Transcript Next_Generation_Calc..

1
Next Generation Calculator
Measurements
Low Frequency Voltage, Current,
Temperature and Time (non-digital)
Richard J. Nelson
HP Handheld Conference 2016
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)
HP Handheld Conferenc 2016
2
What is Measured?
• DC Voltages
• DC currents
• Resistances
• Temperature
• All of the above over time
HP Handheld Conferenc 2016
3
What Instruments are Used?
• DMMs with accessories
• Oscilloacopes
• Specialized devices (e.g. USB devices)
HP Handheld Conferenc 2016
4
Meter Generations –
VOMs, DMMs
HP Handheld Conferenc 2016
5
Mooshimeter:
No Controls
No Display
No (1) Indicators
HP Handheld Conferenc 2016
6
Here is
what you
get.
HP Handheld Conferenc 2016
7
From the PDF File in the References Section
HP Handheld Conferenc 2016
8
Inside the Semihard Carrying
Case.
1. Three CAT III test probes.
2. Three probe tip to alligator adapters.
3. Mooshimeter.
4. No operators manual.
HP Handheld Conferenc 2016
9
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).
10
HP Handheld Conferenc 2016
Here are the
general
specifications.
HP Handheld Conferenc 2016
11
Range
Specs
HP Handheld Conferenc 2016
12
The Eight Parameters the Mooshimeter Measures
HP Handheld Conferenc 2016
13
Mooshimeter Electronics Heart
• The input is a TI ADS1292 32 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 CC2540 40 pin Bluetooth transceiver.
(B) on circuit board.
HP Handheld Conferenc 2016
14
HP Handheld Conferenc 2016
15
Convenience Test Fixture
HP Handheld Conferenc 2016
16
Temperature – Time Plot Example
HP Handheld Conferenc 2016
17
HP Handheld Conferenc 2016
18
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.
HP Handheld Conferenc 2016
19
THE END
Thank You
HP Handheld Conferenc 2016
20