Specifications
1
Accuracy Specifications ± ±( of reading ꢀ ( of rangeꢁ
2
Function
Range
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
Maximum
per Lead
Resistance
3
3
dc Voltage
1.0000000 mV
10.000000 mV
100.00000 mV
1.0000000 V
10.000000 V
0.0025 + .0020
0.0025 + .0002
0.0015 + .0003
0.0010 + .0003
0.0002 + .0001
0.0010 + .0004
0.0040 + .0020
0.0040 + .0002
0.0030 + .0004
0.0025 + .0004
0.0020 + .0004
0.0025 + .0005
0.0050 + .0020
0.0050 + .0003
0.0040 + .0004
0.0035 + .0004
0.0030 + .0004
0.0035 + .0005
0.0004 + .0001
0.0004 + .0001
0.0004 + .00006
0.0004 + .00004
0.0001 + .00002
0.0004 + .00005
4
100.00000 V
5
Resistance
1.0000000 Ω
10.000000 Ω
100.00000 Ω
1.0000000 KΩ
10.000000 KΩ
100.00000 KΩ
10 mA
10 mA
10 mA
1 mA
100 µA
10 µA
5 µA
0.0015 + .0002
0.0015 + .0002
0.0015 + .0002
0.0015 + .0002
0.0015 + .0002
0.0015 + .0003
0.0020 + .0003
0.0050 + .0002
0.0040 + .0002
0.0040 + .0002
0.0040 + .0002
0.0040 + .0002
0.0040 + .0004
0.0050 + .0004
0.0070 + .0002
0.0060 + .0002
0.0060 + .0002
0.0060 + .0002
0.0060 + .0002
0.0060 + .0004
0.0070 + .0004
0.0005 + .00002
0.0005 + .00001
0.0005 + .00001
0.0005 + .00001
0.0005 + .00001
0.0005 + .00002
0.0006 + .00003
1 Ω
1 Ω
10 Ω
100 Ω
1 KΩ
1 KΩ
1 KΩ
1.0000000 MΩ
Low Power
Resistance
1.0000000 Ω
10.000000 Ω
100.00000 Ω
1.0000000 KΩ
10.000000 KΩ
100.00000 KΩ
1.0000000 MΩ
10 mA
10 mA
1 mA
100 µA
10 µA
5 µA
0.0015 + .0002
0.0015 + .0002
0.0015 + .0002
0.0015 + .0002
0.0015 + .0004
0.0015 + .0012
0.0020 + .0003
0.0050 + .0002
0.0040 + .0002
0.0040 + .0002
0.0040 + .0002
0.0040 + .0004
0.0040 + .0015
0.0050 + .0004
0.0070 + .0002
0.0060 + .0002
0.0060 + .0002
0.0060 + .0002
0.0060 + .0004
0.0060 + .0015
0.0070 + .0004
0.0005 + .00002
0.0005 + .00001
0.0005 + .00001
0.0005 + .00001
0.0005 + .00001
0.0005 + .00003
0.0006 + .00003
1 Ω
5
1 Ω
10 Ω
100 Ω
1 KΩ
1 KΩ
1 KΩ
5 µA
Voltage Limited
10.000000 Ω
100.00000 Ω
1 mA
100 µA
0.0020 + .0002
0.0025 + .0002
0.0050 + .0002
0.0050 + .0002
0.0070 + .0002
0.0070 + .0002
0.0005 + .00002
0.0005 + .00002
1 Ω
5 Ω
5, 6
Resistance
Channel 1 / Channel 2 (dcV Ratio)
Ratio Error in % = Channel 1 accuracy in % + Channel 2 accuracy in %
Channel 1-Channel 2 (dcV Difference) Difference Error = Channel 1 (% of reading + % of range) + Channel 2 (% of reading + % of range)
Temperature
(resolution = 0.001 °C)
7
SPRT
SPRT Probe Accuracy + 0.003°C
RTD
Thermistor
Thermocouple
RTD Probe Accuracy + 0.05°C
Thermistor Probe Accuracy + 0.1°C
Thermocouple Probe Accuracy + 0.2°C
8
9
DC Voltage Noise
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.
20% overrange on all ranges except 5% on Voltage Limited Resistance.
After using Math Null. If Null is not used add 100 nanoVolts.
Channel 1 only.
Observation Period
Range
2-Minute
RMS
Noise
1.3 nVrms
1.5 nVrms
10 nVrms
100 nVrms
450 nVrms
11 µVrms
2-Minute
Peak-Peak
Noise
24-Hour
Peak-Peak
Noise
12 nVpp
14 nVpp
80 nVpp
800 nVpp
3.7 µVpp
90 µVpp
2
3
4
5
Channel 1 only. Resistance measurements, for NPLC <1, add 160 µΩ rms
noise.
1 mV
10 mV
100 mV
1 V
10 V
100 V
8 nVpp
10 nVpp
65 nVpp
650 nVpp
3 µVpp
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 Ω on the
10 Ω range and 105 Ω on the 100 Ω range.
7
For 25 Ω SPRT with triple-point of water check within the last 4 hours.
Without the triple-point of water check, add 0.013°C for 24 hours, add 0.035°C
for
75 µVpp
90 day, and add 0.055°C for 1 year specifications.
8
9
For fixed reference junction. Add 0.3ûC for external reference junction, add
2.0ûC for internal reference junction.
10
DC Voltage Noise vs Source Resistance
After a 2-hour warm-up, 1ûC, 6.5 digits (10 PLC) with Analog Filter Off and
Digital Filter Medium (50 reading average).
Source
Resistance
Analog
Filter
Digital
Filter
Noise
2-minute rms and 24-hour noise typical. For measurements using 0.02 or 0.2
NPLC, add 800 nV rms noise.
0 Ω
100 Ω
1k Ω
10k Ω
100k Ω
1M Ω
1.3 nVrms
1.7 nVrms
4 nVrms
13 nVrms
41 nVrms
90 nVrms
Off
Off
Off
Off
On
On
Med
Med
Med
Med
Med
Slow
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, mul-
tiply rms noise by 6.
2
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