PDAS-III
AMASSER
Pliant Data Acquisition System
Pliant : readily yielding to influence
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- Standard Hardware Features
- Standard Firmware Support
- Specifications
- Hardware Options
- Combo Data Loggers
- US Price List for Environmental Products
PDAS-III Data Loggers
The PDAS-III data loggers feature a built-in menu system which may be accessed directly from your PC, or via modem, or even GOES telecommunications using SAT-HDR high-data-rate transmitter. Firmware upgrades are easily accomplished directly from your PC without having to change any internal parts. The PDAS-III is your solution for a reliable, easy-to-use yet highly capable platform for amassing data. No custom software is required for the PC. In fact, the built-in menu system only requires a basic communications package or simply a dumb terminal emulator (eg. Hyperterminal) and is not OS dependent (Windows, QNX, Unix, …).Our High-Level model, the PDAS-III, is equipped with the hardware and firmware features listed below and also comes with a number of Hardware and Firmware options which allow you to create a logger to suit your needs.
Standard Hardware Features:
- Two master SDI-12 Serial Digital Interface (20 sensor support) ports labeled Channel A and B
- RS-232 Programming Port programmable from 300 to 19200 baud
- Auxiliary Communications Port for GOES and/or Modem support programmable from 300 to 19200 baud
- 1 Mbyte Non-Volatile Flash memory Log File providing 32,768 records (32 byte records)
- 1 switched +12VDC port for sensor activation
- Event & time based data acquisition with a multi-tasking OS
- Low power consumption through the use of power-down mode
- Lithium Battery for RTC and 32 kbyte RAM
- Real Time Clock for date/time stamping of instantaneous, average and minimum/maximum sensor data
- A +10.5 to 15VDC input for external battery, charger or solar panel
- Detachable terminal strip for connection of SDI-12 and analog sensors
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Description |
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8-channel on-board Analog Input System for monitoring
the following maintenance parameters:
Outputs of 2.5 & 5V reference and a 100 microAmp constant current source. Includes 2 event counters. Outputs and inputs are provided by means of the detachable terminal strip pictured above. |
Standard Firmware Support:
- Firmware support for modem communications via the auxiliary comm port.. Internal environmental voice modem (option /PMDM/V) also available.
- Sensor Log Set-up Table with 16 sensor slots for the attached SDI-12 and analog sensors
- Individual sensor setup for:
- User defined sensor Label
- Sample period setting ( minutes : seconds )
- Command string for measurement initialization of SDI-12 sensors
- Linear and Non-Linear (up to 6th order polynomial) conversion equations
- Instantaneous or averaged log value (record period in hour : minutes)
- Minimum, maximum log record period (hour : minutes)
- Sensor sample Start Time ( hour : minutes )
- 32,768 log records, each 32 bytes in length containing
- Date Stamp; Time Stamp
- User-defined Sensor Label
- and Sensor Data
- View Data Facility ( selected sensor data written to Host Terminal at a user-defined rate, real-time )
- User-selectable data formats for log retrieval: Sequential or Tabular with user-defined character delimiter
- PDAS firmware support for ALARM functions which have the ability of triggering a new logging rate or reading another sensor.
- SDI-12 Transparent Mode ( Manual SDI-12 Communications)
- Master SDI-12 task engine, auto retries, auto data buffer retrieval & auto command time-outs
- ADBus Host Protocol:
- 256 byte messages
- SDI-12 Transparent Mode Support
- Data Log Retrieval through standard Comm Packages (eg Procomm) or with any dumb terminal emulator with capture capability
- Fully ASCII Character Based Adaptive File System, No set up needed
- Flexible Real Time Viewing and Setup of sensors & Flash Data Log
HARDWARE OPTIONS
The following summarizes the hardware options of the PDAS-III:| Part # | Description | |
| /PSE | Built-in PSE-SDI shaft encoder (combo data logger) which includes: optical shaft encoder with L-S compatible clamp assembly, 9V battery backup, EEPROM for address, position & scale settings and AMASSER SDI-12 Compatible Firmware. The resolution is 1/400th of a revolution. An adaptive sampling technique enables minimal power consumption. Refer to our Price list. | 
PDAS-III/PSE |
| /PSE/D | Built-in PSE-SDI/D (combo data logger). This is the PSE-SDI shaft encoder described above with optical 8-digit display and operator interface switches and AMASSER SDI-12 Compatible Firmware. Refer to our Price list. |
PDAS-III/PSE/D |
| /PMDM | Built-in PMDM Environmental Modem. Refer to our Price list. | |
| /PMDM/V | Built-in PMDM/V Environmental Voice Modem. Refer to our Price list. |  |
| /HDR | Built-in SAT HDR GOES transmitter. Refer to our Price list. |  |
SPECIFICATIONS
Processor - Atmel 89S8252 @ 11.0592 MHz.Internal RAM - 256 bytes RAM
External Memory
site 1 - Data space: 4 slots of 32 kbytes SRAM (Li bat backup)
site 2 - Code space: 2 slots of 64 kbytes SRAM (Li bat backup)
sites 3&4 - 1 Mbyte non-volatile flash (32768 records)
Connectors
- 9 pin DB9S comm connector (RS-232) for direct communication to your PC (cable supplied)
- 15 pin DB15P comm for modem and GOES (modem and GOES cables are charged extra)
- Detachable terminal strip for SDI-12 ports, analog inputs, outputs and event counters
- optional terminal strip for expanded terminal connections
Primary voltage: (0-20V)
Lithium battery voltage (0-5V)
Internal temperature
9V bat. Voltage (0-20V) with PSE/D
Four Ext. Voltage Inputs, user-configurable to the following ranges:
- +/-100mV,
- 0-1V,
- 0-2.5V and
- 0-5V
AIS Output
2.5V and 5V reference
100 microAmp current source
Real Time Clock
Motorola, adjusted to +/- 15ppm per year
Lithium battery backup
Battery Backup
Standard CR2032 3VDC Lithium battery for RTC and RAM backup (date,
time, unit no., site description, sensor setup).
Event Counter Input
2 ports supplied with AIS
(2 add. Ports obtainable with PSE /D)
20 msec closure
Resolution - 16 bit
Rollover or Reset selectable
Pulse or Switch Closure selectable
Power Consumption
< 8 mA w/o comm port connected
< 30 mA w/ comm port connected
Maximum current : < 30 mA
Environmental Characteristics
Operating : -40 to +85 C
Storage : -60 to +100C
Humidity : <= 100% non-condensing
Physical Characteristics
Standard models
Height - 165.0 mm. (6.5 in.)
Width - 228.6 mm. (9.0 in.)
Depth - 70.0 mm. (2.75 in.)
Mounting brackets with four #10 holes
Combo models (built-in shaft encoder)
Height - 165.0 mm. (6.5 in.)
Width - 290 mm. (11.4 in.) incl. shaft
Depth - 70.0 mm. (2.75 in.)
Mounting brackets with four #10 holes
The above information is believed to be true at the time of printing. AMASS Data Technologies Inc. reserves the right to modify specifications without notice. All trademarks are owned by their respective companies.
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