Ultra-Accurate Measurement
for Temperature and Voltage
MEASURpoint™ is an ultra-accurate instrument formeasuring any combination of thermocouple, RTD, andvoltage inputs. MEASURpoint is available as a USB or
Ethernet (LXI™ Class C compliant instrument).
MEASURpoint includes the QuickDAQ application toconfigure and acquire temperature, resistance, andvoltage channels, and to display, log, analyze, and export
data to other formats including Excel.

Key Features• Dedicated 24-bit: Delta-Sigma ADC/ch• 8DI to 48DI simultaneous analog inputs• Sampling rates: up to 10 Hz/ch• Software selectable ranges of ±10 V and ±60 VDC(±30 VAC) on voltage boards• 30 VAC, 60 VDC continuous functional isolationch‑ch and ch-gnd, verified by a 500 Vpk withstand• Auto-calibrating front-end: resets the zero point oneach power-up• Measurement Instrument Calibration Utility: allows
in-field calibration• Digital I/O: 8 in/8 out• Packaging options: compact, rugged 2U, half-rackenclosure.
• Thermocouple Input channel Features:• Voltage input range: ±75 mV• Dedicated CJC (cold junction compensation)
input for each thermocouple channel• Supports B, E, J, K, N, R, S, and T thermocouple
types• Break-detection circuitry: detect openthermocouple inputs• RTD Input channel Features:• Voltage input range: ±1.25 V• 4-wire, 3-wire, or 2-wire PT100, PT500, andPT1000 RTDs supported

MEASURpoint is an ultra-accurate instrument for measuring
any combination of thermocouple, RTD, or voltage inputs
with the QuickDAQ application. Available for USB orEthernet.

• MEASURpoint Software Features• QuickDAQ: Acquire and display from all Data
Translation USB and Ethernet devices that
support analog input streaming. Acquire data,
record data to disk, display the results in both aplot and digital display, and read a recorded data
file. Two additional options can be purchased toadd FFT analysis capabilities to the base package.
Also, data can be exported to other applications
like Microsoft Excel® and MATLAB® for moreadvanced analysis• IVI-COM driver: Works in any development
environment that supports COM programming,
including Visual Basic®, Visual C#® .NET,MATLAB®, VEE Pro, NI LabVIEW® orLabWindow, and others• SCPI support (DT8874 only): SCPI (StandardCommands for Programmable Instruments) is auniversal programming language for electronic
test and measurement instruments, based on theIEEE 488.1 and IEEE 488.2 standards

Features Summary
DT9874/DT8874
Channels# of Channels (max)Supported Operating Systems

48Sensor
Thermocouple

Types B, E, J, K, N, R, S, T

RTD

4-, 3-, 2-wire — PT100,PT500, PT1000

VoltageCJC Configuration• Windows® 10/8/7/Vista®/XP 32/64-bit±75 mV, ±1.25 V,±60 VDC (±30 VAC), ±10 V
CJC per chAll systems have 10 Hz/channel throughput rate and use ahigh stability 24-bit delta-sigma A/D per channel.
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Analog Input FlexibilityTriggers

The MEASURpoint instrument provides up to 48
configurable channels (depending on the model),allowing for ultimate flexibility with thermocouple, RTD,and voltage inputs. Because MEASURpoint architectureuses an A/D per channel, sampling rates of up to 10 Hz
per channel simultaneously can be achieved.

A trigger is an event that occurs based on a specified setof conditions. Acquisition starts when the instrument
detects the initial trigger event and stops when thebuffer has been filled or you stop the operation.
MEASURpoint instruments support a software trigger
and an external trigger on digital input line 0.

The RTD input channels provide a 4-wire RTD input with
Kelvin sensing for maximum accuracy by eliminating
errors due to wire resistance. You can attach a voltage
input or any of the following RTD types to these channels
in a mix and match fashion: Platinum 100 Ω (Pt100),Platinum 500 Ω (Pt500), or Platinum 1000 Ω (Pt1000)
RTD using an European alpha curve of 0.00385 oran American alpha curve of 0.00392. The supported
temperature measurement range for these RTD types
is –200 °C (–328 °F) to 850 °C (1562 °F). You can alsomeasure a resistance value in Ohms, if desired. The
analog input range is ±1.25 V.

Digital Input/Output Lines
MEASURpoint instruments feature eight, isolated, digital
input lines. The digital input lines operate from +3 to+28 VDC, with a switching time of 2 ms maximum.
MEASURpoint instruments are perfect for driving relays
directly, featuring eight, isolated, digital output lines. Theoutputs are solid-state relays that operate at ±30 V and
400 mA peak (AC or DC) with a 2 ms max switching time.

High-Stability, Low Drift Voltage References
MEASURpoint uses high-precision, high-stability, lowdrift voltage references rated at 4 PPM per degree and
100 PPM drift per year. This means MEASURpoint isaccurate now and will remain that way over time.

CJC Circuit
Thermocouples are “relative” not “absolute” temperature
measuring devices that generate voltage as a functionof the temperature difference between both ends. TheDT9874 and DT8874 incorporate an independent CJC
circuit for every channel. The board-level CJC is embedded
in a metal bar for excellent thermal conductivity andoptimum consistency.

x20
CJC*LANLED

2.5 Hz Filter

Control
FPGA
Ethernet

Isolation Barrier

Isolated
DC-DC

ENet
Link
LEDENetActivity
LEDLAN
LED

Sense
Return1 of 8
Digital Input
Isolators
1 of 8
Digital Output
Isolators

24-BitA/D24-Bit
A/D-64 kB
SRAM

Isolated
DC-DC

ThermocoupleChannel+425 µA
Current Source+

Our custom DC-DC converters circuits have a uniquepower distribution system that supplies power to only
2 of the 6 boards at any one time. Cycling non-adjacentboards in this manner creates less power surges, reduces
noise, and improves the overall system performance.
37-Pin D-Shell
Connector+10 nA Break
Detection

Custom Designed DC-DC Converters

EmbeddedController

RTD Channel

Power LED
USB LED**
Limit LED+1Ω-

2.5 Hz Filter

Open TC LED**

ID ROM24-Bit
A/D1MΩ
SenseReturnBlock Diagram

Isolated
DC-DCVoltage ChannelCalibrationROM*CJC per channel**Not used on LXI instruments.

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Key FeaturesIsolation• QuickDAQ Base Package (Free)• Ready-to-measure application software• Configure, acquire, log, display, and analyze data
• Customize the acquisition, display, and recording
functions to suit your needs• FFT Analysis Option (License Required)• Includes all QuickDAQ Base Package features• Perform single-channel FFT operations• Configure dynamic performance statistics• Supports Hanning, Hamming, Bartlett, Blackman,Blackman Harris, and Flat Top response windows• Advanced FFT Analysis Option (License Required)• Includes all the features of the QuickDAQ BasePackage and FFT Analysis Package• Perform 2-channel FFT operations• Supports real, imaginary, and Nyquist display
functions• Additional FFT analysis functions supported:
Exponential, Force, Cosiner Taper• Save data to .uff file format

MEASURpoint instruments provide channel-to-channel
functional isolation of 60 VDC maximum continuousworking voltage, meaning that each input can bereferenced to 60 VDC maximum, with a 500 Vpkwithstand rating, verified by a 5 s dielectric withstandtest. By providing isolation, MEASURpoint instruments
minimize common-mode noise and ground loop
problems to preserve accuracy for all sensor inputs.
This is especially useful when conditions change in theelectrical environmental due to motor current surges,
electromagnetic radiation, or noisy industrial equipment
turning on/off.

Field Calibration
Users can calibrate any MEASURpoint instrument in
the field using precise calibration equipment and theMeasurement Instrument Calibration Utility. This freeutility allows you to revert to the factory calibration
for any or all channels, or revert back to the last user
calibration values, if desired. In addition, this utility
generates a report that lists the starting and ending
calibration values for each channel, allowing traceability.

Remote Measurements
The network-ready versions of MEASURpoint are LXI™
Class C compliant and provide a standard Ethernet
connection to support remote monitoring and control
from the field or on the factory floor. Channels can be
expanded by adding more instruments to the network.

QuickDAQ
QuickDAQ allows you to acquire and display from all
Data Translation USB and Ethernet data acquisition
devices that support analog input streaming. Combine
QuickDAQ with Data Translation hardware to acquiredata, record data to disk, display the results in both a plot
and digital display, and read a recorded data file.

QuickDAQ ships free-of-charge and allows you to get up andrunning quickly.

Be productive right out of the box with this powerfuldata logging software. Data can be exported to otherapplications like Microsoft Excel® and Mathworks
MATLAB® for more advanced analysis. Two additional
options can be purchased to add FFT analysis capabilities.

The main web page displays information about yourEthernet instrument on the network and allows you toconfigure device settings.

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Additional Software Support

Ordering Summary

The following software support is available for all MEASURpoint
instruments:• Measurement Instrument Calibration Utility – The calibration utility
allows you to calibrate a MEASURpoint instrument in the field. Using
this utility, you can revert to the factory calibration for any or allchannels, or revert back to the last user calibration values, if desired.
In addition, this utility generates a report that lists the starting andending calibration values for each channel, allowing traceability.
• Eureka Discovery Utility (DT8874 only) — This utility helps you locateor “discover” all LXI (Ethernet) instruments that are connected to yoursystem and provides the following information about your instrument:
the IP address, manufacturer, model number, serial number, andversion of the firmware that is running on your instrument. In addition,
you can use this utility to configure Windows firewall settings andupdate the firmware for your Data Translation LXI instrument.
• Instrument Web Interface (DT8874 only) — This built-in interface
allows you to configure your instrument with Internet Explorer.
• IVI-COM Driver — This driver is provided to write application programsfor MEASURpoint using an IVI-COM instrument interface. It can beused with programs written in Visual C#®, Visual Basic® for .NET, orC++ under Visual Studio® 2003 to 2012. You can also use the IVI‑COM
driver with LabVIEW® from National Instruments or MATLAB® andthe Instrument Control Toolbox from MathWorks™ to programMEASURpoint instruments.
• SCPI Commands (DT8874 only) — Use VISA or network sockets toprogram and control MEASURpoint LXI instruments by sending
SCPI commands. Refer to the SCPI Programmer’s Manual for LXI
Measurement Instruments (UM-23650) for information on the
supported SCPI commands and example programs.

HARDWARE• MEASURpoint Ethernet Instruments
Refer to www.mccdaq.com/Products/
MEASURpoint-TemperatureInstruments/DT8874-MEASURpoint• MEASURpoint USB Instruments
Refer to www.mccdaq.com/Products/
MEASURpoint-TemperatureInstruments/MEASURpoint
ACCESSORIES• STP37 - Digital I/O screw terminal panel• EP373 – Single Rack-Mount Kit for DT9874/
DT8874• EP374 – Dual Rack-Mount Kit for DT9874/
DT8874
FREE SOFTWARE• QuickDAQ
OPTIONAL SOFTWARE• QuickDAQ FFT Analysis Option (LicenseRequired)• QuickDAQ Advanced FFT Analysis Option(License Required)

MEASURpoint Instruments
DTx874–xxT -xxR-xxV

8 = Ethernet
9 = USB

T = Thermocouple Channels
R = RTD Channels
V = Voltage Channels
00 = No Channels
08 = 8 Channels
16 = 16 Channels
24 = 24 Channels
32 = 32 Channels
40 = 40 Channels48 = 48 Channels

Options

MEASURpoint Instruments with
Rack Mount Kit• STP37 – Digital I/O screw terminal panel• EP373 – Single Rack-Mount Kit for DT9874/DT8874• EP374 – Dual Rack-Mount Kit for DT9874/DT8874(508) 946-5100

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March 2019. Rev 12
MEASURpoint-Datasheet© Measurement Computing Corporation