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Agilent 34420A NanoVolt/Micro-Ohm Meter
Data Sheet
* 7 1/2 digits resolution * 100pV, 100 n sensitivity * 1.3 nVrms, 8 nVpp noise performance * Built-in low noise 2 channel scanner * Direct SPRT, RTD, Thermistor, and Thermocouple measurements
Two Input Channels
An integral two-channel programmable scanner simplifies voltage comparisons. Built-in ratio and difference functions enable automated two channel measurements without the need for an external nanoVolt scanner. Both channels share the same low noise specifications to ensure accurate comparisons.
Unequaled Versatility
The 34420A gives you the versatility to tackle your most challenging tasks, both on the benchtop and in your automated system. Standard features include RS-232 and GPIB interfaces, SCPI and Keithley 181 programming language, 1024-reading memory, scaling and statistics, and a chart recorder analog output.
Nanovolt Performance at a Microvolt Price
The Agilent Technologies 34420A nanoVolt/micro-Ohm meter is a high-sensitivity multimeter optimized for performing low-level measurements. It combines low-noise voltage measurements with resistance and temperature functions, setting a new standard in low-level flexibility and performance.
Built-In Resistance and Temperature
The 34420A combines its low-noise nanoVolt input circuits with a high-stability current source to provide precise low-level resistance measurements - no more hassling with the cost and complexity of an external current source. Three resistance modes are included: * Standard * Low-power * Voltage-limited for dry-circuit testing Offset compensation is also provided to minimize thermal EMFs and associated errors.
Agilent IntuiLink:Easy Data Access
The included Agilent IntuiLink software allows your captured data to be put to work easily, using PC applications such as Microsoft Excel(R) or Word(R) to analyze, interpret, display, print, and document the data you get from the 34420A. You can specify the meter setup and take a single reading or log data to the Excel spreadsheet in specified time intervals. To find out more about IntuiLink visit www.agilent.com/find/intuilink
Take the Uncertainty Out of Your Low-Level Measurements
Low-noise input amplifiers and a highly tuned input protection scheme bring reading noise down to 8 nVpp. Combine this with 71/2 digits of resolution, selectable analog and digital filtering, 2 ppm basic 24-hour dcV accuracy, and a shielded, copper pin connector and you've got accurate, repeatable measurements you can count on.
Quality You Can Count On
The 34420A gives you the quality and reliability you expect from Agilent Technologies. From the product's proven >150,000 hour Mean Time Between Failure, to its standard 1-year warranty, Agilent stands behind you to bring a new level of confidence to your low-level measurements.
SPRT Measurements
Built-in ITS-90 conversion routines accept the calibration coefficients from your SPRT probe for direct temperature measurement and conversion. Thermocouples, thermistors, and RTDs are also supported.
Specifications
Accuracy Specifications (% of reading + % of range) 1
Function Range2 Test Current 24 Hour 23 C 1 C 90 Day 23 C 5 C 1 Year 23 C 5 C Temperature Coefficient 0 C--18 C 28 C--55 C 0.0004 + .0001 0.0004 + .0001 0.0004 + .00006 0.0004 + .00004 0.0001 + .00002 0.0004 + .00005 0.0005 + .00002 0.0005 + .00001 0.0005 + .00001 0.0005 + .00001 0.0005 + .00001 0.0005 + .00002 0.0006 + .00003 0.0005 + .00002 0.0005 + .00001 0.0005 + .00001 0.0005 + .00001 0.0005 + .00001 0.0005 + .00003 0.0006 + .00003 0.0005 + .00002 0.0005 + .00002 1 1 10 100 1 K 1 K 1 K 1 1 10 100 1 K 1 K 1 K 1 5 Maximum per Lead Resistance
dc Voltage
1.0000000 mV3 10.000000 mV3 100.00000 mV 1.0000000 V 10.000000 V 100.00000 V4 1.0000000 10.000000 100.00000 1.0000000 K 10.000000 K 100.00000 K 1.0000000 M 1.0000000 10.000000 100.00000 1.0000000 K 10.000000 K 100.00000 K 1.0000000 M 10.000000 100.00000 10 mA 10 mA 10 mA 1 mA 100 A 10 A 5 A 10 mA 10 mA 1 mA 100 A 10 A 5 A 5 A 1 mA 100 A
0.0025 + .0020 0.0025 + .0002 0.0015 + .0003 0.0010 + .0003 0.0002 + .0001 0.0010 + .0004 0.0015 + .0002 0.0015 + .0002 0.0015 + .0002 0.0015 + .0002 0.0015 + .0002 0.0015 + .0003 0.0020 + .0003 0.0015 + .0002 0.0015 + .0002 0.0015 + .0002 0.0015 + .0002 0.0015 + .0004 0.0015 + .0012 0.0020 + .0003 0.0020 + .0002 0.0025 + .0002
0.0040 + .0020 0.0040 + .0002 0.0030 + .0004 0.0025 + .0004 0.0020 + .0004 0.0025 + .0005 0.0050 + .0002 0.0040 + .0002 0.0040 + .0002 0.0040 + .0002 0.0040 + .0002 0.0040 + .0004 0.0050 + .0004 0.0050 + .0002 0.0040 + .0002 0.0040 + .0002 0.0040 + .0002 0.0040 + .0004 0.0040 + .0015 0.0050 + .0004 0.0050 + .0002 0.0050 + .0002
0.0050 + .0020 0.0050 + .0003 0.0040 + .0004 0.0035 + .0004 0.0030 + .0004 0.0035 + .0005 0.0070 + .0002 0.0060 + .0002 0.0060 + .0002 0.0060 + .0002 0.0060 + .0002 0.0060 + .0004 0.0070 + .0004 0.0070 + .0002 0.0060 + .0002 0.0060 + .0002 0.0060 + .0002 0.0060 + .0004 0.0060 + .0015 0.0070 + .0004 0.0070 + .0002 0.0070 + .0002
Resistance 5
Low Power Resistance 5
Voltage Limited Resistance 5, 6
Channel 1 / Channel 2 (dcV Ratio) Channel 1-Channel 2 (dcV Difference)
Ratio Error in % = Channel 1 accuracy in % + Channel 2 accuracy in % Difference Error = Channel 1 (% of reading + % of range) + Channel 2 (% of reading + % of range)
Temperature (resolution = 0.001 C) SPRT 7 RTD Thermistor Thermocouple 8
SPRT Probe Accuracy + 0.003C RTD Probe Accuracy + 0.05C Thermistor Probe Accuracy + 0.1C Thermocouple Probe Accuracy + 0.2C
DC Voltage Noise 9
Observation Period Range 2-Minute RMS Noise 1.3 nVrms 1.5 nVrms 10 nVrms 100 nVrms 450 nVrms 11 Vrms 2-Minute Peak-Peak Noise 8 nVpp 10 nVpp 65 nVpp 650 nVpp 3 Vpp 75 Vpp 24-Hour Peak-Peak Noise 12 nVpp 14 nVpp 80 nVpp 800 nVpp 3.7 Vpp 90 Vpp
1 mV 10 mV 100 mV 1V 10 V 100 V
DC Voltage Noise vs Source Resistance 10
Source Resistance 0 100 1k 10k 100k 1M Noise 1.3 nVrms 1.7 nVrms 4 nVrms 13 nVrms 41 nVrms 90 nVrms Analog Filter Off Off Off Off On On Digital Filter Med Med Med Med Med Slow
1 Specifications are for Channel 1 or Channel 2, after 2-hour warm-up, resolution at 7.5 digits (100 NPLC), with FILTERS off. RESISTANCE specifications are for 4-wire Ohms or 2-wire ohms using Null. Without Null, add 0.2 Ohms additional error in 2-wire Ohms function. For Analog Filter ON, add 0.002% of reading. 2 20% overrange on all ranges except 5% on Voltage Limited Resistance. 3 After using Math Null. If Null is not used add 100 nanoVolts. 4 Channel 1 only. 5 Channel 1 only. Resistance measurements, for NPLC <1, add 160 rms noise. 6 Voltage limit can be set to 20 mV (default), 100 mV, or 500 mV. Measured resistance plus Channel 1 HI and LO lead resistance is limited to 10.5 on the 10 range and 105 on the 100 range. 7 For 25 SPRT with triple-point of water check within the last 4 hours. Without the triple-point of water check, add 0.013C for 24 hours, add 0.035C for 90 day, and add 0.055C for 1 year specifications. 8 For fixed reference junction. Add 0.3uC for external reference junction, add 2.0uC for internal reference junction. 9 After a 2-hour warm-up, 1uC, 6.5 digits (10 PLC) with Analog Filter Off and Digital Filter Medium (50 reading average). 2-minute rms and 24-hour noise typical. For measurements using 0.02 or 0.2 NPLC, add 800 nV rms noise. 10 Typical noise behavior for Ch 1 or Ch 2, after 2 hour warm-up, 6.5 digits (10 PLC), 2 minute observation period on 1 mV range. For peak-to-peak noise, multiply rms noise by 6.
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Measurement Characteristics
DC Voltage Measurement Method: Continuously integrating multi-slope III A-D Converter A-D Linearity: 0.00008% of reading + 0.00005% of range Input Resistance: 100V (Ch1 only): 10 M +- 1% 1mV through 10V: > 10 G, in parallel with < 3.6 nF Input Bias Current: <50 pA at 25 C Injected Current: <50 nA pp at 50 or 60 Hz Input Protection: 150 V peak any input terminal to Channel 1 LO, continuous Channel-to-channel switching error (typical): 3 nV Channel Isolation: Isolation between input channels >1010 Earth Isolation: 350 V peak any input terminal to earth. Impedance from any input terminal to earth is >10 G and <400 pF Maximum Voltage: Channel 1 LO to Channel 2 LO, 150V peak Resistance Measurement Method: Selectable 4-wire or 2-wire ohms. Current Source referenced to Channel 1 LO input Offset Compensation: Used on all ranges except 100 k and 1 M. Can be turned off if desired Protection: 150 V peak Open Circuit Voltage: For Resistance and Low Power Resistance <14 V. 20 mV, 100 mV, 500 mV selectable clamp Temperature SPRT: ITS-90 calibrated temperature with the range of -190C to +660C Thermocouple: ITS-90 conversions of Type B, E, J, K, N, R, S, T Thermistor: 5 k RTD: Type =.00385 and =.00392. R0 from 4.9 to 2.1 k. ITS -90 (IEC-751) Callendar Van Dusen conversion. Measurement Noise Rejection 60 (50) Hz1 dc CMRR: 140 dB ac CMRR: 70 dB
Integration Time 200 plc/3.335 s (4 s) 100 plc/1.675 s (2 s) 20 plc/334 ms (400 ms) 10 plc/167 ms (200 ms) 2 plc/33.3 ms (40 ms) 1 plc/16.7 ms (20 ms) <1 plc Normal Mode Rejection2 110 dB3 105 dB3 100 dB3 95 dB3 90 dB 60 dB 0
Operating Characteristics4
Function Digits Integration Time Readings/s 5
dcV Thermocouple
71/2 71/2 61/2 61/2 51/2 51/2 41/2 71/2 71/2 61/2 61/2 51/2 50 (50) 41/2 125 (125)
200 plc 100 plc 20 plc 10 plc 1 plc 0.2 plc 0.02 plc 200 plc 100 plc 20 plc 10 plc 1 plc
.15 (.125) .3 (.25) 1.5 (1.25) 3 (2.5) 25 (20.8) 100 (100) 250 (250) .075 (.062) .15 (.125) .75 (.625) 1.5 (1.25) 12.5 (10.4)
Resistance dcV1/DCV2 dcV 1-2 RTD Thermistor 0.2 plc 0.02 plc
System Speeds6 Configuration Rates: 26/s to 50/s Autorange Rate (Volts): >30/s ASCII reading to RS-232: 55/s ASCII reading to GPIB: 250/s Max. Internal Trigger Rate: 250/s Max. Ext. Trig. Rate to Memory: 250/s Triggering and Memory Reading HOLD Sensitivity: 10%, 1%, 0.1%, or 0.01% of range Samples/Trigger: 1 to 50,000 Trigger Delay: 0 to 3600 s; 10 s step size External Trigger Delay: <1 ms External Trigger Jitter: <500 s Memory: 1024 readings Math Functions NULL (Channel 1 dcV, Channel 2 dcV, Difference, Resistance, Temperature) STATS (Min, Max, Average, Peak-Peak, Standard Deviation, Number of readings) SCALE (Allows linear scaling as y = mx+b) CHART NULL (Establishes zero for rear panel output) Filter (Analog or Digital or Both) Analog: Low pass 2 pole @ 13Hz, available for dcV on 1 mV, 10 mV, 100 mV range Digital: Moving average filter, 10 (fast), 50 (medium), or 100 (slow) reading averages.
Chart Out (Analog Out) Maximum output: 3V Resolution: 16 bits Accuracy: 0.1% of output + 1 mV Output Resistance: 1 k 5% Update rate: once per reading Span and Offset: Adjustable Standard Programming Languages SCPI (IEEE 488.2), Keithley 181 Accessories Included 4 ft low thermal cable with copper spade lugs, Kelvin clip set, 4-wire shorting plug, user's manual, service manual, test report, contact cleaner, and powercord. General Specifications Front Panel Connection: Shielded, low thermal, 99% copper contacts. Power Supply: 100V/120V/220V(230V)/240V +- 10%. Power Line Frequency: 45 Hz to 66 Hz and 360 Hz to 440 Hz. Automatically sensed at power-on. Power Consumption: 25VA peak (10W average). Operating Environment: Full accuracy for 0 C to 55 C. Full accuracy to 80% R.H. up to 30 C. Storage Environment: -40 C to 75 C. Size: 254.4 mm W x 374.0 mm L x 103.6 mm H (10.02" W x 14.72" L x 4.08" H) Weight: 3 kg (6.5 lbs). Safety: Designed to CSA, UL-1244, IEC-1010. RFI and ESD: CISPR 11.
1 For 1 k unbalanced in LO lead. 2 For power line frequency - 0.1%, Filters OFF. For Digital Filter slow add 20 db, for medium or fast add 10 db for NPLC 1. 3 For power line frequency - 1%, use 80 db, for - 3% use 60 db. 4 Speeds are for delay 0, Display OFF, Filters OFF, Offset Compensation OFF. 5 Reading speeds for 60 Hz or (50 Hz), 100 mV through 100 V ranges. 1 mV range 30/s MAX, 10 mV range 170/s MAX, thermocouple 120/s MAX. 6 Speeds are for NPLC 0.02, Delay 0, Display OFF, Chart Out OFF.
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Ordering Information
34420A nanoVolt/micro-Ohm meter
Accessories
34102A Low-thermal input cable (fourconductor) with copper spade lugs Includes low-thermal input cable (34102A), 34103A Low-thermal shorting plug low-thermal shorting plug (34103A), Kelvin 34104A Low-thermal input connector clip set(11062A), operating manual, service 34161A Accessory pouch manual, and quick reference guide, test report with calibration sticker, 2.3 ml bottle of contact cleaner, and power cord. Options 34420A-1CM Rack mount kit (P/N 5062-3972) 34420A-ABA English localization 34420A-ABD German localization: translated operating manual 34420A-ABF French localization: translated operating manual 34420A-ABJ Japanese localization: translated operating manual 34420A-A6J ANSI Z540 compliant calibration
Product specifications and descriptions in this document subject to change without notice. (c) Agilent Technologies, Inc. 2009 Printed in USA, July 8, 2009 5968-0161EN

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