Features

• 2 Mbytes standard memory

• I/O and RS-232 serial ports

• 13-bit analog to digital conversions

• 16-bit H8S Hitachi Microcontroller with 32-bit internal CPU architecture

• Temperature compensated real-time clock

• Single DAC used for excitation and measurements to give ratio metric measurements

• Gas Discharge Tube (GDT) protected inputs

• Data values stored in tables with a time stamp and record number

• Battery-backed SRAM memory and clock ensuring data, programs, and accurate time are maintained while disconnected from its main power source

• Measures intelligent serial sensors



Storage Capacity

1 Mbyte of FLASH memory for the Operating System.

2 Mbytes battery-backed SRAM for CPU usage, program storage, and data storage. Data is stored in a table format. Storage capacity can be increased by using a CompactFlash® card.

12 Vdc source; SI-5 typically uses a sealed rechargeable battery that can be float-charged with a solar panel or ac power.



Datalogger Programming

The onboard, BASIC-like programming language supports data processing and analysis routines. An intuitive GUI is provided for user interface.

Input Output Terminals

Analog Inputs: Eight differential (16 single-ended) channels measure voltage levels. Resolution on the most sensitive range is 0.67 µV.

Pulse counters: Two pulse channels can count pulses from high level (5 V square wave), switch closure, or low level ac signals.

Switched voltage excitations: Three outputs provide precision excitation voltages for resistive bridge measurements.

Digital I/O ports: Eight ports are provided for frequency measurements, digital control, and triggering. Three of these ports can also be used to measure SDM devices.

Switched 12 Volt: This terminal provides unregulated 12 V that can be switched on and off under program control.

RS-232 port: A PC or laptop can be connected to this 9-pin port via an RS-232 cable.

I/O port: Data transfer peripherals that require power from the datalogger can be connected to this port via a cable.

Peripheral Port: One 40-pin port interfaces with the CompactFlash® module.

Operational Temperature: -25° to +50°C; an extended range of -55° to +85°C is available.

Communications

Compatible telecommunication options include Ethernet, phone modems (land-line and cellular), radios, short haul modems, GTX-1.0 GOES satellite transmitter, and multidrop modems. Real-time and historical data can be displayed on-site using a Palm OS-based PDA (requires PConnect 3.1), or a PC. The PC connects to the SI-5 via an RS-232 cable, or if optical isolation is required, via the I/O port and SC32B interface. Customers can transport programs/data to a PC via CompactFlash® cards.



Channel Expansion

Synchronous Devices for Measurement (SDMs) are addressable peripherals that expand the SI-5’s measurement and control capabilities. For example, SDMs are available to add control ports, analog outputs, pulse count channels, interval timers, or even a CANbus interface to a system. Multiple SDMs, in any combination, can be connected to one SI-5 datalogger.



Multiplexers

Multiplexers increase the number of sensors that can be measured by a SI-5 by sequentially connecting each sensor to the datalogger. Several multiplexers can be controlled by a single SI-5. The SI-5 is compatible with the AM16/32 and AM25T.