34420A Datasheet, PDF (4/6 Pages) Agilent(Hewlett-Packard) – NanoVolt/Micro-Ohm Meter

04 | Keysight | 34420A NanoVolt/Micro-Ohm Meter - Data Sheet
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 MΩ +- 1%
1mV through 10V: > 10 GΩ, 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 Ω
Earth Isolation:
350 V peak any input terminal to earth.
Impedance from any input terminal to earth
is >10 GΩ 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 kΩ and 1 MΩ.
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 -190°C to +660°C
Thermocouple:
ITS-90 conversions of Type B, E, J, K, N, R, S, T
Thermistor: 5 kΩ
RTD: Type α =.00385 and α =.00392. R0 from
4.9 Ω to 2.1 kΩ. ITS -90 (IEC-751) Callendar
Van Dusen conversion.
Measurement Noise Rejection 60 (50) Hz¹
dc CMRR: 140 dB
ac CMRR: 70 dB
Operating Characteristics⁴
Function
Digits
dcV
Thermocouple
7-1/2
7-1/2
6-1/2
6-1/2
5-1/2
5-1/2
4-1/2
Resistance
dcV1/DCV2
dcV 1-2
RTD
Thermistor
0.2 plc
0.02 plc
7-1/2
7-1/2
6-1/2
6-1/2
5-1/2
50 (50)
4-1/2
125 (125)
Integration Time
Normal Mode
Rejection²
200 plc/3.335 s (4 s)
110 dB³
100 plc/1.675 s (2 s)
105 dB³
20 plc/334 ms (400 ms) 100 dB³
10 plc/167 ms (200 ms) 95 dB³
2 plc/33.3 ms (40 ms)
90 dB
1 plc/16.7 ms (20 ms)
60 dB
<1 plc
0
System Speeds⁶
Coniguration 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 μs step size
External Trigger Delay: <1 ms
External Trigger Jitter: <500 μs
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)
Integration Time
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
Readings/s ⁵
.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)
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 ilter, 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 kΩ ± 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 power cord.
1 For 1 kΩ 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 NPLC³ 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.