Agilent Technologies 34970A Service Guide

Gain Verification
This procedure is used to check the “full scale” reading accuracy of
the internal DMM. Verification checks are performed only for those
functions and ranges with unique gain calibration constants.
Begin verification by selecting a measuring function and range.
Make sure you have read “Test Considerations” on page 71.
DC VOLTS, Resistance, and DC CURRENT Gain Verification Test
1 Make sure you have read “Test Considerations” on page 71.
2 Select each function and range in the order shown 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).
3 Compare measurement results to the appropriate test limits shown
in the table. (Be certain to allow for appropriate source settling.)
Input
Channel 210
Function
[1]
Range
Quick
Check
Error from Nominal
24 hour 90 day 1 year
100 mV
1 V
10 V
100 V
300 V
DC Volts 100 mV
1 V
10 V
100 V
300 V
Q
Q
± 6.5 µV
± 26 µV
± 190 µV
± 2.6 mV
± 12 mV
± 8 µV
± 37 µV
± 250 µV
± 4.1 mV
±
19.5 mV
± 9 µV
± 47 µV
± 400 µV
± 5.1 mV
± 22.5 mV
100
Ω
1 kΩ
10 kΩ
100 kΩ
1 M
Ω
10 M
Ω
100 M
Ω
[3]
2-Wire Ohms
[2]
and
4-Wire Ohms
100
Ω
1 k
Ω
10 k
Ω
100 kΩ
1 MΩ
10 MΩ
100 MΩ
Q
Q
± 6.5 mΩ
±
26 mΩ
±
250 mΩ
±
2.5 Ω
±
30 Ω
±
1.6 kΩ
±
310 kΩ
±
12 mΩ
±
90 mΩ
±
900 mΩ
±
9 Ω
±
90 Ω
±
2.1 kΩ
±
801 kΩ
±
14 mΩ
±
110 mΩ
±
1.1 Ω
±
11 Ω
±
110 Ω
±
4.1 kΩ
±
810 kΩ
Input
Channel 221
Function
[1]
Range
Quick
Check
Error from Nominal
24 hour 90 day 1 year
10 mA
100 mA
1 A
DC Current 10 mA
100 mA
1 A
Q
± 1.5 µA
± 14 µA
± 560 µA
± 5 µA
± 35 µA
± 900 µA
± 7 µA
± 55 µA
± 1.1 mA
[1] Select 6
1
⁄
2
digit resolution.
[2] The 2-wire ohms resistance verification test is optional (see note on Page 82). For 2-wire
ohms, an additional 1
Ω of error must be added (see Page 71). Add a 1-second channel delay
when using Fluke 5700 in 2-wire compensated mode. This avoids response time issues with
2-wire compensation when 34970A’s current source contains a pulse.
[3] Verify only, no adjustment required.
Q: Quick performance verification test points.
4
Chapter 4 Calibration Procedures
Internal DMM Verification Tests
77

Agilent Technologies 34970A Specifications

General

Brand	Agilent Technologies
Model	34970A
Category	Switch
Language	English