Specifications

MAINTENANCE and SERVICE
Figure 5-9. ADIO Block Diagram
5.6.2.1 Automatic Calibration
The ADIO board features automatic calibration of both analog inputs and outputs for
enhanced accuracy and reliability. The potentiometers, which are subject to tampering
and vibration, have been eliminated. Instead, all A/D calibration adjustments are
performed using an octal 8-bit DAC. The DAC values are stored in an EEPROM and are
recalled automatically on power up. The board includes three precision voltage
references for negative full scale, zero, and positive full-scale. A calibration utility
program provided with the board allows you to recalibrate the board anytime, in both
unipolar and bipolar modes, and store the new settings in EEPROM.
Autocalibration applies to the 4 D/A channels as well. The full-scale D/A range is
selected with a jumper block. The analog outputs are fed back to the A/D converter so
they can be calibrated without user intervention. Again, calibration settings are stored in
EEPROM and automatically recalled on power-up.
5.6.2.2 Analog Inputs
The ADIO board provides split configuration capability, with more total input channels
than any other PC/104 analog I/O board. The board can be user-configured in any of
three ways:
Channels
Format
32 32 single-ended
24 8 differential, 16 single-ended
16 16 differential
Rosemount Analytical µCEM Continuous Analyzer Transmitter 5-10