Measurement CIO-DAS-TC User Manual
CIO-DAS-TC
Specifications
Document Revision 1.1, February, 2010
© Copyright 2010, Measurement Computing Corporation
Specifications
A/D converter type
AD652 V/F converter
Number of channels
16 differential thermocouple inputs, 1 CJC input
Programmable ranges
2.5 V to +10 V, 20 mV to +80 mv, 15 mV to +60 mV, 6.25 mV to 25 mV
Voltage gains
1, 125, 166.7, 400
Thermocouple types
J, K, E, T, R, S, B
A/D pacing
Continuous conversions. Software-programmable for 50 Hz, 60 Hz, or 400 Hz
A/D trigger sources
Software-triggered
Data transfer
Single I/O register transfer through dual port RAM
Conversion rates (integrating
time)
50 Hz, 60 Hz, 400 Hz
Software programmable
*Conversion rates
(per channel)
25.0 msec @ 50 Hz typical, 25.5 msec maximum
21.6 msec @ 60 Hz typical, 22.1 msec maximum
7.4 msec @ 400 Hz typical,7.9 msec maximum
*This is the total time to convert the channel, process the data, and provide a
delay to switch the gain and channel.
Linearity error (A/D specs)
±0.05% @ 4 MHz clock
Gain drift (A/D specs)
±75 ppm/°C max
Zero drift (A/D specs)
±50 uV/°C max
Power supply rejection ratio
0.01 %/V
Overvoltage protection
40 V to +55 V
CMRR @ 60 Hz
80 dB minimum
Input leakage current
±80 nA maximum
Input impedance
100 MegOhm minimum
Absolute maximum input
voltage
40 V to +55 V
Isolation to PC
500 V min through DC/DC converter and opto-isolators
Gain
Range
Accuracy (Worst Case)
Resolution
@ 50 Hz
@ 60 Hz
@ 400 Hz
1
2.5 to 10 V
±0.01% of reading ±2.5 mV
312.5 µV
375 µV
2.5 mV
125
20 to 80 mV
±0.01% of reading ±20 µV
2.5 µV
3.0 µV
20.0 µV
166.7
15 to 60 mV
±0.01% of reading ±15 µV
1.88 µV
2.25 µV
15.0 µV
400
6.25 to 25 mV
±0.02% of reading ±6.25 µV
0.781 µV
0.938 µV
6.25 µV
Typical for 25 °C unless otherwise specified.
Specifications in italic text are guaranteed by design.
Analog input
Table 1. Analog input specifications
Accuracy and resolution
Table 2. Accuracy and resolution (voltage measurements)
1
Loading...