Ionics Instruments 2004 Page 3-8 DLM 30007-08 Rev. A
Microprocessor Controller and Electronics
All operations of the analyzer are controlled by a 32-bit microprocessor. Nine
electronic boards are contained in the analyzer:
Two power supply boards
Two conductivity and temperature-measurement headboards,
Main microprocessor/memoryI/O board (which includes the printer output and
RAM card)
Analog to digital board
Syringe pump control board
Display and keypad board
On-board Data Storage
The date, time, TOC, IC, acid flow rate, oxidizer flow rate, and conductivity
temperatures are stored on the Ram Card after each TOC measurement. The
standard RAM card included in the analyzer has 512K capacity, which can
store ~102 days of continuous measurements. Once the RAM card is full, the
analyzer’s firmware notifies the user that it is overwriting data. Larger-capacity
RAM cards are available (up to 2048K or ~400 days) and new RAM cards can
be installed if archiving data on the cards.
Please note, these RAM cards are battery-operated; when the battery is
depleted the stored data will be lost. The battery is not depleted when the
RAM card is in an operating TOC analyzer. When the card is removed or the
analyzer is turned off the battery will start to deplete. The battery in a 512K
card lasts about 2 years and the battery in a 2048K card lasts ~1 year in
storage, outside the analyzer.
To download the information to a PC for further processing, analysis, and data
storage, remove the RAM card from the analyzer and read the data with a
RAM card reader and the RAMReader program. RAMReader produces a file
that can be used with Lotus 1-2-3, Excel, and other spreadsheet programs.
Error messages and calibration constants are stored in nonvolatile memory in
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