Agilent Technologies U2802A - Manual (Page 31)

Features and Functions 2
Agilent U2802A 31-Channel Thermocouple Input User’s Guide 21
Theory of Operation
Functionality of the System
Figure 2-2 System functionality block diagram for U2802A
13 Thermocouple voltage signals are detected at the U2802A thermocouple
inputs.
14 Signal is amplified with a gain of 97.673 by the U2802A.
15 The U2355A or U2356A DAQ converts the analog voltage signals to
digital voltage readings.
16 The AMM software (or IVI- COM driver) reads the Gain and Offset
calibration constants from the U2802A EEPROM via the DAQ DIO lines.
The digital voltage readings will be calibrated based on these constants.
17 The AMM software (or IVI- COM driver) converts the calibrated voltage
readings to temperature readings using the ITS- 90 conversion
polynomials.
U2802A_UG.book Page 21 Friday, November 25, 2011 10:57 AM