# PXI-4071 Specifications

Version:

These specifications apply to the PXI-4071.

## Definitions

Warranted specifications describe the performance of a model under stated operating conditions and are covered by the model warranty.

Characteristics describe values that are relevant to the use of the model under stated operating conditions but are not covered by the model warranty.

• Typical specifications describe the expected performance met by a majority of the models.
• Nominal specifications describe parameters and attributes that may be useful in operation.

Specifications are Warranted unless otherwise noted.

## Conditions

Specifications are valid under the following conditions unless otherwise noted.

• Calibration interval of 2 years
• 1 hour of warm-up time

## DC Specifications

Table 1. PXI-4071 DC Speeds, Nominal
Digits Bits Max Sampling Rate[1] (Digitizer) Reading Rate[2] (DMM)
26 N/A 7 S/s
22 100 S/s 100 S/s
18 5 kS/s 3 kS/s
15 20 kS/s 7 kS/s
3 10 1.8 MS/s N/A
Figure 1. DC Voltage Maximum Reading Rate, Nominal

### DC System Speeds

 Range or function change 100/s Auto Range time, DC V 5 ms Auto Range time, DC I 10 ms Auto Range time, resistance 50 ms Trigger latency 2 μs Maximum trigger rate 6 kHz

### DC Accuracy Specifications

Note

All DC voltage accuracy specifications apply to 7½-digit resolution, Auto Zero and ADC calibration enabled.

Table 2. DC Voltage ± (ppm of reading + ppm of range)
Range Resolution 24 Hr[3] Tcal ±1 °C[4] 90 Day 18 °C to 28 °C Tcal ±1 °C 2 Year 18 °C to 28 °C Tcal ±1 °C Tempco/°C 0 °C to 55 °C 2 Year[5] 0 °C to 55 °C Tcal ±5 °C
Without Self-cal With Self-cal
100 mV[6] 10 nV 5 + 4 18 + 7 20 + 8 3 + 2 0.3 + 1 30 + 10
1 V[7] 100 nV 4 + 0.8 13 + 0.8 15 + 0.8 2 + 0.2 0.3 + 0.1 22 + 0.8
10 V 1 μV 2 + 0.5 9 + 0.5 12 + 0.5 0.3 + 0.02 0.3 + 0.01 15 + 0.5
100 V 10 μV 5 + 2 18 + 2 20 + 2 4 + 0.2 0.3 + 0.1 32 + 2
1000 V[8] 100 μV 4 + 0.5 18 + 0.5 20 + 0.5 3 + 0.02 0.3 + 0.01 32 + 0.5
Table 3. RMS Noise [9]
Range Multiplier
100 mV × 15
1 V × 2
10 V × 1
100 V × 6
1000 V × 1
Note

All DC current specifications apply to 6½-digit resolution, Auto Zero and ADC calibration enabled.

Table 4. DC Current ± (ppm of reading + ppm of range)
Range Resolution Burden Voltage 24 Hr[10] Tcal ±1 °C 90 Day 18 °C to 28 °C Tcal ±1 °C 2 Year 18 °C to 28 °C Tcal ±1 °C Tempco[11]/°C 0 °C to 55 °C
1 μA[12] 1 pA <55 mV 25 + 20 320 + 40 350 + 40 25 + 0.7
10 μA [12] 10 pA <550 mV 25 + 2 320 + 15 350 + 15 25 + 0.7
100 μA 100 pA <60 mV 10 + 20 71 + 20 100 + 20 10 + 0.5
1 mA 1 nA <60 mV 4 + 20 80 + 20 100 + 20 4 + 0.5
10 mA 10 nA <60 mV 12 + 20 90 + 20 110 + 20 12 + 0.5
100 mA 100 nA <100 mV 9 + 20 140 + 20 165 + 20 15 + 0.5
1 A[13] 1 μA <250 mV 15 + 20 240 + 20 290 + 20 11 + 0.5
3 A[13] 1 μA <700 mV 15 + 30 390 + 30 440 + 30 11 + 0.5
Table 5. Additional Noise Errors for Current
5½ digits 10 ppm of range
5 digits 30 ppm of range
4½ digits 100 ppm of range
Note

All resistance specifications apply to 7½-digit resolution, Auto Zero and ADC calibration enabled.

Table 6. Resistance (4-Wire and 2-Wire [14]) ± (ppm of reading + ppm of range)
Range[15] Test Current[16] Max Test Voltage 24 Hr[17] Tcal [18]±1 °C 90 Day 18 °C to 28 °C Tcal ±1 °C 2 Year 18 °C to 28 °C Tcal ±1 °C Tempco[19]/°C 0 °C to 55 °C 2 Year[20] 0 °C to 55 °C Tcal ±5 °C
Without Self-cal With Self-cal
100 Ω[21] 1 mA 100 mV 8 + 2.5 31 + 4 56 + 4 6 + 0.12 0.8 + 0.12 60 + 5
1 kΩ[21] 1 mA 1 V 5 + 0.5 26 + 0.5 48 + 0.5 5 + 0.05 0.8 + 0.05 55 + 1
10 kΩ[21] 100 μA 1 V 5 + 0.5 26 + 0.5 48 + 0.5 5 + 0.05 0.8 + 0.05 55 + 1
100 kΩ[22] 10 μA 1 V 5 + 1 28 + 1 50 + 1 5 + 0.2 0.8 + 0.1 56 + 6
1 MΩ 10 μA 10 V 5 + 1 30 + 1 52 + 1 5 + 0.05 3 + 0.05 58 + 1
10 MΩ 1 μA 10 V 60 + 5 70 + 10 90 + 10 20 + 1 20 + 1 400 + 10
30 MΩ[23] 1 μA|| 10 MΩ 10 V 180 + 20 240 + 30 360 + 60 60 + 20 60 + 20
100 MΩ[24] 1 μA||10 MΩ 10 V 500 + 6 5500 + 10 6000 + 20 250 + 6 250 + 6
5 GΩ[24], [25] 1 μA||10 MΩ 10 V 1% + 0.2% 5% + 0.2% 5% + 0.2% 2500 + 0.2% 2500 + 0.2%
Table 7. RMS Noise [26]
Range Multiplier
100 Ω × 8
1 kΩ × 1
10 kΩ × 1
100 kΩ × 2
1 MΩ × 3.5
10 MΩ × 5
100 MΩ × 55
5 GΩ × 2500
Note

All diode specifications apply to 6½-digit resolution, Auto Zero and ADC calibration enabled.

Table 8. Diode Test
Range Resolution Test Current[27] Accuracy
10 V 10 μV 1 μA, 10 μA, 100 μA, 1 mA[28] Add 20 ppm of reading to 10 VDC voltage specifications.

### DC Functions General Specifications

 Effective CMRR (1 kΩ resistance in LO lead) >140 dB (DC), 100 ms aperture; >170 dB ( >46 Hz) with high-order DC noise rejection, 100 ms aperture Maximum 4-wire lead resistance Use the lesser of 10% of range or 1 kΩ Overrange 105% of range except 1000 V and 3 A range DC voltage input bias current <30 pA at 23 °C, typical Input Impedance >10 GΩ or 10 MΩ (100 mV, 1 V, and 10 V ranges only) in parallel with 90 pF, nominal
Table 9. Normal-Mode Rejection Ratio (NMRR)
10 >100 dB[29] All noise sources >46 Hz
50 (60) >60 dB[30] 50 (60) Hz ±0.1%

## AC Specifications

Note

All AC speed specifications apply with Auto Zero disabled.

Table 10. PXI-4071 AC Bandwidth
0.25 S/s 1 Hz to 300 kHz
2.5 S/s 10 Hz to 300 kHz
25 S/s 100 Hz to 300 kHz
100.0 S/s 400 Hz to 300 kHz
1.0 kS/s 20 kHz to 300 kHz

### AC System Speeds

 Range or function change 10/s Auto Range time, AC V and AC I 250 ms Trigger latency 2 μs Maximum trigger rate 1 kHz

### AC Accuracy Specifications

Note

All AC accuracy specifications apply to 6½ digit resolution, signal amplitudes greater than 1% of range, and Auto Zero enabled.

Table 11. AC Voltage [31] 2 Year ± (% of reading + % of range), 18 °C to 28 °C
Range (RMS) Peak Voltage Resolution 1 Hz to 40 Hz[32] >40 Hz to 20 kHz >20 kHz to 50 kHz >50 kHz to 100 kHz >100 kHz to 300 kHz
50 mV[33] ±105 mV 100 nV 0.1 + 0.02 0.05 + 0.02 0.07 + 0.02 0.3 + 0.02 0.7 + 0.15
500 mV ±1.05 V 1 μV 0.1 + 0.005 0.05 + 0.005 0.06 + 0.01 0.2 + 0.01 0.7 + 0.15
5 V ±10.5 V 10 μV
50 V ±105 V 100 μV 0.1 + 0.005 0.06 + 0.01 0.12 + 0.05 0.6 + 0.05 3 + 0.15
700 V ±1000 V 1 mV
Table 12. AC Voltage Tempco/°C ( 0 °C to 55 °C)
Range (RMS) 1 Hz to 40 Hz >40 Hz to 20 kHz >20 kHz to 50 kHz >50 kHz to 100 kHz >100 kHz to 300 kHz
• 50 mV
• 500 mV
• 5 V
0.001 + 0.0002 0.001 + 0.0002 0.001 + 0.001 0.001 + 0.001 0.01 + 0.01
• 50 mV
• 700 mV
0.001 + 0.0002 0.003 + 0.0002 0.012 + 0.001 0.045 + 0.001 0.1 + 0.01

### AC Voltage General Specifications

Input impedance

10 MΩ in parallel with 90 pF, nominal

Input coupling

AC or DC coupling

Overrange

105% of range except 700 V

Maximum Volt-Hertz product

>8 × 107 V-Hz

Maximum DC voltage component

400 V

CMRR

1 kΩ resistance in LO lead

>70 dB (DC to 60 Hz)

Over full bandwidth (without 1 kΩ resistance in LO lead)

Refer to the CMRR Over Full Bandwidth graph, typical.

Figure 4. CMRR Over Full Bandwidth, Typical

### AC Current General Specifications

Table 13. AC Current [34] 2 Year ± (% of reading + % of range), 18 °C to 28 °C
Range (RMS) Peak Current Resolution Burden Voltage (RMS at 1 kHz), Typical 1 Hz to 5 kHz 5 kHz to 10 kHz[35] 10 kHz to 20 kHz[35] Tempco/°C (0 °C to 55 °C)
100 μA[36] ±200 μA 100 pA <60 mV 0.03 + 0.02 0.002 + 0.0002
1 mA ±2 mA 1 nA <60 mV 0.03 + 0.02 0.06 + 0.02 0.08 + 0.02 0.001 + 0.0001
10 mA ±20 mA 10 nA <60 mV 0.03 + 0.02 0.06 + 0.02 0.08 + 0.02 0.002 + 0.0002
100 mA ±200 mA 100 nA <100 mV 0.03 + 0.02 0.06 + 0.02 0.15 + 0.02 0.001 + 0.0002
1 A ±2 A 10 μA <250 mV 0.1 + 0.02 0.24 + 0.02 0.8 + 0.02 0.002 + 0.0002
3 A ±4.2 A[37] 10 μA <700 mV 0.1 + 0.02 0.24 + 0.02 0.8 + 0.02 0.002 + 0.0001
Note

No degradation in accuracy occurs due to crest factor for signals up to the rated peak voltage/current or bandwidth. For high crest factor signals, increase range. For example, for a 500 mVrms signal with a crest factor between 2 and 20, use the 5 V range.

 Overrange 105% of range except 3 A range

## Frequency and Period

Table 14. PXI-4071 Frequency and Period [38]
Input Range Frequency Range Period Range Resolution 2-Year Accuracy[39] 0 °C to 55 °C ± % of reading
50 mV to 700 V 1 Hz to 500 kHz 1 s to 2 μs 6½ digits 0.01

## Temperature Accuracy Specifications (°C)

Table 15. Thermocouple Temperature Accuracy Specifications (°C) [40]
Type Range 2 Year 18 °C to 28 °C Tcal ±1 °C Tempco/°C[41] Resolution
With Simulated Ref. Junction [42] With PXI-2527[43]
J -150 to 1200 0.3 1.0 0.03 0.1
-210 to -150 0.4 1.2 0.03 0.1
K -100 to 1200 0.4 1.0 0.03 0.1
-200 to -100 0.4 1.5 0.03 0.1
N -100 to 1300 0.3 1.0 0.03 0.1
-200 to -100 0.6 1.5 0.03 0.1
T -100 to 400 0.3 1.0 0.03 0.1
-200 to -100 0.4 1.5 0.03 0.1
E -150 to 1000 0.2 1.0 0.03 0.1
-200 to -150 0.3 1.5 0.03 0.1
R 300 to 1760 0.6 1.8 0.06 0.1
-50 to 300 1.4 1.9 0.06 0.1
S 400 to 1760 0.7 1.8 0.06 0.1
-50 to 400 1.3 1.8 0.06 0.1
B 1100 to 1820 0.6 1.8 0.09 0.1
400 to 1100 1.4 1.9 0.09 0.1
Table 16. RTD [44] Temperature Accuracy Specifications (°C)
Range 2 year 18 °C to 28 °C Tcal ±1 °C[42] Tempco/°C[41] Resolution
-200 to 600 0.14 0.011 0.01
Table 17. Thermistor Temperature Accuracy Specifications (°C) [45]
Range 2 year 18 °C to 28 °C Tcal ±1 °C[42] Tempco/°C[41] Resolution
-80 to 150 0.08 0.002 0.01

## Isolated Digitizer Specifications

Note

For typical DC accuracy, refer to the DC voltage specifications and the DC current specifications in the DC Specifications section.

Table 18. Voltage Mode
Range Input Impedance, Nominal[46] Flatness Error 20 kHz, Typical Bandwidth (-3 dB), Typical[47] THD 1 kHz signal, -1 dBfs, Typical THD 20 kHz signal, -1 dBfs, Typical
100 mV >10 GΩ, 10 MΩ -0.014 dB 340 kHz -108 dB -90 dB
1 V >10 GΩ, 10 MΩ -0.014 dB 335 kHz -110 dB -86 dB
10 V >10 GΩ, 10 MΩ -0.014 dB 325 kHz -90 dB -64 dB
100 V 10 MΩ -0.050 dB 280 kHz -110 dB -92 dB
1000 V 10 MΩ -0.050 dB 245 kHz -89 dB -70 dB
Table 19. Current Mode
Range Burden Voltage, Typical Flatness Error 20 kHz, Typical Bandwidth (-3 dB), Typical
100 μA <60 mV ±0.42 dB 42 kHz
1 mA <60 mV ±0.01 dB 450 kHz
10 mA <60 mV ±0.01 dB 450 kHz
100 mA <100 mV ±0.01 dB 450 kHz
1 A <250 mV ±0.01 dB 450 kHz
3 A <700 mV ±0.01 dB 450 kHz

### Acquisition System

Sampling rate and record duration

Available sampling rates

$r=\text{\hspace{0.17em}}\frac{1.8\text{\hspace{0.17em}}MS/s}{y}$, where y = 1, 2, 3,...1.8 × 105

Minimum record duration

8.89 μs

Maximum record duration

149 s

Record duration

n/r, where n = number of samples, r = sampling rate

Variable resolution

10-23 bits; refer to Digitizer Maximum Sampling Rate graph

Available functions

Voltage and current

Voltage ranges

±100 mV to ±1000 V (DC or AC coupled)

Current ranges

±100 μA to ±3 A

Timebase accuracy

25 ppm

Input trigger

Latency[48]

3.6 μs

Jitter

<600 ns

Note

Refer to Trigger Specifications for additional input trigger specifications.

Figure 5. Digitizer Maximum Sampling Rate, Nominal

## General Specifications

 Warm-up 1 hour to rated accuracy Self-calibration Calibrates the FlexDMM relative to high-precision internal voltage and resistance standards. No external calibration equipment required. External calibration interval 2 year recommended Measurement category I[49] (up to 1000 VDC or ACrms), II (up to 500 VDC or ACrms)
Caution

Do not use this device for connection to signals or for measurements within Measurement Categories III or IV.

Input protection
Resistance

2-wire

Up to 1000 VDC

4-wire

Up to 500 VDC

Diode

Up to 1000 VDC

DC V, AC V

Up to 1000 VDC, 700 V ACrms, 1000 V AC peak

DC I and AC I

F 3 A 250 V fast-acting user-replaceable fuse

Maximum common-mode voltage

500 VDC or ACrms

Maximum voltage to earth ground

HI

1000 VDC or peak AC

LO

500 VDC or peak AC

HI SENSE

500 VDC or peak AC

LO SENSE

500 VDC or peak AC

Fuse

When this fuse symbol is marked on a device, take proper precautions.

Hazardous Voltage

This icon denotes a warning advising you to take precautions to avoid electrical shock.

### Trigger Characteristics

Measurement complete trigger pulse width

3 μs

Input trigger pulse width

1 μs, with <2 m cable

Maximum voltage to earth ground at AUX I/O connector

5.5 V DC

Trigger voltage levels

Vin High

2.0 V min

Vin Low

0.8 V max

Vout High

2.4 V min

Vout Low

0.4 V max

Trigger voltage level absolute maximums

Vin High

5.5 V

Vin Low

-0.5 V

Note

Triggers are LVTTL/TTL compatible.

Caution

The AUX I/O connector on the PXI-4071 is not isolated. This connector is not referenced to the measurement circuit but is referenced to the ground of the PXI chassis. Do not operate the digital signals of this connector beyond -0.5 V to 5.5 V of the PXI chassis ground.

### Power Requirements

Caution

Do not operate the PXI-4071 in a manner not specified in this document. Product misuse can result in a hazard. You can compromise the safety protection built into the product if the product is damaged in any way. If the product is damaged, return it to NI for repair.

 Power consumption <8 W from PXI backplane
Table 20. PXI-4071 Power Requirements, Typical
Rail Voltage Current Consumption Power Consumption
12 V 500 mA 6.00 W
5 V 30 mA 0.15 W
3.3 V 230 mA 0.76 W
-12 V 0 mA 0.00 W

### Physical Characteristics

 Dimensions 3U, one-slot, PXI/cPCI module 2.0 cm × 13.0 cm × 21.6 cm (0.8 in. × 5.1 in. × 8.5 in.) Weight 314 g (11 oz)
Note

If you need to clean the device, wipe it with a dry towel.

## Environment

 Maximum altitude 2,000 m (at 25 °C ambient temperature) Pollution Degree 2

Indoor use only.

### Operating Environment

 Ambient temperature range 0 °C to 55 °C (Tested in accordance with IEC 60068-2-1 and IEC 60068-2-2.) Relative humidity range Up to 95% at 40 °C

### Storage Environment

 Ambient temperature range -40 °C to 70 °C (Tested in accordance with IEC 60068-2-1 and IEC 60068-2-2.) Relative humidity range 5% to 95%, noncondensing (Tested in accordance with IEC 60068-2-56.)

### Shock and Vibration

Operational shock

30 g peak, half-sine, 11 ms pulse (Tested in accordance with IEC 60068-2-27. Test profile developed in accordance with MIL-PRF-28800F.)

Random vibration

Operating

5 Hz to 500 Hz, 0.3 grms (Tested in accordance with IEC 60068-2-64.)

Nonoperating

5 Hz to 500 Hz, 2.4 grms (Tested in accordance with IEC 60068-2-64. Test profile exceeds the requirements of MIL-PRF-28800F, Class 3.)

## Compliance and Certifications

### Safety

This product is designed to meet the requirements of the following electrical equipment safety standards for measurement, control, and laboratory use:

• IEC 61010-1, EN 61010-1
• UL 61010-1, CSA C22.2 No. 61010-1
Note

For UL and other safety certifications, refer to the product label or the Online Product Certification section.

### Electromagnetic Compatibility

This product meets the requirements of the following EMC standards for electrical equipment for measurement, control, and laboratory use:
• EN 61326-1 (IEC 61326-1): Class A emissions; Basic immunity
• EN 55011 (CISPR 11): Group 1, Class A emissions
• EN 55022 (CISPR 22): Class A emissions
• EN 55024 (CISPR 24): Immunity
• AS/NZS CISPR 11: Group 1, Class A emissions
• AS/NZS CISPR 22: Class A emissions
• FCC 47 CFR Part 15B: Class A emissions
• ICES-001: Class A emissions
Caution

To ensure the specified EMC performance, operate this product according to the documentation.

Note

In the United States (per FCC 47 CFR), Class A equipment is intended for use in commercial, light-industrial, and heavy-industrial locations. In Europe, Canada, Australia, and New Zealand (per CISPR 11), Class A equipment is intended for use only in heavy-industrial locations.

Note

Group 1 equipment (per CISPR 11) is any industrial, scientific, or medical equipment that does not intentionally generate radio frequency energy for the treatment of material or inspection/analysis purposes.

Note

For EMC declarations, certifications, and additional information, refer to the Online Product Certification section.

### CE Compliance

This product meets the essential requirements of applicable European Directives, as follows:

• 2014/35/EU; Low-Voltage Directive (safety)
• 2014/30/EU; Electromagnetic Compatibility Directive (EMC)

### Online Product Certification

Refer to the product Declaration of Conformity (DoC) for additional regulatory compliance information. To obtain product certifications and the DoC for this product, visit ni.com/certification, search by model number or product line, and click the appropriate link in the Certification column.

### Environmental Management

NI is committed to designing and manufacturing products in an environmentally responsible manner. NI recognizes that eliminating certain hazardous substances from our products is beneficial to the environment and to NI customers.

For additional environmental information, refer to the Minimize Our Environmental Impact web page at ni.com/environment. This page contains the environmental regulations and directives with which NI complies, as well as other environmental information not included in this document.

#### Waste Electrical and Electronic Equipment (WEEE)

EU Customers

At the end of the product life cycle, all NI products must be disposed of according to local laws and regulations. For more information about how to recycle NI products in your region, visit ni.com/environment/weee.

#### 电子信息产品污染控制管理办法（中国RoHS）

中国客户

National Instruments符合中国电子信息产品中限制使用某些有害物质指令(RoHS)。关于National Instruments中国RoHS合规性信息，请登录 ni.com/environment/rohs_china。(For information about China RoHS compliance, go to ni.com/environment/rohs_china.)

• 1 Maximum sampling rates refer to waveform acquisition in digitizer mode.
• 2 Auto Zero disabled, except 7½ digits, measured on a 10 V and 10 kΩ range.
• 3 Relative to external calibration source.
• 4 Tcal is the temperature at which the last self-calibration or external calibration was performed.
• 5 Using internal self-calibration; specifications valid over the entire operating temperature range.
• 6 With offset nulling.
• 7 With offset nulling; add 1.3 ppm of range for no offset nulling.
• 8 For inputs above 300 V, add 25 ppm × (Vin/1000 V)2 to the 90 Day and 2 Year columns.
• 9 Multiply the RMS noise value from the Additional Noise Error graph by the range-appropriate multiplier in this table. For the peak-to-peak noise error, multiply the RMS noise by 6.
• 10 Relative to external calibration source.
• 11 Tempco is the temperature coefficient.
• 12 90-day and 2-year specifications are typical.
• 13 To account for self-heating effects, for currents higher than 500 mA, add I2 * 75 ppm of reading to the specification.
• 15 For ranges ≥1 MΩ and relative humidity >80%, add 100 ppm/MΩ.
• 16 -10% to 0% tolerance.
• 17 Relative to external calibration source.
• 18 Tcal is the temperature at which the last self-calibration or external calibration was performed.
• 19 Tempco is the temperature coefficient.
• 20 Using internal self-calibration; specifications valid over the entire operating temperature range.
• 21 With offset compensated ohms enabled. For ADC calibration disabled, add 4 ppm of 100 Ω range and 0.4 ppm of 1 kΩ and 10 kΩ range to the 90 Day and 2 Year columns.
• 22 Perform offset nulling or add 1 ppm of range to the 24 Hr column and add 7 ppm of range to 90 Day and 2 Year columns.
• 23 Applies to 100 MΩ range up to 30 MΩ. 2-wire resistance measurement only. Use tempco outside 18 °C to 28 °C.
• 24 2-wire resistance measurement only. Use tempco outside 18 °C to 28 °C.
• 25 Typical specification.
• 26 Multiply the RMS noise value from the Additional Noise Error graph by the range-appropriate multiplier in the RMS Noise table. For the peak-to-peak noise error, multiply the RMS noise by 6.
• 27 -10% to 0% tolerance.
• 28 Up to 4.0 V measurement for 1 mA test current.
• 29 With high-order DC noise rejection; 100 ms aperture.
• 30 With normal DC noise rejection; 20 ms (16.67 ms) aperture.
• 31 After self-calibration. Measurement aperture greater than 4/fL, where fL is the lowest frequency component of the signal being measured.
• 32 Specification applies for DC coupling.
• 33 Applies to signals >1 mVrms.
• 34 Measurement aperture greater than 4/fL, where fL is the lowest frequency component of the signal being measured.
• 35 Specification is typical above 5 kHz.
• 36 Applies to signals >9 μArms and ≤1 kHz.
• 37 Sine wave only.
• 38 2 second gate time; input signal must be >10% of AC voltage input range.
• 39 0.00025% of reading, typical.
• 40 Tcal is the temperature at which the last external calibration was performed. For total measurement accuracy, add temperature probe error.
• 41 Tempco is the temperature coefficient, expressed in degrees of measurement uncertainty per degree change in DMM instrument operating temperature.
• 42 Using simulated reference junction.
• 43 Includes PXI-2527 with TB-2627 with a typical 0.5 °C CJC error and a typical thermal EMF offset of 2.5 μV for CJC temperatures between 15 °C and 35 °C. Add an additional 0.5 °C uncertainty when CJC is in the range 0-15 °C or 35-50 °C.
• 44 Based on RTD with RO = 100 Ω Pt3851 RTD in a 4-wire configuration, using lowest possible resistance range for each temperature. For total measurement accuracy, add temperature probe error.
• 45 For total measurement accuracy, add temperature probe error.
• 46 In parallel with 90 pF.
• 47 The AC coupling low frequency (-3 dB) point is 0.7 Hz.
• 48 The latency specification value actually reflects negative latency due to sampling before the trigger. Can be reduced to near zero (with the jitter specification) or made positive in software by adding a trigger delay.
• 49 Measurement Categories CAT I and CAT O (Other) are equivalent. These test and measurement circuits are not intended for direct connection to the MAINs building installations of Measurement Categories CAT II, III, or CAT IV.