Internal Dmm Specifications And Characteristics - Agilent Technologies 34980A Service Manual

Internal DMM Specifications and Characteristics

Function Range
DC voltage 
100.0000 mV
(with 34921A/ 1.000000 V
[6]
22A/25A/31A/32A) 10.00000 V
100.0000 V 
Input impedance = Hi-Z
10 V range and below 300.0000 V
[5]
100.0000 
Resistance
1.000000 k
10.00000 k
100.0000 k
1.000000
M
10.00000
M
100.0000
M
DC current (34921 10.00000 mA
only) 100.0000 mA
1.000000 A
[1]
One hour warm-up and a fixed configuration with slow AC filter, sine wave input, and 6½ digits. 
Temperature within ±5 °C of temperature at calibration (Tcal between 18-28 °C).
[2]
90 minute warm-up and a fixed configuration and 6½ digits. Temperature within ±1 °C of temperature at calibration (Tcal between
18-28 °C).
[3]
Relative to calibration standards
[4]
20% over range on all ranges except 300VDC and AC ranges and 1 ADC and AC current ranges
[5]
Accuracy for 4-wire ohms or 2-wire ohms with scaling to remove offset; add 4  additional error plus the lead wire resistance to the
2-wire ohms function without scaling. The 34921A and 34922A may have increased relay channel resistance, up to an additional 
50  which can occur on modules that have been out of service or following relay inactivity for periods of greater than 1 week. Using
4-wire measurements or switching relays for 2k cycles prior to use typically corrects this problem.
[6] 
Add 50 V error for 34923/24/33.
34980A Service Guide
DC and Resistance Specifications
DMM accuracy ± (% of reading + % of range). Includes measurement error, switching error
and transducer conversion error.
[4]
Test Current or 
Burden Voltage
1mA
1mA
100 A
10 A
5.0A
500nA
500nA/10M
< 0.1 V burden
< 0.6V 
< 2V
[2,3]
24 hour 90 days
°
Tcal ± 1 C Tcal ± 5
0.0030 + 0.0040 +
0.0035 0.0040
0.0020 + 0.0030 +
0.0006 0.0007
0.0015 + 0.0020 +
0.0004 0.0005
0.0030 + 0.0045 +
0.0006 0.0006
0.0030 + 0.0045 +
0.0020 0.0030
0.008 + 0.004 
0.0030 +
0.0035 0.008 + 0.001
0.0020 + 0.008 + 0.001
0.0006 0.008 + 0.001
0.0020 + 0.008 + 0.001
0.0005 0.020 + 0.001
0.0020 + 0.800 + 0.010
0.0005
0.002 + 0.001
0.015 + 0.001
0.300 + 0.010
0.005 + 0.010 
0.030 + 0.020
0.030 + 0.005 
0.010 + 0.004
0.050 + 0.006 0.080 + 0.010
Specifications
1 year 
Temperature
° °
C Tcal ± 1 C coefficient
Tcal ± 5
0.0050 + 0.0005 +
0.0040 0.0005
0.0040 + 0.0005 +
0.0007
0.0001
0.0035 + 0.0005 +
0.0005 0.0001
0.0055 + 0.0005 +
0.0006 0.0001
0.0055 + 0.0005 +
0.0030 0.0003
0.010 + 0.004 0.0006 +
0.010 + 0.001 0.0005
0.010 + 0.001 0.0006 +
0.010 + 0.001 0.0001
0.010 + 0.001 0.0006 +
0.040 + 0.001
0.0001
0.800 + 0.010 0.0006 +
0.0001
0.0010 +
0.0002
0.0030 +
0.0004
0.1500 +
0.0002
0.050 + 0.020 0.002 + 0.0020
0.050 + 0.005 0.002 + 0.0005
0.100 + 0.010 0.005 + 0.0010
2
[1]
,
°
C
27