quick
Error from Nominal
Function [1] Range Check 24 hour 90 day 1 year
DC Current 10 mA
± 1 A ± 2 A ± 2 A
100 mA
Q ± 4 ± 5 ± 5
1A
± 60 A ± 100 A ± 100 A
Channel 209
Quick
Error from Nominal
Function [1] Range Check 24 hour 90 day 1 year
DC Volts
2-Wire Ohms [2]
and
4-Wire Ohms
100 mV
1V
10V
100V
300V
100
1 k
10 k
100 k
1 M
10 M
100 M
Q
Q
± 3.5 V
± 6 V
± 40 V
± 600 V
± 6 mV
± 3.5 m
± 6 m
± 50 m
± 500 m
± 10
± 100
± 10 k
± 4 V
± 7 V
± 50 V
± 600 V
± 9 mV
± 4 m
± 10 m
± 100 m
± 1
± 10
± 100
± 10 k
± 4 V
± 7 V
± 50 V
± 600 V
± 9 mV
± 4 m
± 10 m
± 100 m
± 1
± 10
± 100
± 10 k
[1] Select 6½ digit resolution.
[2] for 2-wire ohms, an additional 4 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.
86