1. Next Generation Calculator Measurements
Low Frequency Voltage, Current,
Temperature and Time (non-digital)
Richard J. Nelson
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2. Why Make Measurements? To determine current drain (Max, Min, & Avg)
To determine power required of battery (life)
To troubleshoot component failures (bad IC’s)
To confirm manufacturer’s specifications (if available)
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3. What is Measured? DC Voltages DC currents Resistances Temperature
All of the above over time
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4. What Instruments are Used?
DMMs with accessories
Oscilloacopes
Specialized devices (e.g. USB devices)
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5. Meter Generations – VOMs, DMMs
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6. Mooshimeter: No Controls No Display No (1) Indicators
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7. Here is what you get.
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8. From the PDF File in the References Section
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9. Inside the Semi-hard Carrying Case.
Three CAT III test probes.
Three probe tip to alligator adapters.
Mooshimeter.
No operators manual.
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10. Mooshimeter Advancements
Higher accuracy - <1%
Lower voltage burden – 20uv /mA = 0.02 ohms.
Lower power.
Higher resolution – 24 bits, 1 part in 16.7 million or 0.1 ppm.
Data recorder on micro sim card.
Lower cost (uses cell phone display, wireless).
Built in plotting capability.
Wireless (Bluetooth).
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11. Here are the general specifications.
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12. Range
Specs
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13. The Eight Parameters the Mooshimeter Measures
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14. Mooshimeter Electronics Heart
The input is a TI ADS pin, 24 bit, low power analog front-end for a portable Electrocardiogram System on a Chip. (A) on circuit board.
The communications function is a TI CC pin Bluetooth transceiver. (B) on circuit board.
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16. Convenience Test Fixture
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17. Temperature – Time Plot Example
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19. Conclusion The Mooshimeter is about the price of a quality DMM ($120)
The Mooshimeter is especially suitable for calculator measurements.
The Mooshimeter has about 2,000 users.
The documentation is minimal.
The software is like Prime, allways underdevelopment.
The Mooshimeter is powerful, but it has a steep learning curve.
The wireless data logging has lots of field applications (6 Mo. Data)
Two AA cells provide the power.
Circuit loading is very low.
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20. THE END
Thank You
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