Specifications

Low Power Resistance
3
– 7
1
/
2
digits Resolution all Ranges
Range Test 24-Hour 90-Day 1-Year
Current 23°C ± 1°C 23°C ± 5°C 23°C ± 5°C
167
General Specifications
Front-Panel Connection: Shielded,
low-thermal, copper contacts
Interface: GPIB and RS-232 standard
Languages: SCPI-1994 (IEEE-488.2),
Keithley 181
Ordering Information
34420A Nanovolt/Micro-Ohm Meter
Includes low-thermal input cable
(34102A), low-thermal shorting plug
(34103A), operating and service manuals,
quick reference guide, test report with
calibration sticker, 2.3 ml bottle of
contact cleaner, and power cord.
34420A-1CM Rackmount Kit
34420A-A6J ANSI Z540
Compliant Calibration
Accessories
34102A Low-Thermal Input Cable (four-
conductor with copper spade lugs)
34103A Low-Thermal Shorting Plug
34104A Low-Thermal Input Connector
34161A Accessory Pouch
34131A Hard Transit Case
Nanovolt/Micro-ohm Meter 34420A (Continued)
More detailed specifications at www.agilent.com/find/34420A
Digital Multimeters
Abbreviated Technical Specifications
Accuracy Specifications:
± (% of reading + % of range)
1 Ω 10 mA 0.0015 + 0.0002 0.0050 + 0.0002 0.0070 + 0.0002
10 Ω 10 mA 0.0015 + 0.0002 0.0040 + 0.0002 0.0060 + 0.0002
100 Ω 1 mA 0.0015 + 0.0002 0.0040 + 0.0002 0.0060 + 0.0002
1 kΩ 100 µA 0.0015 + 0.0002 0.0040 + 0.0002 0.0060 + 0.0002
10 kΩ 10 µA 0.0015 + 0.0004 0.0040 + 0.0004 0.0060 + 0.0004
100 kΩ 5 µA 0.0015 + 0.0012 0.0040 + 0.0015 0.0060 + 0.0015
1 MΩ 5 µA 0.0020 + 0.0003 0.0050 + 0.0004 0.0070 + 0.0004
10 Ω 1 mA 0.0020 + 0.0002 0.0050 + 0.0002 0.0070 + 0.0002
100 Ω 100 µA 0.0025 + 0.0002 0.0040 + 0.0002 0.0070 + 0.0002
SPRT
4
SPRT probe accuracy +0.003°C
RTD RTD probe accuracy +0.05°C
Thermistor Thermistor probe accuracy +0.1°C
Thermocouple
5
Thermocouple probe accuracy +0.2°C
1
Specifications are for channel 1 or channel 2 (100 V range on channel 1 only), after 2-hour warm-up, resolution at 7.5 digits
(100 NPLC), with filters off.
2
After a 2-hour warm-up ±1ºC, 6.5 digits (10 NPLC) with analog filter off digital filter medium (50 readings). 2 minute rms and
24-hour noise typical.
3
All resistance specifications are for channel 1 only, after 2-hour warm-up, resolution at 7.5 digits (100 NPLC) with filters off,
for 4-wire Ω or 2-wire Ω using Null.
4
For 25 ΩSPRT with triple-point of water check within last 4 hours. With no triple-point of water check, add 0.013ºC for 24-hour,
0.035ºC for 90-day, and 0.055ºC for 1-year specifications.
5
For fixed reference junction. Add 0.3ºC for external reference junction, add 2.0ºC for internal reference junction.
Voltage Limited Resistance
3
: Voltage limit selectable: 20 mV, 100 mV, or 500 mV
Range Test 24-Hour 90-Day 1-Year
Current 23°C ± 1°C 23°C ± 5°C 23°C ± 5°C
Temperature: 0.001°C Resolution
Probe Type Accuracy