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Datalogger circuit
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Engineering & Manufacturing > Electrical

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  • Posted: Sun, May 05, 2013
  • Time Left: Closed
  • Location: Anywhere
  • Client prefers freelancers from:
    Anywhere

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    a different location.

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  • Start: Immediately
  • Budget: $300 or less
  • Fixed Price Job
  • Elance Escrow Protection
  • W9 Not Required
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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:

Inputs

Input Connection: Pluggable terminal block for eight external channels
Internal Channel: On-board thermistor temperature (-40C ~ 70C, -40F ~ 158F)



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
Resolution: 0.00%
Accuracy: Thermistor:+/- 0.2C(0C ~ 70C, 32F ~ 158F)
4 - 20mA channels: +/-0.15% FSR @ 25C
50mA channels:
+/-0.15% FSR @ 25C from 2.5mA - 50mA
+/-0.5% FSR @ 25C from 0 - 2.5mA
Overvcurrent Protection: up to +/- 100mA



On-board Memory:

Size: 4 Mega bytes (2MB readings)
Data Retention: Over 20 years



Sampling:

Sampling Interval: 20 milliseconds to 12 hours user selectable
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Job ID: 41139161
Proposals
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  • Submit Date (Latest)

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