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I want a data logger circuit to be designed. I want bidder to design the same and also deliver schematic software and quote separately for 1 or 2 sample prototype board as part of the project.
I want it to meet the following specs:
Input Connection: Pluggable terminal block for eight external channels
Internal Channel: On-board thermistor temperature (-40°C ~ 70°C, -40°F ~ 158°F)
Chanenls CH1: 0-100V DC, CH2: 0-50 mA, CH3: 0-100 mA, CH4: 4 - 20 mA, CH5: 4 - 20 mA, CH6: 0 – 10v DC, CH7: -4V to +4V DC - 20 mA, CH8: 0 – 300V AC
Accuracy: Thermistor:+/- 0.2°C(0°C ~ 70°C, 32°F ~ 158°F)
4 - 20mA channels: +/-0.15% FSR @ 25°C
+/-0.15% FSR @ 25°C from 2.5mA - 50mA
+/-0.5% FSR @ 25°C from 0 - 2.5mA
Overvcurrent Protection: up to +/- 100mA
Size: 4 Mega bytes (2MB readings)
Data Retention: Over 20 years
Sampling Interval: 20 milliseconds to 12 hours user selectable
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