DT51 Datataker Data Logger

• General Purpose Low Cost Data Logger
• 1-3 Sensor Channels, 7 Digital Channels
• Easily Configurable Windows Based Software
• Stand Alone and Real Time Data Acquisition
• Remote Monitoring and Control
• PC Card for Data Storage
• Unique Universal Channels
• Removable Screw Terminals

Datataker's DT51 General Purpose Low Cost Unit
The DT51 is a general purpose low cost data logger. The DT51 features 5 to 10 analog channels depending on sensor type, five digital input channels, 3 high speed counters and sampling speed of 25 samples per second.
Data can be conveniently and securely stored in battery backed RAM and removable PC cards; the latter providing storage for up to 1,390,000 readings. Alarms may be set for all channels.The DT51's rugged steel construction makes the unit suitable for harsh environments.

Datataker's Windows Based Software
The dataTaker Software Suite is provided, including packages allow you to easily program the DT51.
DeLogger, with it's graphical programming interface provides trend plots, spreadsheet and visual instrument display. DeTransfer facilitates text based programming, and trend plots via DePlot.

Datataker's Extensive Range
Datataker's extensive range of data acquisition and data logging systems are real time and stand alone, able to acquire, process and log data without direct computer control. The powerful yet easy-to-use hardware and software enables you to log a wide range of measurements and events.
More than 30,000 dataTakers are in use in over 55 countries - dataTakers are used in many applications including science, aerospace, mining, manufacturing, meteorology, agriforestry, hydrography, petrochemical, research & development, public utilities and transportation.

Applications for the dataTaker DT51 include:

• Fault Finding
• Process Monitoring
• Building Monitoring
• Automotive Testing
• Product Testing
• Research & Development
• Flood Warnings
• Monitoring Climatic Conditions
• Monitoring Water Levels
• Machine Down Time Monitoring

  Larger picture showing connections

Analog Channels
Number of input channels depends on sensor wiring configuration. Sensor configurations may be mixed:
Two wire: 1
Two wire with one terminal shared (common): 3
Three wire: 1
Four wire: 1
4-20mA current loop: 1 using internal 100ohm shunt,
3 more by adding external shunts (shared common).

Sensor Excitation
Each channel: 4.5V (1kohm source), 250µA or 2.5mA
switched on when channels is selected
DC Voltage: 5V at 100mA (max.) switched

Multiplexer (Channel Selector)
Type: solid-state ±5V input protection
Input impedance: 1Mohms or >100Mohms, programmable
Common mode range: ±3.5V

Internal Channels
Temperature (thermocouple reference junction): 1
Reference voltage channels: 1
Internal battery voltage: 1

Sampling
Sampling for accuracy and noise rejection by integrating over 50/60Hz line period.
Maximum sample speed: 25Hz
Effective resolution: 15 bits
Linearity: 0.01%
Common mode rejection 25mV range: >90dB
Line (50/60Hz) series mode rejection: >35dB

Sensor Support

Supports a wide range of sensors types including, but not limited to the following:

Thermocouples
Types: B, C, D, E, G, J, K, N, R, S, T
Reference junction compensation accuracy:
At case temperature 25°C: ±1.0°C       
At case temperature range -20° to +60C: ±1.5°C

RTDs
Types: Pt (385 & 392), Ni, Cu
Resistance range: 10ohms to 2kohms
Measurement accuracy:4 wire: 0.15% of resistance value
3 wire: 0.25% of resistance value

Thermistors
Types: YSI 400xx Series
Resistance range: <7kohms,
<20kohms with parallel resistor

Monolithic Temperature Sensors
Types supported: LM335, LM34, LM35, AD590

Bridge Sensors
Configurations: 4-wire and 6-wire
Excitation: voltage or current
Bridge completion: external or internal half bridge

4-20mA Current Loops
Shunt value: 100ohms to a shared common
Accuracy: 0.25% at 25°C

Sensors - Comments
A wide range of sensor scaling and linearizing facilities are provided including polynomials, expressions and functions

Digital Channels
Bi-directional channels: 4
Dedicated counter channels: 3
Digital Inputs:   4, shared with bi-directional channels
  Input Type: logic level (protected with pull-up)
Counter Channels:  4 low speed (10Hz) shared with bi-directional channels,
3 high speed (1kHz, sleep mode) with switchable internal clocking options,   Size: 16 bit (65535 counts)
Digital Outputs:  4,   Output type: open-collector npn transistor,     Rating: +30V, 100mA

Calculation Channels
Any expression involving variables and functions including: sin(), cos(), tan(), asin(), acos(), atan(), abs(), sqrt(), average, maximum, minimum, time of max., time of min., variance, integral, histogram

Scheduling of Data Acquisition
Number of schedules: 4 acquisition schedules, 1 immediate schedule, 1 alarm schedule
Scan triggers: time base or digital event
Conditional scanning: while digital input high
Time based scheduling: from seconds to months in increments of 1 second, 1 minute, 1 hour and 1 day
Maximum scheduled rate: 1 second or as fast as possible, typically 25 samples per second
Dynamic scan time base change: yes
Maximum number of channel entries: 110

Alarms
Condition: high, low, within range and outside range
Delay: optional time period for alarm response
Actions: set digital outputs, execute any dataTaker commands.
Alarms can be combined in a logical fashion.

Data Storage
Internal: 166,500 data points (battery backed internal SRAM).

PC Card (PCMCIA Card) Unlike the other Datatakers,
DT51 has no PCMCIA card slot for memory expansion.

Data format: proprietary,     
Download Data Format:  ASCII floating point, fixed point or exponential formats
Compatibility: spread sheets, word processors, graphing packages, statistical programs and SCADA software

Serial Interface (RS232)
The DT51 is programmed and data extracted via the RS232 serial interface
Speed: 300 to 9600 bps (9600 default),
Handshake: XON and XOFF
Wake from sleep: yes       
Isolation: 500V
Compatibility: computers, modems, satellite-modems, radio-modems and printers

System

Processor type: Z180, 18 MHz
Program storage: FLASH
Data storage: SRAM, battery backed
Indicator LED: sampling
Real Time Clock
For time stamping of data, scheduling and timers
Normal resolution: 1 second
Accuracy: 2 seconds per day (25°C)
Power Supply
Voltage range: 11 to 24Vdc, or 9 to 18Vac
External battery input: 6V lead acid
External solar panel: 12V (0.4 x 0.4m typical size)

Power Consumption
In normal mode: 1W (2W with ext. battery charging)
Sleeping: 2mW (350µA from 6V battery)
Typical low power operation: 20mW
External Battery (recommended)
An external battery can be connected for stand-alone logging.
6V lead acid gel cell, charged via the logger when mains adaptor or other supply is connected.
Maximum charge current: 200mA
Temperature compensation charging: –10°C to +70°C
Operating time with 1.2AHr battery: Normal: approx. 10 hours
  Low power: approx. 4 months
Internal Backup Battery
For real time clock and internal data storage backup
Type: 3V 1/2AA Lithium

Physical and Environment
Powder coated fabricated steel.
Dimensions: 260 x 110 x 55mm.
Weight: 1.5kg (2.5kg shipping)
Environment temperature range: –45°C to 70°C
Humidity: 85%, non-condensing

Accessories Included
Line adaptor: 110/240Vac, 500mA
Comms cable: for PC
Software: Software Suite CD which includes DeLogger, DeTransfer, DePlot applications
Manuals: "Getting Started with dataTaker"
and  "dataTaker Manual"

DeLogger™4 Pro Software (included)
Graphical programming and supervision software. Supports a large network of DT50, DT51, DT500 and DT800 Series units connected via modem. Features include comprehensive plotting, reporting, mimics, database, web publishing and other powerful capabilities.

Optional Accessories
Portable Carrying Case (PE)
Capacity: 1 DT51 unit + Battery
Environmental protection: IP66

Battery    for mounting external to the DT51
GC-1.2: 1.2AHr or GC-4: 4AHr