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High Resolution Datalogger (DD-128)

DC/Current/Frequency/Status Recorder
24 Bit A/D
8 Channels
Low Power
Digital Communications
1 MB Non-Volatile Flash Memory
Universal Sensor Interface
 

Pump Station Monitoring
Strain Gauge Studies
Meteorological Studies
Interconnection Weir Monitoring
Wireless Datalogging
 

The Data Dolphin provides the accuracy of a laboratory instrument in the harsh conditions of the field environment. The ultra-high resolution 24 bit analog to digital section provides 8 single ended inputs or 4 differential bipolar inputs with resolution down to 90 nanovolts (.00000009 volts). This allows most sensors to be directly connected without any signal conditioning. Analog and digital filtering for these 8 inputs is provided. There are an additional four inputs that can be user selected as pulse, status, event start/stop or analog inputs.

Data is stored in a non-volatile flash memory module that gives long term storage without the fear of losing your data because of dead batteries. Data is stored inside a database structure, which allows you to add or delete inputs "on the fly" without having to restart the datalogger. Even the sample rate can be changed without restarting.

Designed for field use it’s operating temperature range goes from – 40°C to over 75°C and all inputs have static protection. It is powered internally by three "C" size alkaline batteries, however there is an adapter input for 120 VAC operation and an optional coin cell battery to keep the clock operating when the "C" battery pack is being exchanged. An external 12 volt source such as a rechargeable battery and/or solar panel can be connected.

The Data Dolphin’s extremely low operating current gives the datalogger an expected battery life of approximately 3 years (5 min sample rate).

Data collection, programming and viewing collected data is a breeze with the Data Dolphin Software. It allows you to view the current status, setup the logger, and generate graphs. You can also export your data to other programs for more detailed analysis and presentations.


DD-128   Specs   Literature   Software   Views
 
DD-128 Specifications

Analog Inputs
Differential Analog Channels:8
Maximum Input Voltage:-2.1 V to +2.5 V (0-20mA)
Analog Voltage Resolution:0.000,000,090 V
A/D Bits:24
Input Impedance:20 Gohm
Input Bias Current:+/- 9 nA
Scan Interval (c):1.88 to 101 Hz
Burst Mode:101.1 Hz
Excitation Channels:2
Excitation Voltage 1:+2500 mV
Excitation Voltage 2:+5000 mV
Digital Inputs/Outputs
Event or Pulse Channels:4
General Digital Ports:3 Input/Output
Power Requirements
Quiescent Current:50 uA typical
Processing Current:3 mA
Measuring Current:14 mA
Voltage Requirements:6 to 24 VDC
 
Memory
Removable Data Flash Memory:1 Mb Flash
Data Values Stored:360,448 (Input 1/No time)
Temperature Range
Standard:-40 to 60°C
Extended:-55 to 80°C
Dimensions
Size (Inches):8L x 3W x 3.5H
Size (cm):20.32L x 7.62W x 8.89H
Weight (Radio module, battery & antenna):0.918 kg (2.024 lbs)
Weight (Battery pack only):0.778 kg (1.715 lbs)
Weight (Alone):0.564 kb (1.243 lbs)
Computer Requirements
Computer:486 or higher
Operating System:Microsoft Windows 98, Me, NT, 2000, XP
RAM:16MB or higher
Monitor:VGA; SVGA recommended
Hard disk space:25MB install only; 35MB optimal

DD-128   Specs   Literature   Software   Views
 
Literature

Manuals
 Data Dolphin Software Manual (Revision: 1.3)
Tech Notes
 DD0101 - Connecting Temperature Sensors (Thermistor Type)
 DD0102 - Connecting a RH Sensor (Vaisala Humitter 50U/50Y)
 DD0103 - Connecting a Net Radiometer
 DD0104 - Connecting a Heat Flow Transducer
 DD0105 - Connecting a 4-20 mA Sensor
 DD0106 - Major Revisions to the DDSE Model in the Replacement Model
 DD0107 - Connecting a Rain Bucket Tipping Rain Gauge
 DD0302 - Replacing the Data Dolphin Internal Battery Pack
 DD0202 - Multidrop communications with the Data Dolphin Software
 DE0101 - Connecting a Strain Gauge in a Quarter Bridge Configuration
 DE0102 - Connecting a Type T Thermocouple

DD-128   Specs   Literature   Software   Views
 
Software

 Data Dolphin

DD-128   Specs   Literature   Software   Views
 
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DD-128   Specs   Literature   Software   Views
   
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